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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 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 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 detailLes outils géomatiques dans le projet ExTraCar
Cornet, Yves ULg

Conference (2016, May 09)

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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 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 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 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 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 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 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 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.

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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 detailPermutations and negative beta-shifts
Charlier, Emilie ULg; Steiner, Wolfgang

Conference (2016, May)

Elizalde (2011) characterized which permutations can be obtained by ordering consecutive elements in the trajectories of (positive) beta-transformations and beta-shifts. We prove similar results for ... [more ▼]

Elizalde (2011) characterized which permutations can be obtained by ordering consecutive elements in the trajectories of (positive) beta-transformations and beta-shifts. We prove similar results for negative bases beta. [less ▲]

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See detailEffect of Cooling and Shear Rates on Physicochemical Properties of Binary Fat Blends Based on Shea Stearin
Danthine, Sabine ULg; Delatte, Sophie; Smith, Kevin M. et al

Conference (2016, May)

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See detailUne poétique du visuel. Arlette Farge entre l'image et le texte
Servais, Amandine ULg

Conference (2016, May)

Les interrogations des théories contemporaines sur l’image et le visuel me permettent de comprendre l’agence historiographique de l’image. En mettant au jour l’originalité de la procédure fargienne ainsi ... [more ▼]

Les interrogations des théories contemporaines sur l’image et le visuel me permettent de comprendre l’agence historiographique de l’image. En mettant au jour l’originalité de la procédure fargienne ainsi que les éléments qui, à mes yeux, la caractérisent, il apparaît que l’image, chez Farge, constitue un modèle épistémique ; elle informe la procédure et, de facto, l’écriture historiennes. Partant, et par une sorte d’effet retour, la pratique singulière d’Arlette Farge pose, de manière renouvelée, une question centrale pour les théories du visuel : les rapports entre visible et dicible, entre « logique » de l’image et « logique » langagière, autrement dit entre ce qui échapperait à la narration et ce qui, au contraire, appartiendrait totalement au régime narratif. [less ▲]

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See detailAnalyse des effets des exigences d’accountability sur l’organisation du travail des intermédiaires de l’emploi : mise en perspective de tensions identitaires
Beuker, Laura ULg; Gérard, Julie ULg

Conference (2016, May)

Suite aux nombreux bouleversements économiques et sociaux qui ont touché les pays de l’Union européenne fin des années 1980, d’impérieux besoins de lisibilité et de modernisation des services publics de ... [more ▼]

Suite aux nombreux bouleversements économiques et sociaux qui ont touché les pays de l’Union européenne fin des années 1980, d’impérieux besoins de lisibilité et de modernisation des services publics de l’emploi sont apparus. Ceux-ci doivent dorénavant veiller à la mise en œuvre d’exigences a priori incompatibles telles qu’être efficaces, flexibles et respecter une enveloppe budgétaire, tout en œuvrant à l’inclusion sociale. La mise en œuvre de ces exigences s’inscrit dans la lignée du nouveau management public qui introduit les valeurs et les modes de fonctionnement de la firme privée au sein d’administrations publiques à caractère bureaucratique (Pesqueux, 2006 ; Bezes, 2012). Parmi les services publics de l’emploi belges, cette transformation de l’action publique s’apparente à une décentralisation partielle de leurs ressources et de leurs responsabilités auprès de partenaires privés. Ce nouveau mode d’organisation du travail prend la forme de partenariats publics-privés dont la visée est d’assurer conjointement la réinsertion socioprofessionnelle des demandeurs d’emploi (Aubert et Patry, 2004). Dans leurs activités, tant les services publics de l’emploi que les prestataires privés sont amenés à devoir rendre des comptes sur la réalisation de leurs pratiques. Cette exigence d’accountability comporte un double but : (1) être transparent ; (2) légitimer l’utilisation de l’argent public. Prenant appui sur les apports de la sociologie des groupes professionnels, nous analyserons l’influence des exigences d’accountability sur l’organisation du travail des intermédiaires. Pour ce faire, nous avons réalisé une recherche empirique de nature qualitative (N = 317 observations ; N = 40 entretiens semi-directifs) en Fédération Wallonie-Bruxelles auprès de deux prestataires de l’emploi : un public et un privé. Nous montrerons que le travail relationnel d’accompagnement réalisé par ces deux acteurs est résumé par des chiffres et de la saisie de données, rendant de la sorte invisible leur coeur de métier. Initialement engagés pour réaliser une mission foncièrement relationnelle (à savoir l’accompagnement des demandeurs d’emploi), ils sont désormais contraints par des procédures et mus par une logique d’efficacité. Ce hiatus, entre l’aspect relationnel de la fonction et les exigences d’efficacité concomitantes, se cristallise dans deux tensions identitaires, dont nous rendrons compte. [less ▲]

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See detailFucoidan: a marine polysaccharide for SPECT diagnosis of thrombosis
Chollet, Lucas; Saboural, Pierre; Rouzet, François et al

in Frontiers (2016, May)

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See detailRoof Frames in the Buit Heritage of Brussels (Belgium): The contribution of dendrochronology and written sources
Weitz, Armelle ULg; Charruadas, Paulo; Fraiture, Pascale et al

in Tree Rings in Archaeology, Climatology and Ecology (2016, May), 14

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See detailDerivation of cochlear cells from pathological or isogenic human iPSCs for modeling hereditary hearing loss
Czajkowski, Amandine ULg; Grobarczyk, Benjamin; Hanon, Kevin ULg et al

Poster (2016, May)

Alström Syndrome (AS) is a human autosomal recessive genetic disorder characterized by numerous clinical symptoms including deafness. AS is caused by mutations in the ALMS1 gene encoding for ALMS1 protein ... [more ▼]

