References of "Scientific congresses and symposiums"
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See detailUne charte en six principes pour guider la mise en œuvre des programmes visant le développement de compétences dans l’enseignement supérieur
Poumay, Marianne ULg; Scheffers, Patricia ULg; Georges, François ULg

Conference (2016, June 08)

Dans l’enseignement supérieur, les programmes se structurent de plus en plus autour de référentiels de compétences, que ces derniers constituent des prescrits légaux ou des choix institutionnels. Mais la ... [more ▼]

Dans l’enseignement supérieur, les programmes se structurent de plus en plus autour de référentiels de compétences, que ces derniers constituent des prescrits légaux ou des choix institutionnels. Mais la cohérence entre le référentiel et le programme est parfois mince. Il arrive en effet que les contraintes de terrain prennent le pas sur les intentions de changement, rendant impossible une réelle « approche visant le développement de compétences » (APC). Force est aussi de constater combien il est complexe de dériver un programme cohérent au départ d’un référentiel de compétences. Pour aider les équipes enseignantes, lors de la refonte d’un programme, à garder le cap sur la notion de compétence telle que définie par Tardif (2006), le LabSET a élaboré une charte en six principes. Cette charte a été utilisée par une dizaine d’équipes libanaises et égyptiennes dans le projet ADIP, lors de la construction de quatre Masters. Les six principes y ont été assortis de recommandations qui président à leur mise en œuvre concrète et serviront de points de repères lors de l’évaluation des programmes. Notre communication partira de ces six principes et de leurs fondements théoriques. Elle explicitera ensuite leur adaptation aux programmes de banque-finance de deux universités libanaises, à travers leur traduction en recommandations concrètes. Elle les illustrera enfin par le cas des architectes de l’ULg, soulignant notamment parmi ces principes ceux qui semblent les plus complexes à mettre en œuvre. [less ▲]

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See detailAg/SiO2 and Cu/SiO2 cogelled xerogel catalysts for benzene combustion and 2-butanol deshydrogenation
Mahy, Julien ULg; Claude, Vincent ULg; Tasseroul, Ludivine ULg et al

Poster (2016, June 08)

Tars are recognized as major impurities when biomass is gazified into Syngas (mixture CO + H2) or when the methane reforming was produced from sustainaible reagents [1]. Therefore, fundamental knowledge ... [more ▼]

Tars are recognized as major impurities when biomass is gazified into Syngas (mixture CO + H2) or when the methane reforming was produced from sustainaible reagents [1]. Therefore, fundamental knowledge of catalytic oxidation and deshydrogenation mechanisms can be valuable to develop effective methods to control syngas or methane pollution. A very important concern about cogelled catalysts is the accessibility of the active centers. Because the silver and copper is located inside silica particles, there is a risk that it may not be accessible. In the case of benzene oxidation, it was observed that the specific activity (mol s-1 g-1Ag) of Ag/SiO2 and Cu/SiO2 catalysts increases when the silver or copper loading decreases (Fig. 1). In fact, visual observations by TEM showed that in samples Ag0.25, Ag0.45, Ag1.05 and Cu1.00, there are not silver or copper particles located on silica particles external surface and then the metal dispersion values are greater in these samples. So, it is the proof that Ag and Cu particles located inside the silica particles are accessible for benzene in this catalytic system. In the case of 2-butanol dehydrogenation, the specific activity of Cu/SiO2 catalysts increases when the copper loading increases or when the metal dispersion values decreases (Fig. 2). However, in Cu1.00 sample, copper particles inside silica particles only are observed by TEM. It seems that these metallic particles are accessible for 2-butanol in this catalytic system. [less ▲]

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See detailPrediction of intra- and inter-laminar failure of laminates using non-local damage-enhanced mean-field homogenization simulations
Wu, Ling ULg; Sket, Federico; Adam, Laurent et al

Conference (2016, June 08)

The failure of carbon fiber reinforced composites with a quasi-isotropic sequence ([90/45/-45/90/0]S) and open-hole geometry is studied using a multiscale method [1]. On the one hand, the intra-laminar ... [more ▼]

