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See detailLa réception de la littérature médiévale de langue française en Hainaut (XVe-XVIe s.)
Adam, Renaud ULg

Scientific conference (2016, May 17)

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See detailAvatar et jeu vidéo. Réflexions sur le rapport au corps virtuel
Delbouille, Julie ULg

Scientific conference (2016, May 17)

Cette intervention se penche sur les différentes modalités relationnelles qui s’instaurent entre le corps physique du joueur et son répondant virtuel. La question du rapport au corps est centrale dans la ... [more ▼]

Cette intervention se penche sur les différentes modalités relationnelles qui s’instaurent entre le corps physique du joueur et son répondant virtuel. La question du rapport au corps est centrale dans la relation avatariale : touchant à la tension entre l’ « ici » — la physicalité du joueur faisant face à l’écran — et le « là » — la présence de l’avatar au sein de l’univers de jeu —, elle met en relief le paradoxe caractérisant le rôle actif du joueur, dont l’action s’étend à la fois au sein et aux marges du jeu. Cette problématique du rapport au corps, entendu comme « moyen général d’avoir un monde », apporte un regard neuf sur l’histoire du jeu vidéo depuis ses origines. [less ▲]

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See detailNew elicitors to protect wheat against Zymoseptoria tritici: biocontrol tools for IPM strategies
Le Mire, Géraldine ULg; SIAH, Ali; BRISSET, Marie-Noëlle et al

Conference (2016, May 17)

Elicitors are increasingly considered as promising biocontrol tools in the preventive treatment of plants against various diseases. These plant-immunity triggering compounds, also called “stimulators of ... [more ▼]

Elicitors are increasingly considered as promising biocontrol tools in the preventive treatment of plants against various diseases. These plant-immunity triggering compounds, also called “stimulators of plant natural defenses”, induce a general and systemic resistance of the plant to a large spectrum of biotic stresses. Today, focus is made on the crucial protection of wheat, as one of the most cultivated crop plants in the world. This crop is constantly challenged by a persistent and harmful fungus known as Zymoseptoria tritici, responsible of the Septoria Tritici Blotch (STB) disease. Control of this disease mainly depends on phytosanitary products, and the social and economic importance of wheat make it all the more urgent to identify and develop new elicitors as biocontrol tools in wheat IPM strategies. This study focuses on the screening of nine molecules of various origins and structures for their potential eliciting properties to protect winter wheat against Zymoseptoria tritici. Three products were selected after screening trials in greenhouse conditions: EGL1, EGL4, and EGL5. They were efficient to reduce foliar disease symptoms from 40 to 80%. The biocide activity and phytotoxicity of these 3 products were evaluated directly towards the pathogen and the plant under laboratory and greenhouse conditions, respectively. On the other hand, the triggered signaling pathways were investigated by studying the activity of the defense-related enzymes lipoxygenase (LOX), peroxidase (POX) and phenylalanine ammonia-lyase (PAL) in treated wheat leaves. In addition, the expression of five defense genes (lox, pal, pox2, chi, pr1) was studied by qRT-PCR in wheat leaves treated with these elicitors and/or inoculated with Zymoseptoria tritici. The corresponding results will be presented and discussed, with the perspective to investigate the influence of environmental parameters on the elicitation capacity and the efficacy of the elicitors in field conditions. [less ▲]

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See detailDevelopment of a semiochemical-based control method against the walnut husk fly
Sarles, Landry ULg; Heuskin, Stéphanie ULg; Verheaghe, Agnès et al

Conference (2016, May 17)

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Peer Reviewed
See detailHerbicidal activity of Tunisian plant extracts against various weeds
Ben Kaab, Sofiène ULg; Parisi, Olivier ULg; Ksouri, Riadh et al

Conference (2016, May 17)

In agricultural systems, weeds can dramatically reduce crop yields (by the constant competition for water and nutrients) and interfere with plant functions to suppress their growth causing huge economic ... [more ▼]