Alström Syndrome (AS) is a human autosomal recessive genetic disorder characterized by numerous clinical symptoms including deafness. AS is caused by mutations in the ALMS1 gene encoding for ALMS1 protein expressed at the basal body and implicated in ciliogenesis, cell cycle and proliferation (Jagger et al., 2011; Zulato et al., 2011 & Shenje et al., 2014). We are interesting in understanding the unknown mechanisms involving this protein in the genetic deafness of AS patients. To develop a model as closer as possible to the human pathology, we are using human induced pluripotent stem cells (hiPSCs) generated from fibroblasts of healthy and AS patients. Using a stepwise protocol, we demonstrated that healthy hiPSCs (waiting for isogenic hiPSCs) can generate a population of cells with gene and protein expression patterns consistent with the ones of otic progenitor cells (OSCs). At this differentiation stage, we observed some proliferation and apoptotic defects between healthy and AS cells. When human OSCs are co-cultured with mouse feeder cells, they are able to differentiate into hair cells (HCs). We successfully differentiated AS hiPSCs generated from AS patients into HCs. We are currently confirming gene expression pattern and testing HCs functionality.  To exclude patient linked epigenetics and differentiation defects, we are correcting the genomic mutation in the AS hiPSCs to generate isogenic hiPSCs using the CRIPSR/Cas9 system. Thanks to the isogenic hiPSCs we will be able to confirm that these defects are well due to the ALMS1 mutation. [less ▲]

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See detailDeep Background Subtraction with Scene-Specific Convolutional Neural Networks
Braham, Marc ULg; Van Droogenbroeck, Marc ULg

in International Conference on Systems, Signals and Image Processing, Bratislava 23-25 May 2016 (2016, May)

Background subtraction is usually based on low-level or hand-crafted features such as raw color components, gradients, or local binary patterns. As an improvement, we present a background subtraction ... [more ▼]

Background subtraction is usually based on low-level or hand-crafted features such as raw color components, gradients, or local binary patterns. As an improvement, we present a background subtraction algorithm based on spatial features learned with convolutional neural networks (ConvNets). Our algorithm uses a background model reduced to a single background image and a scene-specific training dataset to feed ConvNets that prove able to learn how to subtract the background from an input image patch. Experiments led on 2014 ChangeDetection.net dataset show that our ConvNet based algorithm at least reproduces the performance of state-of-the-art methods, and that it even outperforms them significantly when scene-specific knowledge is considered. [less ▲]

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

Conference (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 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 detailReal-time capture of the folding-unfolding transitions in a single oligorotaxane foldamer
Sluysmans, Damien ULg; Stoddart, J. Fraser; Duwez, Anne-Sophie ULg

Conference (2016, May)

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See detailMicroparticules à base d’amidon radiomarquées au 188Re et 68Ga comme agent théranostique pour la radiothérapie interne sélective du carcinome hépatocellulaire
Verger, Elise ULg; Drion, Pierre ULg; MEFFRE, Geneviève ULg et al

in 2es Journées Francophones de Médecine Nucléaire (2016, May), 40(3), 182

Les microparticules SBMP, en étant capable d'être radiomarquées rapidement, de manière reproductible, sous forme de kits prêt-à-l‘emploi, par du 188Re et du 68Ga, se révèlent être un outil théranostique ... [more ▼]

Les microparticules SBMP, en étant capable d'être radiomarquées rapidement, de manière reproductible, sous forme de kits prêt-à-l‘emploi, par du 188Re et du 68Ga, se révèlent être un outil théranostique prometteur pour le traitement du carcinome hépatocellulaire. [less ▲]

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See detailMixed Component Oleogels Prepared Using Synergistic Combinations of Monoglyceride and Phytosterols
Sintang, Mohd Dona Bin; Rimaux, Tom; Danthine, Sabine ULg et al

Conference (2016, May)

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See detailCoherent backscattering in the Fock space of Bose- and Fermi-Hubbard systems
Engl, Thomas; Dujardin, Julien; Tisserond, Emilie et al

Poster (2016, May)

Coherent backscattering generally refers to a significant and robust enhancement of the average backscattering probability of a wave within a disordered medium, which from a semiclassical point of view ... [more ▼]

Coherent backscattering generally refers to a significant and robust enhancement of the average backscattering probability of a wave within a disordered medium, which from a semiclassical point of view arises due to the constructive interference between backscattered trajectories and their time-reversed counterparts. We recently investigated the manifestation of this wave interference phenomenon in the Fock space of a disordered Bose-Hubbard system of finite extent [1], which can potentially be realized using ultracold bosonic atoms within optical lattices. Preparing the atoms in a well-defined Fock state of the lattice and letting the system evolve for a finite time will, for suitable parameters of the system and upon some disorder average over random on-site energies of the lattice, generally give rise to an equidistribution of the occupation probability within the energy shell of the Fock space that corresponds to the initial energy of the system, in accordance with the quantum microcanonical ensemble. We find, however, that the initial state is twice as often encountered as other Fock states with comparable total energy, which is a consequence of coherent backscattering [1]. Most recently, we showed that this phenomenon also arises in spin 1/2 Fermi-Hubbard rings that involve Rashba hopping terms (which combine inter-site hoppings with spin flips and arise from spin-orbit coupling), for which a newly developed semiclassical theory [2] correctly predicts a coherent enhancement of the occupation probabilities of the initial state and its spin-flipped counterpart. Moreover, performing a global spin flip within this Fermi-Hubbard system will give rise to significant spin echo peaks on those two Fock states, which is again a consequence of quantum many-body interference [3]. The semiclassical predictions of these enhancements and peaks are found to be in very good agreement with numerical findings obtained from the exact quantum time evolution within this Fermi-Hubbard system. References [1] T. Engl, J. Dujardin, A. Argüelles, P. Schlagheck, K. Richter, and J. D. Urbina, Phys. Rev. Lett. 112, 140403 (2014). [2] T. Engl, P. Plößl, J. D. Urbina, and K. Richter, Theoretical Chemistry Accounts 133, 1563 (2014). [3] T. Engl, J. D. Urbina, and K. Richter, arXiv:1409.5684. [less ▲]

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See detailChitosan-based nanofibers mats for tissue engineering
Aqil, Abdelhafid ULg; Croisier, Florence ULg; Colige, Alain ULg et al

Conference (2016, May)

Polymer hydrogels resemble the natural living tissue due to their high water content and soft consistency. They find many applications in the design and production of contact and intraocular lenses ... [more ▼]