The failure of carbon fiber reinforced composites with a quasi-isotropic sequence ([90/45/-45/90/0]S) and open-hole geometry is studied using a multiscale method [1]. On the one hand, the intra-laminar failure is captured using a damage-enhanced mean-field homogenization scheme. To this end, each ply is modeled as a homogenized material whose anisotropic damage behavior is captured from the homogenization method [2]. In order to avoid the problem of loss of solution uniqueness the mean-field homogenization process is formulated in the context of the non-local continuum damage theory [3]. On the other hand, an hybrid discontinuous Galerkin/extrinsic cohesive law method is used to model the delamination process at the ply interfaces. This hybrid method avoids the need to propagate topological changes in the mesh with the propagation of the delamination while it preserves the consistency and stability in the un-cracked interfaces. As a result, the multiscale framework allows predicting damage propagation directions in each ply along the fiber directions accordingly to the experimental results as it is demonstrated by considering an openhole [90/45/-45/90/0]S-laminate studied both numerically and experimentally. [1] L. Wu, et al., Composite Struct., 126, 246–264, 2015. [2] L. Wu, L. Noels, L. Adam, I. Doghri, Int. J. of Solids and Struct., 50, 3843-3860, 2013. [3] R. Peerlings, et al., Int. J. for Numer. Meth. in Eng., 39, 3391-3403, 1996 [less ▲]

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See detailThe MAR model performances over Belgium
Wyard, Coraline ULg; Fettweis, Xavier ULg

Conference (2016, June 08)

This presentation deals with the set-up of the regional climate model MAR over Belgium. It also presents the performances of MAR to simulate the present-day climate following three reanalysis used as ... [more ▼]

This presentation deals with the set-up of the regional climate model MAR over Belgium. It also presents the performances of MAR to simulate the present-day climate following three reanalysis used as forcing of the model (ERA-Interim, ERA-20C and NCEP/NCAR-v1). [less ▲]

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See detailFire Resistance of Reinforced Concrete Columns Subjected to Standard Fire – Comparison of an Advanced and a Simplified Method
Achenbach, Marcus; Gernay, Thomas ULg; Morgenthal, Guido

in Garlock, Maria; Kodur, Venkatesh (Eds.) Structures in Fire (Proceedings of the Ninth International Conference) (2016, June 08)

For designing concrete columns subjected to a standard fire exposure, the Eurocode permits the use of simplified or advanced calculation methods. For the designer, the question of the respective ... [more ▼]

For designing concrete columns subjected to a standard fire exposure, the Eurocode permits the use of simplified or advanced calculation methods. For the designer, the question of the respective advantages of these two types of methods arises. Which situations demand the use of an advanced method? When does a simple method provide sufficient accuracy? In this paper, laboratory tests are recalculated using Finite Element Modeling (FEM) as an advanced and Extended Zone Model (EZM) as a simple method in order to investigate these questions. The recalculations indicate that the simple EZM is of sufficient accuracy for symmetric heated columns without restraints. In contrast, the mechanical behavior of columns heated on three sides demands an advanced method such as FEM to be properly described. [less ▲]

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See detailApproche psychocriminologique et légale du processus de radicalisation
Garcet, Serge ULg

Conference (2016, June 08)

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See detailCatalytic reforming of biomass gasification tars with bi- or tri-doped catalysts optimized with organosilane precursors
Claude, Vincent ULg; Courson, Claire; Heinrichs, Benoît ULg et al

Conference (2016, June 08)

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO + H2) since this process presents the advantage of being renewable without ... [more ▼]

