References of "Scientific congresses and symposiums"
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See detailQuels modèles pour soutenir la prévention et la promotion de la santé ?
Vanmeerbeek, Marc ULg; Mathonet, Julien; Miermans, Marie-Christine ULg et al

Conference (2014, November 28)

Contexte et objectifs La prévention n’atteint pas souvent son objectif d’accès universel aux soins préventifs. Les modèles opérationnels publiés concernant la prévention et la promotion de la santé en ... [more ▼]

Contexte et objectifs La prévention n’atteint pas souvent son objectif d’accès universel aux soins préventifs. Les modèles opérationnels publiés concernant la prévention et la promotion de la santé en soins primaires ont été recherchés pour réaliser un inventaire fonctionnel et formuler des hypothèses de travail sur l’efficacité et l’équité de la prévention. Méthode Revue narrative de littérature utilisant les mots-clés relatifs aux différents niveaux de prévention, à la promotion de la santé, aux soins primaires, aux modèles de pratique et à la délivrance de soins. Une analyse multicritères a été utilisée. Principaux résultats Douze modèles ont été sélectionnés. Les modèles dont les auteurs annoncent qu’ils s’appliquent à la prévention décrivent majoritairement des approches centrées sur les individus dans le cadre de la relation médecin-patient, prenant en compte l’organisation de pratique. Certains modèles systémiques de type socio-écologique illustrent le concept de promotion de la santé : pratique éducative, ciblage sur des groupes ou des populations, prise en compte des milieux de vie et des déterminants sociaux de la santé. La place des patients dans l’élaboration des modèles est mineure, à l’image de leur implication comme acteurs dans les systèmes de soins. Les définitions des termes de prévention, promotion de la santé et éducation du patient diffèrent considérablement d’un modèle à l’autre. Discussion et conclusion Certains éléments valorisés par la promotion de la santé seraient intégrables aux pratiques de soins : empowerment individuel des patients, prise en compte de leurs milieux de vie ; participation accrue à des réseaux locaux de professionnels de la santé ; intégration, au sein des mêmes structures, de l’approche individuelle et collective pour permettre la poursuite simultanée des objectifs de personnalisation, d’efficacité et d’équité. Ces évolutions ont des implications sur la formation des soignants, en termes d’aptitudes communicationnelles, de sensibilisation aux concepts de la santé publique et d’immersion précoce des futurs soignants dans la communauté. [less ▲]

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See detailGuidance chez les professionnels de la voix
Remacle, Angélique ULg

Conference (2014, November 28)

Cet atelier s’intéresse aux locuteurs professionnels, soit les personnes qui ne peuvent se passer de leur voix dans le cadre de leur travail, par exemple les enseignants et les chanteurs. Outre la ... [more ▼]

Cet atelier s’intéresse aux locuteurs professionnels, soit les personnes qui ne peuvent se passer de leur voix dans le cadre de leur travail, par exemple les enseignants et les chanteurs. Outre la présentation de pistes relatives à la prévention et la prise en charge de cette population, l’atelier comporte des manipulations d'accumulateurs vocaux, y compris l'utilisation du feedback tactile dans le but de modifier le comportement vocal (contrôle de la fréquence et du niveau de pression sonore de la voix). Des moyens permettant de réduire la charge vocale et le bruit environnant sont également présentés et manipulés : système d’amplification vocale et traqueur de bruit. [less ▲]

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See detailIsocinétisme et tendinopathies
Croisier, Jean-Louis ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract Book des XVIèmes Rencontres isocinétiques de Médimex (2014, November 28)

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See detailFunctional analysis of FRD3 in Arabidopsis relatives
Scheepers, Maxime ULg; Charlier, Jean-Benoit ULg; Motte, Patrick ULg et al

Poster (2014, November 28)

Transcriptomic studies identified genes which are constitutively over-expressed in A. halleri compared to A. thaliana and which may have a role in metal tolerance or accumulation (1-3). A candidate gene ... [more ▼]

Transcriptomic studies identified genes which are constitutively over-expressed in A. halleri compared to A. thaliana and which may have a role in metal tolerance or accumulation (1-3). A candidate gene encodes FRD3, a member of the MATE family of membrane transporters (56 members in A. thaliana). It is a citrate transporter involved in iron homeostasis (4-6) and playing a role in zinc tolerance in A. thaliana (7). We are aiming to analyse the FRD3 high expression in A. halleri and the FRD3 function in zinc and iron homeostasis in A. thaliana. [less ▲]

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See detailTracking stressed blood volume during vascular filling experiments
Pironet, Antoine ULg; Dauby, Pierre ULg; Chase, J. Geoffrey et al

Poster (2014, November 28)

A three-chamber cardiovascular system model is used to compute stressed blood volume from filling experiments. As previously observed, stressed blood volume is a good predictor of the change in cardiac ... [more ▼]

A three-chamber cardiovascular system model is used to compute stressed blood volume from filling experiments. As previously observed, stressed blood volume is a good predictor of the change in cardiac output after fluid infusion. [less ▲]

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See detailEstimating Ventricular Stroke Work from Aortic Pressure Waveform
Kamoi, Shun; Pretty, Christopher; Chiew, Yeong Shiong et al

Poster (2014, November 28)

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See detailHow light and occupational therapy intervention could fight some psychogeriatric symptoms
Maggi, Patrick ULg; Bassain, Fatima; Gosset, Christiane ULg et al

Conference (2014, November 27)

Purpose: Aggregated results of systematic reviews separately show how light used as a treatment and some occupational therapy interventions could have a positive impact on psychobehavioural disorders in ... [more ▼]

Purpose: Aggregated results of systematic reviews separately show how light used as a treatment and some occupational therapy interventions could have a positive impact on psychobehavioural disorders in older people. Since the beginning of June 2014 the Walloon Government has been financing a project which consists of a non-pharmacological approach that combines light and occupational therapy for a psychogeriatric population with specific symptoms: spatial and temporal disorientations, apathy, depression, agitation, anxiety, confusion and circadian disorder. The objective of this abstract is to expose the assumptions that the combination of two different light devices and one specific occupational therapy program could have an impact on the different symptoms of a psychogeriatric population. Methods: To build our hypothesis, two literature reviews have been achieved. The first one concerning the use of light as therapy gathered 30 studies while the other one about occupational therapy activities collected 35 articles. Results: Despite of a heterogeneity between studies dealing with light and occupational therapy, the combination of these two non-pharmacological interventions might fight the depressive syndrome, reduce the temporal disorientation thanks to a regularity in the period of activity, restore the circadian rhythm and so reduce some troubles that can be linked to them: sleep disorder, risk of fall, apathy, agitation, behavioural and cognitive troubles (attention, concentration). Moreover, one of the two light devices used which can modulate the light intensity according to the rooms might reduce the spatial disorientation if it’s employed as a landmark. Conclusions: Based on literature reviews and our experience into this field it’s seems that a non-pharmacological approach involving light and occupational therapy intervention could have a positive effect on symptoms of psychogeriatric population. In admitting that those effects are becoming true after experimentation and analyses, we can also expect an improvement of the quality of life. [less ▲]

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See detailDiscussant Panel on "Public-Private Partnerships: New Governance Arrangements"
Remy, Céline ULg

Conference (2014, November 27)

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See detailL’animation théâtrale comme présence sociale
Brahy, Rachel ULg

Conference (2014, November 27)

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See detailAnalyse de contenu et indexation des résumés de communications des congrès CNGE Clermont 2013 et Lille 2014
Jamoulle, Marc ULg; Berkhout, Christophe

Conference (2014, November 27)

Analyse de contenu et indexation des résumés de communications des congrès CNGE Clermont 2013 et Lille 2014 Marc Jamoulle, Christoffe Berkhout Département universitaire de médecine générale. Université de ... [more ▼]

Analyse de contenu et indexation des résumés de communications des congrès CNGE Clermont 2013 et Lille 2014 Marc Jamoulle, Christoffe Berkhout Département universitaire de médecine générale. Université de Liège Département de médecine générale, Lille 2 marc.jamoulle@doct.ulg.ac.be Intro Communiquer lors d’un congrès de médecine générale représente un travail important. L’indexation de ces communications est un problème non résolu. Gérer la connaissance ainsi accumulée est un défi pour la profession de médecin de famille qui pose entre autres la question de la comparaison des résumés de communications acceptés et refusés. Méthodes L’analyse des 205 résumés de communication disponibles pour Clermont 2013 a été conduite au moyen du logiciel d’analyse qualitative ATLAS.ti. Les codes permettant d’identifier les concepts ont été choisis dans la Classification Internationale des Soins Primaires(CISP) pour les informations cliniques et dans 3CGP (Core Content Classification in GP/FM), un outil personnel de classification de l’information non clinique. L’encodage a été manuel et par un seul observateur. Les résumés du présent congrès Lille 2014 ont été mis à ma disposition au fur et à mesure de leur mise en ligne et ont été analysé de la même façon Résultats 205 résumés ont été analysés . Une première lecture des mots clefs et des résumés a permis de remettre des recommandations d’écriture avant le lancement des soumissions de Lille 2014. Les 205 résumés analysés par environ 900 items d’indexation permettent de découvrir les centres d’intérêts des médecins participants, de vérifier le bien-fondé de l’utilisation de la CISP pour indexer les résumés et d’approfondir la mise à jour de 3CGP, l’outil de classification non clinique. Au moment d’écrire ce résumé, il n’est pas possible de connaître le résultat de la comparaison entre abstracts acceptés refusés à Lille 2014. [less ▲]