In agricultural systems, weeds can dramatically reduce crop yields (by the constant competition for water and nutrients) and interfere with plant functions to suppress their growth causing huge economic losses.Yield losses can reach up to 34% in crops. Plant extracts are known since a long time to have phytotoxicity potentialities and could be used as new natural compounds with bioherbicide activities. The study began with the selection of ten plant species suspected to be phytotoxic due to their wealth of phenolic, terpene and alcaloid compounds, such as flavonoids and phenolic acids coumarins. Then, three weeds were selected from Maghreb and European weeds as models (Phalaris minor, Sylibum marianum and Trifolium incanatum). Aerial plant materials were grounded and macerated with methanol for 24H. Methanol was then eliminated along rotavapor. The yield of plant extract varied between 5.29% and 29.71 % following the species. The essential oil was extracted by hydrodistillation using a Clevenger type apparatus (with a yield of 1.2%). Methanol extracts and the essential oil were then tested for their herbicidal activity in post-emergence assays against the three weeds species.The most active extracts were selected and formulated to increase their efficiency. Post-emergence bioassays consisted in spraying each extract at 3 concentrations (7500, 20000 and 340000 ppm) at 2 leaves stage . Pelargonic acid was used as commercial positive control at 34000 ppm. After 7 days on incubation in greenhouses, results showed that E6, presented poor phytotoxicity against three weeds at 7500 and 20000 ppm. However, E6 caused total wilting and several leaf blight against Phalaris minor and Trifolium incanatum and sever necrosis against Sylibum marianum. At that higher concentration of 34000 ppm. , the extracts E3 and E8 and the essential oil appeared also phytotoxic. The three extracts and the essential oil were selected for the formulation. After formulation to enhance the distribution, the coverage and the penetration of the active molecules at 34000 ppm, E3, E6, E8 and essential oil presented a high herbicidal activity compared with the extracts without formulation. E6 with the formulation has completely punctured Trifolium incanatum and suppressed growth of Phalaris minor and Sylibum marianum. The results of this study reveal that plant extracts, after formulation, are more effective in inhibiting weed growth. The strong weed suppressive ability of formulated E6 therefore offers interesting possibilities as an effective natural environment-friendly approach for weed management. [less ▲]

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See detailInsights gained from metagenomic sequencing of apple fruit surface (cv. Pinova)
Angeli, Dario; Massart, Sébastien ULg; Sare, Abdoul Razack ULg et al

Poster (2016, May 17)

Plant microbial communities (microbiota) living at the surface of fruit have been the source of the majority of biocontrol agents (BCAs). Despite this interest, their role as a community has been poorly ... [more ▼]

Plant microbial communities (microbiota) living at the surface of fruit have been the source of the majority of biocontrol agents (BCAs). Despite this interest, their role as a community has been poorly studied so far. They holistic study was an unattainable objective due to the absence of techniques to survey microbial communities and their evolution. The recent developments in high-throughput sequencing (HTS) have now enabled the holistic analysis of the microbiota genomes. A pioneering assay has been carried out to get insight into the microbiota of apple surface through metagenome sequencing. Apple from Pinova cultivar have been sampled in orchard and the microbiota isolated. After DNA extraction, the HTS assay generated 14.5 Gbases which were assembled in 133,888 contigs. These contigs provided useful information on taxonomic composition of the microbiota. A total of 1398 bacterial species and 397 fungal species have been identified. Among them, 22 species corresponded to known apple pathogens (Penicillium expansum, Penicillium spp, Botrytis cinerea, Monilinia fructicola, Nectria haematococca, Glomerella cingulate, G. graminicola, Alternaria alternate, Alternaria brassicicola, A. citri, A. longipes, A. solani, A. tenuissima, Fusarium solani, F. oxysporum, F. culmorum, F. lateritium, Mucor circinelloides, M. hiemalis, F. racemosus, Venturia inaequalis, Cladosporium cladosporioides). In addition, several contigs were assigned to species or genus of known BCA strains like Pichia canadensis, Bacillus sp., Debaryomyces hansenii, Aureobasidium pullulans and Pantoea vagans. These results will be discussed. In any case, these results underline a very diverse microbial community whose role needs to be characterized. In this line, the functional analysis (gene function determination) of the contigs is ongoing. [less ▲]

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See detailInfluence of the balls kinematics and ball/race contact models on quasi-static approaches for ball bearing
Servais, Christophe ULg; Bozet, Jean-Luc ULg

Conference (2016, May 17)

The frictional power dissipated within dry lubricated ball bearings is a prime concern, especially for high speed applications. Nevertheless, the exact balls behavior is still a source of interrogations ... [more ▼]

