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See detailEtude épidémiologique des comportements alimentaires au service de la promotion de la santé
Lair, ML; Alkerwi, A; Couffignal, S et al

Conference (2009)

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See detailThe Didam framework Disaggregated demand and assignment models for combined passengers and freight transport
Barthélemy, Johan; Cornelis, Eric; Jourquin, Bart et al

Conference (2009)

The objective of this paper is to present the methodological developments in the DIDAM (Disaggregated demand and assignment models for combined passengers and freight transport) research project, which ... [more ▼]

The objective of this paper is to present the methodological developments in the DIDAM (Disaggregated demand and assignment models for combined passengers and freight transport) research project, which aims at advancing fundamental research in transportation modelling and analysis, using two complementary methodologies. The first is to develop a joint methodological approach for both freight and passenger transport, and the second is to base this common approach on the use of models that are as disaggregate and realistic as possible. Furthermore, the methods will be designed to cope with the important question of competition for infrastructure. The project is mainly organized around two themes. Each of them covers both freight and passengers aspects, in a manner which promotes collaborative work between the partners of the project. The first theme is concerned with disaggregate demand modelling issues, the second deals with innovative aspects of (joint) traffic assignment. Working at a fully disaggregate level is however not always easy. If such models are already available for passenger demand and traffic, disaggregate tools are still largely missing for freight transport. This is not only true at the operational level, but, more crucially, at the conceptual level. This is why our research program adopts, in this domain, a progressive approach that introduces disaggregation gradually into existing methods and models. This entails research in a full spectrum of issues, ranging from concepts definition (who are the actors, how can they be characterized ...) to validation exercises using available data sources [less ▲]

Detailed reference viewed: 66 (1 ULg)
See detailDetection of High molecular mass for MALDI Imaging and Profiling
Franck, Julien; Longuespée, Rémi ULg; Bonnel, David et al

Conference (2009)

Detailed reference viewed: 8 (0 ULg)
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See detailImpact of Public Market Information System (PMIS) on Farmers Food Marketing Decisions : Case of Benin
Kpènavoun Chogou, Sylvain; Lebailly, Philippe ULg; Adégbidi et al

Conference (2009)

Detailed reference viewed: 60 (9 ULg)
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See detailMarket area of intermodal rail-road container terminals embedded in a hub-and-spoke network
Limbourg, Sabine ULg

Conference (2009)

This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into account ... [more ▼]

This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into account.Aparticular way to model rail-road transport on hub-and-spoke networks is outlined and illustrated on the trans-European networks. The market area of an optimal eight hubs network configuration is presented both for the p-hub median and the p-hub centre problem. This is followed by a discussion about the evolution of the market area according to the number and locations of the implemented hubs. [less ▲]

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See detailFonctions attentionnelles et exécutives dans la dyspraxie développementale
Lejeune, Caroline ULg; Catale, Corinne ULg; Meulemans, Thierry ULg

Conference (2009)

La dyspraxie développementale se manifeste principalement par des difficultés motrices qui interfèrent avec différentes situations de la vie quotidienne (écriture, dessin, habillage, …). Ces troubles du ... [more ▼]