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO + H2) since this process presents the advantage of being renewable without emitting CO2. However, in practical applications, there are still some technical problems due to high tars concentration in the outlet gas which can condensate and clog the pipes. Many studies have highlighted the fact that the tar elimination via catalytic reforming seem to be the more practical and economical solution. The required properties of the catalysts are determined by its location: inside the reactor (primary catalyst) or outside of the reactor (secondary catalyst). Primary catalysts are generally robust, non-toxic, cheap and they are almost uniquely destined to fluidized bed reactors. Secondary catalysts can be used at the exit of both fluidized and fixed bed reactors. They are characterized by a tailored mesoporous shape, a controlled active site dispersion and an adapted elemental composition [1]. In this work , we decided to focus on designing materials for secondary catalytic applications, i.e. working at relatively low temperature (~650°C) with no mechanical stress. The supports were made of γ-Al2O3 synthesized via an easy Sol-Gel method. During their synthesis, these supports were doped with 10%wt of nickel and various combinations of metallic dopants (Co, Cu, Fe, Mn, Mo) in the aim of enhancing their catalytic activities and lifetime. [less ▲]

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See detailMise en œuvre de l’approche par compétences en tension
Georges, François ULg; Homburg, David ULg; Poumay, Marianne ULg

Conference (2016, June 08)

De nombreux établissements d’enseignement supérieur s’engagent dans la réforme de leurs cursus selon une approche par compétences (APC). Dans le meilleur des cas, ces réformes s’ancrent dans des contextes ... [more ▼]

De nombreux établissements d’enseignement supérieur s’engagent dans la réforme de leurs cursus selon une approche par compétences (APC). Dans le meilleur des cas, ces réformes s’ancrent dans des contextes porteurs. Elles sont soutenues par la direction et le corps professoral. Le monde professionnel les encourage. Des équipes guidées par des conseillers pédagogiques sont constituées pour les mettre en œuvre. Malgré ce contexte porteur, force est de constater que la mise en œuvre de l’APC se heurte régulièrement à une série de tensions nées de l’opposition entre plusieurs valeurs. L’institution est ainsi tiraillée entre son souhait de répondre rapidement aux conditions d’accréditation et sa volonté de prendre le temps de réformer en profondeur ses cursus. Les enseignants sont quant à eux tiraillés entre la volonté de mieux préparer les étudiants au monde professionnel et leurs difficultés à penser autrement leurs cours et leurs évaluations (Scallon, 2015). Les étudiants sont eux-mêmes tiraillés entre leur intérêt pour une approche centrée sur leur progression et leur envie de réussir à moindres frais. Toutes ces tensions se nourrissent par ailleurs de représentations sur ce qu’est apprendre ou encore sur qu’est une bonne université, un bon enseignant, un bon étudiant et un bon professionnel. Les étapes clés qui président à l’édification d’un référentiel compétences (Tardif, 2006) serviront de fil rouge à notre présentation. Pour chacune de ces étapes (choix des compétences, des composantes essentielles, des situations professionnelles, des niveaux de développement, des apprentissages critiques et des ressources), nous illustrerons les tensions rencontrées par des équipes éducatives à travers l’exemple de HEC-Ecole de gestion de l’université de Liège et d’autres équipes engagées dans ce type de réforme. [less ▲]

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See detailSet theory and foundational mereology as logical tools for descriptive psychology
Leclercq, Bruno ULg

Conference (2016, June 07)

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See detailDe l'avatar au personnage : regards croisés entre game studies et études littéraires
Dozo, Björn-Olav ULg; Delbouille, Julie ULg

Conference (2016, June 07)

Si les game studies se sont développées en prenant appui, dans un premier temps, sur les études littéraires et en particulier sur la narratologie (Ryan 2004, Atkins et Krzywinska 2007) pour interroger la ... [more ▼]

Si les game studies se sont développées en prenant appui, dans un premier temps, sur les études littéraires et en particulier sur la narratologie (Ryan 2004, Atkins et Krzywinska 2007) pour interroger la notion de récit appliquée au jeu vidéo, elles ont ensuite fait appel à d’autres disciplines (psychologie et sociologie en particulier) pour construire leur approche de certaines notions, dont celle d’avatar qui nous paraît utile dans le cadre de recherches sur le personnage en littérature. Confrontées à des objets irréductibles à leur textualité (l’étude de la composante « play » du jeu a pris le pas sur celle du « game », surtout en francophonie – voir à ce sujet Triclot, 2011), les game studies se sont dotées d’outils et de théories propres, réélaborant pragmatiquement certaines notions à partir de théories antérieures (les « univers fictionnels », voir Barnabé, 2014) ou forgeant des concepts spécifiques (l’« impératif d’action », voir Genvo, 2005). Dans cette communication, nous souhaitons mobiliser une série de réflexions récentes sur la notion d’avatar vidéoludique pour les étendre à l’étude des personnages au sein de la littérature contemporaine. [less ▲]

