References of "Scientific congresses and symposiums"
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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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See detailCan tropical basil be integrated in vegetable crop pest management?
Yarou, Boni Barthélémy ULg; Verheggen, François ULg; Heuskin, Stéphanie ULg et al

Poster (2016, May 17)

To address human and environmental health issues related to the use of synthetic pesticides, it is important to explore other ecological pest management approaches. Within this context, a study was ... [more ▼]

To address human and environmental health issues related to the use of synthetic pesticides, it is important to explore other ecological pest management approaches. Within this context, a study was conducted to evaluate the toxic and repellent effect of Ocimum gratissimum L. (Lamiaceae) on Myzus persicae S. (Aphididae). The toxicity of O. gratissimum essential oil (EO) was evaluated on M. persicae comparing 3 concentrations (0.001%; 0.01% and 0.1%) to a control (15% sucrose). Mortality rate and fecundity were assessed for each concentration. The observations were made daily, for 4 days, on 12 replicates per treatment. To test the repellent effect of O. gratissimum plants, 2 treatments were compared: a group of 8 Amaranthus cruentus L. (Amaranthaceae) plants with 1 plant of O. gratissimum in the middle and a group of 9 A. cruentus plants (control). The distribution of aphids was analyzed 12 days after the middle plant infestation (20 aphids per plant) for each treatment (6 replicates per treatment). O. gratissimum EO was found toxic from a concentration of 0.01%, with a mortality rate of 34% versus 12% for the control ; The fecundity felt from 30 larvae after 4 days (control) to 15 larvae for the 3 doses of the EO. The analysis with the generalized linear mixed model with Poisson error distribution followed by Turkey test (5 %) showed that EO is significantly more toxic than the control, both for mortality and fecundity (p <0.001). In association test, the population of M. persicae (15 aphids per plant) was significantly (p<0,001) lower when A. cruentus plants was associated with O. gratissimum plant than with the control (22 aphids per plant). Furthermore, the population increases gradually as one moves away from the infestation point in association test whereas it decreases in the control. With regards to these results, it appears that O. gratissimum has biocide effects on M. persicae. This plant may be used in an integrated pest management strategy in the production of vegetable to reduce the use of synthetic pesticides and avoid chemicals residues. [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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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 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 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 ▲]

Detailed reference viewed: 61 (4 ULg)
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.

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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 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 ▲]

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See detailActivités d'intégration multidisciplinaire
Theunissen, Catherine ULg

Conference (2016, May 13)

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See detailRestricted interests in autism with versus without speech onset delay : the importance of perceptually versus thematically organized interests
Chiodo, Liliane ULg; Majerus, Steve ULg; Eusèbe, Sandrine et al

Poster (2016, May 13)

Objectives : To explore whether autistic adults with vs without speech delay also differ in the perceptual vs thematic nature of their restricted interests.

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See detailLe concours d’habitations ouvrières du Tribouillet (1930) et la réception des théories de l’habitation minimum à Liège
Charlier, Sébastien ULg

Conference (2016, May 13)

En 1930, Liège et Anvers accueillent chacune une vaste exposition célébrant le centenaire de l’indépendance de la Belgique. À Liège, probablement sous l’impulsion de Victor Bourgeois, un concours ... [more ▼]

En 1930, Liège et Anvers accueillent chacune une vaste exposition célébrant le centenaire de l’indépendance de la Belgique. À Liège, probablement sous l’impulsion de Victor Bourgeois, un concours d’habitations ouvrières est organisé sur les hauteurs de la ville, dans le quartier du Tribouillet. L’événement est un moment fort de l’histoire de l’architecture à Liège, ville industrielle belge de seconde importance. Si l’essentiel du site, urbanisé selon le modèle de la cité-jardin, est occupé par des petites habitations unifamiliales sans innovations particulières, un secteur est réservé aux maisons dites « minimum ». Il y a, dans le chef des organisateurs, une volonté manifeste de s’inscrire dans la continuité des réflexions du CIAM 2 de Francfort et de faire écho aux « Journées de l’habitation minimum » présentées à Bruxelles en 1930. Des personnalités reconnues pour leur expertise en matière de logement public comme Victor Bourgeois, Louis Herman de Koninck, Fernand Bodson ou encore Joseph Moutschen sont invitées à présenter leurs conceptions du logement « moderne ». Notre contribution se propose, d’abord, de situer ces interventions dans la généalogie de la production de ces architectes en soulignant leurs particularités spatiales, constructives et esthétiques. Il s’agit également de montrer comment ces « phénomènes » ont influé sur la pratique locale, en particulier sur les jeunes architectes fascinés par les modèles internationaux, et comment ils furent reçus tant dans la maîtrise d’ouvrage privée que publique. Notre intervention montrera également en quoi l’expérience de 1930 fut un moment charnière dans les politiques locales de logement public. Car si l’historiographie reconnaît la portée du concours du Tribouillet, en tant que phénomène de spectacularisation locale et nationale des concepts du Mouvement moderne, elle oublie que l’événement marqua provisoirement la fin du recours au modèle de la cité-jardin à Liège. Écrasées par des charges de plus en plus lourdes, les sociétés de logement réinvestissent les centres urbains abandonnant le modèle de la petite maison unifamiliale au profit de l’immeuble à appartements. Une attention particulière sera également apportée au contexte culturel et au vif débat que connaît l’architecture à Liège dans l’entre-deux-guerres à travers l’analyse des revues locales et des expositions qu’elles organisèrent pour diffuser leurs modèles. [less ▲]

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See detailApproches intégrées en Sciences Pharmaceutiques
Servais, Anne-Catherine ULg; Ziemons, Eric ULg

Conference (2016, May 13)

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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 ▲]

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See detailNanoparticles and microorganisms applied in groundwater decontamination
Lambert, Stéphanie ULg; Lavigne, Benoît

Conference (2016, May 13)

Detailed reference viewed: 22 (1 ULg)
See detailTailoring γ-Al2O3 supports with specific silicon precursors
Claude, Vincent ULg; Vilaseca, Miriam; Heinrichs, Benoît ULg et al

Poster (2016, May 13)

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See detailEsthétique et repésentation dans les bandes dessinées d'Afrique noire francophone
Goufo Zemmo, ULg

Conference (2016, May 13)

Les campagnes de sensibilisation développées ces dernières années à travers internet, les festivals de bandes dessinées, sans oublier le succès de la bande dessinée Aya de Yopougon ont contribué ... [more ▼]

Les campagnes de sensibilisation développées ces dernières années à travers internet, les festivals de bandes dessinées, sans oublier le succès de la bande dessinée Aya de Yopougon ont contribué concrètement à lever un pan de voile sur les romans graphiques africains d’expression française. À ce sujet, de nombreuses interrogations se formulent quant à la réelle consommation de ces produits par les Africains, et les formes esthétiques qui en découlent. L’image n’est jamais neutre, elle est toujours le résultat du déploiement d’une subjectivité. Ainsi, nous nous proposons dans le cadre de cette communication de dépasser la question du fonctionnement esthétique de la bande dessinée d’Afrique noire francophone pour comprendre le système représentationnel et intersubjectif qui y est construit, ce qui nous permettra de montrer que les images réfléchissent non seulement sur le monde mais aussi sur elles-mêmes et par elles-mêmes. Il s’agira aussi de montrer qu’en tant que « lieu de savoir », la bande dessinée devient le siège concret de l’activité humaine et de la productivité sociale et culturelle. En tant que tel, les dispositions spatiales qui en sont faites, ne seraient pas du tout aléatoires, mais s’inscriraient dans un processus permettant une interprétation des sujets représentés de manière générale, et notamment les sujets féminins. [less ▲]

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See detailBildwissenschaft, l’image entre signe et perception (K. Sachs-Hombach)
Hagelstein, Maud ULg; Letawe, Céline ULg

Conference (2016, May 13)

« Une science générale de l’image n’a pas (encore) réussi à s’établir » (I, §1) . Face à ce constat, Sachs-Hombach suppose qu’il serait possible – et nécessaire – de définir un « cadre théorique commun » ... [more ▼]

« Une science générale de l’image n’a pas (encore) réussi à s’établir » (I, §1) . Face à ce constat, Sachs-Hombach suppose qu’il serait possible – et nécessaire – de définir un « cadre théorique commun » et un « programme de recherche intégratif » pour les différentes disciplines concernées par la science générale de l’image. « Par cadre théorique, je comprends un ensemble de formules qui résume les hypothèses communes de différentes théories » (I, §3) . Autrement dit, le travail de définition du cadre théorique implique que l’on dégage du commun, non pas au sens d’une métathéorie surplombante qui identifierait les « conditions constitutives » des théories spécifiques/particulières, mais au sens d’une description cartographique des lieux de croisement de ces théories – envisagées du point de vue de leur contenu (c’est-à-dire essentiellement : du point de vue des moyens conceptuels mobilisés). Les outils conceptuels de base doivent être décrits et expliqués, mais aussi légitimés (telle serait la tâche proprement philosophique d’une étude critique de la Bildwissenschaft). Bien entendu, la difficulté tient au fait qu’il existe une grande variété de concepts d’image (il faut pouvoir en tenir compte), ainsi qu’une multitude de modes d’accès disciplinaires à l’expérience iconique. Le cadre théorique doit pouvoir inclure tous les phénomènes liés à l’image – et se résout par conséquent aux seules caractéristiques générales. Etablir la cartographie des « concepts fondamentaux » constitue la tache philosophique par excellence et permet de s’orienter adéquatement dans un domaine : voir quels sont les instruments conceptuels à disposition et à quels problèmes potentiels ils s’attachent. Attention par « philosophie », il faut entendre non pas une discipline instituée mais une tâche systématique que toute science porte en elle (et que plusieurs agents peuvent bien entendu endosser, indépendamment de leur formation disciplinaire). Et la question qu’il s’agit de poser en priorité (c’est-à-dire : de poser encore, de maintenir, de relancer) : Qu’est-ce qu’une image / représentation iconique (représentation par l’image) ? (I, §6), quels types d’objets rencontrent les conditions définitoires minimales de l’image ? Quels types d’expérience définissent les limites de ce qu’on peut appeler l’expérience iconique ? Une fois les contours dessinés, la carte continue à nous offrir une infinité de positions possibles entre lesquelles nous pouvons nous déplacer. [less ▲]