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See detailLa sociologie par la littérature : une approche transdisciplinaire
Ledent, David ULg

Conference (2014, November 27)

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See detailPPP in the field of employment: clandestine strategies to become an efficient PPP?
Remy, Céline ULg

Conference (2014, November 27)

In this article, we study the Public-Private Partnerships (PPP) in the field of employment, in Belgium. These PPPs are established between Public Employment Service (PES) and private operators to create ... [more ▼]

In this article, we study the Public-Private Partnerships (PPP) in the field of employment, in Belgium. These PPPs are established between Public Employment Service (PES) and private operators to create projects for support and training for jobseekers the ultimate goal of which is social and professional reintegration. There are three critical moments in the life of the partnership: getting a partnership agreement with the PES, mobilizing jobseekers to participate in the delivery, and evaluating the outcomes achieved by the operator. The parties affected by these three critical steps are mainly the private operators. To overcome these difficulties, the providers implement informal and "clandestine" strategies to ensure the proper operation of the partnership and especially its performance and sustainability. [less ▲]

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See detailAllergies alimentaires
GADISSEUR, Romy ULg

Conference (2014, November 26)

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See detailApproche globale de la conception de chantiers de restauration hydromorphologique : illustration au travers de cas particuliers
Peeters, Alexandre ULg; de le Court, Bernard; Verniers, Gisèle

Conference (2014, November 26)

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See detailIn vitro hemocompatibility assessment of Near-IR-Emitting Ag2S Quantum Dots (QD)
Grandfils, Christian ULg; Hocaoglu, I.; Demir, F. et al

in Proceeding of the Nanobiotechnology International Workshop (2014, November 26)

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See detailRole of the polyQ length and non-polyQ regions during the aggregation process into amyloid fibrils of model polyQ proteins
Huynen, Céline ULg; Willet, Nicolas ULg; Buell, Alexander K et al

Poster (2014, November 26)

Nine neurodegenerative disorders, referred to as polyglutamine diseases and including Huntington’s disease, are associated with the abnormal expansion of a polyglutamine tract inside nine unrelated ... [more ▼]

Nine neurodegenerative disorders, referred to as polyglutamine diseases and including Huntington’s disease, are associated with the abnormal expansion of a polyglutamine tract inside nine unrelated proteins. This polyQ expansion is thought to be the major determinant in the development of neurotoxicity, triggering protein aggregation into amyloid fibrils. A large body of evidence however suggests that non-polyQ regions modulate the aggregation process triggered by polyQ expansions. The interplay between the polyQ tract and non-polyQ regions is complex and still not fully understood. In order to better understand it, we previously designed and characterized model polyQ proteins made of the beta-lactamase BlaP with 23, 30, 55 and 79Q inserted at position 197 or 216. Our first results had indicated that our model is relevant to study polyQ aggregation since it recapitulates the aggregation properties of polyQ disease-associated proteins: there is a Q-threshold for the spontaneous formation of amyloid fibrils in solution, and above the threshold, the longer the polyQ, the faster the aggregation. Moreover, the structure of BlaP and the position of insertion of the polyQ tract influence their aggregation properties in solution. This work aims to better understand, at the molecular level, (i) the precise role of the polyQ length (23, 30, 55, 61, 67, 73 and 79Q), (ii) the conformation of the host protein (native or unfolded BlaP), (iii) the location of the polyQ tract within BlaP (197 or 216), (iv) the flexibility of the polyQ flanking sequences, and (v) the origin of constraints applied by BlaP to the inserted polyQ tract (at its N- or C-terminal end) on the structural, thermodynamic and aggregation properties of BlaP-polyQ chimeras, using a wide range of biophysical techniques (e.g., spectroscopy methods, quartz crystal microbalance, atomic force microscopy and dynamic light scattering). The effect on the aggregation properties will be determined on the spontaneous aggregation into amyloid fibrils in solution, and on the nucleation and on the elongation steps of amyloid fibril formation. For this purpose, new chimeras containing 61, 67 and 73Q at position 197, or 55Q inserted at position 197 in between two different protease’s cleavage sites, that are relatively flexible, will be moreover created. Our results first demonstrate that the spontaneous aggregation into amyloid fibrils in solution is correlated to the polyQ length with an exponential growth function, and that the elongation rate is linearly correlated to the polyQ length, independently of the protein context (i.e., conformation of BlaP, and/or location of the polyQ tract, and/or polyQ peptides inserted or not within BlaP). However, the location of the polyQ tract inside BlaP, and/or its conformational state, and/or the flexibility of polyQ flanking sequences, and/or the origin of constraints applied to the polyQ tract drastically influence the ability of a polyQ tract to trigger the nucleation and/or the elongation step of amyloid fibrils (variation in the Q-threshold and in the absolute rate of both steps). Altogether, our results suggest that non-polyQ regions constitute an additional potential therapeutic target, more specific than drugs targeting the polyQ sequence, to interfere with the nucleation and/or the elongation of amyloid fibrils, associated to neurotoxicity. A possible drug could be constituted by a ligand specific to non-polyQ regions of disease-associated proteins, which further increases the constraints applied to the polyQ expansion to prevent the disease onset and/or progression. [less ▲]

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See detailProgramming self assembly by designing the 3D shape of floating objects
Poty, Martin ULg; Lagubeau, Guillaume ULg; Lumay, Geoffroy ULg et al

Conference (2014, November 25)

Self-assembly of floating particles driven by capillary forces at some liquid-air interface leads to the formation of two-dimensionnal structures. Using a 3d printer, milimeter scale objets are produced ... [more ▼]

Self-assembly of floating particles driven by capillary forces at some liquid-air interface leads to the formation of two-dimensionnal structures. Using a 3d printer, milimeter scale objets are produced. Their 3d shape is chosen in order to create capillary multipoles. The capillary interactions between these components can be either attractive or repulsive depending on the interface local deformations along the liquid-air interface. In order to understand how the shape of an object deforms the interface, we developed an original profilometry method. The measurements show that specific structures can be programmed by selecting the 3d branched shapes. [less ▲]

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See detailUse of 13C-NMR in structural elucidation of polysaccharides: case of locust bean gum
Gillet, Sébastien ULg; Aguedo, Mario ULg; Blecker, Christophe ULg et al

Poster (2014, November 25)

Locust bean gum (LBG) galactomannans are polysaccharides consisting of a β-(1→4) D-mannopyranosyl backbone substituted to varying degrees in α-(1→6) with single D-galactopyranosyl residues. This basic ... [more ▼]

Locust bean gum (LBG) galactomannans are polysaccharides consisting of a β-(1→4) D-mannopyranosyl backbone substituted to varying degrees in α-(1→6) with single D-galactopyranosyl residues. This basic structure is the same for all galactomannans (Fig. 2). However, when locust bean gum is extracted at different temperatures, the generated fractions exhibit different properties in aqueous solution (viscosity, viscoelasticity, gel formation, thermohydrolysis resistance, etc.). This means that there are differences within the fine structure of the polymers (although the basic structure is the same). Analysis of [13C]-NMR spectra of galactomannans, in combination with other techniques, can provide capital information about fine structural elucidation of the polymers. The method specifies the distribution of lateral galactosyls along the main chain of mannans. Two fractions extracted from locust bean gum at 25 and 80 °C (respectively GM25 and GM80) were comparatively studied by [13C]-NMR. Mannosyls/Galactosyls (M/G) ratios can be determined by considering the intensities of C-1 mannose and galactose signals in [13C]-NMR spectra. This method provides results relatively close to those obtained by GC-MS analysis. Spectra also showed that resonance from C4 of D-mannose residues were split, in evident dependence upon the nearest-neighbor probabilities (“diad frequencies”) of D-galactosyl groups along the mannan chains (Fig. 2). Diad frequencies were obtained by integrating C4(Man) peak areas. F11, F21/F12 and F22 gave respectively the di-, mono- or non-substituted mannose pairs proportions. High percentages of F11 and F22 therefore indicate a more non-homogeneous distribution of lateral galactosyls along the polysaccharide backbone as observed for GM80. The percentages of total lateral substituents obtained by C4(Man) peak analysis [F11 + (F21 or F12)/2] were fairly well correlated with M/G ratios. Splitting of the C-6 substituted D-mannose resonance provides, therefore the basis for determining the next-nearest-neighbor probabilities (triad frequencies) (Fig. 2). However, the spectrum is often not sufficiently resolved to accurately quantify and interpret the results. [less ▲]

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See detailGuides d'architecture moderne et contemporaine en Wallonie et à Bruxelles
Charlier, Sébastien ULg; Moor, Thomas

Conference (2014, November 25)

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See detailRemote control of self-assembled microswimmers
Vandewalle, Nicolas ULg; Grosjean, Galien ULg; Darras, alexis et al

Conference (2014, November 24)

Physics governing the locomotion of microorganisms and other microsystems is dominated by viscous damping. An effective swimming strategy involves the non-reciprocal and periodic deformations of the ... [more ▼]