Polymer hydrogels resemble the natural living tissue due to their high water content and soft consistency. They find many applications in the design and production of contact and intraocular lenses, biosensors membranes, matrices for repairing and regenerating a wide diversity of tissues and organs. Polysaccharides such as chitosan and hyaluronic acid based hydrogels have shown a great potential for biomedical and pharmaceutical applications, on account of their remarkable compatibility with physiological medium. Besides, it is degraded in a physiological environment into non-toxic products, which make them outstanding candidates for short- to medium-term applications, especially for tissue engineering. In this respect, the preparation of nanometric fibers mats based on this polysaccharide are highly interesting as such structure mimics the one of skin extracellular matrix. Such nanofibrous materials can be prepared by electrospinning (Figure 1). This technique uses a high voltage to create an electrically charged jet of polymer solution to obtain polymer fibers ranging from nanometers to a few microns in diameter. We thus have investigated strategies allowing to generate chitosan based nanofiber mats exhibiting a mechanical resistance strong enough to be easily handled while keeping the peculiar features of chitosan hydrogels favoring the interaction with cells and soft tissues to provide efficient tissue reconstruction. In a first strategy, polysaccharide-based nanofibers with a multilayered structure were prepared by combining electrospinning (ESP) and layer-by-layer (LBL) deposition techniques. Elastic nanofibers bearing charges at their surface were firstly prepared by electrospinning poly(ε-caprolactone) (PCL) with a polyelectrolyte precursor. After activation by adjusting the pH, the layer-by-layer deposition of chitosan and hyaluronic acid, can be used to coat the electrospun fibers. A multilayered structure is then achieved by alternating the deposition of the positively charged chitosan with the deposition of a negatively charged polyelectrolyte. These novel polysaccharide-coated PCL fiber mats remarkably combine the mechanical resistance typical of the core material (PCL) – particularly in the hydrated state –, with the surface properties of chitosan. Besides, crosslinked nanofibrous mats of chitosan and polyethylene oxide blends, were successfully prepared via electrospinning technique followed by heat mediated chemical crosslinking. This chemical cross-linking allows adjusting the mechanical resistance of the mats while preserving their biocompatibility. In both cases, the control of the nanofiber structure offered by the electrospinning technology, makes the developed processes very promising to precisely design biomaterials for tissue engineering. Preliminary cell culture tests corroborate the potential use of such systems in wound healing applications. [less ▲]

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See detailAnalysis of the flexibility of Belgian residential buildings equipped with Heat Pumps and Thermal Energy Storages
Georges, Emeline ULg; Garsoux, Pierre; Masy, Gabrielle et al

in Proceedings of CLIMA2016 Conference (2016, May)

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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 detailThe Dark Side of Customer Participation: The Antecedents of Customer Participation Stress
Treger, Stephanie; Büttgen, Marion; Schumann, Jan Hendrik et al

Conference (2016, May)

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See detailElectromagnetic Investigation of the Pb-Zn deposit of Lontzen, Belgium
Evrard, Maxime ULg; Pirard, Eric ULg; Nguyen, Frédéric ULg

in First International Conference: MINING IN EUROPE, ABTSRACT volume (2016, May)

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See detailGenetic predisposition to breast cancer occurring in a male-to-female transsexual patient
Potorac, Iulia ULg; CORMAN, Vinciane ULg; Manto, Florence et al

Poster (2016, May)

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See detailDélinquance et désistance : quelle méthodologie de recherche ?
Puglia, Rosa ULg; Glowacz, Fabienne ULg

Conference (2016, May)

Dans la littérature concernant la délinquance, les auteurs se sont, au départ, principalement intéressés aux raisons qui poussent les individus à commettre des délits mais peu ont tenté de comprendre ... [more ▼]

Dans la littérature concernant la délinquance, les auteurs se sont, au départ, principalement intéressés aux raisons qui poussent les individus à commettre des délits mais peu ont tenté de comprendre pourquoi et comment certains individus, qui ont commis des actes délictueux, sortent de la délinquance. En effet, la désistance, c’est-à-dire le processus de sortie de la délinquance, a longtemps été négligée par les chercheurs. À partir des années '50, un intérêt croissant pour ce domaine de recherche apparaît. La désistance devient alors un sujet d’étude indépendant et non plus un appendice de la recherche sur les carrières délinquantes (Mohammed, 2012). Malgré l’intérêt croissant pour ce champ de recherche, de nombreuses zones d’ombre persistent. Sur base d’une recherche longitudinale réalisée sur une population d’adultes en émergence délinquants (17-25ans), nous tentons d’avoir une approche holistique de la désistance. Celle-ci est définie ici comme un processus impliquant des changements individuels et sociaux, qui s’inscrit dans le temps et qui peut être marqué par des réitérations d’actes délinquants. Dans notre étude, la désistance sera étudiée à travers une approche mixte combinant un récit de vie et des questionnaires. L’approche narrative est essentielle dans notre recherche, elle permettra d’appréhender les transformations identitaires, les schémas de changement et de stabilité dans le parcours de vie et dans la trajectoire délinquante. Elle permettra également de mettre en avant les facteurs internes et externes identifiés comme des facteurs de désistance. Par ailleurs, comme Maruna (2001), nous posons l’hypothèse que les persistants et les désistants sont des individus similaires qui se trouvent à des stades différents du processus de changement. C’est pourquoi, en toile de fond, la désistance sera envisagée à travers le modèle transthéorique de Proshaska et DiClemente (1982) où différentes étapes se succèdent avant l’arrêt du comportement problématique. [less ▲]

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See detailHow Service Managers Can Shape Frontline Employees' Organizational Values to Reduce Person-Role Conflicts
Selzer, Veronika Luisa; Schumann, Jan Hendrik; Büttgen, Marion et al

Conference (2016, May)

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See detailComparison of 3 Diffractive IOLs in 3 Wavelengths Bifocal/ EDOF/Trifocal.
Gatinel, Damien; Pagnoulle, Christophe; Loicq, Jerôme ULg et al

Conference (2016, May)

Purpose To describe the optical performances of 3 types of diffractive hydrophobic intraocular lenses (IOLs): monofocal achromatic, bifocal and trifocal, using various visible wavelengths. Methods 3 IOLs ... [more ▼]