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See detailCharacterization of FRD3, a zinc and iron homeostasis actor, in Arabidopsis
Scheepers, Maxime ULg; Charlier, Jean-Benoit; Spielmann, Julien ULg et al

Poster (2016, May 13)

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Peer Reviewed
See detailCombined Centralized and Local Voltage correction in Active Distribution Network
Soleimani Bidgoli, Hamid ULg

in Combined Centralized and Local Voltage correction in Active Distribution Network (2016, May 12)

This paper presents a two-level real-time voltage control scheme to address the voltage violations in distribution grids hosting a significant number of Dispersed Generation Units (DGUs). The proposed ... [more ▼]

This paper presents a two-level real-time voltage control scheme to address the voltage violations in distribution grids hosting a significant number of Dispersed Generation Units (DGUs). The proposed scheme consists of a centralized and a local reactive power control. The local control provides fast response after a disturbance, reducing its impact and enhancing voltage quality. The centralized control relies on Model Predictive Control (MPC). It uses measurements collected throughout the network to bring the voltages inside desired limits. To do so, it adjusts in a coordinated way the reactive power set-points of the DGUs taking into account the local controls. The control method effectiveness has been evaluated on a 75-bus 11-kV test system hosting 22 DGUs. [less ▲]

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See detailBildwissenschaft - Image et langage (introduction au colloque)
Hagelstein, Maud ULg

Conference (2016, May 12)

En guise d’introduction très rapide, je voudrais rappeler dans ses grandes lignes le projet auquel est liée l’organisation de ces journées de recherche. Le projet tente d’établir une archéologie de la ... [more ▼]

En guise d’introduction très rapide, je voudrais rappeler dans ses grandes lignes le projet auquel est liée l’organisation de ces journées de recherche. Le projet tente d’établir une archéologie de la théorie de l’image contemporaine, en particulier (en priorité) dans son versant germanophone, celui de la « science de l’image » (Bildwissenschaft) – discipline qui est, pour des raisons diverses (obstacle de la langue, nouveauté des problèmes, hermétisme des débats, etc.), encore peu connue chez nous. Or, me semble-t-il, l’explosion récente de la théorie de l’image (depuis les années 1990), théorie de l’image qui s’est décentrée par rapport à son milieu naturel et déployée sur de multiples territoires disciplinaires, appelle une nouvelle cartographie des études visuelles, qui reste à établir, ainsi qu’une redéfinition philosophique de l’image (ou des images) et de l’expérience qui en découle (les phénomènes visuels et iconiques étant à ce point diversifiés aujourd’hui que de nombreuses définitions sont en circulation sans que l’on perçoive toujours leur cohérence). Comme l’écrivait récemment Klaus Sachs-Hombach : « Une science générale de l’image n’a pas encore réussi à s’établir » (I, §1). L’idée de ce projet sur la Bildwissenschaft consiste donc à envisager du point de vue de la méthode les différentes approches récentes de l’image pour tenter d’identifier ce qu’elles ont en commun (c’est loin d’être évident). L’option qui me semblait pouvoir être investie dans un premier temps consiste à rapporter ces développements récents à la discipline d’interprétation des images née en Allemagne au début du XXe siècle, quelques décennies auparavant, (avec A. Warburg et surtout E. Panofsky), à savoir : l’iconologie. En effet, à mes yeux, du point de vue de son ancrage philosophique, la théorie de l’image actuelle puise ses principales ressources conceptuelles dans l’iconologie (et les problèmes théoriques qui lui sont associés). En quoi consiste ce modèle ? Pour le dire trop vite, la méthode iconologique vise principalement l’interprétation du contenu symbolique des images. Elle repose entièrement – ou en tout cas majoritairement – sur une compréhension symbolique des artefacts visuels : face à une œuvre picturale, par ex., on part bien entendu de ce qui est donné à la perception (les éléments sensibles et matériels présentés par l’œuvre), pour dégager petit à petit la signification profonde et intrinsèque de l’œuvre. Dans cette optique, l’image a donc pour vocation de délivrer un message, au même titre que le langage, mais avec des moyens différents. Or, si on tente de rapporter la Bildwissenschaft – telle qu’elle se déploie considérablement depuis quelques années – à l’iconologie, on doit admettre que ce modèle (le modèle iconologique) joue surtout négativement. Depuis la fin des années 1980, la méthode iconologique a commencé à générer chez les théoriciens de l’art et du visuel (en général), toutes sortes de réactions d’insatisfaction – voire même de franche hostilité. Et pour la plupart de ces auteurs, l’iconologie va servir de repoussoir autant que de modèle. Pour quelle raison ? Les critiques généralement adressées par les théoriciens contemporains à la méthode iconologique s’articulent le plus souvent autour du problème de la prédominance du paradigme langagier pour l’analyse des images. Or, à force de considérer trop strictement l’image sur le mode du signe qu’il faut lire et décrypter, on risque de l’assimiler purement et simplement à d’autres types de signes, notamment langagiers, et de diluer sa spécificité dans une théorie symbolique trop large. Globalement, il me semble que les différentes réactions s’accordent (ou en tout cas pourraient s’accorder) sur le fait que l’iconologie – telle qu’elle se présente dans sa version traditionnelle – doit être complétée : l’approche symbolique des œuvres doit par ex. pouvoir s’appuyer sur une attention soutenue à leurs modes de présentation (dans ce cas, les outils du « formalisme esthétique » peuvent alors être convoqués) ou à leur matérialité (les outils « phénoménologiques » peuvent idéalement venir au secours de l’analyse). En résumé, depuis la fin des années 1980, l’héritage iconologique est mis en question par des chercheurs qui – en réalité – veulent donner au concept d’iconologie un sens plus actuel et consacrent leurs efforts à l’étude de la logique des images (logique iconique), en tant qu’elle n’est pas contaminée par le modèle langagier. Autrement dit, les protagonistes de la Bildwissenschaft concernés par ces problématiques font le pari suivant : on peut étudier la logique du visuel en dehors de toute référence au langage et à sa syntaxe propre. Ils pensent pouvoir montrer en quoi une proposition visuelle diffère radicalement d’une proposition langagière. En rapportant la Bildwissenschaft à l’iconologie, on rencontre donc très vite la thématique centrale de l’iconic turn (tournant iconique), qui consiste à défendre l’idée d’une spécificité absolue de l’image à l’égard du langage. On l’a dit : Les défenseurs du tournant iconique pensent renverser la domination du paradigme langagier pour l’interprétation des images. Plutôt que de se concentrer exclusivement sur l’étude des contenus symboliques, il importe à leurs yeux de se concentrer sur ce qui fait la spécificité intrinsèque de l’image et de montrer comment sa matérialité affecte et contamine directement la production du sens. Contre la sémiotisation excessive des formes d’expression visuelle, il faudrait donc affirmer une fonction intransitive des images, c’est-à-dire redonner à l’image une épaisseur propre, qui ne renvoie qu’à elle-même. De nombreux auteurs s’inscrivent dans cette perspective (c’est le cas notamment de G. Boehm, qui veut sortir du paradigme langagier pour l’interprétation des images, ou de L. Wiesing, qui tente une définition asémantique de l’image). Les débats autour de l’iconic turn sont très particuliers et finalement difficiles à traiter. D’abord parce que l’iconic turn fait suite au linguistic turn (tournant déclaré dans la célèbre anthologie de Rorty - 1967), et appelle à sa suite d’autres tournants (on parle volontiers aujourd’hui d’un tournant anthropologique des études visuelles, comme on parle d’ailleurs aussi d’un tournant visuel de l’anthropologie, etc.). Or, ces changements radicaux de direction, ces changements de paradigme, finissent à mon avis par nous faire perdre nos repères (il y a trop de turn, pour le dire platement) et on a le sentiment de tourner en rond. Ensuite, autre difficulté : les débats liés à l’iconic turn sont souvent animés par la volonté de défendre – jusqu’à l’absurde – la valeur primordiale et la préséance absolue de l’image sur le langage. Si on s’enlise dans les positions parfois stéréotypées de ce débat, on pourra difficilement sortir du scepticisme langagier le plus stérile (l’idée que le langage manque inévitablement le caractère sensible de l’image). Pourtant, je ne voudrais pas non plus rendre trop caricatural ce débat qui m’intéresse tellement. D’un côté, j’ai l’impression qu’on y revient toujours, de l’autre, qu’on en est déjà sorti. On y revient toujours parce que ce problème continue à être essentiel pour toute une série d’auteurs qui cherchent obstinément à vouloir distinguer l’image des autres formes d’expression, à vouloir construire de nouvelles iconologies. Et l’effort qui consiste à essayer d’identifier les spécificités logiques du visuel doit sans cesse se renouveler ; les théories de la spécificité sont très fragiles parce que les contre-exemples et contre-arguments viennent très vite à l’esprit dès qu’il s’agit de séparer les pouvoirs de l’image et du langage. Dès que quelqu’un dit : « l’image fait ceci que le langage ne fait pas », on trouve quelqu’un d’autre pour répondre : « comment ? Mais si, le langage fait ça aussi ». Néanmoins, si on dégage peu de certitudes, de points fixes, ces débats sont loin d’être stériles (pour le dire vite : on a l’impression tout de même d’augmenter notre connaissance des images en traversant ces discussions). On y revient donc toujours mais en même temps on en est déjà sorti (et presque toujours déjà sorti) : aujourd’hui, on rencontre de multiples propositions, qui émanent soit du champ de la Bildwissenschaft lui-même, soit de l’extérieur (et parfois même très en amont de ces débats), et qui présentent des modèles plus complexes et nuancés qui n’opposent pas frontalement image et langage. Mais qui font l’effort de penser leur complémentarité. Et en réalité, ces efforts nous donnent à penser que la séparation des pouvoirs de l’image et du langage est peut-être très artificielle – ou en tout cas fragile – dans certains cas, mais qu’elle continue à être utile. [less ▲]