Physics governing the locomotion of microorganisms and other microsystems is dominated by viscous damping. An effective swimming strategy involves the non-reciprocal and periodic deformations of the considered body. Herein, we show that a magnetocapillary-driven self-assembly, composed of three soft-ferromagnetic beads, is able to swim along a liquid-air interface when driven by an external magnetic field. Moreover, the system can be fully controled, opening ways to explore low Reynolds number swimming and to create micromanipulators in various applications. [less ▲]

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See detailA lasso penalization approach to differential item functioning
Magis, David ULg

Conference (2014, November 24)

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See detailPENSANDO LA CIUDAD SOSTENIBLE MÁS ALLÁ DE LA DICOTOMÍA ECOLOGÍA URBANA Y MEDIOAMBIENTE URBANO: EL CASO DE LA GOBERNANZA DEL AGUA EN COCHABAMBA
Cabrera Quispe, Juan Edson ULg; Farah, Jihad ULg

Conference (2014, November 24)

In this article, we go back on two ways of taking into account the environmental dimension in urban planning and governance. We stress the difficult articulation between these two approaches – “urban ... [more ▼]

In this article, we go back on two ways of taking into account the environmental dimension in urban planning and governance. We stress the difficult articulation between these two approaches – “urban ecology” and “urban environment” – and the actual impasse the discipline of urban planning finds itself in in its quest of the sustainable city. These two approaches for acting on the city by considering the complexity of its milieu build on different representations of this milieu and different modes of action legitimation. Negating each other, they can difficultly coexist, even less articulate. Through the example of water management in Cochabamba, we stress the tensions between these approaches. We point also to the awkward and marginalized position of urban planning and challenges it must face to regain a capacity of action in contemporary fragmented cities that know complex governance landscapes and rare or endangered resources. [less ▲]

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See detailPrototype SOLAP appliqué sur des champs continus en mode raster. Analyse de hot spots de criminalité.
Kasprzyk, Jean-Paul ULg

Conference (2014, November 24)

SOLAP (Spatial OnLine Analytical Processing) is a server which allows decision makers to quickly analyze archived data from a spatial datawarehouse. Until now, most of SOLAP tools only manage spatial data ... [more ▼]

SOLAP (Spatial OnLine Analytical Processing) is a server which allows decision makers to quickly analyze archived data from a spatial datawarehouse. Until now, most of SOLAP tools only manage spatial data through the vector mode. However, some visualization techniques use interpolation to transform them into continuous fields in raster mode. Crime hotspot mapping is one of them: data are modeled in raster with a KDE (Kernel Density Estimation) algorithm to offer a spatially continuous visualization of crimes. This research aims at combining hotspot mapping and SOLAP. First, we adapt SOLAP to continuous fields with a raster multidimensional data model. Then the raster model is adapted to KDE. The data model is validated with a prototype including London crime data. [less ▲]

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See detailConnectivité trophique entre deux écosystèmes: le cas des litières de laminaires et des substrats meubles côtiers
Vandenbosch, François; Dauby, Patrick ULg; Lepoint, Gilles ULg et al

Conference (2014, November 24)

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See detailInteractions between particles in a magnetocapillary self-assembly
Lagubeau, Guillaume ULg; Darras, Alexis; Grosjean, Galien ULg et al

Conference (2014, November 24)

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See detailImpact of steam explosion treatment on chemical configuration of Tall Fescue lignin : structural elucidation using NMR spectroscopy
Maniet, Guillaume ULg; Jacquet, Nicolas ULg; Gillet, Sébastien ULg et al

Poster (2014, November 24)

In the economic and energy context of our society, it is universally recognized that alternatives to petrochemicals products must be found. To overcome this problem, renewable lignocellulosic biomass ... [more ▼]

In the economic and energy context of our society, it is universally recognized that alternatives to petrochemicals products must be found. To overcome this problem, renewable lignocellulosic biomass could be used to produce high value products. To achieve this objective, pretreatment processes are required to allow the breakdown of lignocellulosic structure and increase accessibility of the material. In this way, steam explosion is a thermo-mechano-chemical pretreatment which allows the opening of lignocellulosic material structural components and includes modifications of the physical properties of the material, hydrolysis of hemicellulosic components and modification of the chemical structure of lignin [1]. This study is focused on the impact of various steam explosion treatments on the chemical configuration of tall fescue lignin. NMR analyses perform on the Festuca L. pretreated samples show variations of links with treatment intensity. Observations show double phenomen :re-polymerization and depolymerization of the lignin structure during steam explosion process [2]. In parallel, HPSEC analyses show modifications in the molecular weight of the lignin obtained after the steam explosion treatment. [less ▲]

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See detailA capillary Archimedes’ screw
Darbois-Texier, Baptiste ULg; Dorbolo, Stéphane ULg

Conference (2014, November 23)

As used by Egyptians for irrigation and reported by Archimedes, a screw turning inside a hollow pipe can pull out a fluid againt gravity. At a centimetric scale, an analagous system can be found with a ... [more ▼]

As used by Egyptians for irrigation and reported by Archimedes, a screw turning inside a hollow pipe can pull out a fluid againt gravity. At a centimetric scale, an analagous system can be found with a drop pending on a rotating spiral which is tilted toward the horizontal. The ascent of the drop to the top of the spiral is considered and a theoretical model based on geometrical considerations is proposed. The climb of the drop is limited by the fluid deposition on the screw at high capillary number and by a centrifugation phenomenon. We find out the range of fluid proprities and spiral characteristics for which an ascending motion of the drop is possible. Finally we discuss the efficiency of such system to extract a fluid from a bath at a centrimetric scale. [less ▲]

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See detailFoucault et Deleuze et Sami-Ali : postmodernité et psychothérapie.
Englebert, Jérôme ULg

Conference (2014, November 22)

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See detailL'ECMO, Témoignage de deux infirmiers
KOCH, Jean-Noël ULg; BODSON, Sébastien ULg

Conference (2014, November 22)

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See detailSpécificités syntaxiques des types de discours dans les Quatre Livres des Rois (12e s.)
Mazziotta, Nicolas ULg; Glikman, Julie

Conference (2014, November 21)

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See detailOn the finiteness and uniqueness of the weighted likelihood estimator of ability in polytomous IRT models
Magis, David ULg; Verhelst, Norman

Conference (2014, November 21)

In item response theory (IRT), the weighted likelihood (WL) estimator has become a central method to estimate ability levels of respondents. Primarily introduced with dichotomous IRT models (Warm, 1989 ... [more ▼]

In item response theory (IRT), the weighted likelihood (WL) estimator has become a central method to estimate ability levels of respondents. Primarily introduced with dichotomous IRT models (Warm, 1989), it was later extended to polytomous IRT models (Samejima, 1998). However, very few information is available about the behavior of the WL estimator, and especially about the uniqueness of the ability estimates as well as their finiteness. The purpose of this talk is to establish that with polytomous item response models, the WL estimator of ability always returns finite values. This result is valid for the class of difference models and divide-by-total models, independently of the number of items and the response patterns. However, such estimates may not necessarily be unique, as the WL solving equation may provide several optimal values. Some examples are considered to illustrate both findings. [less ▲]

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See detailHow does gender socialisation influence teenagers' behaviors ? : Contribution of ISRD-2 and ISRD-3 to this question
Gavray, Claire ULg

Conference (2014, November 21)

In both gender groups, young people entering the spiral of violence negatively often react against personal insecurity, against a hostile and little promising environment. But those environments still ... [more ▼]

In both gender groups, young people entering the spiral of violence negatively often react against personal insecurity, against a hostile and little promising environment. But those environments still differ between girls and boys according to the sphere which remains the most valorized, 'suitable' for them (public and competitive sphere for the boys, family and emotional sphere for the girls). ISRD data allow to show links between, on one side, the production of not authorized and violent behaviors and, on the other side, gendered concrete life, gendered attitudes and values. The theory of the societal vulnerability (Walgrave, Vettenburg) and the theory of recognition (Honneth) are confirmed. [less ▲]

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See detailSolar Wind Interaction with the Magnetosphere of Jupiter : Impact on the Magnetopause and the Aurorae
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2014, November 20)

The outcome of the interaction between the solar wind and the Jovian magnetic field bears many differences compared to the Earth's case. At Earth, the solar wind is the major particle and energy source in ... [more ▼]

The outcome of the interaction between the solar wind and the Jovian magnetic field bears many differences compared to the Earth's case. At Earth, the solar wind is the major particle and energy source in the magnetosphere. At Jupiter, the tremendous volcanism on the moon Io is the main plasma source and Jupiter's rapid rotation (relative to its size) is the main energy source for the particles populating its magnetosphere. Combined with a weaker solar wind pressure and a larger Alfvén Mach number as the distance from the Sun increases, all these parameters modify the relative importance of large scale Dungey reconnection and viscous interaction at the magnetopause. In order to study these differences, here we present a statistical analysis of magnetopause waves and flux tube event on the Jovian magnetopause, based on in-situ measurement from the spacecraft that flew-by or orbited around Jupiter. Moreover, variations of the solar wind have significant impact on the Jovian magnetospheric current systems and such changes reflect on the aurora. In this presentation, we will also review the recent findings concerning the aurora at Jupiter and their relationship with the solar wind. [less ▲]

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See detailA Debate on Responsible Research and Innovation
Van Oudheusden, Michiel ULg