La dyspraxie développementale se manifeste principalement par des difficultés motrices qui interfèrent avec différentes situations de la vie quotidienne (écriture, dessin, habillage, …). Ces troubles du geste, qui touchent environ 6 % des enfants de 5 à 11 ans, entraînent de lourdes conséquences sur les plans familial, scolaire et social. Plusieurs études ont montré qu’un déficit des capacités d’inhibition, de planification et de mémoire de travail était fréquemment observé chez les enfants souffrant de dyspraxie. Toutefois, en raison des nombreux problèmes méthodologiques rencontrés dans ces recherches (et plus particulièrement liés à l’absence de contrôle de la présence ou non du trouble de l’attention avec/sans hyperactivité – TDA/H - chez la population d’enfants dyspraxiques), les relations entre les troubles attentionnels et les troubles moteurs restent encore à l’heure actuelle mal comprises. L’objectif de cette étude vise à dégager, au travers d’une évaluation du fonctionnement attentionnel et exécutif, le profil neuropsychologique d’enfants diagnostiqués dyspraxiques, et ce en contrôlant la présence d’un TDA/H. Nous avons administré à 23 enfants dyspraxiques âgés de 6 à 12 ans et 23 enfants de contrôle (appariés sur base de l’âge, du sexe et du niveau d’études des parents) des tâches attentionnelles (alerte, attention sélective et divisée) de la batterie TEA et des épreuves exécutives (inhibition [Stroop et Go/No Go], flexibilité cognitive [TEA], mémoire de travail [BTT et mise à jour de TEA] et planification [Tour de Londres]). Les analyses de comparaison de moyennes indiquent que les enfants dyspraxiques présentent des performances inférieures à celles des enfants de contrôle pour l’essentiel des tests neuropsychologiques administrés. Toutefois, deux tiers des enfants dyspraxiques de notre échantillon présentent un trouble de l’attention (critères du DSM-IV). L’analyse des résultats au sein du groupe « dyspraxique sans TDA », permet de montrer que les difficultés de planification, d’attention sélective visuelle, d’inhibition motrice, de mémoire à court terme (BTT et mise à jour) sont spécifiques à la dyspraxie et donc indépendant de la présence d’un trouble de l’attention. En conclusion, cette étude préliminaire montre qu’une grande proportion d’enfants qui présentent une dyspraxie souffre également d’un trouble de l’attention. L’analyse du profil des enfants dyspraxiques montre des difficultés qui touchent l’ensemble des fonctions attentionnelles et exécutives. Toutefois, les difficultés d’analyse visuelle, de planification et de mémoire de travail semblent, quant à elles, spécifiques à la dyspraxie développementale. Des études futures réalisées sur un plus grand nombre de participants permettraient de confirmer cette hypothèse. [less ▲]

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See detailHyperfine Structure and Isotope Shifts in Iron Atoms
Krins, Stéphanie ULg; Oppel, S.; Huet, Nicolas ULg et al

Conference (2009)

Detailed reference viewed: 26 (4 ULg)
See detailSimplifier les interfaces utilisateurs
Nyssen, Anne-Sophie ULg

Conference (2009)

Detailed reference viewed: 21 (1 ULg)
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See detailMeasuring home-range quality in the frugivorous gibbon (Hylobates lar)
Hambuckers, Alain ULg; Huynen, Marie-Claude ULg; Savini, Tommaso

Conference (2009)

Detailed reference viewed: 43 (11 ULg)
See detailDebriefing des accidents d'anesthésie
Nyssen, Anne-Sophie ULg

Conference (2009)

Detailed reference viewed: 25 (0 ULg)
See detailNarrative roles of the particle isT
Gillen, Todd Jonathan ULg

Conference (2009)

Detailed reference viewed: 6 (0 ULg)
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See detailValidation for analytical methods : reducing the risk of decisions. Tutorial 04
Boulanger, Bruno ULg; Moonen, François; Hubert, Philippe ULg

Conference (2009)

Detailed reference viewed: 39 (6 ULg)
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See detailNonribosomal peptides producing strains isolated from Bikalga and Soumbala fermented condiments of Burkina Faso
Savadogo, Aly; Chollet, Marlène; Tapi, Arthur et al

Conference (2009)

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See detailMacrophyte biological index for rivers (MBIR) application for an ecological assessment of walloon rivers, prelilminary investigations.
Sossey Alaoui, Khadija ULg; Galoux, D.; Rosillon, Françis ULg

Conference (2009)

Samples were collected from 45 sites along the Walloon river network in 2007, in accordance with the Water Framework Directive (WFD, European Union, 2000), used to define the overall ecological status of ... [more ▼]