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See detailCentralized Model Predictive Control of Multi-Terminal Direct Current Grids
Papangelis, Lampros ULg

in Proc. of the 8th IEEE Benelux Young Researchers Symposium 2016 (2016, May 12)

This work describes a centralized control for Multi-Terminal Direct Current (MTDC) grids. It is based on Model Predictive Control (MPC) whose aim is to satisfy a desired schedule, while avoiding or ... [more ▼]

This work describes a centralized control for Multi-Terminal Direct Current (MTDC) grids. It is based on Model Predictive Control (MPC) whose aim is to satisfy a desired schedule, while avoiding or correcting any system limit violation. The central controller collects voltage and power measurements from the converters of the system in regular intervals and sends back converter power setpoints. The latter are calculated by solving a quadratic programming problem subject to linear constraints and using a simplified model for the DC system. In addition, the overall MTDC grid control structure including the local and the centralized controllers is described. [less ▲]

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See detailSingle cell analysis of Escherichia coli outer membrane porin composition in response to nutrient depletion
Delepierre, Anissa ULg; Brognaux, Alison ULg; Bauwens, Julien ULg et al

Poster (2016, May 12)

Characterization of outer membrane integrity into isoclonal population of Escherichia coli using fluorescent probe specific to cell viability: propidium iodide (PI) staining; combined to FACS cytometry ... [more ▼]

Characterization of outer membrane integrity into isoclonal population of Escherichia coli using fluorescent probe specific to cell viability: propidium iodide (PI) staining; combined to FACS cytometry and proteomic studies of sorted subpopulations. The results tend to reveal two distincts cellular strategies: Cells positively probed by PI offer a high outer membrane protein (OMP) content, indicating nutrient competence in response to substrate limitative conditions. Unprobed cells, characterized by a low OMPs rate, could suffer from growth arrest and develop stress responses (Crp, Cra, RpoS,RpoN, RpoH-dependent). [less ▲]

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See detailMolecular detection of single nucleotide polymorphisms on whole blood without DNA extraction
Detemmerman, L.; BOEMER, François ULg; SEGERS, Karin ULg et al

Poster (2016, May 12)

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See detailCONTAMINANTES ORGÁNICOS EMERGENTES (COEs) EN LAS AGUAS SUBTERRÁNEAS (AASS) EN ESPAÑA
Jurado Elices, Anna ULg; Vázquez-Suñé, Enric; Carrera, Jesús et al

Conference (2016, May 12)

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See detailSpatial Analysis of the Landslide Risk in the Cameroon Volcanic Line (CVL)
Mukenga, Williams ULg; Havenith, Hans-Balder ULg; Medjo Eko, Robert et al

Poster (2016, May 12)

Landslides are recognized as important geomorphologic process due to the role they play in the development of hill slopes in mountainous regions, and to related socio-economic consequences. There are many ... [more ▼]

Landslides are recognized as important geomorphologic process due to the role they play in the development of hill slopes in mountainous regions, and to related socio-economic consequences. There are many causes of landslides and their distribution varies with the changing conditioning factors. Slope stability depends on a number of causative factors and the knowledge of these variables can help to predict the type of landslide expected in the future. In this study, past landslide activity and triggering factors will be used to assess mass movement hazards along the Cameroon Volcanic Line (CVL). Spatial aspects will be studied in terms of landslide susceptibility maps that are important for development planning and disaster management. The current synthesis of landslide susceptibility map at regional scale is based on a literature review to inventory passed mass movement impacts, on the detection of landslide features from Google Earth imagery, combined with spatial analysis using Geographical Information Systems (GIS) and remote sensing. One of the most critical stages in landslide susceptibility mapping is the selection of landslide pre-conditioning, conditioning and triggering factors and weighting of the selected causative factors in accordance to their influence on slope stability. Google earth helps for delineating past (but recent) and present landslide activity whereas GIS is suitable when deriving static factors (slope aspect and surface curvature) and time-dependent factors (annual precipitation and changing groundwater table level) that are needed to produce landslide susceptibility maps. Landslide susceptibility mapping is based on the assumption that future landslides will occur under similar circumstances as past and present mass movements. Different methods, including the weight of evidence methods, are used for landslide susceptibility mapping along the Cameroon Volcanic line, as the area is known to be highly susceptible to landslide occurrences. [less ▲]

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See detailLa cristallurie
GADISSEUR, Romy ULg

Conference (2016, May 12)

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See detailPRESENCIA, COMPORTAMINETO Y RIESGO AMIBIENTAL DE LOS PRODUCTOS DE CUIDADO PERSONAL (PCPs) EN LA INTERFAZ RÍO-ACUÍFERO
Serra-Roig, M. Pau; Jurado Elices, Anna ULg; Diaz-Cruz, M. Silvia et al

Poster (2016, May 12)

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See detailRecollection and Familiarity in Normal Aging
Simon, Jessica ULg; Gilsoul, Jessica ULg; Bastin, Christine ULg

Conference (2016, May 11)

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See detailAccurate measurement of radius evolution as a function of direction in 3D images
Plougonven, Erwan ULg; Hubert, Julien ULg; Collin, Frédéric ULg et al

Poster (2016, May 11)

Very often the reason for using of X-Ray tomography in a research project is to measure the evolution of some geometrical characteristic. The sought characteristic may be explained in simple words like ... [more ▼]

Very often the reason for using of X-Ray tomography in a research project is to measure the evolution of some geometrical characteristic. The sought characteristic may be explained in simple words like size, shape, or distance, but in practice measures based on these notions can have a complex implementation. We present a simple problem, measuring the evolution of radius in a cylindrical sample (a common shape for sample preparation for tomography) and how this value differs according the direction in which we look, when such evolution is known to be anisotropic. The solution is not unique, but we show that a naïve manual approach are not accurate enough, and how even a simple geometric notion such as radius needs a thorough definition in relation to its applicability to 3D image analysis. We extend the argument to how a good understanding of the notions and algorithms used in the quantification of geometrical characteristics can directly affect the pertinence and representativity of the results. [less ▲]

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See detailModelling nitrogen incorporation by primary producers of a Mediterranean coastal area
Elkalay, Khalid; Frangoulis, Constantin; Richir, Jonathan ULg et al

Conference (2016, May 11)

The aim of this study was to simulate the uptake flow of nitrogen (gN m-2) of P. oceanica meadow for 4 primary producers of the bay of Calvi (Corsica, France) (phytoplankton, macro-algae, the Posidonia ... [more ▼]

The aim of this study was to simulate the uptake flow of nitrogen (gN m-2) of P. oceanica meadow for 4 primary producers of the bay of Calvi (Corsica, France) (phytoplankton, macro-algae, the Posidonia oceanica leaves and their epiphytes). The model developed for this purpose simulates the evolution of nitrogen incorporation. The effect of the light intensity, and the water column temperature and concentration in internal and external nitrogen on nitrogen incorporation by the 4 primary producers is modeled. Thus, the incorporation rate of both NO3-and NH4+by phytoplankton was more important than for benthic producers. Macro-algae incorporations had intermediate incorporation rates between the ones of, the phytoplankton and P. oceanic leaves and their epiphytes. The incorporation of NH4+ by the phytoplankton is higher than the incorporation of NO3-. The model appears well adapted to establish the main environmental factors that determine the incorporation of inorganic nitrogen by the various primary producers. It is also able to represent the relative importance of nitrogen incorporation by the various producers. [less ▲]

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See detailHIGHER MALE THAN FEMALE RECOMBINATION RATE LARGELY CONTROLLED BY MISSENSE VARIANTS IN RNF212, MLH3, HFM1, MSH5 AND MSH4 IN CATTLE
Kadri, Naveen Kumar ULg; Harland, Chad ULg; Faux, Pierre ULg et al

Poster (2016, May 11)

We herein study genetic recombination in three dairy cattle populations from France, New-Zealand and the Netherlands. We identify 2,395,177 crossover (CO) events in sperm cells transmitted by 2,940 sires ... [more ▼]

We herein study genetic recombination in three dairy cattle populations from France, New-Zealand and the Netherlands. We identify 2,395,177 crossover (CO) events in sperm cells transmitted by 2,940 sires to 94,516 offspring, and 579,996 CO events in oocytes transmitted by 11,461 cows to 25,332 offspring. When measured in identical family structures, the average number of CO in males (23.3) was found to be larger than in females (21.4). The heritability of global recombination rate (GRR) was estimated at 0.13 in males and 0.08 in females. The genetic correlation was equal to 0.66, indicating that shared variants are influencing GRR in both genders. Haplotype-based genome-wide association studies revealed seven genome-wide significant QTL. Variants identified by next-generating sequencing in 5 Mb windows encompassing the QTL peaks were imputed in order to perform a sequence-based association analysis. For four QTLs, we identified missense mutations in genes known to be involved in meiotic recombination among the most significantly associated variants. The P259S variant identified in RNF212 had already been reported, whereas missense mutations in MLH3 (N408S), HFM1 (S1189L), MSH5 (R631Q), MSH4 (C342Y) and a second in RNF212 (A77T) are new. Surprisingly, variants previously identified in REC8 were not associated with a QTL detected on BTA10 whereas variants in RNF212B, a paralog of RNF212, showed much stronger association with the phenotype in this region. This suggests that RNF212B might be involved in the recombination process. Most of the identified mutations had significant effects in both genders with three of them accounting each for approximately 10% of the genetic variance in males (the allelic substitution effect being approximately equal to one additional CO per genome). Thus, a large fraction of the genetic variance is associated with missense mutations in genes known to be involved in meiotic recombination. Our results are very different from reports of recombination in other species. For instance, in human, recombination rate is higher in females, distinct variants affect recombination rate in males and females, and the genetic correlation is close to 0, whereas in cattle, we observed a higher recombination rate in males controlled by shared variants effective in both sexes. [less ▲]