The frictional power dissipated within dry lubricated ball bearings is a prime concern, especially for high speed applications. Nevertheless, the exact balls behavior is still a source of interrogations. Firstly, a comparison of several ball/race contact models has been performed by prescribing the kinematical variables. This has been done by using an existing quasi-static approach to reach the ball bearing equilibrium. Secondly, a parametric study has been carried out on the ball kinematics. This time the contact model remained fixed. The results demonstrate the predominance of the kinematics on the ball bearing behavior with an emphasis on the dissipated power within ball/race contacts. This shows that the kinematics must be rightly computed. On the other hand, the ball/race contact model doesn’t necessitate a high refinement in order to evaluate the ball bearing equilibrium. Conversely, this refinement is essential for a precise evaluation of the power losses. [less ▲]

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See detailMonstres et images : premiers pas vers une redéfinition de la monstruosité cinématographique
Jousten, Lison ULg

Conference (2016, May 17)

La communication propose un déplacement du monstre en tant qu’objet filmé pour l’envisager en tant que forme filmique. Cette hypothèse est avancée puis expérimentée par le biais d'une étude de cas.

Detailed reference viewed: 13 (1 ULg)
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See detailEmbargo on Lion Hunting Trophies from West Africa: An Effective Measure or a Threat to Lion Conservation ?
Bouché, Philippe; Crosmary, William; Kafando, Pierre et al

in PLoS ONE (2016), 11(5), 0155763

The W-Arly-Pendjari (WAP) ecosystem, shared among Benin, Burkina Faso and Niger, represents the last lion stronghold of West Africa. To assess the impact of trophy hunting on lion populations in hunting ... [more ▼]

The W-Arly-Pendjari (WAP) ecosystem, shared among Benin, Burkina Faso and Niger, represents the last lion stronghold of West Africa. To assess the impact of trophy hunting on lion populations in hunting areas of the WAP, we analyzed trends in harvest rates from 1999 to 2014. We also investigated whether the hunting areas with higher initial hunting intensity experienced steeper declines in lion harvest between 1999 and 2014, and whether lion densities in hunting areas were lower than in national parks. Lion harvest rate remained overall constant in the WAP. At initial hunting intensities below 1.5 lions/1000km2, most hunting areas experienced an increase in lion harvest rate, although that increase was of lower magnitude for hunting areas with higher initial hunting intensity. The proportion of hunting areas that experienced a decline in lion harvest rate increased at initial hunting intensities above 1.5 lions/1000km2. In 2014, the lion population of the WAP was estimated with a spoor count at 418 (230–648) adults and sub-adult individuals, comparable to the 311 (123–498) individuals estimated in the previous 2012 spoor survey. We found no significant lion spoor density differences between national parks and hunting areas. Hunting areas with higher mean harvest rates did not have lower lion densities. The ratio of large adult males, females and sub-adults was similar between the national parks and the hunting areas. These results suggested that the lion population was not significantly affected by hunting in the WAP. We concluded that a quota of 1 lion/1000km2 would be sustainable for the WAP. Based on our results, an import embargo on lion trophies from the WAP would not be justified. It could ruin the incentive of local actors to conserve lions in hunting areas, and lead to a drastic reduction of lion range in West Africa. [less ▲]

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See detailVortex Image Processing (VIP) package for high-contrast direct imaging
Gómez González, Carlos ULg; Absil, Olivier ULg; Wertz, Olivier ULg et al

Poster (2016, May 16)

VIP is a Python instrument-agnostic toolbox featuring a flexible framework for reproducible and robust data reduction. VIP currently supports three high-contrast imaging observational techniques: angular ... [more ▼]

VIP is a Python instrument-agnostic toolbox featuring a flexible framework for reproducible and robust data reduction. VIP currently supports three high-contrast imaging observational techniques: angular, reference-star and multi-spectral differential imaging. The code can be downloaded from our git repository on Github: http://github.com/vortex-exoplanet/VIP [less ▲]

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See detailEfficacy of the RemoweLL cardiotomy reservoir for fat and leucocyte removal from shed mediastinal blood: a randomized controlled trial.
LAGNY, Marc-Gilbert ULg; GOTHOT, André ULg; HANS, Grégory ULg et al

in Perfusion (2016)

Efficacy of the RemoweLL cardiotomy reservoir for Fat and Leucocyte removal from shed mediastinal blood: a randomized controlled trial. ABSTRACT (176 words) Introduction Re-transfusion of lipid particles ... [more ▼]