Samples were collected from 45 sites along the Walloon river network in 2007, in accordance with the Water Framework Directive (WFD, European Union, 2000), used to define the overall ecological status of rivers. Within each collected sample, macrophyte data were gathered at species level and the main water quality parameters were analyzed. This involved the use of two approaches: firstly, methods of ordination and classification (Principal Component Analysis and Multiple Factorial Analysis) and secondly, aquatic macrophyte community indexes. The Macrophyte Biological Index for Rivers (MBIR) was used to define the ecological status of the macrophyte community in response to eutrophication pressure. Four trophic qualities were detected in all the monitored stations: 56% of the sites showed a good trophic quality, with the Ardennes region in the leading position and only 2% of the sites showed a poor trophic quality. A Multiple Factorial Analysis (MFA) made it possible to regroup the species according to their ecological affinities and to specify their indicator values in relation to some abiotic parameters. As a result, a rivers typology was outlined based on this analysis. The dendrogram of the Hierarchical Cluster Analysis (HCA) gave three clusters determined by active variables of each compartment that defined functional parts of the Walloon network: Chiloscyphus polyanthos (L.) Corda, Rhynchostegium riparioides(Hedw.)C.Jens., Fontinalis squamosa(Hedw) and Ranunculus penicillatus (Dum.)Bb. showed an oligotrophic status and low mineralization in the Ardennes (GI), while P. pectinatus(Linne), Cladophora glomerata(Linnaeus)proved to be found more often in eutrophicated waters in the Region limoneuse (GIII). Pellia endvifolia (Dicks.)Dum, Fissidens crassipes(Br.Eur);Cinclidotus riparius (Web. & Mohr.) appeared in the Condroz and Famenne, rivers characterized by a high concentration of nitrogen (N-35. NO3-) (GII). [less ▲]

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See detailErythromycin time-kill activity on activated sludge
Louvet, Jean-Noël ULg; Heliun, Yannick; Potier, Olivier et al

Conference (2009)

Detailed reference viewed: 11 (2 ULg)
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See detailTotal Error for the validation of bioanalytical methods
Rozet, Eric ULg; Boulanger, Bruno ULg; Rudaz, S. et al

Conference (2009)

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See detailCo-transplantation of mesenchymal stem cells might mitigate acute GvHD without abrogating graftversus- tumour alloreactivity after allogeneic transplantation with non-myeloablative conditioning
Baron, Frédéric ULg; WILLEMS, Evelyne ULg; LECHANTEUR, Chantal ULg et al

Conference (2009)

Background: Results of nonmyeloablative HCT in pts with HLA-mismatched donors have been disappointing due to high incidence of graft rejection and severe acute GVHD. Recent studies have suggested that ... [more ▼]

Background: Results of nonmyeloablative HCT in pts with HLA-mismatched donors have been disappointing due to high incidence of graft rejection and severe acute GVHD. Recent studies have suggested that infusion of mesenchymal stem cells (MSC) the day of HCT might promote engraftment and prevent acute GVHD after myeloablative allogeneic HCT. However, some studies suggested that MSC co-infusion might abrogate graft-versus-host alloreactivity and graft-versus-tumor effects. This prompted us to investigate whether MSC infusion a few hours before HCT could allow nonmyeloablative HCT from HLA-mismatched donors to be performed safely (i.e. with a 100-day incidence of nonrelapse mortality < 35%). Methods: 20 patients with hematological malignancies were given MSC (1-2 x 10E6 cells/kg) from third party donors a few hours before PBSC from HLA-mismatched unrelated donors, after conditioning with 2 Gy TBI and fl udarabine 90 mg/m. Postgrafting immunosuppression included tacrolimus (day -3 to +180; tapered by day +365) and mycophenolate mofetil (tid days 0 to +42). HLA-compatibility was assessed at the HLA-A, -B, -C, -DRBI and DQBI loci: 13 pairs were mismatched for at least one HLA class I antigen (including 4 pairs who were also mismatched for 1 HLA-class II antigens (n=3) or 1 HLA-class I allele (n=1)), 1 pair was mismatched for 2 HLA class II alleles, while 6 pairs were mismatched for a single HLA class I (n=3) or HLA class II (n=3) alleles. Results: Median follow-up for surviving patients was 288 (range, 76-571) days. One patient with secondary AML had primary graft rejection, while the remaining 19 patients had sustained engraftment. Median donor T-cell chimerism levels on days 28, 100, 180 and 365 after HCT were 90%, 98%, 96%, and 98%, respectively. Grade II, III and IV acute GVHD were seen in 5, 2 and 1 patients, respectively, while 7 experienced NIH moderate/severe chronic GVHD. Three of 7 patients with measurable disease at transplantation achieved complete remission on days 41, 104 and 353 after HCT. Two patients died of nonrelapse causes on days 74 and 114 after HCT, while 3 died of disease progression. Projected 1-yr overall and progressionfree survivals were 77% and 61%, respectively. Conclusions: HLA-mismatched nonmyeloablative HCT with MSC co-infusion appeared to be safe, with MSC co-infusion possibly mitigating graft-versus-host alloreactivity without abrogating graft-versus-tumor effects. Survival is encouraging. [less ▲]