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See detailAssociation of Targeted metagenomic analysis and classical microbiology for Clostridium difficile detection and microbial ecosystem mapping of surfaces hands and foodstuffs in a meat processing plant
Rodriguez Diaz, Cristina ULg; Oukbir, Meriem; Taminiau, Bernard ULg et al

Poster (2016, May 11)

INTRODUCTION Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test positive ... [more ▼]

INTRODUCTION Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test positive for the bacterium, it seems plausible that C. difficile could be zoonotic. PURPOSE This study aimed to determine the prevalence and the epidemiology of C. difficile in cattle farms and the possible spread of the bacterium among animals and farmers. METHODS A total of 176 faecal samples of cattle were collected from 5 different Belgian farms. A stool sample of each farmer was also requested. Detection of C. difficile was performed by classical culture on C. difficile selective medium (cycloserine cefoxitin fructose cholate). Isolates were characterised by PCR-ribotyping and Genotype Cdiff test (Hain Lifescience), which allows the detection of all toxin genes, mutations in gyrA gene and the deletion in the regulator gene tcdC. RESULTS C. difficile was detected in 14/178 (7.9%) animal samples. Isolates were grouped into five different types, including PCR-ribotype 015. All of them were identified as toxigenic. In contrast, none of the 5 farmers studied were positive for the bacterium. SIGNIFICANCE Results obtained indicate that PCR-ribotypes commonly isolated from hospitalised patients are also present in cattle, indicating an animal reservoir. However, a zoonotic transmission could be not demonstrated in the farms studied. [less ▲]

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See detailOzone concentration and CO2 flux monitoring in a belgian forest
Hurdebise, Quentin ULg; Bergmans, Benjamin; Aubinet, Marc ULg

Poster (2016, May 11)

Temperate forests, as other ecosystems and oceans, mitigate the accumulation in the atmosphere of CO2, the main responsible for the current climate change. It is, therefore, a necessity to understand how ... [more ▼]

Temperate forests, as other ecosystems and oceans, mitigate the accumulation in the atmosphere of CO2, the main responsible for the current climate change. It is, therefore, a necessity to understand how these forests react and will react in a changing environment. That requires long-term monitoring of the environment. Tropospheric ozone is one parameter to monitor as it affects the forest by inducing oxidative stress once inside the leaves. Using 16 years of continuous data from an air quality monitoring station managed by the ISSeP (Institut Scientifique de Service Public) located in a mixed forest in east Belgium, we identified ozone concentration extreme events and we investigated their occurrence frequency as well as their relation with climatic variables and air components. As variables are subjected to daily, yearly and inter-annual dynamics, anomalies were used to detect extreme events. To obtain anomalies, we removed the previously mentioned dynamics from half-hourly raw data. Daily and yearly dynamics were removed first and explained 40% of the variability observed in half-hourly ozone concentrations. Then, the inter-annual dynamic was obtained by computing the yearly mean of the residuals, it accounted for 2% of the variability observed. A significant (p<0.01) decreasing trend was observed for these residuals. Determining if that trend is site specific or regionally observed can be done by applying the same analysis to the other sites from the network managed by the ISSeP. No significant trend in the yearly frequency and intensity of extreme events was observed. We used a stepwise regression to identify the variables that explain these extreme events. Significant relations were found between ozone concentration and climatic variables (vapor pressure deficit, temperature, radiation and wind direction) as well as other air components concentration (NO2, NO, NOX, CO). The next step will be to estimate the forest capacity to uptake ozone in order to predict ozone-induced damage and compared it to the CO2 uptake and H2O emissions measured in an ICOS site, the Vielsalm Terrestrial Observatory, located in the same forest at less than 300 meters from the air quality monitoring station. [less ▲]

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See detailLes normes étatiques relatives à la modération des rémunérations et le droit de négociation collective
Kéfer, Fabienne ULg

Conference (2016, May 10)

Les récentes lois des 23 et 28 mars 2015 fixant la marge d'évolution du coût salarial et organisant un saut d'index empêchent les partenaires sociaux de fixer librement l'évolution des salaires. Ces lois ... [more ▼]

Les récentes lois des 23 et 28 mars 2015 fixant la marge d'évolution du coût salarial et organisant un saut d'index empêchent les partenaires sociaux de fixer librement l'évolution des salaires. Ces lois sont-elles ou non conformes aux dispositions supralégislatives? [less ▲]

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See detailRéférentiels psychopédagogiques en Belgique francophone: un outil de professionnalisation ?
Pirard, Florence ULg

Conference (2016, May 10)

L'élaboration d'un curriculum pour les services d'accueil des jeunes enfants constitue l'un des leviers pour une qualité de services (OECD 2001, 2006, 2012). Elle pose ensuite la question de l ... [more ▼]

L'élaboration d'un curriculum pour les services d'accueil des jeunes enfants constitue l'un des leviers pour une qualité de services (OECD 2001, 2006, 2012). Elle pose ensuite la question de l'accompagnement de sa diffusion dans une visée de professionnalisation, et non de standardisation. [less ▲]

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See detailImplementing principles of Quality by Design (QbD) in validation context
Hubert, Cédric ULg; Lebrun, Pierre ULg; Rozet, Eric et al

Conference (2016, May 10)

Analytical method performances have to be specified by the analyst trough the definition of the “Analytical Target Profile (ATP)”, as proposed by the regulatory bodies. In the specific context of the ... [more ▼]

Analytical method performances have to be specified by the analyst trough the definition of the “Analytical Target Profile (ATP)”, as proposed by the regulatory bodies. In the specific context of the pharmaceutical industry, regulatory authorities have recently imposed the assessment and management of risk throughout the entire product lifecycle. This includes the analytical procedure and consequently its own lifecycle. The development step of an analytical method is still largely addressed using a “Changing One Separate Factor a Time (COST)” approach (also known as the “Quality-by-Testing (QbT)” approach). This strategy can lead to a suitable method for assessing the risk of routine use, even where the experimental domain is not examined. However, in order to consider an experimental domain rather than a set of specific experimental conditions during the development phase, a multivariate approach must be considered: the “Quality-by-Design (QbD)” strategy. This strategy allows the definition of a “Design Space (DS)” by means of design of experiments (DoE). This DS, computed considering critical method parameters, allows the analyst to focus on the main objective of an analytical method: obtaining reliable results using a robust method. In the course of a specific case study, the benefits of the QbD strategy in terms of managing the qualitative part of the analytical process were highlighted. Working in the context of analytical procedure, the validation step is a major part of the analytical method lifecycle. Indeed, the objective of analytical method validation is to demonstrate that this method is suited for quantifying the target analytes with an established and suitable level of accuracy, as defined by the “ATP”. This is sometimes called the “fit-for-future-purpose” concept. The decision regarding the validity of a method based on prediction can be achieved by using the “β-expectation tolerance interval” (accuracy profile). The capability of this approach to manage the quantitative part of the analytical procedure is nowadays largely illustrated in scientific literatures. Considering the assessment and management of risk throughout the analytical lifecycle, a global strategy allowing the unification of the development and validation phases in a single step was considered. With this innovative approach, a strategy allowing the management of global analytical risk (i.e., for both qualitative and quantitative part of the analytical method) was proposed. Indeed, the developed strategy allows validating an entire experimental domain by means of the accuracy profile rather than a single set of specific experimental conditions. With this strategy, the DS is no longer simply the place where qualitative performances are obtained, but also the space where quantitative performances of the analytical procedure are assessed and managed. [less ▲]

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See detailThe influence of COMT single nucleotide polymorphism (rs4680) on the neural substrates of working memory representations maintenance in healthy aging
Manard, Marine ULg; François, Sarah ULg; Bahri, Mohamed Ali ULg et al

Poster (2016, May 10)

The COMT val108/158met polymorphism was associated to the dopaminergic modulation in the brain, and therefore stimulated research on its influence for cognitive functioning and particularly working memory ... [more ▼]

The COMT val108/158met polymorphism was associated to the dopaminergic modulation in the brain, and therefore stimulated research on its influence for cognitive functioning and particularly working memory. First, a general advantage of carrying the met allele was reported. However, many studies used tasks that did not allow efficiently assessing the contribution of manipulation and maintenance processes in working memory, leading to divergent results, in both young and older populations, resulting in debates about the exact phenotypic effect of the COMT polymorphism. Using fMRI, this study was designed to assess the potential effect of the COMT polymorphism on age-related differences in working memory representations maintenance abilities (Sternberg paradigm). Partial Least Squares method was used to determine the brain-behavior correlations at low, intermediate, and high cognitive demands among young and older groups, homozygous for the val or for the met allele. First, young val/val showed some disadvantages at brain and behavioral level compared to their m/m counterparts. However, in older adults subgroups, the m/m participants tended to show greater age-related difference (when compared to younger adults with similar genotype), suggesting an advantage in carrying the val allele when dopamine signaling is not at optimal efficiency (optimal: young/middle adulthood vs suboptimal: childhood or older ages). These results will be discussed in regard to compensating theories and dopaminergic models accounting for the potential effect of COMT polymorphism on stability/flexibility abilities. [less ▲]

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See detailDe l’usage des « carnets de recherche » accompagnant la parution des revues sur OpenEdition
Mayeur, Ingrid ULg

Conference (2016, May 10)

Les portails de diffusion des revues numériques en sciences humaines permettent la communication d’annonces, billets et actualités lié aux périodiques édités. Ces genres textuels sont soit pris en charge ... [more ▼]

Les portails de diffusion des revues numériques en sciences humaines permettent la communication d’annonces, billets et actualités lié aux périodiques édités. Ces genres textuels sont soit pris en charge par le site même de la revue, soit diffusés sur un blog d’accompagnement – qui peut également jouer un rôle de veille scientifique, de réflexion et d’échange. Dans le cadre de ma recherche doctorale sur les modes de circulation du savoir au sein des plateformes numériques de la recherche en sciences humaines, je voudrais étudier au moyen des outils classiques d’analyse du discours, de l’étude des écrits d’écran et des processus d’éditorialisation les spécificités des textes véhiculés sur ces blogs, et leur complémentarité avec le site de la revue. Comment le portail de diffusion contraint-il la publication de textes liés à la revue? Quels sont les genres textuels mis en œuvre dans l’accompagnement d’un périodique ? De quelle manière l’actualité (annonce de parution, appel à contribution) se voit-elle corrélée au contenu même du périodique ? Mon étude portera essentiellement sur la plateforme OpenEdition, et les carnets de recherche Hypotheses accompagnant une revue en ligne diffusée sur Revues.org. J’observerai aussi, de manière contrastive, la gestion de ces flux d’actualité par un autre portail, Erudit.org. [less ▲]