Purpose To describe the optical performances of 3 types of diffractive hydrophobic intraocular lenses (IOLs): monofocal achromatic, bifocal and trifocal, using various visible wavelengths. Methods 3 IOLs were measured with an optical bench (PMTF,LambdaX,Nivelles, Belgium) to determine modulation transfer function (MTF) and point spread function (PSF). Measurements were performed at 480 nm,546 nm,650 nm using an aberration free cornea and aspheric artificial cornea generating +0.28µm positive spherical aberration by ISO11979-2 guidelines. Through-focus MTF was recorded for various pupil apertures. Evaluation of halos was performed from PSF measurements obtained at each focal spot location. Images of USAF targets were recorded with simulated distances from 1m to 25cm. Amplitude of off-axis peaks of radial profile of PSF enabled to quantify percentage of energy within the halos. Results The monofocal and the bifocal IOLs presented 2 peaks on the through-focus MTF in green light: intermediate vision (at +1.75D) for the monofocal achromatic lens, and far and near vision (at +4D) for the bifocal IOL of the same material. Three peaks (Distance, Intermediate at +1.75D, Near at +3.5D) were recorded with the trifocal IOL at any wavelength. The achromatic monofocal IOL was monofocal for far vision with red light and monofocal for near vision with blue light. The influence of the cornea models was limited. The amount of halos were comparable between lenses (3 to 5 % of the enclosed central light energy). Conclusion The achromatic diffractive IOL behaved like a bifocal IOL with an intermediate addition foci in green light. The bifocal and trifocal IOL induced similar chromatic effects for the near (bifocal, trifocal) and intermediate (trifocal) foci. [less ▲]

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See detailInflammation et alimentation: des pistes intéressantes
Knapp, Emilie ULg; Guyot, Hugues ULg

in SNGTV (Ed.) Journées Nationales des GTV: Nutrition et pratique vétérinaire, du b.a.-ba à l'innonvation (2016, May)

Les processus inflammatoires sont déclenchés lors d'une agression et font partie intégrante du système immunitaire. La problématique réside lorsque ces processus inflammatoires ne sont plus contrôlés et ... [more ▼]

Les processus inflammatoires sont déclenchés lors d'une agression et font partie intégrante du système immunitaire. La problématique réside lorsque ces processus inflammatoires ne sont plus contrôlés et provoquent plus de lésions que l'agression elle-même. Cette inadéquation des réactions inflammatoires aggravent souvent des pathologies comme les mammites, les métrites ou les pathologies métaboliques. La quantité et la qualité de l'alimentation, ainsi que le statut métabolique sont des points majeurs de régulation du système inflammatoire. En effet, de nombreuses molécules intervenant dans l'inflammation sont des protéines synthétisées par le foie ou sont dérivés des acides gras alimentaires. En début de lactation, la mobilisation graisseuse et les corps cétoniques ont une action directe sur l'activité inflammatoire ce qui expliquent l'état de stress oxydatif, la chute d'immunité ainsi que l'état pro-inflammatoire des vaches en post-partum. La digestion ruminale et intestinale des hydrates de carbone et des protéines peuvent également provoquer et réguler l'état inflammatoire systémique du ruminant. L'acidose chronique en est un exemple, cependant, l'alcalose et la mal-digestion des fibres peuvent également provoquer de l'inflammation. En pratique, il existe des paramètres qui permettent d'évaluer l'inflammation d'un animal et d'un troupeau. A l'aide d'une prise de sang et de dosage des protéines totales plasmatiques et sériques on pourra facilement et à des coûts limités, mesurer la présence d'inflammation aiguë ou chronique. La présence d'inflammation chronique est un facteur de risque sous-jacent important dans nos troupeaux de vaches laitières puisqu'il concerne environ 25% des troupeaux qui ont présenté des problèmes de défaut d’efficience alimentaire. Dans les troupeaux avec des signes cliniques de type amaigrissement, sous-production, mal-digestion des fibres et inflammation chronique, l'acidose chronique n'a été diagnostiquée que sur 5% des vaches alors que l'inactivité ruminale a été montrée sur 40% des animaux. Cette inactivité est souvent liée à un déficit en matière organique fermentescible couplée avec un excès de protéines fermentescible ce qui entraine des pH élevés et diminue la multiplication de la flore du rumen. L'analyse du jus de rumen, couplée avec celle des protéines totales permet dans la plupart des cas de poser un diagnostic et de discriminer les cas de SARA des cas de maldigestion et adapter correctement la ration. [less ▲]

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See detailEn quoi l'ajout d'un élément de gamification (badges) impacte la réalisation des tests d'entraînement ?
Marique, Pierre-Xavier ULg; Van de Poël, Jean-François ULg; Hoebeke, Maryse ULg

Conference (2016, May)

Le département de physique de l’Université de Liège a développé un outil de soutien à l’apprentissage pour le cours de physique à destination des étudiants inscrits en première année de médecine. Le choix ... [more ▼]

Le département de physique de l’Université de Liège a développé un outil de soutien à l’apprentissage pour le cours de physique à destination des étudiants inscrits en première année de médecine. Le choix s’est porté sur une plateforme en ligne afin qu’elle soit accessible à chaque instant et de n’importe quel endroit, moyennant une connexion internet. L’étudiant, interrogé sous forme de questions à choix multiples, peut notamment utiliser un simulateur d’examens. Il peut à tout moment générer un test selon trois paramètres : la ou les matières qu’il souhaite travailler, le temps qu’il désire y consacrer et le niveau de maitrise qu’il souhaite atteindre. Dès lors, un test d’entrainement est généré automatiquement selon les critères choisis. L’étudiant peut visualiser son état d’avancement dans la matière grâce à une série de badges qu’il est invité à collecter. Une fois certains badges acquis, l’apprenant a la possibilité de télécharger un « pass » personnel lui donnant accès à une séance de simulation d’examen organisée en amphithéâtre. Cette étude présentera les premiers résultats de cette expérimentation. La corrélation avec les notes obtenues à l’examen ainsi que l’impact de la mise en place des badges dans le dispositif d’un point de vue motivationnel seront étudiés. [less ▲]