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See detailUniversal applicability of Total Error for the validation of bioanalytical methods
Rozet, Eric ULg; Boulanger, Bruno ULg; Rudaz, S. et al

Conference (2009)

An innovative universal strategy using Total Error is thus proposed to decide about the method’s validity that controls the risk of accepting an unsuitable assay together with the ability to predict the ... [more ▼]

An innovative universal strategy using Total Error is thus proposed to decide about the method’s validity that controls the risk of accepting an unsuitable assay together with the ability to predict the reliability of future results. Several examples of applications of this validation methodology to various types of assays [LC-MS, ELISA, Bio-Assays] will be presented. [less ▲]

Detailed reference viewed: 67 (18 ULg)
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See detailModerator : Prosthetic Session
Van Heusden, Alain ULg

Conference (2009)

Detailed reference viewed: 5 (1 ULg)
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See detailThe CORALS project: simulated Cosmic Radiations and Alternative Splicing.
Lambert, Charles ULg; Battout, S.; Van Oostveldt, P. et al

Conference (2009)

Detailed reference viewed: 8 (0 ULg)
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See detailImmunization and dermatophytes
Baldo, Aline ULg; Tabart, J.; Mathy, Anne ULg et al

Conference (2009)

Detailed reference viewed: 30 (8 ULg)
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See detailImpact of Prosthesis-Patient Mismatch on Short-term Mortality Following Mitral Valve Replacement.
Magne, Julien ULg; Mathieu, P; Dumesnil, JG et al

Conference (2009)

Detailed reference viewed: 3 (0 ULg)
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See detailA revised carbon budget for the North Sea
Paetsch, J.; Kuehn, W.; Borges, Alberto ULg et al

Conference (2009)

Detailed reference viewed: 5 (0 ULg)
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See detailDetecting preferential flow and transport in soils using electrical resistivity tomography
Vanderborght, Jan; Oberdoerster, Christoph; Garré, Sarah ULg et al

Conference (2009)

Detailed reference viewed: 47 (1 ULg)
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See detailAgroecology and the emergence of "Publics"
Stassart, Pierre M ULg

Conference (2009)

Detailed reference viewed: 17 (1 ULg)
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See detailSearching for traces of life in ancient stromatolites down to the nanoscale.
Lepot, Kevin ULg; Philippot, Pascal; Benzerara, Karim et al

Conference (2009)

Detailed reference viewed: 25 (1 ULg)
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See detailSurvey of air-ice ocean carbon dioxyde exchange over arctic sea-ice
Heinesch, Bernard ULg; Aubinet, Marc ULg; Carnat, Gauthier et al

Conference (2009)

Detailed reference viewed: 23 (5 ULg)
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See detailInvolvement of the secreted serine protease Sub3 of Microsporum canis in adherence to feline epidermis
Mathy, Anne ULg; Tabart, J.; Vermout, S. et al

Conference (2009)

Detailed reference viewed: 29 (9 ULg)
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See detailThe role of the specific immune response on cecal colonization of slow-growing broiler chickens reared on litter contaminated by Campylobacter jejuni
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Beckers, Yves ULg et al

Conference (2009)

The aim of this experiment was to study the relation between the specific immune response and infection of slow-growing broiler chickens reared on straw litter contaminated by Campylobacter jejuni. The 11 ... [more ▼]

The aim of this experiment was to study the relation between the specific immune response and infection of slow-growing broiler chickens reared on straw litter contaminated by Campylobacter jejuni. The 11-weeks experiment was carried out in a 45 m2 broiler house with 500 chickens from 1 day of age, which had access to an open-air range. Litter contamination was performed before the setting up of the chicks by rearing campylobacter-positive cocks. These birds were also used to contaminate the open-air range during one week before the exit of the chickens, at 5 weeks of age. Blood samples were taken weekly on 20 chickens for anti-campylobacter IgG quantitative measurements on serum. Chickens were then euthanized and cecal contents and bile were collected for Campylobacter enumeration and anti-campylobacter IgA quantification, respectively. A high serum anti-campylobacter IgG titer of 110.13 was measured in one-day-old chicks. The IgG antibodies level significantly decreased to 5.60 at 28 days of age which coincided with the onset of Campylobacter infection in the flock. A significant reduction of the cecal colonization from 11 weeks of age was correlated with the increase in biliary IgA titers. These results suggest that the 2-3 week’s delay generally observed in poultry production before flock infection by Campylobacter may be, at least partly, explained by the protective effect of maternal antibodies. The increase of secretory immune response as bird age may help to limit Campylobacter population in the chicken gut. [less ▲]