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See detailEstetrol, a natural SERM exhibiting combined estrogenic and antiestrogenic properties on mammary gland and breast cancer
Gérard, Céline ULg; Gallez, Anne ULg; Blacher, Silvia ULg et al

Conference (2016, May 09)

The increased risk of breast cancer and thromboembolism in women who take Hormone Replacement Therapy (HRT) currently is a major public health problem. The discovery of novel molecules with better safety ... [more ▼]

The increased risk of breast cancer and thromboembolism in women who take Hormone Replacement Therapy (HRT) currently is a major public health problem. The discovery of novel molecules with better safety profile would provide useful advances for patient care. Estretrol (E4) appears as a promising candidate for HRT. Indeed, in contrast to current treatment containing ethinyl estradiol or estradiol (E2), E4 has a minimal impact on liver cells activity supporting a decreased incidence on thromboembolic events. In preclinical studies, E4 has been effective against the main symptoms of menopause such as hot flushes, vaginal atrophy, and osteoporosis, from a starting dose of 0.3 mg/kg/day. The aim of this study was to define the impact of E4 on mammary gland and breast cancer development when it is used at concentrations effective for menopause symptom relief. We report preclinical data showing that E4 is less efficient than E2 to induce mammary gland growth. Treatment of estrogen receptor (ER)-positive breast cancer with several concentrations of E4 has shown that 0.3 mg/kg/day E4 did not increase tumor development. However, at 3mg/kg/day, E4 increased the growth of hormone-dependent tumors and their metastatic dissemination in ovariectomized and intact mice. This effect was similar to the one observed with E2 used at 0.08 mg/kg/day. E4 presents also some anti-estrogenic effects on mammary gland and antitumor activity on breast cancer by decreasing the strong proliferative effect of E2. While ERα is the predominant receptor mediating its effects, the dual weak-estrogenic/anti-estrogenic feature of E4 results from differential signaling pathways activation. Both nuclear and rapid extranuclear signaling pathways are necessary for a complete estrogenic effect of E4. However, the antitumor action of E4 is not due to a capacity to antagonize E2-induced nuclear activity. In conclusion, our results support that E4, if it is used in strictly controlled clinical applications, could have no or only limited impact on breast and breast cancer. [less ▲]

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See detailLes outils géomatiques dans le projet ExTraCar
Cornet, Yves ULg

Conference (2016, May 09)

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See detailINTERNATIONAL AND EUROPEAN SANCTIONS FOR THE TRADE OF DUAL-USE GOODS AND TECHNOLOGIES: A COMPARATIVE OVERVIEW.
Colussi, Ilaria Anna ULg

Conference (2016, May 09)

One of the basic rules in trade law is the freedom of trade. However, such rule encounters some limits when the object of trade is constituted by strategic and sensitive items, among which there are the ... [more ▼]

One of the basic rules in trade law is the freedom of trade. However, such rule encounters some limits when the object of trade is constituted by strategic and sensitive items, among which there are the so-called 'dual-use' goods and technologies. Despite the difficulty to define them, there is a common understanding that they are materials and items normally used for civilian/peaceful purposes but which may also have military application. Because of their 'sensitiveness' and their risk to affect security, health, the environment etc., their trade needs to be controlled. One form of controlling their trade is represented by the imposition of sanctions to be adopted in case of violation of trade rules. In our understanding, there are three categories of sanctions: (a) ‘supranational’ ones, enacted at the international and European Union (EU) level, which are addressing the whole States (‘comprehensive’ sanctions, such as embargoes, boycotts and financial measures), or specific individuals or groups involved in legal activities (‘targeted’ or ‘smart’ sanctions, such as asset freezes and travel bans); (b) ‘implementing’ ones, which are enacted at national level. They consist of administrative, civil or criminal rules implementing legally binding/‘hard law’ supranational rules (i.e., national sanctions for violation of international or regional embargoes or other trade sanctions), and those implementing politically binding or ‘soft law’ rules (i.e., national sanctions for the violation of export control regimes, which are the guidelines for dual-use trade, provided by international forum of countries within the Zangger Committee, the Nuclear Suppliers Group, Australia Group, the Wassenaar Arragement and the Missile Technology Control Regime, and at the EU level through the Regulation 428/2009); and (c) ‘unilateral sanctions’ and ‘countermeasures’, which are National autonomous measures against another State or the single citizens of that State. In this paper, the focus is posed on the first category only. It aims to analyse - with a comparative approach - on the one hand, the types of measures adopted at the level of the United Nations (UN) on the basis of Chapter VII of the UN Charter and through the Security Council resolutions and, on the other one, the restrictive measures introduced within the Common Foreign and Security Policy of the EU. [less ▲]

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See detailHow to specify the environmental footprint of electricity? A methodological approach
Belboom, Sandra ULg; Léonard, Angélique ULg

Conference (2016, May 09)

When assessing the environmental footprint of a product or an industrial process, ma-jor impacts in climate change and resources depletion are usually linked to direct or indi-rect energy consumptions ... [more ▼]

When assessing the environmental footprint of a product or an industrial process, ma-jor impacts in climate change and resources depletion are usually linked to direct or indi-rect energy consumptions. Focusing on electricity generation, largely dispersed results can appear for the concerned impact categories depending on the energy mix taken into account. An accurate knowledge of the mix is of major importance for the prediction of the environmental footprint of electricity. As this mix changes from one country to another and through time, regular update is needed to obtain an accurate value of impact for the studied product. Another criteria to also take into account is the specific technology used to generate electricity depending on the primary energy (gas, coal, uranium, sun, wind, etc.). This study aims to generate a simplified tool, containing sufficient data to assess, within a range of 10 % uncertainty, the value of the environmental footprint of electricity, based on a limited amount of accessible parameters. The global life cycle of electricity generation is taken into account, from the resources extraction to the end-of-life. This is essential to be able to compare, on a same basis, the renewable and classical resources for electricity generation. The functional unit of this study for numerical applications is 1 MWhe. To achieve our goal, the following methodological approach has been pursued. First, the energy mix for electricity generation has been collected trough years for different countries. Then a deeper study of specific technologies relative to each kind of primary energy consumption has been performed. Meta-analyses relative to LCA results have been studied to highlight the main important criteria of these technologies. Then, the amount of needed data for the environmental assessment of these technologies has been reduced to the main important ones. The step further is about the use of these data to obtain an available tool to predict the environmental footprint of electricity depending mainly on the energy mix and used technologies. The environmental impact of 1 MWhe can then be easily calculated using this tool in several categories as climate change, acidification, ozone layer depletion, etc. using the ILCD method. Concerning the resources depletion assessment, all available methodolo-gies have been studied with a specific focus on the CEENE method using an exergetic assessment of resources. This method allows the highlighting of the use of energy and all types of resources (fossil, renewable like wind, sun or land). This perspective can also be used to discriminate several resources for the electricity production. A comparison of the results obtained using resources impact methods has then been performed and some challenges concerning the use of existing impact pathways have been highlighted as well as some perspectives to tackle them. This research has been supported by the Public Service of Wallonia – Department of Energy and Sustainable Building within the framework of the ECEB project [less ▲]

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See detailLife cycle assessment of sound insulation solution made from waste paper
Groslambert, Sylvie ULg; Ernst, Valentin; Léonard, Angélique ULg

Poster (2016, May 09)

Buildings notably contribute to global environmental negative impacts due to con-sumption of both embodied energy and natural resources as well as various emissions during their whole life cycle. It is ... [more ▼]

Buildings notably contribute to global environmental negative impacts due to con-sumption of both embodied energy and natural resources as well as various emissions during their whole life cycle. It is therefore necessary to develop practices to reduce these impacts, mainly by reducing the part of non-renewable resource in material as well as by ensuring the lowest energy consumption possible during their lifetime. For instance, the use of recycled raw materials can lead to significant improvement in building environmental impact. In this context, the Life Cycle in Practice (LCiP) project helps SMEs to reduce the environmental impacts of their products and services across the entire life cycle. Within the frame of this project, Pan-Terre (BE) Acoustix panel impact is evaluated in a cradle-to-gate life cycle assessment (LCA). Evaluation of environmental performance is needed to support both the design and the production of waste based insulation solutions. Manufactured for the last twenty past years, the Acoustix Pan-Terre panel is designed for airborne sound insulation in walls and or floors. This product can only be obtained by mixing in a sensible way two raw materials from cellulose origin, recycled paper and broken shives of flax. Functional unit is 1 m² of panel ready for shipping. Acoustix panels are made by pressing a mix of cellulose from waste paper, flax shives and water. Scraps materials are entirely recycled in the process. Flax cultivation has a favourable impact on the climate change indicator due to carbon dioxide uptake for the photosynthesis occurring during the plant growth. But the drying of the panels is largely contributing to fossil fuel depletion and climate change due to natural gas burners. Life Cycle Assessment of Acoustix sound insulating panels ready to ship highlights some improvements that can be made by optimisation of the drying technology and the (partial) replacement of natural gas burners by alternative fuel burners (such as waste paper and scrap materials). Data are processed in SimaPro 8.1 software, with Ecoinvent 3 and ELCD 3 databases, and analyzed with the CML IA method. This method is compliant with the indicators required by EN15804 standard in order to communicate on the environmental performance of Acoustix panels. [less ▲]

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See detailDepositional Sequences of the Late Pleistocene Shoreline System, Bor Basin, Southern-Central Anatolia: Implications for Reconstructing Lake Level Changes
Bayer Altın, Türkan; El Ouahabi, Meriam ULg; Fagel, Nathalie ULg

Conference (2016, May 08)