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See detailModelling and Emulation of an Unbalanced LV Feeder with Photovoltaic Inverters
López-Erauskin, Ramón; Gyselinck, Johan; Olivier, Frédéric ULg et al

in Proc. of 8th IEEE Benelux Young researchers symposium in Electrical Power Engineering (2016, May)

In this paper, the penetration of grid-connected pho- tovoltaic systems is studied, experimentally tested and compared to simulation results. In particular, how the inverse current flow and unbalance ... [more ▼]

In this paper, the penetration of grid-connected pho- tovoltaic systems is studied, experimentally tested and compared to simulation results. In particular, how the inverse current flow and unbalance situations affect the voltage in the low-voltage grid. Thus, a test platform has been developed for obtaining experimental results with grid-tied commercial inverters. Photo- voltaic arrays are emulated and subjected to different irradiance profiles and the inverters are controlled to produce at different power conditions. A model has been developed in order to repro- duce the same operating conditions and working environment. Simulations are performed with the software PowerFactory and the results compared to the experimental ones. [less ▲]

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See detailInteraction entre la zone endommagée autour d’un tunnel et son soutènement – Simulation numérique
Charlier, Robert ULg; Sillen, Xavier; Li, Xiangling et al

Conference (2016, May)

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See detailL’accompagnement des demandeurs d’emploi par les intermédiaires du marché du travail : une triple opération de sélection
Gérard, Julie ULg; Beuker, Laura ULg

Conference (2016, May)

En 1997, la Convention 181 de l’Organisation internationale du travail sonne le glas du monopole public en matière de placement. Elle invite les services publics de l’emploi et les opérateurs privés à ... [more ▼]

En 1997, la Convention 181 de l’Organisation internationale du travail sonne le glas du monopole public en matière de placement. Elle invite les services publics de l’emploi et les opérateurs privés à collaborer pour fournir un accompagnement plus efficace aux demandeurs d’emploi. Cette collaboration s’inscrit dans le cadre d’une entente contractuelle où les services de l’emploi confient l’exploitation et la gestion de certaines de leurs activités à des prestataires privés au sein de partenariats publicsprivés. Qu’il s’agisse des services publics de l’emploi ou des prestataires privés, tous deux ont pour mission d’assurer l’insertion socioprofessionnelle des demandeurs d’emploi en tant que généralistes, ou spécialistes de l’employabilité. Elle s’inscrit dans la stratégie d’EU2020 et contribue à l’atteinte d’un taux d’emploi de 73,2% pour 2020. À l’aide de trois études de cas réalisées auprès du service public wallon et de deux prestataires privés exerçant en Région wallonne, nous démontrerons que cette mission d’accompagnement s’exerce au prix d’une triple sélection : une première réalisée par le politique, via la définition de publics cibles prioritaires ; une seconde opérée par les agents du service public dans leurs pratiques professionnelles d’accompagnement ; une troisième effectuée par les prestataires privés en fonction de critères objectifs et/ou subjectifs. Pour étudier la mise en oeuvre et l’effet de ces opérations de tri, nous nous inscrirons dans une approche pragmatique. Appuyé sur une étude empirique constituée d’entretiens semi-directifs (N = 45), d’observations d’interactions (N = 149) et de discussions informelles, nous montrerons les conséquences globales de ces tris pour les demandeurs d’emploi. En ne sélectionnant que les plus employables des inemployables, l’opération d’accompagnement ne serait-elle finalement qu’une agitation, et non pas une véritable mise à l’emploi ? [less ▲]

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See detailNo evidence for genetic differentiation between French and Belgian populations of the exotic tree Robinia pseudoacacia
Bouteiller, Xavier; Aikio, E; Raimbault, A et al

Poster (2016, May)

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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 detailPRODUCTION OF BIOFUELS AND BIOBASED COMPOUNDS IN URBAN BIOREFINERIES: A STRATEGY TO MANAGE WASTE IN WALLONIA?
Richel, Aurore ULg; Haubruge, Eric ULg; Jacquet, Nicolas ULg

Conference (2016, May)

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for ... [more ▼]

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for the production of an array of biofuels and bioproducts. This “urban biorefining” concept fits particularly with the economic, geographic and politic contexts and constraints of the Walloon Region (south part of Belgium). Indeed, Walloon Region is a very small territory (area of about 6,504 sq mi) with a temperate climate. Supply feedstock, mainly arising form forestry and agriculture, are thus rather restricted, submitted to importation, and subjected to non-standardized quality. Several examples of our regional strategy, still available on an industrial scale, are herein proposed and detailed. [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 ▲]

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See detailDétection de la mémoire ischémique myocardique par le 99mTc-fucoïdane : validation pré-clinique.
Mikail, N; Louedec, L; Aid, R et al

Conference (2016, May)

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See detailTowards an Novel Stiff String Model for the Torque and Drag Problem
Huynen, Alexandre ULg

Conference (2016, May)

The petroleum industry relies on several kilometer long drillstrings to transmit the axial force and torque necessary to drill the rock formations and reach deep hydrocarbon reservoirs. The assessment of ... [more ▼]

The petroleum industry relies on several kilometer long drillstrings to transmit the axial force and torque necessary to drill the rock formations and reach deep hydrocarbon reservoirs. The assessment of the energy loss along the drillstring, known as the torque and drag problem, plays an essential role in well planning and drilling as the friction appearing at the contacts between the drillstring and the borehole may dramatically increase the costs or, even, be a limiting factor in some configurations. The identification of the number of contacts as well as their positions and extents constitutes the central concern of this question. The nonlinearities associated with the large deflection of the drillstring and the non-penetration condition as well as the a priori unknown number of contacts, however, make the use of conventional numerical tools rather inefficient. To circumvent these difficulties, a simplified stiff string model is derived. Partitioning the global problem in segments of drillstring either in continuous contact with the borehole or free of contact between their extremities, the originality of the proposed formulation lies in the descripion of the drillstring deflection as perturbation of the well-path. [less ▲]