Detailed reference viewed: 77 (23 ULg)
See detailConséquences négatives de la présence d'antibiotiques dans les eaux usées lors de leur épuration par boues activées
Louvet, Jean-Noël ULg; Attik, Ghania; Dumas, Dominique et al

Conference (2009)

Detailed reference viewed: 9 (0 ULg)
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See detailHandling range ambiguities in registration-based range-dependence compensation for conformal array STAP
Ries, Philippe; Verly, Jacques ULg; Lapierre, Fabian D.

Conference (2009)

Detailed reference viewed: 5 (0 ULg)
See detailSlope stability analyses in loess deposits in Fergana Valley (Kyrgyzstan)
Mamyrova, Raushan; Bourdeau, Céline; Havenith, Hans-Balder ULg et al

Conference (2009)

Detailed reference viewed: 10 (0 ULg)
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See detailApplications of 3D visualization in science and engineering
Burrus, Nicolas; Hoyoux, Thomas; Verly, Jacques ULg

Conference (2009)

Detailed reference viewed: 13 (2 ULg)
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See detailGeneration of Long-lived Entanglement on Demand in Remote Qubits
Schilling, U.; Thiel, C.; Bastin, Thierry ULg et al

Conference (2009)

Detailed reference viewed: 8 (2 ULg)
See detailFORMULATION OF PEPTIDE-LOADED LIPOSOMES FOR INTRAVENOUS DELIVERY: OPTIMIZATION OF THE ENCAPSULATION EFFICIENCY
Ducat, Emilie ULg; Brion, Michael; Evrard, Brigitte ULg et al

Conference (2009)

Purpose: Print 3G is a peptidic antagonist of oncoprotein involved in breast cancer, containing 25 amino acids. The purpose of this work is to study the peptide encapsulation into PEGylated liposomes ... [more ▼]

Purpose: Print 3G is a peptidic antagonist of oncoprotein involved in breast cancer, containing 25 amino acids. The purpose of this work is to study the peptide encapsulation into PEGylated liposomes composed of SPC:CHOL:mPEG-2000-DSPE (47:47:6). Methods: Loaded unilamellar vesicles were prepared by hydration of lipid film method. Unfortunately, a loss of Print 3G was observed during the different steps of this manufacturing technique giving rise to encapsulation efficiencies (EE) close to 0 %. Thus, the freeze-thawing method was used to enhance the amount of Print 3G encapsulated into blank liposomes prepared using the above procedure. Because many factors may influence the peptide entrapment into the vesicles (number of freeze-thawing cycles (NC), lipid concentration (LC), peptide concentration (PC) and mixing time (MT)), a design of experiment (DOE) was performed (for the screening, a Plackett and Burman plan; for the optimization, a central composite design). EE were calculated in terms of quantity of peptide loaded in liposomes as a function of quantity operated (EEp) or quantity of lipids (EEl). Results: The EE obtained by the freeze-thawing method in standard conditions (Katanasaka, Ida et al., 2008; Maeda, Bharate et al., 2008), amounted to 26.20 ± 7.98 %, n=3 (EEp) and to 0.26 ± 0.074 % (EEl). Among the different considered parameters, the screening permitted to identify two factors having a positive and significant influence on the EE: NC and LC. Concerning the PC and MT, no influence was revealed. For the second part of the DOE, the positive factors were optimized and obtained results revealed a theoretical optimum at 64.75 ± 3.55 % when 11 freeze-thawing cycles were applied (NC) and for the following LC: 36.1 mM SPC, 36.1 mM CHOL and 4mM mPEG-2000-DSPE. The experimental results showed an encapsulation efficiency of 62.68 ± 2.93 %. Photon correlation spectroscopy and freeze-fracture electron microscopy were also realized to examine the liposome integrity, before and after the freeze-thawing cycles. Conclusion: Changing the manufacturing technique permitted a significant encapsulation of Print 3G into liposomes. The DOE led to a significant improvement of encapsulation efficiencies. References: (1) Katanasaka,Y., Ida,T., Asai,T., Maeda,N., Oku,N., 2008. Effective delivery of an angiogenesis inhibitor by neovessel-targeted liposomes. International Journal of Pharmaceutics, 360, 219-224. (2) Maeda,H., Bharate,G.Y., Daruwalla,J., 2008. Polymeric drugs for efficient tumor-targeted drug delivery based on EPR effect. Eur. J Pharm Biopharm. Acknowledgements: This work was supported by the Ministry of the Walloon Region. [less ▲]