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See detailSmall-scale heritage; the canary in the coalmine.
Gantois, Gisele ULg; Schoonjans, Yves

Conference (2016, June 07)

Flanders, a Belgian region, has a historically grown dense network of routes and paths, linking towns and villages on an average one-day walking distance. Within the fabric we detect numerous small-scale ... [more ▼]

Flanders, a Belgian region, has a historically grown dense network of routes and paths, linking towns and villages on an average one-day walking distance. Within the fabric we detect numerous small-scale historical buildings and industrial relicts with an identity importance way beyond the artefact itself, representing an old mesh, entwined with societal narratives. Through newly developed methodologies we both examine the importance of this daily collectively used mesh and unveil and carefully map new complex realities such as the increasing ‘requisition’ of rural built heritage and the reframing of its boundaries as a tangible warning of a continuous urbanisation process. [less ▲]

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See detailCohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework
Leclerc, Julien ULg; Wu, Ling ULg; Noels, Ludovic ULg et al

Conference (2016, June 07)

Numerical modelling of the complete ductile failure process is still a challenge. On the one hand, continuous approaches, described by damage models, succeed in the initial diffuse damage stage but are ... [more ▼]

Numerical modelling of the complete ductile failure process is still a challenge. On the one hand, continuous approaches, described by damage models, succeed in the initial diffuse damage stage but are still unable to represent physical discontinuities. On the other hand, discontinuous approaches, such as the cohesive zone models, are able to represent the crack propagation behaviour. They are suited for local damaging processes as crack initiation and propagation, and so, fail in diffuse damage prediction of ductile materials. Moreover, they do not usually capture triaxiality effects, mandatory for accurate ductile failure simulations. To describe the ductile failure process, the numerical scheme proposed here combines both approaches [1] in order to beneficiate from their respective advantages: a non-local damage model combined with an extrinsic cohesive law in a discontinuous Galerkin finite element framework. An application example of this scheme is shown on the attached figure. The initial diffuse damage stage is modelled by an implicit nonlocal damage model as suggested by [2]. Upon damage to crack transition, a cohesive band [3] is used to introduce in-plane stretch effects inside the cohesive law or in other words, a triaxiality-dependent behaviour. Indeed, these in-plane strains play an important role during the ductile failure process and have to be considered. Concretely, when crack appears in the last failure stage, all the damaging process is assumed to occur inside a thin band ahead of the crack surface. Thanks to the small but finite numerical band thickness, the strains inside this band can be obtained from the in-plane strains and from the cohesive jump. Then, the stress-state inside the band and the cohesive traction forces on the crack lips are deduced from the underlying continuum damage model. The band thickness is not a new material parameter but is computed to ensure the energetic consistency during the transition. [1] Wu L, Becker G, Noels L. Elastic damage to crack transition in a coupled non-local implicit discontinuous Galerkin/extrinsic cohesive law framework. Comput. Methods Appl. Mech. Eng. 279 (2014): 379–409 [2] Peerlings R., de Borst R., Brekelmans W., Ayyapureddi S. Gradient-enhanced damage for quasi-brittle materials, Int. J. for Num. Methods in Eng. 39 (1996): 3391-3403 [3] Remmers J. J. C., de Borst R., Verhoosel C. V., Needleman A. The cohesive band model: a cohesive surface formulation with stress triaxiality. Int. J. Fract. 181 (2013): 177–188 [less ▲]

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See detail50Hz EMF and public health policy: The involvement of the Belgian BioElectroMagnetics Group
Ledent, Maryse ULg; Maes, Annemarie; De Ridder, Maurits et al