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See detailANALYTICAL PREDICTION OF THE BEARING RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
Armenante, Vittorio; D'Antimo, Marina ULg; Demonceau, Jean-François ULg et al

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

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research ... [more ▼]

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research is motivated by the fact that the rules currently provided by EC3 for defining the bearing resistance of steel connections are limited to the case of stacks of plates, where every plate composing the connection is always restrained out of plane by the adjoining plate or by the bolt head or nut. This is a condition not verified in case of connections realized with long bolts fastening hollow sections. The work is organized in two sections. First, the results of an experimental campaign are presented and successively, the results of a parametric analysis carried out by means of a Finite Element model calibrated on the experimental data are reported. Afterwards, an analytical approach able to include the local buckling effects arising in these kinds of connections is presented, proposing a coefficient for the reduction of the resistance, to be included in the EC3 formulation. [less ▲]

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See detailAre crop models able to efficiently simulate crop growth under shade?
Artru, Sidonie ULg; Dumont, Benjamin ULg; Lassois, Ludivine ULg et al

in Gosme, Marie (Ed.) 3rd European Agroforestry conference 2016 - Book of abstracts (2016, May)

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See detailEnergy Reduction in Public Building Stock: Assessing the Impact of Control Strategy over Expected Energy Savings and Indoor Comfort Level
Ruiz Flores, Roberto ULg; D’Antoni, Matteo; Lemort, Vincent ULg

in CLIMA 2016 - proceedings of the 12th REHVA World Congress: volume 1. Aalborg: Aalborg University, Department of Civil Engineering. (2016, May)

In the framework of EU FP7 BRICKER project, the renovation of public owned nonresidential buildings is addressed through the installation of innovative passive and active technologies. The expected impact ... [more ▼]

In the framework of EU FP7 BRICKER project, the renovation of public owned nonresidential buildings is addressed through the installation of innovative passive and active technologies. The expected impact is a primary energy reduction of about 50% with respect to the existing scenario with a large replication potential under different European countries. In order to achieve such ambitious goal one issue that cannot be ignored is the effect of control strategy, not only over the resulting energy performance but also over the resulting indoor comfort conditions. In this paper, the actual control strategy implemented in the Belgian demo of Bricker project is introduced, compared against an ideal approach and accordingly optimized. The resulting proposed approach is then tested by means of numerical simulations over a base case scenario before renovation. The main conclusion of this work is the demonstration that control strategy of energy generation and distribution systems has to be revised whenever deep renovation of passive or active building technologies is undertaken. Contrarily to which, project renovation goals cannot be met. [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 detailJeunes fugueurs en Belgique : Indicateurs de risque et de protection dans les signalements
Courtain, Audrey ULg; Glowacz, Fabienne ULg

Conference (2016, May)

Chaque année, 1% des foyers européens vit la fugue d’un de ses membres de moins de 18 ans. Au 2 janvier 2014, plus de onze mille jeunes français étaient recherchés comme fugueurs ; avec près de 50.000 ... [more ▼]

Chaque année, 1% des foyers européens vit la fugue d’un de ses membres de moins de 18 ans. Au 2 janvier 2014, plus de onze mille jeunes français étaient recherchés comme fugueurs ; avec près de 50.000 fugues de mineurs français par an. En Belgique, sur les années 2013-2014, l’organisme Child Focus s’est vu confier près de 1700 dossiers de fugues de mineurs. Child Focus - Fondation pour Enfants Disparus et Sexuellement Exploités – a été créée à la suite de l’affaire Dutroux, et traite des dossiers de disparitions de mineurs (enlèvements par un tiers, enlèvements parentaux, fugues) et d’exploitation sexuelle de mineurs. Généralement contacté par la famille du jeune ou par la police, Child Focus ne peut ouvrir un dossier de fugue qu’à la suite d’un procès-verbal. Les dossiers de fugues de mineurs ouverts auprès de Child Focus constitueraient un cinquième des fugues enregistrées par la police belge. Ces dossiers, de par leur contenu, permettent d’envisager trois axes de recherche. Le premier axe porte sur le profil des jeunes signalés en fugue (âge, sexe, contexte familial, scolarité,…). Le second axe porte sur le profil du signalant (père, mère, famille élargie, police,…). Le troisième axe porte sur les indicateurs de risque et de protection que les signalants expriment auprès de Child Focus lorsqu’ils évoquent le jeune en fugue (consommation de drogue, délinquance, santé mentale,…). Ces trois axes sont étudiés à partir de deux recherches empiriques, la première portant sur les 1700 dossiers des années 2013-2014, et la seconde portant sur 200 de ces dossiers, dont nous donnerons les résultats préliminaires. Enfin, par ces recherches, nous proposons d’évaluer la portée des filtres et de la black box permettant de comprendre comment et pourquoi certains cas de fugue sont davantage susceptibles d’être confiés à Child Focus que d’autres. [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 detailAfrique des Grands lacs, à la croisée des chemins.
Kabamba, Bob ULg

Conference (2016, May)

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See detailBinary Phase Behavior of tripalmitoylglycerol and 1,3-dipalmitoyl-2-stearoyl-sn-glycerol
Bhaggan, K.; Smith, K. W.; Blecker, Christophe ULg et al

Poster (2016, May)

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See detailElucidating diversity of thin filamentous mat-forming Antarctic cyanobacteria
Lara, Yannick ULg; Durieu, Benoit ULg; Deblander, Victor ULg et al

Poster (2016, April 29)

Freshwater ecosystems range from glacial cryoecosystems, ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the biomass. In ... [more ▼]