Detailed reference viewed: 87 (2 ULg)
See detailSteps Prior to the RAI Instrument Implementation in Belgium
Degey, S; Tancredi, A; Renard, F et al

Conference (2009)

Detailed reference viewed: 8 (0 ULg)
See detailAnalyse de bijoux mérovingiens en Belgique
Mathis, François ULg; Othmane, Guillaume; Vrielynck, Olivier

Conference (2009)

Detailed reference viewed: 13 (2 ULg)
See detailLes perturbateurs endocriniens et le monde agricole
Charlier, Corinne ULg

Conference (2009)

Detailed reference viewed: 16 (5 ULg)
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See detailStability-activity relationships in natively unstable proteins
Feller, Georges ULg

Conference (2009)

Detailed reference viewed: 9 (0 ULg)
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See detailWerkt een muzikale opleiding de perceptie van prosodische prominentie in een vreemde taal in de hand?
Degrave, Pauline; Hiligsmann, Philippe; Rasier, Laurent ULg

Conference (2009)

Detailed reference viewed: 14 (0 ULg)
See detailComa, consciousness and the brain
Noirhomme, Quentin ULg

Conference (2009)

Detailed reference viewed: 7 (1 ULg)
See detailEarly land plant evolution: a tremendous success story.
Gerrienne, Philippe ULg

Conference (2009)

Detailed reference viewed: 5 (0 ULg)
See detailDevelopment of a quantitative method to detect trace amounts of hazelnut and soy allergens in food
Dobson, Rowan ULg; Fourdrilis, Séverine; Kirsch, Stéphanie ULg et al

Conference (2009)

Detailed reference viewed: 20 (3 ULg)
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See detailContrastieve onderzoeksmodellen onder de loep
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2009)

Detailed reference viewed: 23 (1 ULg)
See detailLos retos de la inmigración a nivel local
Domínguez, Marta; Brey, Elisa ULg

Conference (2009)

Detailed reference viewed: 2 (0 ULg)
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See detaile-Demos, We'll Show You What We've Got !"
Lecomte, Béatrice ULg

Conference (2009)

Detailed reference viewed: 39 (17 ULg)
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See detailTerritorial reconversion and territorial knowledge: added-value of a territorial intelligence process in Flémalle (Belgium)
Breuer, Christophe ULg; Devillet, Guénaël ULg; Merenne-Schoumaker, Bernadette ULg

Conference (2009)

Our communication aims at spreading the participative approach implemented in Flémalle (“new governorship”), but also at discussing the contribution of the theorical and applied research undertaken within ... [more ▼]

Our communication aims at spreading the participative approach implemented in Flémalle (“new governorship”), but also at discussing the contribution of the theorical and applied research undertaken within the framework of the coordination action of the European Network of Territorial Intelligence for local projects (NTIC, participation, animation, analyzes….), the objective is to measure its added-value and transposability within territories of industrial tradition in a context of financial and temporal limitations. [less ▲]

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See detailL'agriculture familiale africaine au coeur des Objectifs du Millénaire pour le Développement (OMD)
Berti, Fabio ULg; Lebailly, Philippe ULg

Conference (2009)

L’agriculture familiale africaine est concernée directement par l’Objectif 1 du Millénaire pour le Développement, de réduire de moitié d’ici 2015 l’extrême pauvreté et la faim. En effet, selon la plupart ... [more ▼]