Conference (2014, November 20)

In the space of just a few years the concept of Responsible Research and Innovation (RRI), or in Dutch Maatschappelijk verantwoord innoveren (MVI), has gained considerable ground: NWO has an MVI-program ... [more ▼]

In the space of just a few years the concept of Responsible Research and Innovation (RRI), or in Dutch Maatschappelijk verantwoord innoveren (MVI), has gained considerable ground: NWO has an MVI-program that has so far funded three rounds of research proposals; Horizon 2020 regularly refers to RRI; and there is now a new journal devoted to RRI. In this panel we focus on the following questions: • How could the concept become so popular in such a relatively short time? • What, if anything, is new in RRI, when we compare it to e.g. CTA, participatory TA, Public Engagement, etc? • If we want to make research and innovation more responsible and responsive to society’s needs, what are the opportunities and obstacles? • What are the conditions for successful mainstreaming of RRI? Panel members Frank Kupper (Athena Institute) Hub Zwart (Centre for Society and the Life Scences), Michiel van Oudheusden (author of a dissertation on Flemish RRI initiatives), and Tsjalling Swierstra (co-founder of the Journal for RI) share their thoughts with colleagues in the audience. [less ▲]

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See detailOn the Use of Principal Component Analysis for Parameter Identification and Damage Detection in Structures
Golinval, Jean-Claude ULg

Conference (2014, November 20)

Modal analysis is used extensively for understanding the dynamic behaviour of structures as well as for structural health monitoring or damage detection based on output-only measurements. In this ... [more ▼]

Modal analysis is used extensively for understanding the dynamic behaviour of structures as well as for structural health monitoring or damage detection based on output-only measurements. In this presentation, a different approach based on principal component analysis is considered. Principal component analysis (PCA), also called proper orthogonal decomposition (POD), is a multi-variate statistical method that aims at obtaining a compact representation of the data. In the present paper, PCA (POD) is used for three purposes, namely damage detection, structural health monitoring and identification of nonlinear parameters. The key idea of PCA is to reduce a large number of measured data to a much smaller number of uncorrelated variables while retaining as much as possible of the variation in the original data. To this purpose, an orthogonal transformation to the basis of the eigenvectors of the sample covariance matrix is performed, and the data are projected onto the subspace spanned by the eigenvectors corresponding to the largest eigenvalues. This transformation has the property to decorrelate the signal components and to maximize variance. The first problem to which PCA is applied here is the damage detection problem. When applied to vibration measurements, it can be shown that the basis of eigenvectors (called the proper orthogonal modes) span the same subspace as the mode-shape vectors of the monitored structure. Thus the damage detection problem may be solved using the concept of subspace angle between a reference subspace spanned by the eigenvectors of the initial (undamaged) structure and the subspace spanned by the eigenvectors of the current (possibly damaged) structure. The second problem concerns structural health monitoring of civil engineering structures when environmental effects (e.g. the influence of the variation of the ambient temperature) have to be removed from the structural changes. In this case, PCA may be applied on identified modal features (e.g. the natural frequencies) to separate the changes due to environmental variations from the changes due to damage sources. This procedure is illustrated on the example of a real bridge located in Luxembourg. The third problem is related to the estimation of nonlinear parameters using model updating techniques. In this case, the most interesting property of PCA is that it minimizes the average squared distance between the original signal and its reduced linear representation. When applied to nonlinear problems, PCA gives the optimal approximating linear manifold in the configuration space represented by the data. The linear nature of the method is appealing because the theory of linear operators is still available. However, it should be borne in mind that it also exhibits its major limitation when the data lie on a nonlinear manifold. [less ▲]

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See detailBoolean Functions for Classification: Logical Analysis of Data
Crama, Yves ULg

Conference (2014, November 20)

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See detailIn vitro study toward the endocrine activity and the genotoxic potential of migration products from plastic baby bottles
Simon, Coraline ULg; Onghena, M.; Covaci, A. et al

Poster (2014, November 20)

Bisphenol A (BPA) is used since 1960 as a primary raw material for the production of polycarbonate (PC) plastic and epoxy resin, widely used in a variety of common products including digital media (e.g ... [more ▼]

Bisphenol A (BPA) is used since 1960 as a primary raw material for the production of polycarbonate (PC) plastic and epoxy resin, widely used in a variety of common products including digital media (e.g., CDs, DVDs), electrical and electronic equipment, automobiles, sports safety equipment, reusable food and drink containers , as well as baby bottle. During the last decades, in several studies, the migration of BPA is documented to be a well-known source of food contamination. Some studies have shown that BPA, which is able to mimic the action of and hormone and to disrupt normal endocrine function, may be associated to several health problems and diseases. Recently, the European Union took a series of measures, including a ban for the import and sale PC baby bottles to reduce BPA exposure to infants. Plastic alternatives to polycarbonate have massively appeared on Belgium market. Although there are several studies on BPA migration from polycarbonate into foodstuff under a variety of conditions, there is a small amount of information about consequences on human health of the potential exposure to chemicals migrating from PC alternatives, including bottles commonly labelled “free BPA”. In a recent opinion (No. 8697, 11.03.2010), the Belgium Superior Health Council's issued its concern regarding the currently used alternatives to PC. Furthermore, they asked to investigate the possible risks associated with the use of these alternatives. In order to evaluate the safety of these alternatives, the genotoxicity and the activity on several receptors of chemical compounds migrating from PC alternatives, identified by Simoneau & al, 2012 , were evaluated using reporter gene assays. Receptor agonistic and antagonistic activities of 39 pure compounds were measured. After the first screening, certain substances clearly showed an activity on several receptors such as BPA, and Bisphenol S, while only a few substances showed no reaction on the different receptor. None of the 39 components was genotoxic as identified in the Vitotox test. However, further experiments will be performed to characterize their activity and confirm the result for the genotoxicity. [less ▲]

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See detailTraitements conservateurs de la gonarthrose
Kaux, Jean-François ULg

Conference (2014, November 20)

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See detailSpatial Analysis of GNSS Measurements from an Equatorial Ionospheric Scintillation Monitoring Receiver (ISMR) Network
Lonchay, Matthieu ULg; Wautelet, Gilles ULg; Cornet, Yves ULg et al

Conference (2014, November 19)

The ionosphere has always been a major limitation for GNSS positioning applications. Free electrons in the ionosphere perturb the propagation of GNSS radio signals involving both refraction and ... [more ▼]

The ionosphere has always been a major limitation for GNSS positioning applications. Free electrons in the ionosphere perturb the propagation of GNSS radio signals involving both refraction and diffraction effects. In particular, small-scale ionospheric irregularities generated by different physical processes may cause scattering effects on GNSS signals, producing rapid fluctuations of the signal phase and amplitude as a result. Such scintillations of GNSS signals are responsible for critical consequences regarding applications, such as precise positioning, due to many resulting effects: cycle slips, signal power fading, receiver loss of lock and poor resulting satellite geometry. Ionospheric Scintillation Monitoring Receivers collect high-rate GNSS data. Specific scintillation parameters, such as the well-known S4 and Phi60 indices, are built on high-rate measurements performed on GNSS signals and provide additional information to characterize the intensity of such an event occurring at a specific geographic location at a given time. Spatial Statistics belong to the field of Spatial Analysis, Geography and GIS (Geographic Information System). This discipline allows to perform analyses of data which are localised in space. Ionospheric Scintillation observations achieved by ISMR stations can be characterized by a set of attributes (S4, Phi60, Rate of TEC, etc.) including also the geographic location of their respective Ionospheric Pierce Point (IPP). By combining the simultaneous Multi-GNSS ISMR measurements from a network of ISMR stations, we can obtain a spatially denser data set, able to support spatial statistics tests. The idea of our research is to provide a spatio-temporal analysis of ionospheric scintillation events over Equatorial regions by applying spatial statistics on ISMR Multi-GNSS measurements. In particular, by using spatial statistics, we aim to resolve specific issues regarding ionospheric scintillation data from an ISMR network established in Brazil. The research consists in spatially describing the data set, detecting and measuring potential spatial autocorrelation, determining the scale of the spatial dependency and finally producing an interpolated scintillation sky map at a given time. In terms of applicability of the methodology, our research project consists in exploiting the spatio-temporal analysis performed on ionospheric scintillation data in order to improve the performances and the reliability of Absolute GNSS Positioning algorithms under moderate ionospheric scintillation conditions. By assessing correlations existing between specific ISMR data and classic GNSS observations, the method could be extended to a more general usage which would be independent of ISMR measurements. [less ▲]

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See detailGravitational lensing search for dark matter halos
Biernaux, Judith ULg

Conference (2014, November 19)

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See detailThe physical education teacher as a physical activity promoter: Current developments
Cloes, Marc ULg

Conference (2014, November 19)

The physical education teacher is considered as a cornerstone of the physical activity promotion in the schools. This presentation proposes answers to three questions: (1) Why to promote physical activity ... [more ▼]

The physical education teacher is considered as a cornerstone of the physical activity promotion in the schools. This presentation proposes answers to three questions: (1) Why to promote physical activity at school? (2) Why the PE teacher should play a central role? (3) How the PE teacher could play such role? In conclusion, it is important to remember that (1) PE teachers should become the cornerstones of the PA promotion at school; (2) They have to be involved in PE as well as in the other dimension of PA at school; (3) They have to collaborate (they are not alone), and; (4) Pre service and inservice PETE has to be adapted to show the way and change the mentalities [less ▲]