Efficacy of the RemoweLL cardiotomy reservoir for Fat and Leucocyte removal from shed mediastinal blood: a randomized controlled trial. ABSTRACT (176 words) Introduction Re-transfusion of lipid particles and activated leucocytes with shed mediastinal blood (SMB) can aggravate cardiopulmonary bypass-associated inflammation and increase the embolic load. This study evaluated the fat and leucocyte removal capacity of the RemoweLL cardiotomy reservoir. Methods Forty-five patients undergoing elective on-pump cardiac surgery were randomly allocated to filtration of SMB using the RemoweLL or the Admiral cardiotomy reservoir. The primary outcome was the drop in leucocytes and lipid particles obtained with the two filters. The effect of the filters on other blood cells and inflammatory mediators such as myeloperoxidase (MPO) was also assessed. Results The RemoweLL cardiotomy filter removed 16.5 % of the leucocytes (P < 0.001) while no significant removal of leucocytes was observed with the Admiral (P = 0.48). The percentage reductions in lipid particles were similar in the two groups (26% vs 23 %, P = 0.2). Both filters similarly affected the level of MPO (P = 0.71). Discussion The RemoweLL filter more effectively removed leucocytes from SMB than the Admiral. It offered no advantage in term of lipid particle clearance. [less ▲]

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See detailFUNCTIONAL SPECIFICATION METHODOLOGY FOR AN ARCHITECTURAL MODELER SUPPORTING A MODULAR CONSTRUCTIVE SYSTEM
Boulanger, Christelle ULg; Rahhal, Anabelle ULg; Delfosse, Vincent ULg et al

in Design2016 (2016, May 16)

This article presents a methodological approach which helped the software development of an architectural modeler that aims to support the life cycle of buildings with a modular construction system. The ... [more ▼]

This article presents a methodological approach which helped the software development of an architectural modeler that aims to support the life cycle of buildings with a modular construction system. The modeler assists the building composition processes, the production of useful documents like drawing plans, quantities and specifications, and the evaluation of the thermal performance of the building at any phase of its design. Conducted within a multidisciplinary team of architects engineers, computer engineers and ergonomists, this methodology is based on a constant interaction between the various skills, so that the different perspectives are systematically integrated into the decision process. The methodology is based on the analysis of three fields of functions (composition - production and evaluation) which are considered simultaneously through a theoretical framework stemming from ergonomics: Activity Theory [Engeström 1987]. At first, the software development context is presented. Then, the choice of the Activity Theory as a framework for the analysis will be motivated. The next section relates the multiple concepts of the methodology to each others, in order to identify the principles as well as the inputs and the outputs. Each step in its implementation is then described, followed by the results in terms of the software interface. Finally, the discussion that will follow will consider the contributions and limitations of this methodological approach in the understanding of a system, in order to offer an efficient IT support. [less ▲]

Detailed reference viewed: 21 (3 ULg)
See detailMonstruosité cinématographique : déployer l’écart
Jousten, Lison ULg

Scientific conference (2016, May 13)

La communication revient sur la possibilité d’étudier autrement la monstruosité cinématographique, en effectuant un pas de côté par rapport aux approches qui ont abordé le monstre comme motif. Elle ... [more ▼]

La communication revient sur la possibilité d’étudier autrement la monstruosité cinématographique, en effectuant un pas de côté par rapport aux approches qui ont abordé le monstre comme motif. Elle propose de penser l’écart dans l’écart, en déployant cette notion matricielle à au moins trois niveaux : dans la figure même du monstre, dans la nature des films envisagés, ainsi que dans la constitution du corpus. [less ▲]

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See detailVivre et faire vivre la transdisciplinarité. Retour d'expérience du cours "Approche intégrée d'une question d'environnement"
Denayer, Dorothée ULg; Melard, François ULg; Semal, Nathalie ULg

Conference (2016, May 13)

Cette communication présente la démarche pédagogique qui a mené un collectif d'enseignants, à la recherche d'une approche intégrée des questions d'environnement au développement d’une approche ... [more ▼]

Cette communication présente la démarche pédagogique qui a mené un collectif d'enseignants, à la recherche d'une approche intégrée des questions d'environnement au développement d’une approche d’apprentissage où l'entrée des publics concernés dans le dispositif d'apprentissage (Public-based-learning) permettent de faire vivre plutôt que d'enseigner aux étudiants la transdisciplinarité. Cette communication, centrée sur le collectif enseignant, developpe la dimension fondamentalement expérientielle et pratique de l’interdisciplinarité et son ancrage dans un certain type d’engagement du collectif.] [less ▲]

Detailed reference viewed: 17 (1 ULg)
See detailApproches intégrées en Sciences Pharmaceutiques
Servais, Anne-Catherine ULg; Ziemons, Eric ULg

Conference (2016, May 13)

Detailed reference viewed: 13 (1 ULg)