Freshwater ecosystems range from glacial cryoecosystems, ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the biomass. In these mats, cyanobacteria form matrices that shelter other organisms, and carry out the primary production. Narrow filamentous cyanobacteria belonging to the genera Leptolyngbya and Phormidium are especially abundant in Antarctic microbial mats and are essential for the formation of matrix. However, the lack of morphological criteria and the small cell size of cyanobacteria belonging to these two genera make their identification problematic. Indeed, they are known as polyphyletic taxa according to botanical and bacteriological criteria. The characterization of strains is the first step for an assessment of the real diversity and for understanding their role in the environment. We designed a polyphasic approach that combines molecular analyses, environmental physiology experiments and microscopic observations. Briefly, we amplified and sequenced three loci (16S rRNA, ITS, and rpoC1) for 31 strains of Leptolyngbya and Phormidium. We performed whole genome sequencing for five strains. Cultures at different stage were observed by light and epifluorescence microscopy. Finally, selected strains were grown in nitrogen-limited. The Leptolyngbya and Phormidium strains were distributed into four lineages. Phylogenetic trees supported the distribution of P. priestleyi strains into at least two potentially new lineages, and L. antarctica strains were separated into one endemic and one cosmopolitan lineage. This was supported by the microscopic observations of 1-year old cultures. Genome analyses revealed the presence of sequences related to the production of secondary metabolites in strains from two of the studied lineages. Secondary metabolites are often known for their antimicrobial activities. Such properties would partly explain how cyanobacterial mats survive to predation and degradation by other bacteria. This work provides the first building block to the understanding of survival strategies developed by mat-forming cyanobacteria and how they succeeded as the most abundant phototrophs on the Antarctic continent. This work was realized in the frame of the BelSPo project CCAMBIO. [less ▲]

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See detailCognition et imagination. Réflexions à partir de Mach, Musil et Wittgenstein
Zincq, Aurélien ULg

Conference (2016, April 29)

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See detailLe droit du travail (re)visité par la Cour constitutionnelle
Kéfer, Fabienne ULg

in Boufflette, Sophie (Ed.) La cour constitutionnelle. De l'art de modeler de droit pour préserver l'égalité (2016, April 29)

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de ... [more ▼]

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de redessiner – les contours de cette branche du droit fortement marquée par son histoire. Elle se penche sur un peu plus de trente arrêts prononcés par la Cour constitutionnelle, principalement depuis 2008, dans les domaines suivants : le travail à temps partiel (chapitre 1), le droit de la non-discrimination (chapitre 2), certaines questions intéressant le licenciement, à savoir la durée du préavis, les mesures destinées à stimuler l’employabilité, la motivation, la notion de rémunération en cours en cas de réduction temporaire des prestations de travail, et l’indemnité d’éviction du représentant de commerce (chapitres 3 à 7), les distinctions entre employés et ouvriers autres que les conditions de licenciement (chapitre 8), la procédure de réorganisation judiciaire (chapitre 9) et la prescription (chapitre 10). [less ▲]

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See detailThe CCAMBIO project to characterize the biodiversity and distribution of microorganisms in microbial mats of Antarctic lakes
Durieu, Benoit ULg; Lara, Yannick ULg; Obbels, Dagmar et al

Poster (2016, April 29)

The BelSPO project CCAMBIO aims to study the biogeographical distribution of microorganisms in lacustrine microbial mats using a combination of techniques including microscopical observations (light and ... [more ▼]

The BelSPO project CCAMBIO aims to study the biogeographical distribution of microorganisms in lacustrine microbial mats using a combination of techniques including microscopical observations (light and electronic microscopy), strain isolation, and molecular diversity assessment using Next Generation Sequencing. The samples were collected in different Antarctic and sub-Antarctic biogeographical regions. A detailed microscopic study of the Antarctic diatom diversity allowed to revise a number of taxa and discover new ones. A multivariate analysis of diatoms showed that these regions hosted different diatom flora. Endemic diatom taxa were also observed, and a multigene molecular phylogeny of Pinnularia borealis showed a high genetic diversity. Pilot studies were conducted for the microeukaryotes and cyanobacteria to select NGS protocols and bioinformatic pipelines. Preliminary multivariate analysis of over 100 samples revealed that distinct biogeographic zones could be recognized in both the prokaryote and eukaryote data, which is in agreement with the classical subdivision of the Antarctic Realm into Maritime Antarctica, Continental Antarctica and the Sub-Antarctic Islands generally observed in plants and animals. Moreover, Sub-Antarctic assemblages harboured more complex foodwebs, with quite diverse metazoan groups. Lakes on the continent, however, were characterised by fewer metazoan groups and a greater importance of microbial herbivores and secondary consumers, including a relative high diversity of ciliates and tardigrades. Variation partitioning analysis revealed that spatial variables that approximated large-scale regional contrasts in historical (e.g. deglaciation history, geological origin) and climatic factors (e.g. mean annual air temperature) significantly explained the largest portion of the observed variation in community structure for eukaryotes, while in the prokaryote data environmental gradients related to conductivity were more important. In a first analysis of microbial mats from five Antarctic lakes and an aquatic biofilm from the Sub-Antarctic, the majority of the cyanobacterial OTUs retrieved were related to filamentous taxa such as Leptolyngbya and Phormidium, which are common genera in Antarctic lacustrine microbial mats. However, other phylotypes related to different taxa such as Geitlerinema, Pseudanabaena, Synechococcus, Chamaesiphon, Calothrix and Coleodesmium were also found. Results revealed a higher diversity than what had been reported using traditional methods based on microscopic observations and cultivation and also highlighted remarkable differences between the cyanobacterial communities of the studied lakes. In the next months, the molecular diversity data will be deposited into the “Microbial Antarctic Resource System (MARS)” presently developed into the webportal ‘biodiversity.aq’. The better knowledge of the diversity and distribution of microorganisms will contribute to a better assessment of their resilience and local/regional responses to global change. [less ▲]

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See detailPhysical activity: an unknown concept
Cloes, Marc ULg

Conference (2016, April 29)

Physical educators do not have necesseraly good representations about physical activity and sedentariness. During the presentation, participants will be involved in an interactive process aiming to ... [more ▼]

Physical educators do not have necesseraly good representations about physical activity and sedentariness. During the presentation, participants will be involved in an interactive process aiming to underline the main concepts that they should use in order to become effective agents of physical activity promotion. [less ▲]

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See detailLa critique génétique dans la collection "Poétique"
Lorent, Fanny ULg

Conference (2016, April 29)

La critique génétique est, comme le dit bien Jean-Louis Jeannelle, une « théorie en quête d’elle-même » , tiraillée entre la tradition philologique et les avancées structuralistes. Elle doit sans cesse, à ... [more ▼]