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See detailDo we need dark matter in cosmology?
Magain, Pierre ULg; Hauret, Clémentine ULg

Conference (2014, November 19)

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See detailPlate-forme interactive au service des grandes populations d’étudiants suivant un cours de Physique
Marique, Pierre-Xavier ULg; Hoebeke, Maryse ULg

Conference (2014, November 18)

La réforme des études de médecine introduite en 2012 en Communauté Française (Belgique) a fortement modifié les programmes de cours, entre autres celui de physique, pour lequel certaines notions sont ... [more ▼]

La réforme des études de médecine introduite en 2012 en Communauté Française (Belgique) a fortement modifié les programmes de cours, entre autres celui de physique, pour lequel certaines notions sont désormais considérées comme prérequises. Conscientes que celles-ci ne sont pas toujours acquises par les étudiants, les équipes pédagogiques de l'ULg ont élaboré des systèmes de remédiation. Un espace en ligne a notamment été développé, parallèlement au cours présentiel, afin de permettre aux enseignants et aux étudiants d'évaluer les difficultés et lacunes de ces derniers et d’y remédier. Cet outil est conçu pour offrir une aide spécifique adaptée à chacun malgré le nombre important d’étudiants inscrits (800 en 2013). Ils peuvent y travailler, de manière progressive et autonome, les aspects théoriques (notes et tests formatifs) et pratiques (exercices, problèmes décomposés ou non). Des tests diagnostiques en début et fin de parcours permettent aux apprenants d’apprécier leur évolution. De plus, la plate-forme centralise différents outils interactifs (forums, calendrier, annonces, …) accompagnant l’étudiant dans l’organisation de son parcours. Les premières analyses de traces indiquent une corrélation entre travail en ligne et réussite. Une adaptation progressive de l’outil sera basée sur l’analyse des résultats et du ressenti de étudiants. [less ▲]

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See detailDesign and implementation of a T impedance matching network for the radiocommunication subsystem aboard the OUFTI-1 nanosatellite
Boutaayamou, Mohamed ULg; Crosset, Nicolas ULg; Werner, Xavier ULg et al

in Proceedings of the URSI Forum 2014 (2014, November 18)

We describe how we handled an unexpected impedance matching issue on the receiver side (at UHF) of the radiocommunication system aboard the OUFTI-1 nanosatellite of the University of Liège. Our approach ... [more ▼]

We describe how we handled an unexpected impedance matching issue on the receiver side (at UHF) of the radiocommunication system aboard the OUFTI-1 nanosatellite of the University of Liège. Our approach relied on a combination of novel analytical developments combined with experimentation. [less ▲]

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See detailKeynote speech: Revisiting the Social Economy through Social Entrepreneurship
Defourny, Jacques ULg

Conference (2014, November 18)

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See detailPRESPHOTO – a project to improve the preservation of cyanobacteria and diatom cultures
Deprez, Karolien; Vanormelingen, Pieter; Crahay, Charlotte ULg et al

Poster (2014, November 18)

The availability of biological material of guaranteed identity and quality in Biological Resource Centers is considered fundamental for scientific research and R&D, but depends heavily on adequate ... [more ▼]

The availability of biological material of guaranteed identity and quality in Biological Resource Centers is considered fundamental for scientific research and R&D, but depends heavily on adequate preservation methods. We present a new BRAIN-BE project on improving the preservation of two groups of photosynthetic microorganisms, cyanobacteria and diatoms, in two collections of the Belgian Co-ordinated Collections of Micro-organisms (BCCM). First, we will improve the cultivation success of diatoms from different habitats by testing different culture media. For organisms that keep resisting cultivation, we will develop DNA extraction and amplification, as well as morphological investigation based on single cells. Secondly, we will design and validate improved cryopreservation protocols for both diatoms and cyanobacteria, since cryopreservation is now the preferred method for the long-term storage of microalgal cultures. For that, the two-step cryopreservation method will be tested using several cryoprotectants and strains in different growth stages. Moreover, this will be compared with the encapsulation/dehydration method. For cyanobacteria, viability tests will be performed with vital dyes whereas diatoms’ survival will be assessed by PAM fluorometry. In addition, genome resequencing will be applied to determine the impact of the cryopreservation protocol(s) on genomic stability. Finally, a genomic DNA bank will be constructed and validated. This is highly complementary to preservation as living strains, given that some users require only genomic DNA and it may not be feasible to preserve the global microalgal species diversity as living cultures. [less ▲]

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See detailGlutamate controls brain estrogen synthesis during sexual interactions
de Bournonville, Catherine ULg; Aourz, Najat; Van Eeckhaut, Ann et al

Poster (2014, November 17)

Besides their long-lasting effects mediated by a modulation of gene transcription, brain-derived estrogens can rapidly regulate (within minutes) reproductive behaviors. In vitro, the activity of aromatase ... [more ▼]

Besides their long-lasting effects mediated by a modulation of gene transcription, brain-derived estrogens can rapidly regulate (within minutes) reproductive behaviors. In vitro, the activity of aromatase (AA), the enzyme responsible for the conversion of androgens into estrogens, is also regulated on a similar short time-scale, via phosphorylation of the enzyme resulting from changes in neuronal activity or glutamate release. Acute changes in AA have been documented ex vivo in specific brain regions following exposure to social or stressful stimuli but the mechanism underlying these regulations is not known. To investigate whether glutamate is implicated in these rapid changes in AA, male quail received a unilateral injection of kainate in the medial preoptic nucleus (POM). The left and right preoptic areas were collected 20 min later and assayed separately by the tritiated water technique for AA. As shown previously in preoptic explants maintained in vitro, AA was downregulated in the kainate-injected hemisphere as compared to the non-injected side. To determine whether the decline in AA detected in the POM after a sexual interaction could be mediated by an increased release of glutamate in this region, extracellular glutamate concentration was measured by in vivo microdialysis with a probe implanted in the POM of sexually mature males. Dialysate was collected every 3 minutes over three periods of 15 min when the male was (1) alone, (2) allowed to freely copulate with a female and (3) alone again. A transient rise in extracellular glutamate concentration was observed specifically and immediately after the expression of cloacal contact movements, when semen is transferred to the female. Glutamate returned to a basal level after the female was removed. Together, these results indicate that the mechanism of acute regulation of aromatase activity by glutamate identified in vitro is potentially responsible for the acute regulation of the enzyme observed in vivo following copulation. As rapid changes in brain estrogen synthesis and its actions are apparently related to the control of sexual motivation rather than sexual performance, follow up experiments should now determine whether the release of glutamate in the POM occurs in parallel with an increase in motivation or follows the termination of the copulatory sequence. [less ▲]

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See detailLes changements sociétaux sont-ils promoteurs de bien-être au travail ?
Mairiaux, Philippe ULg

Conference (2014, November 17)

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See detailSpecific properties of bone marrow mesenchymal and neural crest-derived stem cells: Relevance in spinal cord injury therapy.
Neirinckx, Virginie ULg; Agirman, Gulistan ULg; Marquet, Alice ULg et al

Poster (2014, November 17)

Spinal cord injury (SCI) treatment represents a critical issue in clinical research and patient care. Stem cell-based replacement therapies have already been proposed worldwide, especially studying stem ... [more ▼]

Spinal cord injury (SCI) treatment represents a critical issue in clinical research and patient care. Stem cell-based replacement therapies have already been proposed worldwide, especially studying stem cells from the adult bone marrow stroma. Previous studies focusing on those cells did not specifically consider their intrinsic embryonic heterogeneity, thus intermingling different stem cells subpopulations to treat experimental SCI or even injured patients. In this study, we decided to compare adult bone marrow neural crest-derived stem cells (NCSC) and mesenchymal stem cells (MSC), and highlight which of their specific properties could be relevant in therapeutic perspectives. In that purpose, we compared NCSC and MSC isolated from adult mouse bone marrow. We then compared the effects that both cell types could exert once grafted inside an injured spinal cord. Cells were injected into the spinal cord of mice that right after a spinal cord contusion at the T11-12 spinal level. Our results indicate that both MSC and NCSC-injected mice recovered locomotion abilities faster than control mice (as assessed by BMS scoring). Additionally, we observed that after 28 days post-injury, the lesion volume tended to decrease in mice that received cell graft compared to control group. Interestingly, it appeared that MSC seemed to be able to modulate inflammation inside the lesion, more than NCSC. Indeed, MSC-graft increased early neutrophil and macrophage recruitment in the bloodstream and inside the spinal cord, and increased the number of arginase-1-expressing cells remaining in the spinal cord after 28 days. In parallel, we compared the secretome of both NCSC and MSC, and noticed some interesting differences: MSC secreted several chemokines reflecting possible immunomodulating properties, while NCSC secreted products might be able to enhance neurite outgrowth. Indeed, preliminary data showed that NCSC induced neuritogenesis on primary neurons in vitro. Altogether, those results should help to improve and optimize cell-based therapies parameters and/or to define precise and efficient pharmacological treatments for SCI patients. [less ▲]