L’agriculture familiale africaine est concernée directement par l’Objectif 1 du Millénaire pour le Développement, de réduire de moitié d’ici 2015 l’extrême pauvreté et la faim. En effet, selon la plupart des observateurs, 70% des pauvres sont localisés dans les zones rurales et sont agriculteurs. Dans ce contexte, il importe de s’interroger sur l’avenir des exploitations agricoles familiales en Afrique. Après avoir présenté la problématique générale de l’exploitation agricole familiale dans le développement, les auteurs présentent une analyse au départ des constats qu’ils ont pu réaliser, respectivement pour les filières de rente de la zone forestière au Cameroun et pour le coton, dans plusieurs pays d’Afrique de l’Ouest. Les analyses sont réalisées à partir des observations effectuées au départ de différentes études financées essentiellement par la Commission européenne au cours de ces dernières années. Il en résulte que le terme « agriculture familiale » recouvre des réalités très différentes avec une différenciation de plus en plus poussée des exploitations agricoles. Dans le même temps, il subsiste de nombreuses exploitations familiales plus « traditionnelles » mêlant des logiques d’autoconsommation et de marché avec des dotations en facteurs plus inégales et donc plus vulnérables. L’enjeu primordial des politiques agricoles qui seront définies sera précisément de prendre en considération la dimension spécifique de ce type d’exploitation, cible prioritaire dans la lutte contre la pauvreté. L’orientation des politiques mises en œuvre autour du seul objectif de la production de biens agricoles ne permettra pas de réduire les disparités internes et souvent croissantes observées. Il convient donc d’intégrer les dimensions sociales et environnementales dans les objectifs des politiques agricoles à mettre en œuvre. [less ▲]

Detailed reference viewed: 112 (21 ULg)
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See detailGeneration of total angular momentum eigenstates in remote qubits
Maser, A.; Schilling, U.; Bastin, Thierry ULg et al

Conference (2009)

Detailed reference viewed: 6 (1 ULg)
See detailUncertainty of carbon dioxide fluxes introduced by different high-pass filtering methods
Ibrom, Andreas; Geißler, Simon; Laffineur, Quentin ULg et al

Conference (2009)

Detailed reference viewed: 14 (5 ULg)
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See detailAudiovisual reflexive methodology : How & What can be said, Where?
Stassart, Pierre M ULg; Mathieu, Valérie

Conference (2009)

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See detailAchromatization of solar concentrator thanks to diffractive optics
Languy, Fabian ULg; Lenaerts, Cedric ULg; Loicq, Jerôme ULg et al

Conference (2009)

Refractive solar concentrators suffer from important chromatic aberration. To enhance solar cell performance and increase the concentrating ratio, we propose an hybrid (diffractive/refractive) lens which ... [more ▼]

Refractive solar concentrators suffer from important chromatic aberration. To enhance solar cell performance and increase the concentrating ratio, we propose an hybrid (diffractive/refractive) lens which allows a more uniform flux density and an achromatized (in the sense of achromatic doublet) illumination of the cell. To solve the problem of high diffraction efficiency, we turn to multilayer diffractive lenses to have broadband high diffraction efficiency optimized on solar spectrum. Rigorous coupled wave analysis simulations were performed in order to check the validity of scalar theory, they led to a new order of magnitude for the ratio period/wavelength which has been found to be around 100 in place of 10. [less ▲]

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See detailPlant and their soil environment
Delaplace, Pierre ULg

Conference (2009)

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See detailIRF3 is required for induction of allergic airway inflammation by dendritic cells
Marichal, Thomas ULg; Bedoret, Denis; Goriely, M. et al

Conference (2009)

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See detailPlant defense reactions stimulated following perception of Bacillus lipopeptides
Ongena, Marc ULg; Henry, G.; Jourdan, E. et al

Conference (2009)

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See detailInfluences de l'environnement sur la fonction endocrinienne
Charlier, Corinne ULg

Conference (2009)

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See detailHet leerdercorpus Nederlands in theorie en in de praktijk
Perrez, Julien ULg; Degand, Liesbeth

Conference (2009)

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See detailLe Dévonien: des mousses à l'arbre.
Gerrienne, Philippe ULg

Conference (2009)

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See detailThe use of time use surveys to study activity participation: emerging issues
Cools, Mario ULg; Moons, Elke; Wets, Geert

Conference (2009)

Time use surveys often are carried out to identify, classify and quantify social behaviour of people by focusing on the activities that people perform. Time use data, in the transportation field often ... [more ▼]