Poster (2016, June 07)

The BBEMG website (www.bbemg.be) aims to present the results of the research teams of the Belgian BioElectroMagnetics Group, to inform about electric and magnetic fields and their potential health effects ... [more ▼]

The BBEMG website (www.bbemg.be) aims to present the results of the research teams of the Belgian BioElectroMagnetics Group, to inform about electric and magnetic fields and their potential health effects, and to become a centre of documentation and education able to provide understandable and correct information regarding 50 Hz electric and magnetic fields to the general public, physicians, scientists, public officials... This paper is focusing on the involvement of the BBEMG through its website in the Belgian public policy, its identified goals and how it is implemented and evaluated. Challenges will also be analysed. [less ▲]

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See detailMultifractal analysis of the divergence of wavelet series
Esser, Céline ULg

Conference (2016, June 07)

In this talk, we study pointwise divergence properties of wavelet expansions of functions in a given Besov space. We obtain deterministic upper bounds for the Hausdorff dimensions of the sets of points ... [more ▼]

In this talk, we study pointwise divergence properties of wavelet expansions of functions in a given Besov space. We obtain deterministic upper bounds for the Hausdorff dimensions of the sets of points where a given rate of divergence is observed, and we show that these bounds are generically (in the sense of Baire's categories) optimal. This gives a complement to the works done by F. Bayart and Y. Heurteaux in the case of Fourier series and by J.M. Aubry. [less ▲]

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See detailOn the α-polarization of bacterial suspensions: SIP measurements on four bacterial strains
Pilawski, Tamara ULg; Tappe, Wolfgang; Zimmermann, Egon et al

Poster (2016, June 06)

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See detailMOISTURE CONTENT DETERMINATION OF FREEZE-DRIED PRODUCTS BY NEAR-INFRARED SPECTROSCOPY: A CASE STUDY FOR UNIVERSAL REGRESSION MODEL
Clavaud, Matthieu ULg; Roggo, Yves; Degardin, Klara et al

Poster (2016, June 06)

Karl Fischer titration is the reference method for moisture content determination in the pharmaceutical industry. Near-infrared spectroscopy is considered the most suitable alternative technique. Indeed ... [more ▼]

Karl Fischer titration is the reference method for moisture content determination in the pharmaceutical industry. Near-infrared spectroscopy is considered the most suitable alternative technique. Indeed, NIRS is a safe and fast method which does not require sample preparation. Nevertheless, the development and validation phases are time-consuming. In addition, the NIRS methods presented so far were mostly product specific. The main objective of this study is to highlight that an universal calibration model can be validated for several freeze-dried products in order to speed up the validation time. This objective was led in two steps. A universal model was first evaluated. A calibration set and a validation set were built up with three freeze-dried products. An antibody drug conjugate, a large molecule and a small molecule all packed in sealed vials were used to introduce more variability. Regression methods were then compared in order to optimize the prediction values. [less ▲]

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See detailEmbedded solids of any dimension in the X-FEM defined on higher-order approximations
Duboeuf, Frédéric ULg; Béchet, Eric ULg

Conference (2016, June 06)

Embedded interface methods bring a significant simplification of the modelling process before analysis. Complex geometries and moving boundaries may be described with great flexibility, reducing the ... [more ▼]

Embedded interface methods bring a significant simplification of the modelling process before analysis. Complex geometries and moving boundaries may be described with great flexibility, reducing the meshing step to that of a simple bounding box. Following this idea – to dissociate the field approximation from the geometric description – manifolds of different dimensions may be embedded in the same bulk mesh. However, special attention should be given to the difference of dimensions between that of problem domain and that of bulk mesh (the codimension). Whereas the direct use of the shape functions of the bulk mesh is possible for a problem domain of codimension zero, this approach is no longer possible in other configurations, for instance a beam in a 3D mesh. Unlike approaches introducing independent overlapping meshes for each subdomain, function spaces may be built from the traces of higher dimensional spaces built upon the bulk mesh. For closed curves in 2D and closed surfaces in 3D, the resulting discrete method based on P1 FE have already been studied in the literature. To avoid badly conditioned linear systems, specific treatments are required, e.g. preconditioning approaches or stabilization techniques. Here, we propose to deplete wisely the trace space. We investigate higher-order function spaces to solve the diffusion equation in embedded solids of any codimension. A new space-reducer algorithm is introduced to design the dedicated spaces that avoids ill-conditionning while treating boundary conditions. We present the results of several numerical experiments with convergence analyses. To conclude, applications of this technique to embedded beams or shells is discussed. [less ▲]