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See detailGNSS observational bias in the frame of ionospheric studies
Wautelet, Gilles ULg; Warnant, René ULg

Poster (2014, November 17)

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See detailContrasting the role of Ih and ICaT currents in post-inhibitory rebound mechanisms in reciprocal-inhibitory networks
Dethier, Julie ULg; Drion, Guillaume ULg; Sepulchre, Rodolphe

Poster (2014, November 16)

Models with reciprocal inhibition are ubiquitous in the literature. For instance, common rhythmic motor behaviors produced by central pattern generators (CPGs) involve half-center oscillators, which ... [more ▼]

Models with reciprocal inhibition are ubiquitous in the literature. For instance, common rhythmic motor behaviors produced by central pattern generators (CPGs) involve half-center oscillators, which consist of two inhibitory neurons that are not endogenous oscillators, but produce rhythmic outputs when reciprocally connected (Marder & Calabrese 1996). Models of thalamocortical spindle oscillations also suggest that the rhythm originates from the thalamic reticular nucleus, which consists in interacting inhibitory nonoscillatory neurons (Wang & Rinzel 1992). [less ▲]

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See detail"Preußisch-deutsch" und "wallonisch". Zur Identitätsproblematik der Malmedyer Wallonie im Ersten Weltkrieg
Brüll, Christoph ULg

Conference (2014, November 15)

Durch die Artikel 32-34 des Versailler Vertrags wurden die beiden deutschen Grenzkreise Eupen und Malmedy nach einer umstrittenen Volksbefragung im Jahr 1920 Belgien zugeschlagen. Dabei wies der Kreis ... [more ▼]

Durch die Artikel 32-34 des Versailler Vertrags wurden die beiden deutschen Grenzkreise Eupen und Malmedy nach einer umstrittenen Volksbefragung im Jahr 1920 Belgien zugeschlagen. Dabei wies der Kreis Malmedy eine Besonderheit auf: er war zwei- bzw. dreisprachig Deutsch-Wallonisch-Französisch. Tatsächlich waren rund 10.000 Wallonen seit den Entscheidungen des Wiener Kongresses von 1815 Bürger Preußens und später des Kaiserreichs gewesen. Der Beitrag fragt nach ihrer Identität im Kaiserreich, wo sie zu Kollateralopfern der gegen größere Minderheiten gerichteten Germanisierungspolitik wurden, woraus ein wallonischer Kulturpartikularismus an der deutsch-belgischen Grenze resultierte. Dabei wird auch deren Offenheit während des langen 19. Jahrhunderts deutlich, die durch intensive grenzüberschreitende soziale, wirtschaftliche und auch kulturelle Kontakte gekennzeichnet ist. Der Beginn des Ersten Weltkriegs wurde deshalb als umso dramatischer empfunden. Die Haltung der Bevölkerung in der so genannten Preußischen Wallonie während des Kriegs ist jedoch bisher von der Forschung kaum in den Blick genommen worden. Deutlich lässt sich jedoch der Einfluss eines sich nunmehr erheblich beschleunigenden Nationalisierungsprozesses an der Grenze zum besetzten Belgien ausmachen. Auf der Grundlage der im Staatsarchiv Eupen erhaltenen Bestände des Kreisarchivs Malmedy im Kreis sollen die Auswirkungen des Krieges auf die kleinste Minderheit im Westen dargestellt werden. Gefragt werden soll nach Misstrauensbekundungen „von oben“, nach potentiellen Loyalitätskonflikten, z.B. in Form von Desertionen, ggf. nach Nachkriegsvorstellungen der Betroffenen und nach einem Wandel von Zugehörigkeitsgefühlen. Besonderes Augenmerk wird dabei auf jene (überaus seltenen) Akteure gelegt, die schon vor 1914 einen Anschluss des Gebietes an Belgien gefordert hatten und die sich der besonderen Aufmerksamkeit der preußischen Behörden gewiss sein konnten. Kaum zu überschätzen ist auch die Bedeutung der Pfarrer, die in einer als streng katholisch geltenden Region erheblichen Einfluss auf das politisch-gesellschaftliche Leben und – selbstverständlich – auf die Trauerarbeit für gefallene Soldaten (deren Zahl sich auf einige Hundert beläuft) nahmen. Nicht zuletzt stellt sich die Frage nach der Erfahrung des Kriegsendes und der darauf folgenden Besatzungszeit durch britische Truppen, die im August 1919 von belgischen Soldaten abgelöst wurden. Diese Fragen sind bisher, so sie denn überhaupt gestellt worden sind, zumeist aus der Perspektive des Staatenwechsels von 1920 beantwortet worden. Der Kampf einiger Akteure für die Behauptung einer wallonischen Identität innerhalb des Kaiserreichs wurde in der belgisch-nationalen Historiographie zu einem Kampf für die Eingliederung durch Belgien umgedeutet, die Zugehörigkeit zu Preußen zum dark age der lokalen Vergangenheit erklärt – wobei die Zugehörigkeit zur französisch-wallonischen Sprachgemeinschaft hier eine andere Ausgangslage schaffte als für ebenfalls an Belgien abgetretenen deutschsprachigen Gemeinden um die Städte Eupen und St. Vith. Diese Narrative entfalteten ihre durchschlagende Wirkung jedoch erst nach dem Zweiten Weltkrieg und der 1940 erfolgten Wiedereingliederung Eupen-Malmedys durch das „Großdeutsche Reich“. Der Beitrag unternimmt den Versuch, die Entwicklung der Jahre 1914-1920 nicht von ihrem Ende her zu betrachten, wobei der – bisher vernachlässigten – erfahrungsgeschichtlichen Perspektive besondere Bedeutung zukommt. Insofern zielt er ebenfalls darauf ab, die Grenzgeschichte aus der Zentrum-Peripherie-Perspektive zu lösen und – auch sehr kleine – Grenzregionen als Akteur (und nicht als bloßes Objekt) zu fassen. [less ▲]

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See detailBorréliose: mythe ou réalité ?
Amory, Hélène ULg; Houben, Rosa ULg; Pitel, Pierre Hugues et al

Conference (2014, November 15)

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See detailEffect of “diagnosis threat” in clinical setting
Fresson, Megan ULg; Dardenne, Benoît ULg; Meulemans, Thierry ULg

Poster (2014, November 14)

Objective. When reminded of their neurological history, mild traumatic brain injured (TBI) students underperform on neuropsychological tests (Suhr & Gunstad, 2002). To date, this “diagnosis threat” (DT ... [more ▼]

Objective. When reminded of their neurological history, mild traumatic brain injured (TBI) students underperform on neuropsychological tests (Suhr & Gunstad, 2002). To date, this “diagnosis threat” (DT) phenomenon has mainly been studied with a non-clinical and high-functioning population (university students). The aim of this study was twofold: to study this phenomenon with neurological patients and to examine the mechanisms responsible for underperformance. Method. Patients (18-55 years-old) who had sustained a TBI or a stroke were recruited from ambulatory and hospitalized cares, and then assigned to one of three conditions : Patients attention was drawn on (1) their neurological disease and the neuropsychological components of the upcoming tasks (DT group) ; (2) their intact sensory capacities and the sensorial components of the tasks (Neutral group); or (3) their better cognitive abilities compared to Alzheimer disease patients (Stereotype boost group). After these instructions, patients carried out cognitive tasks and completed questionnaires. Results. Preliminary analyses (n=18) showed that, on the z-score of executive functioning, the DT group performed worse than both the neutral group (p=.03) and the stereotype boost group (p=.05), but did not differ for the attentional and memory scores. Instructions also had an impact on cognitive self-efficacy, with the neutral group demonstrating greater score than the negative one (p=.08). Furthermore, the self-efficacy score tended to correlate with the score of executive functioning (r=.37). Conclusions. Results show that the DT phenomenon has an impact on cognitive performances in clinical setting, at least on executive functions, which are usually demonstrated to be the most sensitive to stereotype effects. [less ▲]

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See detailLe rôle de l'altérité dans la conscience malheureuse hégélienne
Petteni, Oriane ULg

Conference (2014, November 14)

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See detailRé-créations familiales entre ruptures, pertes et nouvelles appartenances
D'Amore, Salvatore ULg

Conference (2014, November 14)

Les familles recomposées font face à de multiples transitions.Au cœur de ces transitions, différents processus de redéfinition interactionnelle et mythique sont attendus. Parmi ceux-ci, la construction ... [more ▼]

Les familles recomposées font face à de multiples transitions.Au cœur de ces transitions, différents processus de redéfinition interactionnelle et mythique sont attendus. Parmi ceux-ci, la construction des nouvelles appartenances qui prévoit la gestion des ruptures ainsi que la construction de nouveaux repères affectifs et sociaux. Dans la pratique psychothérapeutique, nous rencontrons souvent des couples et des familles qui ont « mal » aux transitions et qui se proposent comme « suspendues » entre un passé non reproductible et un futur imperceptible. A travers des situations cliniques et de recherche avec des familles recomposées, l’intervention portera sur l’intérêt d’aborder ces transitions complexes à travers le concept de perte ambiguë. Ce travail prévoit, non pas tant une élaboration définitive des précédentes appartenances mais bien une co-création de ponts affectifs entre le passé et le présent, l’écriture de nouveaux scripts pour le futur ainsi que la gestion d’appartenances multiples et ce, également à travers la re-dynamisation de ressources et de potentialités évolutives chez les couples, familles et leurs réseaux. [less ▲]