The Bor Basin is located in the east part of the Konya-Ereğli Plain occupied by Pleistocene lake (Fig. 1). Paleo-shoreline deposits rising western margins of the basin marked the former extent of a now ... [more ▼]

The Bor Basin is located in the east part of the Konya-Ereğli Plain occupied by Pleistocene lake (Fig. 1). Paleo-shoreline deposits rising western margins of the basin marked the former extent of a now desiccated Late Pleistocene Lake. This study evaluates the former lake level changes and the sequential evolution of a shoreline system that developed at the western margin with lacustrine fills of the Bor paleolake near Zengen settlement. The fills belongs to alluvial fans formed by streams coming from the high volcanic mountains located within the northern part of the basin. The sediment sequence of the fan reflects receded and extended levels of the former lake. 23 samples were obtained at the sand-quarry representing of various facies of the lacustrine fills. These samples were analyzed for mineralogical characterization, using XRD and their CaCO3 values were quantified. According to analysis, three evident different phases of weathering were distinguished in this deposit (Fig. 2). Weathering conditions occurred at the bottom of the profile (level 7) with the appearance of the vermiculite and illite/smectite mixed layer clays. Aridification phases occurred at the level of sample 16 with the appearance of the palygorskite. At the shallow levels from the samples 21 to 22, another aridification phase occurred attested by the appearance of the palygorskite, the mixed layers clays (illite/smectite) and the neoformation of the chlorite by weathering. The palygorskite occurrence showed only in the clay fraction (<2µm) associated with dolomite levels which support its secondary formation during dry periods and pedogenetic transformation. Pedogenesis conditions were attested also by the presence of the mixed layers clays at those levels. [less ▲]

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See detailMeeting in brackets
Thunus, Sophie ULg

Conference (2016, May 06)

In this presentation, I suggest studying "the meetings" for themselves, by considering them as a topic for research and not as tool for doing researches on other topics as problem-solving and policy ... [more ▼]

In this presentation, I suggest studying "the meetings" for themselves, by considering them as a topic for research and not as tool for doing researches on other topics as problem-solving and policy-making. By drawing on a sociological research on a Belgian reform of mental healthcare delivery, I argue that the concept of bracketing might be used to identify the forms and to analyse the various roles played by meetings, or what the meetings do to the organisational and policy work. [less ▲]

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See detailOn the Laser Cladding of Ti Alloy Ti-6Al-4V with Low Laser Power
Mertens, Anne ULg; Paydas, Hakan ULg; Tchuindjang, Jérôme Tchoufack ULg et al

in Ventakesh, V.; Pilchak, A.L.; Allison, J.E. (Eds.) et al Proc. of the 13th World Conference on Titanium (2016, May 06)

Laser cladding is an economic layer-by-layer near-net-shape process for the production and the repair of metallic parts. In this process, a metallic powder is projected onto a substrate while being molten ... [more ▼]

Laser cladding is an economic layer-by-layer near-net-shape process for the production and the repair of metallic parts. In this process, a metallic powder is projected onto a substrate while being molten by a laser beam. Laser sources with fairly high power – i.e. typically 2kW − are often used to ensure short building times and high productivity. However, this approach has limitations. Indeed, it is very difficult to produce thin walls at high laser power. Moreover, an increase of the incident energy may give rise to a relatively coarser microstructure, and this will in turn affect the mechanical properties of the component. In order to address these issues, this paper aims at assessing the potential of a laser source with a lower maximum power of 300W to enhance the flexibility of the process. Two types of samples – i.e. thin walls or bulk deposits − were produced at low laser power from alloy Ti-6Al-4V. Their geometry, microstructures and local hardness are characterised and correlated with the thermal history experienced during fabrication. [less ▲]

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See detailLes types de fief dans la principauté de Liège suivant Charles de Méan
Lagasse, Benoît ULg

Conference (2016, May 06)

La présentation tend à mettre en évidence les différentes catégories de fief existant dans la principauté de Liège suivant le juriste liégeois du 17e siècle Charles de Méan et à comparer les distinctions ... [more ▼]

La présentation tend à mettre en évidence les différentes catégories de fief existant dans la principauté de Liège suivant le juriste liégeois du 17e siècle Charles de Méan et à comparer les distinctions opérées en droit liégeois avec celles faites par d'autres droits de la même époque. [less ▲]

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See detailCatégoriser les effets autodéclarés de la formation technico-pédagogique des enseignants – La grille de codage CInOpTIC
Van de Poël, Jean-François ULg; Verpoorten, Dominique ULg

Conference (2016, May 05)

Cette communication présente une démarche de conception, de validation et d’utilisation d’une grille de codage destinée à aider le centre d’enseignement et d’apprentissage de l’Université de Liège (IFRES ... [more ▼]

Cette communication présente une démarche de conception, de validation et d’utilisation d’une grille de codage destinée à aider le centre d’enseignement et d’apprentissage de l’Université de Liège (IFRES-ULg – Belgique) à repérer les effets des séances de formation technopédagogique qu’il donne à plus de 150 enseignants par an dans le cadre des formations pédagogiques obligatoires pour les nouveaux encadrants. Le matériel qui a servi à cette démarche est constitué des rapports réflexifs rédigés par les participants à la fin de leur cycle de 30 h de formation (plus de 380 rapports ont été analysés sur une période de 3 ans). CInOpTIC est passé par un processus de validation mené avec 6 conseillers pédagogiques de divers horizons. Elle impliquait une série de mouvements de va-et-vient entre les données et les tentatives de catégorisation. L’acronyme CInOpTIC englobe 3 types d’effets trouvés dans les rapports : la prise de Conscience (sensibilisation), l’intention (de l’utilisation de l’apprentissage amélioré par la technologie), et l’opérationnalisation (mesures déjà prises) concernant les TIC. Le processus de validation a également enrichi chaque type d’effet avec des critères de définition plus pointus qui devraient faciliter encore davantage son utilisation future. [less ▲]

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See detailInvestigations around an unrecognized genre: case study on speech captions in private tombs
Motte, Aurore ULg

Conference (2016, May 05)

Since the Old Kingdom, speech captions, generally known as “Reden und Rufe”, are found in the decorative program of private tombs. These captions are dialogs between workers in the “daily life” scenes ... [more ▼]

Since the Old Kingdom, speech captions, generally known as “Reden und Rufe”, are found in the decorative program of private tombs. These captions are dialogs between workers in the “daily life” scenes. They appear in several topics, such as fishing, butchery, crafts, ... Quite surprisingly, they have never been studied exhaustively since their first mention in 1918 in Egyptological literature. My first goal is twofold: to show precisely where and when they are found, and what exactly defines “Reden und Rufe” as a genre. Besides, a chronological scope of nearly 2,300 years allows me to highlight diachronic, diatopic, and diastratic variations. It is particularly evident in New Kingdom and Late Period tombs, where “Égyptien de Tradition” features are found next to “vernacular” ones. It has long been taken for granted, incorrectly, that these speeches were written in an idiom very close to colloquial. This first comprehensive study aims to determine which state(s) of language is/are used. [less ▲]

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See detailConception participative et mise en œuvre d’un curriculum de formation en TICE à destination de futurs enseignants
Denis, Brigitte ULg

Conference (2016, May 05)

En Fédération Wallonie Bruxelles (Belgique), des chercheurs et des professeurs de l’enseignement supérieur titulaires du cours d’intégration des TIC en éducation se sont attelés à la conception ... [more ▼]

En Fédération Wallonie Bruxelles (Belgique), des chercheurs et des professeurs de l’enseignement supérieur titulaires du cours d’intégration des TIC en éducation se sont attelés à la conception participative d’un curriculum de formation en TICE. Destiné à de futurs enseignants (du niveau préscolaire au secondaire), ce curriculum vise à poser des bases communes pour le cours intitulé "Utilisation de l'Ordinateur et Apport des Médias et des TIC en Enseignement" (AMTICE) qui prépare ces enseignants à exploiter les TIC dans leurs pratiques de formation. Les résultats de ce processus de design participatif ainsi que les facteurs facilitateurs et les obstacles relevés dans la mise en œuvre du curriculum AMTICE sur le terrain sont analysés. Des perspectives sont également développées en termes de formation de formateurs (titulaires du cours AMTICE) en vue de les amener à maitriser des compétences TOP (technologiques, organisationnels et pédagogiques) nécessaires pour animer ce cours. Deux exemples de formation continue à destination de ceux-ci sont présentés : d’une part, la participation à des formations, à des séminaires thématiques ou à des journées de partage organisées par le réseau HETICE (Hautes Écoles et Technologies de l’Information et de la Communication pour l’éducation) et, d’autre part, le certificat d’université form@TICEF. [less ▲]

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See detailGender, Jobs and Empowerment in Vietnamese Small Enterprises of Traditional Handicraft: Case Study in the Periphery of Hanoi
Nguyen, Thi Thu Hien ULg; Lebailly, Philippe

in The 2nd World Conference on Women’s Studies WCWS - 2016, 5th – 6th May, 2016 Colombo, Sri Lanka (2016, May 05)

Women are the main workforce of traditional craft sector in Vietnam. They not only actively participate in production, but also succeed in leading enterprises as managers. Even though women contribute ... [more ▼]

Women are the main workforce of traditional craft sector in Vietnam. They not only actively participate in production, but also succeed in leading enterprises as managers. Even though women contribute much to the achievement of companies, they face many constraints in working places due to theories of Confucianism and Buddhism. This research aims at answering two questions: (i) whether or not gender inequality exists in small scale craft enterprises and, (ii) how is empowerment the women employees in the firms. Both qualitative and quantitative methodologies are applied to collect information in order to clarify the research questions. Qualitatively, ethnographic approach is employed. It is explained that since 2014 the researchers go to the study areas to survey employment in the enterprises. In addition, participatory observation and oral history recording were also used to collect information (evidence) of gender inequality in employment and women empowerment in rural companies. Cross checking and supplementing were used for gathering information from communal leaders, women unions’ leaders and local residents. Quantitatively, descriptive statistics were used to analysis labor force, gender and employment of 50 enterprises in 3 traditional artisanal communes in Vietnam to find out gender inequality. Based on the result of analysis, some policy implications will be recommended to empower women as well as to reduce gender inequality in the small enterprises in rural areas [less ▲]