La critique génétique est, comme le dit bien Jean-Louis Jeannelle, une « théorie en quête d’elle-même » , tiraillée entre la tradition philologique et les avancées structuralistes. Elle doit sans cesse, à la fois, se défaire des suspicions positivistes qui pèsent sur elle et justifier son appartenance possible à la (une ?) poétique . Nous voudrions étudier, dans cette communication, les mécanismes de légitimation de cette discipline aux contours épistémologiques complexes au sein même de la collection « Poétique », qui accueillit, en 1998, Les brouillons de soi de Philippe Lejeune et, en 2011, Logiques du brouillon de Daniel Ferrer. Comment les auteurs vont-ils, dans leur ouvrage, justifier leur parution au sein d’une collection dont les présupposés théoriques semblent, a priori, contraires à ceux présidant à leur travail ? Quelles en sont alors les implications méthodologiques, pour chacune des deux disciplines ? [less ▲]

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See detailUse of stable isotope ratios to delineate coastal benthic food web structure in Adélie Land (East Antarctica)
Michel, Loïc ULg; Dubois, Philippe; Eleaume, Marc et al

Poster (2016, April 29)

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice ... [more ▼]

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice cover decrease, in some parts of East Antarctica sea ice cover tends to increase, possibly in relation with changes in atmospheric circulation. Changes in sea ice cover are likely to influence benthic food web structure through modifications of benthic-pelagic coupling, disruption of benthic production and/or modifications of benthic community structure (i.e. resource availability for benthic consumers). Here, we studied shallow (0-20 m) benthic food web structure on the coasts of Petrels Island (Adélie Land, East Antarctica) during an event of unusually high spatial and temporal (two successive austral summers without seasonal break-up) sea ice cover. Using stable isotope ratios of C, N and S, we examined importance of several organic matter sources (benthic macroalgae, benthic biofilm, sympagic algae, suspended particulate organic matter and penguin guano) for nutrition of over 20 taxa of benthic invertebrates (sponges, sea anemones, nemerteans, sessile and mobile polychaetes, gastropods, bivalves, sipunculids, pycnogonids, amphipods, sea stars, sea urchins and sea cucumbers) spanning most present functional guilds. Our results provide insights about how Antarctic benthic consumers, which have evolved in an extremely stable environment, might adapt their feeding habits in response to sudden changes in environmental conditions and trophic resource availability. [less ▲]

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See detailPrêt "coup de pouce": un nouvel incitant fiscal wallon pour le financement des entreprises débutantes
Bourgeois, Marc ULg; Pace, Xavier ULg

in Bourgeois, Marc (Ed.) Les incitants fiscaux pour les PME - actualités et aspects comptables (2016, April 28)

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See detailPercevoir et reconnaître des symboles. La théorie de la représentation iconique de Dominic Lopes.
Hagelstein, Maud ULg

Conference (2016, April 28)

Perceiving and recognizing symbols. Dominic Lopes’ theory of iconic representation. In his works on the epistemological value of images (Understanding Pictures - 1996), Dominic Lopes (Department of ... [more ▼]

Perceiving and recognizing symbols. Dominic Lopes’ theory of iconic representation. In his works on the epistemological value of images (Understanding Pictures - 1996), Dominic Lopes (Department of Philosophy - University of British Columbia) develops an analytical aesthetics primarily concerned with iconic representation. His analysis distinguishes two models of iconic representation comprehension. In the first model, inspired by perceptual approaches like that of Richard Wollheim, the process of image recognition is rooted in perception (to sum it up: perceptualism embraces the idea of « likeness » between the image and what it represents). One of this model’s shortcomings, however, is that it too readily assumes that perception can be a natural, straightforward process. Indeed, iconic representation can not be understood through perception alone, as vision is of course influenced by cultural and, most of all, cognitive processes. A representative model thus needs to account for the ways in which iconic recognition differs from ordinary visual recognition. In the second model, which build off of symbolic approaches like that of Nelson Goodman, iconic representation works the same way as other types of symbols, particularly linguistic ones. Thus, this approach considers the similarities between images and language (representations which are both affected by processes of denotation and predication). However, we all know how strongly image theoreticians have been resisting the linguistic paradigm (iconic turn topic): some worry about overlooking the image’s semantic density in favor of its « simple » descriptive quality. Lopes finds a path between these two models by developing a « theory of aspect recognition », which incorporates perceptive elements into a symbolic structure. According to Lopes, if we agree that images belong to symbolic systems of denotation, then « they might be symbols for which the reference is dependent on the carrying out of perceptive aptitudes », a claim which my talk will explore. I will also discuss how Lopes’ theory accounts for skills acquisition (the capacity to recognize) through images, and shows how images help these skills progressively develop. [less ▲]

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See detailLa ligne et la boucle. Michel Strogoff ou l'involution
Durand, Pascal ULg

Conference (2016, April 28)

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See detailModelling of long-term deep renovation strategies for the Belgian building stock
Ruellan, Guirec ULg

Poster (2016, April 28)

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high ... [more ▼]

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high performance of new constructions represented in the nearly zero energy buildings target is not sufficient to ensure the efficiency of the overall building sector. Therefore, it is crucial to put in place a progressive renovation policy. Despite the different renovation strategies and projects that took place in the recent year in Belgium, the overall renovation rate remains almost stable for the last ten years. This study focuses on the renovation market in Belgium and analyzes the factors that influence the evolution of the renovation rate. The objective is the identification and development of effective strategies bypass that leads to increased renovation rates in Belgium. The research methodology is based on an iterative process, based on a systematic literature review of Flemish and Walloon projects, publications and policy. These first work package will allow to identify factors influencing the renovation rate and in other hand to build a model of the existing building stock. Impacts of the influencing factors on the building stock are simulated in the fourth work package in order to propose an action plan in the last part. Three mains outcomes are expected: A model of the existing building stock in Belgium and its retrofit potential, a simulation of the effects of different strategies used to increase the renovation rate in Belgium and a theoretical action plan on strategies to increase the rate of renovation in Belgium. These results are necessary to inform and support the decision making of policy makers, municipalities and operational planning authorities across Belgium. [less ▲]

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