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See detailRé-Créations Familiales: ruptures, pertes et nouvelles appartenances
D'Amore, Salvatore ULg

Conference (2014, November 14)

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See detailEconomic efficiency of milk production farms in Hanoi Suburbs, Vietnam
Le Dinh, Khan; Phan Dang, Thang ULg; Lebailly, Philippe ULg et al

Poster (2014, November 14)

Dairy production has presented in Vietnam since 50 years, but these dairy farms really developed from 2001. In the period 2001 – 2010, the average growth rate of dairy herds was up to 30% per year ... [more ▼]

Dairy production has presented in Vietnam since 50 years, but these dairy farms really developed from 2001. In the period 2001 – 2010, the average growth rate of dairy herds was up to 30% per year. However, fresh milk production satisfies about 20-25% of milk consumption. The rural areas of Hanoi Province are large for dairy production. This province builds the 7 agro-ecological sub-regions for the development of dairy farming, in which Ba Vi District is a most of sub-regions for dairy production development. But the average size is about 2.5 cows per farm. This research aims to better understand how the factors in milk sector adapt to current economic conditions in Hanoi suburbs through analyzing farming systems. These studies were conducted from January to August 2012 on 43 dairy farms with different production scales at Ba Vi District to characteristic of dairy farming systems. The data were collected by interviewing and keeping records at the farms that have milk production. The results showed that three dairy production systems in these zones: (1) Dairy small farming system has from 1 to 3 cows per farm; (2) The medium farming system has from 4 to 5 cows per farm; and (3) The dairy intensive farming system has more 5 cows per farm. The economic activities were really diversified with landless per household farm such as rice production, gardens, grass production and sylviculture. Land resources per farm of intensive farming system were largest including 9,239 m² for garden around the household; 2,574 m² for rice land; 563 m² of grass area and 3,325 m² for sylviculture. While the small farming system has the lowest potential land, each household has only 2,815 m² of garden; 1,795 m² of rice land; 2,095 m² of grazing land. The medium farming system has about 3,150 m² of garden; 2,220 m² of rice land and 3,891 m² of grazing land. Milk production cycle was quite long with intensive farming system, up to 324 days comparing with 299 days per cycle with medium farming system and to 306 days per cycle with small-scale farmers. This difference was not statistically signification (P> 0.05). Average milk production yield per cow was high with medium farming system (16 kg per cow per day) in comparison with 15 kg per day at intensive and small farming systems (P> 0.05). Milk production yield has been improved in the past years with crossbreed cows such as Holstein-Friesian 50% and 75%. But this productivity was still considered to be lower than the milk production yield with dairy cows raised in Moc Chau District under Son La Province with 20.5 kg per cow per day and 6,250 kg of milk per cow per cycle). In addition, in the period from 2006 to 2012, fresh milk prices at farm gate have continued to rise for the farmers, while feed prices increased in the period from 2006 to 2010 and these feed prices were stable between 2011 and 2012. In the period of 2006 to 2012, fresh milk prices at farm gate increased from 0.17 USD per kg in 2006 to 0.60 USD per kg in 2012 and feed prices were from 0.15 USD per kg in 2006 increasing to 0.39 USD per kg in 2012. The net incomes were calculated per a cow per year reached 1,274 USD with the small-scale farming households to 1,476 USD with medium farming system. The net income per kg of fresh milk at farm gate obtained from 0.28 USD with small farming system to 0.31 USD with medium farming system. The net household income was high from dairy production, from 2,437 USD per farm per year with small farming system to 5,487 USD per farm per year with intensive farming system. The net labor family income gained from 997 USD per active per year with small farming system to 2,757 USD per active per year with intensive farming system. Thus, dairy production farms in recent years in Hanoi Suburbs provide very high economic efficiency for farmers in comparison with other agricultural activities at the farms. This explains why the rate of dairy family farming has grown very fast in the studied zones in the period from 2009 to 2012. This trend will continue to grow in the future. This research was also showed that the price of fresh milk plays a crucial role for profitable at farm level. But medium farming system with the size from 4 to 5 dairy cows per farm is more profitable with current economic conditions at farms. [less ▲]

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See detailL’impact de la gestion des obstacles à la libre circulation des poissons
Ovidio, Michaël ULg

Conference (2014, November 13)

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See detailElectrical modelling of interface traps in GeSn MOS structures
Baert, Bruno ULg; Cerica, Delphine ULg; Schmeits, Marcel ULg et al

Conference (2014, November 13)

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See detailWhen food cultures meet. Ethnographic analysis of belongings and positionings.
Mescoli, Elsa ULg

Poster (2014, November 13)

The displacement of human beings is always accompanied by the movement of things and practices which travel with them. This is an obvious statement that indeed leads to interesting studies on the material ... [more ▼]

The displacement of human beings is always accompanied by the movement of things and practices which travel with them. This is an obvious statement that indeed leads to interesting studies on the material culture involved by people’s mobility. Within this culture are food habits, objects of numerous scholars’ researches often focusing on culinary changes (or resistances) linked to migration paths. Far for being the only issue at stake when studying migrant’s food practices – moreover frequently assumed as originally static prior to migration –, this matter is likely to overshadow other significant dynamics. Such as those which occur when supposedly different food cultures meet, thus leading to the mobilization of belongings by groups who want to take a specific position toward one another. My paper is aimed at analysing this encounter. The assumption is that it shapes a space which corresponds to a tertium quid, that is a dimension where not only the boundaries of food cultures fade, proving of an original indeterminacy and interchangeability of practices, but also where individuals constantly change their reciprocal position depending on the perspective of the gaze upon them. To show these dynamics, I will present the ethnographic data stemmed from my doctoral research about the culinary practices of a group of Moroccan migrant women living in Milan hinterland. I will support my presentation with visual materials collected during an eighteen month fieldwork which included observations and interviews inside homes as well as in public events such as an Arab cooking class. [less ▲]

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See detailApproche électro-physiologique non invasive des malformations du développement cortical: EEG
RIKIR, Estelle ULg

Conference (2014, November 13)

L’électro-encéphalogramme (EEG) de surface, technique non invasive et peu couteuse, demeure la pierre angulaire de la mise au point des épilepsies. Le développement de dispositifs d’enregistrement au ... [more ▼]

L’électro-encéphalogramme (EEG) de surface, technique non invasive et peu couteuse, demeure la pierre angulaire de la mise au point des épilepsies. Le développement de dispositifs d’enregistrement au moyen de 64 à 256 électrodes a permis d’augmenter considérablement la résolution spatiale de l’EEG de surface (Lantz et al., Clin Neurophysiol 2003). D’autre part, le développement de l’imagerie de source électrique (ISE) a permis au moyen de modèles mathématiques de localiser le générateur cortical responsable du signal EEG enregistré en surface (Scherg et al., 1990; Pascual-Marqui, 2002). Les malformations corticales (MCs) représentent un large spectre d’anomalies structurelles congénitales (Barkovich et al., Brain 2012) et constituent une des principales causes d’épilepsie de l’adulte (Spencer & Huh, Lancet Neurol 2008). Cette épilepsie s’avère malheureusement pharmaco-résistante dans la plupart des cas (85%) (Papayannis et al., Seizure 2012). Si les MCs sont hétérogènes d’un point de vue structurel (radiologique et anatomopathologique), les études électro-physiologiques (EEG) ont démontré que cette hétérogénéité existait également au niveau fonctionnel, non seulement entre les différents types de MCs mais aussi parfois au sein d’une même malformation. Les dysplasies corticales focales (DCF), hautement épileptogènes (Chassoux et al., Brain 2000; Aubert et al., Brain 2009), restent « invisibles » à l’IRM dans 30 à 50 % des cas (Hauptman et al., Epilepsia 2012). Dans ce cas, l’EEG de surface et l’ISE aident à la localisation du foyer épileptique (Brodbeck et al., Epilepsia 2010; Rikir et al.,Epilepsia 2014). Morphologiquement, aucune anomalie en EEG de surface n’est spécifique d’une DCF (Sisodiya et al., Lancet Neurol 2009). Les MCs, notamment les schizencéphalies et polymicrogyries, sont parfois très vastes et impliquent structurellement plusieurs régions lobaires et sous-lobaires, compliquant l’approche chirurgicale. L’EEG haute résolution couplé à l’ISE peut montrer le caractère hétérogène de la malformation en terme d’épilpetogénicité et désigner ainsi la partie impliquée dans les crises d’épilepsie (Rikir et al., 2014 ; Maillard et al., 2009). En cas de malformation multifocale (sclérose tubéreuse de Bourneville, hétérotopies nodulaires), les anomalies EEG critiques et inter-critiques désignent parfois une origine unifocale des crises épileptiques rendant éventuellement possible un traitement chirurgical. Enfin, il a été montré prospectivement que l’EEG haute densité couplé à l’ISE contribuait à localiser la zone épileptogène dans les épilepsies en rapport les MCs , qu’il présentait une valeur ajoutée par rapport à une mise au point classique basée sur l’enregistrement VIDEOEEG et l’IRM cérébrale, et qu’il était particulièrement indiqué en cas d’IRM négative ainsi qu’en cas de discordance entre hypothèses électro-cliniques (VIDEOEEG) et données structurelles (IRM) (Rikir et al., Epilepisa 2014). [less ▲]