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See detailConclusions du séminaire
Francois, Jeromine ULg; Regibeau, Julien ULg

Conference (2016, May 04)

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See detailCritique des critiques. La crise de la légitimité des journalistes spécialisés en cinéma.
Krywicki, Boris ULg

Conference (2016, May 04)

Bien avant l'avènement d'internet, les critiques cinéma se questionnaient déjà sur la légitimité de leurs jugements. Une table ronde, appelée "Point Critique", s'est interrogée sur leur rôle, la ... [more ▼]

Bien avant l'avènement d'internet, les critiques cinéma se questionnaient déjà sur la légitimité de leurs jugements. Une table ronde, appelée "Point Critique", s'est interrogée sur leur rôle, la pertinence de leur position d'intermédiaire entre distributeurs et spectateurs. A l'ère du numérique, cette crise semble d'autant plus prégnante. Plusieurs circuits fermés de l'évaluation se sont développés sur le web. Les amateurs échangent leurs propres avis en leur sein, affranchis des interventions des critiques professionnelles. Comment la critique de la presse traditionnelle - qui cherche à convaincre le plus de public possible - gère-t-elle cette crise de la légitimité de ses auteurs ? [less ▲]

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See detailFrontières sociales et culturelles dans l’imaginaire du Front national
Debras, François ULg

Conference (2016, May 04)

En luttant contre les bureaucrates et les technocrates de Bruxelles, contre la caste politique nationale, contre la société multiculturelle et l’islamisation de la société, le Front national se présente ... [more ▼]

En luttant contre les bureaucrates et les technocrates de Bruxelles, contre la caste politique nationale, contre la société multiculturelle et l’islamisation de la société, le Front national se présente comme le véritable représentant du peuple français, de ses intérêts mais également de ses valeurs, de ses habitudes et traditions. Dans son « Projet pour la France et les Français », Marine Le Pen souhaite rompre avec le système en place en proposant une alternance démocratique en (re)donnant le pouvoir de décision et d’action au peuple. Aussi, nous nous posons la question suivante : à quel imaginaire renvoie la notion de peuple au sein de la rhétorique frontiste ? Dans quels contextes le peuple est-il invoqué et à quelle réalité fait-il référence ? Quelles sont ses caractéristiques et quels sont ses « ennemis » ? [less ▲]

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See detailUne phénoménologie clinique du Rorschach : des masques et un malentendu
Englebert, Jérôme ULg

Conference (2016, May 04)

Afin d’évoquer la dimension phénoménologique intrinsèque du test de Rorschach, je propose de partir de l’ouvrage magistrale de Roland Kuhn Phénoménologie du masque à travers le test de Rorschach (1957) et ... [more ▼]

Afin d’évoquer la dimension phénoménologique intrinsèque du test de Rorschach, je propose de partir de l’ouvrage magistrale de Roland Kuhn Phénoménologie du masque à travers le test de Rorschach (1957) et des commentaires livrés à son propos par Gaston Bachelard et Jean Starobinski. Ce premier temps me permettra de « démasquer » une épistémologie, œuvrant en sourdine tant dans le test que dans la phénoménologie, celle des visages. Passant ensuite par Foucault – à travers son énigmatique attrait pour le test de Rorschach et sa fascination, toute son œuvre durant, pour les masques – j’interrogerai les notions d’autoréflexion (Foucault, 1966) et d’hyper-réflexivité (Sass, 1994) telles qu’elles se manifestent dans la clinique du patient schizophrène. Le second temps de mon exposé s’intéressera dès lors aux étranges réponses fournies par ces patients au test des taches d’encre lorsqu’ils expriment précisément : « ce ne sont que des taches ». Cette proposition, qui se révèle plus exacte qu’il n’y parait, révèle le malentendu visuel sur lequel repose le Psychodiagnostik de Rorschach. L’observation de ce malentendu nous permettra de conclure que le sujet, lorsqu’il est en « situation Rorschach », doit accepter implicitement le jeu paradoxal consistant à fournir une « fausse perception » et à tolérer un certain degré de violation de la réalité. [less ▲]

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See detailEchographie nerveuse
Kaux, Jean-François ULg

Conference (2016, May 03)

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See detailFirst principles study of heavily doped full Heusler Fe2YZ for high thermoelectric power factor
Lemal, Sébastien ULg; Ghosez, Philippe ULg; Bilc, Daniel ULg

Poster (2016, May 02)

Using a combination of first-principles calculations based on density functional theory and Boltzmann semi-classical transport theory, we investigate the properties of heavily $n$-type doped full Heusler ... [more ▼]

Using a combination of first-principles calculations based on density functional theory and Boltzmann semi-classical transport theory, we investigate the properties of heavily $n$-type doped full Heusler Fe2YZ1-xAx compounds. Using a supercell approach and including explicitly the dopant impurities, we recover in some cases giant thermoelectric power factors as previously predicted under doping within the rigid band approximations [Phys. Rev. Lett. 114, 136601 (2015)]. In other cases, however, we highlight that the system evolves toward a ferromagnetic half-metallic ground state so that the power factor is strongly modified. We rationalize the appearance of this magnetic instability, showing that it consistent with the Stoner model. The uncovered properties of the heavily doped phases of the studied Fe2YZ1-xAx compounds appear promising for Seebeck and spin-Seebeck applications. [less ▲]

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See detailCrystallization behavior of neutralized and bleached shea butter under dynamic conditions
Gibon, V.; Dijckmans, P.; Blecker, Christophe ULg et al

Poster (2016, May 01)

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See detail188Re and 68Ga radiolabeled Starch-Based Microparticles as potential theranostic radiopharmaceutical for Hepatocellular Carcinoma
Verger, Elise ULg; Drion, Pierre ULg; MEFFRE, Geneviève ULg et al

in Journal of Nuclear Medicine (The) (2016, May 01), 57(suppl. 2),

The SBMP as a unique vector is a promising theranostic agent for the SIRT of HCC.

Detailed reference viewed: 46 (10 ULg)
See detailtRNA modification: Elogator sustains Breast cancer metastasis
Delaunay, Sylvain ULg; Rapino, Francesca ULg; Tharun, Lars et al

Conference (2016, May)

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See detailMot de cloture
Mescoli, Elsa ULg; Sarcinelli, Alice ULg

Conference (2016, May)

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See detailMicroplastics contamination in three planktivorous and commercial fish species
Collard, France ULg; Das, Krishna ULg; Gilbert, Bernard ULg et al

Poster (2016, May)

In 2014, 311 million tonnes of plastics were produced worldwide while it is estimated that 10% ended up in the oceans. Plastics adsorb many pollutants, cause entanglements in many vertebrates and provoke ... [more ▼]

In 2014, 311 million tonnes of plastics were produced worldwide while it is estimated that 10% ended up in the oceans. Plastics adsorb many pollutants, cause entanglements in many vertebrates and provoke blockage of the digestive tract of marine mammals, birds and turtles. Plastics also fragment in smaller parts, forming microplastics (<5 mm). These microplastics have the same size than planktonic organisms and can thus be ingested by filter-feeders and planktivorous organisms including fish. Although planktivorous Clupeiforme species are the most fished species in the world (17 million tonnes in 2013), the possible impact of microplastic ingestion on this group has received little attention. The aim of this study was to quantify and to characterize the ingested anthropogenic particles (AP) in herrings (Clupea harengus), sardines (Sardina pilchardus) and anchovies (Engraulis encrasicolus). Twenty individuals of each species were sampled. Herrings and sardines were caught in the Channel and in the North Sea in January 2013 and in January 2014. Anchovies were sampled in July 2013. The stomach contents were digested by sodium hypochlorite to isolate AP and then they were analysed by Raman spectroscopy and measured. AP were constituted of microplastics (MP) and cellulose fibres, sometimes associated with dyes. We found several plastic families: polyethylene (PE), polypropylene (PP), polystyrene, polyacrylonitrile, polyethylene terephthalate, polyamide and poly(butyl methacrylate). MP occurred in 35%, 50% and 40% of stomach contents of anchovies, sardines and herrings, respectively. Anchovies ingested bigger AP (2 mm) than the two other species. MP was in majority PE followed by PP. Our study shows that highly commercial species are exposed to MP. Further research is needed as MP are transport medium for organic pollutants and their fate once in the organism is unknown. [less ▲]

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See detailThat’s embarrassing! Effects of Brand Anthropomorphism on Intimate Disclosure
Gretry, Anaïs ULg; Horváth, Csilla; Belei, Nina

Conference (2016, May)

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See detailQuelle est la place d’internet pour combler le besoin d’information des nouvelles mères ?
Slomian, Justine ULg; Bruyère, Olivier ULg; Reginster, Jean-Yves ULg et al

Poster (2016, May)

Contexte de l’étude : Les femmes autour de la grossesse et de la naissance expriment un besoin d’information. Internet est devenu l’un des moyens les plus importants de s’informer sur sa santé. De ... [more ▼]