Time use surveys often are carried out to identify, classify and quantify social behaviour of people by focusing on the activities that people perform. Time use data, in the transportation field often referred to as activity-based data, can be used to study a variety of sociological, economic, and technological phenomena. Studying behaviour, social networks and transport patterns are a few of the topics that can be analysed based on these time use data. This first introductory paper discusses some emerging issues in the collection of travel-related data such as automatic spatial information recording using cell phones and GPS, and survey design experiences. On the one hand new technology offers the opportunity to record at a relative low cost a wide variety of the data, while on the other hand new problems occur. One of such problems for instance is the problems of ‘cold starts’ faced with GPS devices, clouding the first minutes of recording after each restart of the device after it was turned off completely. Notwithstanding, applications of new technologies offer the opportunity for performing detailed space-time analyses in different fields ranging from epidemiology to transportation science. Some of these applications are highlighted in this session. Next to the advantages and potential risks of new technologies, this introductory paper also discusses the combination of different modes to analyze space-time behaviour. In particular, this study investigates potential mixed mode design effects, observed in a large activity-based travel survey, using a PDA application on the one hand, and traditional paper and pencil diaries on the other hand. The mixed-mode effects are analysed using heteroscedastic linear regression models, taking into account not only mode-effects, but also potential fatigue-effects. The results show that in this mixed-mode survey no attrition effects are present, and that the survey mode (PDA versus paper and pencil) has no direct impact on the quantities investigated (number of out-of-home activities reported and number of trips). [less ▲]

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See detailSaturn Auroral Images and Movies from Cassini UVIS
Pryor, Wayne; Esposito, L.W.; Stewart, A.I.F. et al

Conference (2009)

Cassini’s Ultraviolet Imaging Spectrograph (UVIS) has completed five years of study of Saturn’s atmosphere and auroras. Two long slit spectral channels are used to obtain EUV data from 56.3-118.2 nm and ... [more ▼]

Cassini’s Ultraviolet Imaging Spectrograph (UVIS) has completed five years of study of Saturn’s atmosphere and auroras. Two long slit spectral channels are used to obtain EUV data from 56.3-118.2 nm and FUV data from 111.5-191.3 nm. 64 spatial pixels along each slit are combined with slit motion to construct spectral images of Saturn. Auroral emissions are seen from electron-excited molecular and atomic hydrogen. In 2008-2009 UVIS obtained data with the spacecraft well out of Saturn’s ring plane, permitting UVIS to obtain a number of short movies of the rotating auroral structures. In some movies a cusp-like feature is present near noon inside the oval. One movie from 2008 day 201 shows parallel linear features on the day side almost at right angles to the main auroral oval that appear, then lengthen, separate in the middle, and then fade away. The same movie also shows one bright "polar flare" inside the oval. A few of the most recent images were obtained at sufficiently close range that 2 spacecraft slews were needed to completely cover the oval. These images provide almost 100 pixels of information across the oval and clearly show multiple arcs of emission on the main oval and scattered emissions inside the oval. We will discuss these features, their locations, and possible interpretations. We also report on a search for an Enceladus auroral footprint on Saturn. [less ▲]

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See detailPerturbations endocriniennes liées aux polluants environnementaux
Charlier, Corinne ULg

Conference (2009)

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See detailTerritory knowledge (B1pc) - Discussion report
Breuer, Christophe ULg

Conference (2009)

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See detailESCWA’s Social guide for Urban Observatories – presentation and discussion
Farah, Jihad ULg

Conference (2009)

In this paper we will make a brief presentation of ESCWA’s Social Guide for Urban Observatories (SGUO), then we will provide a commented example of application of its indicators’ framework. We will try to ... [more ▼]

In this paper we will make a brief presentation of ESCWA’s Social Guide for Urban Observatories (SGUO), then we will provide a commented example of application of its indicators’ framework. We will try to identify the essential determinants leading to the development of urban fragmentation. The SGUO indicators’ framework is a problem-based one. It aims to identify the determining conditions leading to the development of an urban “problem” and its impact on sustainable urban development. The author thinks of the SGUO indicators’ framework methodology as a building site in progress. On one hand, there’s still need to develop some of its theoretical framework components, mainly the concept of determinants. On the other, it should be revisited, in a participatory way. A primary application in a set of different urban observatories in the ESCWA region is needed in order to adapt it to the specificities of the region’s urban problems and local conceptions of sustainable development. [less ▲]

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