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See detailSanté mentale et travail - les enjeux sociétaux
Mairiaux, Philippe ULg

Conference (2014, November 13)

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See detailIs there a global procedural learning deficit in children with Specific Language Impairment ?
Desmottes, Lise ULg; Maillart, Christelle ULg; Lejoly, Kelly ULg et al

Poster (2014, November 13)

The study of procedural learning abilities in children with Specific Language Impairment (Procedural Deficit Hypothesis, PDH; Ullman & Pierpont, 2005) remains a relatively unexplored field of research ... [more ▼]

The study of procedural learning abilities in children with Specific Language Impairment (Procedural Deficit Hypothesis, PDH; Ullman & Pierpont, 2005) remains a relatively unexplored field of research. Since most evidence comes from studies using tasks which involve learning of sequenced patterns, research using other procedural learning paradigms (like motor adaptation tasks) is needed to further evaluate the PDH in children with Specific Language Impairment (SLI). Therefore, in this study, we examined the ability of children with and without SLI to learn, consolidate and generalize a mirror-tracing task, a paradigm that does not involve sequence learning and had never been used in SLI. Children with SLI and typical developing (TD) matched children participated in the study. Children with SLI were included if they scored below -1.25 SD of the expected normative performance in at least 2 language areas. Both groups had to trace ten 5-pointed stars seen only in mirror-reversed view in two learning sessions separated by a one-week delay. The transfer phase consisted in tracing a new figure. The time required to complete the tracing, and the number of errors committed were recorded. Full results will be presented and discussed during the presentation of the paper. [less ▲]

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See detailInfluence de la vitesse de croissance sur le classement de lames de bardage de Douglas wallon (Belgique)
Pollet, Caroline; Henin, Jean-Marc; Hebert, Jacques ULg et al

Poster (2014, November 12)

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See detailLa francophonie dans tous ses états
Baiwir, Esther ULg

Conference (2014, November 12)

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See detailChocolate : Natural but also chemical product…
Echterbille, Julien ULg

Conference (2014, November 12)

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See detailDISTRIBUTION OF CAPSULAR POLYSACCHARIDES OF STREPTOCOCCUS AGALACTIAE STRAINS FROM URUGUAY. MULTIPLEX PCR VERSUS CONVENTIONAL CAPSULAR SEROTYPING
Rodriguez Cuns, Grisel ULg; BOREUX, Raphaël ULg; ADAMS, Pauline et al

in XIX Lancefield International Symposium on Streptococci and Streptococcal Diseases, Program and Abstract book (2014, November 11)

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See detailSmart cross-linked polymer micelles for drug delivery
Riva, Raphaël ULg; Vanslambrouck, Stéphanie ULg; Ergül, Zeynep ULg et al

Conference (2014, November 11)

Nowadays, polymer crosslinking is widely used in industry to improve or to impart new properties to existing polymer material. In the pharmaceutical field, polymer crosslinking is of great interest for ... [more ▼]

Nowadays, polymer crosslinking is widely used in industry to improve or to impart new properties to existing polymer material. In the pharmaceutical field, polymer crosslinking is of great interest for the elaboration of drug delivery devices, mostly hydrogels. Nevertheless, crosslinking is also very useful in nanovectorization of active principle. Indeed, each day, new drugs are synthesized and available on the market but in too many cases, the high hydrophobicity of some drugs makes them useless because of the absence of an appropriated administration method. The encapsulation of the drug into a nanocarrier, typically in the hydrophobic core of a polymer micelle, allows a significant increase of the drugs concentration in water in addition to the protection of the active principle against degradation. However, polymer micelles suffer of the main drawback to not be stable, leading to a premature release of the drug, when the concentration falls down the critical micellar concentration (CMC), which it is rapidly observed after intravenous injection. In order to get rid of the CMC, crosslinking of the micelle core is the most proposed strategy. Nevertheless, the crosslinking of the micelle core may have a non-negligible effect on the drug loading but mainly on the drug release due to the sequestration of the drug in the network. Over the last years, our lab investigated several strategies for the crosslinking of the micelle core made of amphiphilic and biocompatible block copolymers generally by UV radiation in order to fulfill the increasingly stringent requirements of biomedical applications. These strategies are very helpful to prepare injectable nanosized cross-linked particles loaded with an active particle. For some systems, the effect of the crosslinking rate on the drug loading and the drug release was evaluated using a model drug. As the crosslinking may interfere with the drug release after internalization of the carrier into the cell, a reversible crosslinking of the micelle core was proposed. Typically, the introduction of disulfide bond as inter-chain links allowed to delay the drug release by diffusion whereas into the cell, the reduction of the disulfide bridges into corresponding thiol led to the fast disassemble of the micelle and the specific release of the drug into cytoplasm. [less ▲]

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See detailWork Integration and Social Enterprises: dynamics and challenges in Europe
Rijpens, Julie ULg

Conference (2014, November 10)

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See detailPratiques et stratégies alimentaires dans l'Antiquité tardive : l'apport de la papyrologie
Marganne, Marie-Hélène ULg

Conference (2014, November 10)

Sans équivalent dans le monde antique et tardo-antique en raison des conditions climatiques favorables de l’Égypte, les sources papyrologiques, qu'elles soient littéraires, documentaires, magiques ou ... [more ▼]

Sans équivalent dans le monde antique et tardo-antique en raison des conditions climatiques favorables de l’Égypte, les sources papyrologiques, qu'elles soient littéraires, documentaires, magiques ou chrétiennes, écrites en grec, en latin ou même en copte, fournissent de nombreuses informations sur les denrées alimentaires, non seulement produites et importées dans le Pays du Nil durant la période byzantine (à partir de l'accession au principat de Dioclétien, en 284, jusqu'à la conquête arabe, en 641), mais également exportées et consommées dans le reste de l'Empire romain et dans d’autres contrées, ainsi que sur la manière de les utiliser. Après avoir inventorié les papyrus contenant des références à des produits alimentaires, leur genre, leur provenance, leur forme, leur langue et leur écriture, à l'aide de quelques exemples, on s’interrogera sur leur contenu et sur ce qu’il révèle des pratiques et stratégies alimentaires d’une société multiculturelle (Égyptiens, Grecs, Romains, Juifs, etc.) depuis l’époque hellénistique, de l’internationalisation et de l’intensification des relations commerciales sous l’Empire romain, sans oublier l’influence des préceptes religieux. [less ▲]

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See detail« Roman policier métaphysique et récit de l’échec »
Dechene, Antoine ULg

Conference (2014, November 09)

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See detailThe Airline Container Loading Problem with Pickup and Delivery
Lurkin, Virginie ULg; Schyns, Michael ULg

Conference (2014, November 09)

We address the problem of allocating containers into predefined positions of a carrier, in this case aircraft, under several realistic structural and safety constraints. The originality of our approach is ... [more ▼]

We address the problem of allocating containers into predefined positions of a carrier, in this case aircraft, under several realistic structural and safety constraints. The originality of our approach is to allow multi-trips with pickup and delivery at some intermediate locations. The objective is to minimize the economic and environmental costs including the impact of the intermediate operations. We resort to an integer linear model. Numerical experiments have been performed using a standard B\&C library. Heuristics are developed to speed up the process. [less ▲]

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See detailUse of lipid probes as matrices for MALDI Imaging applications
Longuespée, Rémi ULg; Alberts, Deborah ULg; Pottier, Charles et al

Poster (2014, November 07)

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See detailDe la sociologie de la littérature à une sociologie par la littérature
Ledent, David ULg

Conference (2014, November 07)

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See detailRetrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations
Franco, Bruno ULg; Hendrick, François; Van Roozendael, Michel et al

Conference (2014, November 07)

As a ubiquitous product of the oxidation of many Volatile Organic Compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive intermediate in the atmospheric photo-oxidation ... [more ▼]

As a ubiquitous product of the oxidation of many Volatile Organic Compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive intermediate in the atmospheric photo-oxidation pathways leading to the formation of tropospheric ozone and secondary organic aerosols. We have successfully retrieved HCHO columns from ground-based Fourier Transform Infrared (FTIR) solar spectra and UV-Visible Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) scans recorded during the July 2010 – December 2012 time period at the Jungfraujoch station (Swiss Alps, 46.5 °N, 8.0 °E, 3580 m a.s.l.). Characterization of the retrieved products has revealed different vertical sensitivity between both remote sensing techniques. Furthermore, HCHO amounts simulated by two state-of-the-art Chemical Transport Models (CTMs), GEOS-Chem and IMAGESv2, have been compared to FTIR total columns and MAX-DOAS 3.6 – 8 km partial columns, accounting for the respective vertical resolution of each ground-based instrument. Using the CTMs outputs as intermediate, FTIR and MAX-DOAS retrievals have shown consistent seasonal modulations of HCHO throughout the investigated period, characterized by summertime maximum and wintertime minimum. Such comparisons have also highlighted that FTIR and MAX-DOAS provide complementary products for HCHO above the Jungfraujoch station. [less ▲]

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See detailLes lettres des tirailleurs rwandais
Singiza, Dantès ULg

Conference (2014, November 07)

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