Contexte de l’étude : Les femmes autour de la grossesse et de la naissance expriment un besoin d’information. Internet est devenu l’un des moyens les plus importants de s’informer sur sa santé. De nombreuses innovations dans la santé mobile révolutionnent les soins de santé actuels. Ces outils constituent une aide pour les médecins et permettent également de responsabiliser les patients par rapport à leur santé. Objectifs : Le but de cette étude est d’évaluer, chez des femmes francophones ayant des enfants de 0 à 2 ans, utilisant déjà internet, l’intérêt et le degré d’utilisation d’Internet pour des questions relatives à la période postnatale ; que cela concerne leur propre santé où celle de leur enfant. Méthode : Un sondage en ligne a été créé et diffusé largement via les réseaux sociaux. Toutes les femmes comprenant le français pouvait y répondre peu importe leur pays de résidence. Règles éthiques : L’étude a été approuvée par le comité d’éthique hospitalo-facultaire du CHU de Liège sous le numéro : 2013/254. La première page du questionnaire consistait en une explication de l’étude. La participation à l’enquête étant libre, nous avons donc considéré celle-ci comme le consentement du répondant. Résultats : 507 femmes ont répondu à ce sondage (8 femmes ont dû être éliminées de l’échantillon : 6 car le dernier enfant avait minimum 3 ans et 2 parce qu’elles étaient enceintes) : 74,5% des femmes habitaient en Belgique, 23,6% en France et 1,8% de pays divers (Canada, Luxembourg, Burkina Faso, Nouvelle Calédonie, Tunisie). Leur moyenne d’âge était de 30,5 ± 4,25 ans et 54,6% étaient des primipares. Parmi ces femmes, 90,2% ont utilisé internet pour répondre à des questions relatives à la période postnatale concernant leur enfant (82,3%) et/ou leur propre santé (71,3%). Ces femmes recherchent souvent des informations concernant l’allaitement maternel (75,2%), les aliments à introduire dans l’alimentation de l’enfant (62,1%), les dents (48,3%), les pics de croissance de l’enfant (43,4%), les petits boutons que les enfants peuvent présenter (38,2%), leur sexualité (30,7%) ou encore leur perte de poids (24,4%). Elles recherchent également des informations (23,3%) sur des questions plus « ponctuelles » de situation de la vie de tous les jours (ex : douleur de césarienne, sommeil de l’enfant, dépression postnatale, ...). Les raisons de ces recherches sont diverses mais les trois plus courantes sont le fait de vouloir trouver l’information par soi-même (87,3%), trouver des informations sur des symptômes présentés par l’enfant (79,6%) et compléter les informations fournies par un professionnels de la santé (65,2%). La majorité des femmes (90,9%) disent ne pas avoir un site unique de référence et recherche les informations sur différents sites. Beaucoup (81,1%) pensent que les professionnels de santé devraient suggérer des sites internet adaptés aux nouvelles mamans dans lesquels elles pourraient trouver des informations utiles pour leur post-partum et leur enfant. Les informations trouvées sur internet sembleraient avoir influencé la façon dont les femmes pensaient gérer leur enfant dans 51,8% des cas. Malgré qu’elles jugent que les informations qu’elles trouvent sur internet leur sont plutôt utiles (84,3%), elles n’attribuent qu’une note moyenne de 5,28 ± 1,68/10 quant à la qualité des informations qu’elles trouvent sur internet. Conclusion : Il existe un grand besoin d’information durant la période postnatale. Internet semblerait être une solution largement utilisée par les femmes pour combler ce besoin bien qu’elles ne semblent pas toujours satisfaites de la qualité des informations qu’elles y trouvent. Un site internet centralisé et contrôlé pourrait constituer une piste de solution à exploiter. [less ▲]

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See detailStructuration of Robinia pseudoacacia L. genetic diversity in the American natural range and derived Belgian populations
Verdu, Cindy; Daïnou, Kasso; De Thier, Olivier et al

Poster (2016, May)

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See detailFrom Metabolomics to Identification of a new therapeutic approach for Age-Related Macular Degeneration (AMD)
Schoumacher, Matthieu ULg; De Tullio, Pascal ULg; LAMBERT, Vincent ULg et al

Poster (2016, May)

Age-related macular degeneration (AMD) is the leading cause of vision loss in the western world among people aged 50 or older. 90% of all vision loss due to AMD result from the exudative form, which is ... [more ▼]

Age-related macular degeneration (AMD) is the leading cause of vision loss in the western world among people aged 50 or older. 90% of all vision loss due to AMD result from the exudative form, which is characterized by choroidal neovascularization (CNV). Age-related changes that induce pathologic CNV are incompletely understood and critical issues remain to be addressed. Metabolomics is defined as the comprehensive study of endogenous metabolites changes in various biological systems. This newly emerging “omic” science provides a unique opportunity to correlate variation of the metabolome with pathological occurrence or progression and/or to identify metabolites that are implicated in the disease. We apply a 1H NMR metabolomics approach on sera collected from AMD patient and healthy volunteers and form a mice model of laser-induced CNV which mimics the effect of exudative AMD. After post-processing treatments, the different spectra were analyzed by statistical discriminant methodologies (PCA, ICA, PLS-DA, O-PLS-DA). These approaches allow the differentiation between control and AMD patients and between laser-induced mice and the control mice group. Moreover, the same discriminating spectral zones have been identified in human and mice model, leading to the emergence of different putative biomarkers. Among these markers, lactate emerges as a key metabolite in both settings. Mechanistically, lactate produced locally and by inflammatory cells, plays a critical role in the onset of the inflammatory and angiogenic phases. In mice model of laser-induced CNV, normalization of circulating lactate by dichloroacetate a pyruvate dehydrogenase kinase (PDK) inhibitor, decreases CNV development. Our data support the innovative concept of lactate as a parainflammation- and angio-metabolite associated to AMD and CNV progression. Moreover, control of blood lactate level via inhibition of PDK provides new options for the treatment of exudative AMD. This study demonstrates the ability of metabolomics for drug target discovery and opens new perspectives for AMD treatment and patient follow-up. [less ▲]

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See detailFrom Metabolomics Study of Age-Related Macular Degeneration (AMD) to the Development of New Pyruvate Dehydrogenase Kinase Inhibitors (PDK)
Arslan, Deniz ULg; Schoumacher, Matthieu ULg; Pirotte, Bernard ULg et al

Poster (2016, May)

Age-related macular degeneration (AMD) is a leading cause of blindness in the elderly population of industrialized countries. This blindness results from the deterioration of the macula, a small part of ... [more ▼]

Age-related macular degeneration (AMD) is a leading cause of blindness in the elderly population of industrialized countries. This blindness results from the deterioration of the macula, a small part of the retina specialized for the high-acuity vision. Exudative AMD, called “wet”, is characterized by the formation of new blood vessels growing under the retina according to a process named choroidal neovascularization (CNV). Currently, the aetiology and pathogenesis of AMD remain unclear. Nevertheless, a recent metabolomics study performed on the serum of “wet” AMD patients and on a CNV murine model, that mimics the effect of “wet” AMD, have demonstrated that lactate level is clearly involved in the severity of the pathology as well as the relationship between lactate, CNV and AMD. According to this result, we suggest a new therapeutic approach of AMD based on the normalization of blood lactate level. The modulation of the lactate plasma concentration by treatment of the animals with synthetic compounds and more specifically Pyruvate Dehydrogenase Kinase (PDK) inhibitors significantly decrease the CNV. PDK and its four isoforms (PDK1-4) regulate the activity of the pyruvate dehydrogenase complex (PDH), a mitochondrial enzyme that plays a major role in the metabolic pathway of glucose, by reversible phosphorylation. Starting from these results, development of new PDK inhibitors could open the way to innovative treatment opportunities in AMD disease. Different analogues of (R)-3,3,3-trifluoro-2-hydroxy-2-methylpropanamide (fig.1) have been already synthetized and pharmacological evaluation is currently in progress. According to the results obtained, various pharmacomodulations will be investigated [less ▲]

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See detailDealing with crop rotation in agroforestry: the impact of shade on winter wheat and sugar beet growth and yield under belgium conditions
Artru, Sidonie ULg; Garré, Sarah ULg; Hiel, Marie-Pierre ULg et al

in Book of Abstract- 3rd European Agroforestry Conference 2016 (2016, May)

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See detailINFLUENCE OF LOCAL BUCKLING ON THE SHEAR RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
D'Antimo, Marina ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses ... [more ▼]

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses the bearing failure of shear joint using long bolts through thin tubular members with the purpose to check the reliability of Eurocode 3 formulation. The used hollow sections are free to buckle inward leading to a bearing resistance lower than the one predicted using EC3. In fact EC3 does not account for the possible occurrence of out-of-plane deformations in shear connection assuming that the connected plates are restrained by the bolt head and the nut. In order to investigate this phenomenon, an experimental campaign has been developed, a FE model Abaqus/CAE has been validated and a parametric study has been performed. The present paper introduces the conducted investigations. [less ▲]

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See detailQuand les cultures alimentaires se rencontrent. (Re)définition et transmission des pratiques dans un atelier de cuisine arabe en Italie.
Mescoli, Elsa ULg

Conference (2016, May)

Le déplacement des individus est toujours accompagné par le mouvement de choses et pratiques qui voyagent avec eux. Ce fait permet d’étudier la culture matérielle engagée par la mobilité des personnes ... [more ▼]

Le déplacement des individus est toujours accompagné par le mouvement de choses et pratiques qui voyagent avec eux. Ce fait permet d’étudier la culture matérielle engagée par la mobilité des personnes. Cette culture inclut les habitudes alimentaires, qui font l’objet de plusieurs recherches portées sur les changements culinaires (ou les résistances) déterminés par la migration. Loin d’être le seul enjeu constaté lorsque l'on étudie les pratiques alimentaires des migrants – qui par ailleurs sont souvent considérées comme statiques avant la migration –, cette question amène souvent à négliger d'autres dynamiques importantes qui sont également à l’œuvre. Telles que celles qui se produisent lorsque des cultures alimentaires qui se prétendent différentes se rencontrent, ce qui conduit à la mobilisation d’appartenances par les membres de différents groupes culturels qui veulent prendre une position spécifique chacun par rapport à l'autre. Mon exposé vise à analyser cette rencontre. L'hypothèse est qu’elle façonne un espace qui correspond à un tertium quid, une dimension où les frontières des cultures alimentaires peuvent également s’atténuer en raison notamment de la (re)définition et de la transmission des pratiques. Afin de décrire ces dynamiques, je présenterai les données ethnographiques collectées durant un terrain ethnographique porté sur les pratiques culinaires d'un groupe de femmes migrantes marocaines vivant dans la périphérie de Milan, en Italie. Je vais également appuyer ma présentation sur des matériaux visuels recueillis lors des observations et des entretiens dans les maisons ainsi que dans des événements publics tel qu’un cours de cuisine arabe. [less ▲]

Detailed reference viewed: 16 (1 ULg)