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See detailA Stochastic Multi-scale Model For Predicting MEMS Stiction Failure
Hoang Truong, Vinh ULg; Paquay, Stéphane; Golinval, Jean-Claude ULg et al

in Proceedings of the SEM XIII International Congress and Exposition on Experimental and Applied Mechanics. (SEMXIII 2016) (2016, June 06)

Adhesion is an important phenomenon in the context of MEMS for which the surface forces become dominant in comparison with the body forces. Because the magnitudes of the adhesive forces strongly depend on ... [more ▼]

Adhesion is an important phenomenon in the context of MEMS for which the surface forces become dominant in comparison with the body forces. Because the magnitudes of the adhesive forces strongly depend on the surface interaction distances, which in turn evolve with the roughness of the contacting surfaces, the adhesive forces cannot be determined in a deterministic way. To quantify the uncertainties on the structural stiction behavior of a MEMS, this work proposes a “stochastic multi-scale methodology”. The key ingredient of the method is the evaluation of the random meso-scale apparent contact forces, which homogenize the effect of the nano-scale roughness and are integrated into a numerical model of the studied structure as a random contact law. To obtain the probabilistic behavior at the structural MEMS scale, a direct method needs to evaluate explicitly the meso-scale apparent contact forces in a concurrent way with the stochastic multi-scale approach. To reduce the computational cost, a stochastic model is constructed to generate the random meso-scale apparent contact forces. To this end, the apparent contact forces are parameterized by a vector of parameters before applying a polynomial chaos expansion in order to construct a mathematical model representing the probability of the random parameters vector. The problem of miro-beam stiction is then studied in a probabilistic way. [less ▲]

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See detailNumerical Properties of a Discontinuous Galerkin formulation for electro-thermal coupled problems
Homsi, Lina; Geuzaine, Christophe ULg; Noels, Ludovic ULg

in Papadrakakis, M.; Papadopoulos, V.; Stefanou, G. (Eds.) et al Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering, Crete Island, Greece, 5–10 June 2016 (2016, June 05)

Discontinuous Galerkin (DG) methods are attractive tools to integrate several PDEs in engineering sciences, due to their high order accuracy and their high scalability in parallel simulations. The main ... [more ▼]

Discontinuous Galerkin (DG) methods are attractive tools to integrate several PDEs in engineering sciences, due to their high order accuracy and their high scalability in parallel simulations. The main interest of this work is to derive a constant and stable Discontinuous Galerkin method for two-way electro-thermal coupling analyses. A fully coupled nonlinear weak formulation for electro-thermal problems is developed based on continuum mechanics equations which are discretized using the Discontinuous Galerkin method. Toward this end, the weak form is written in terms of energetically conjugated fields gradients and fluxes. In order to validate the effectiveness of the formulation and illustrate the algorithmic properties, a numerical test for composite materials is performed. [less ▲]

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See detailRewriting History in the Time of Late Capitalism: Uses and Abuses of Built Heritage : introduction to the session
Houbart, Claudine ULg; Dawans, Stéphane ULg

Conference (2016, June 05)

With his expression ceci tuera cela, Hugo established almost two centuries ago a strong link between words and stones as transmission vehicles of human memory. We heritage experts would be inclined to ... [more ▼]

With his expression ceci tuera cela, Hugo established almost two centuries ago a strong link between words and stones as transmission vehicles of human memory. We heritage experts would be inclined to consider stones as more reliable than words, what semiology seems to confirm : stones are clues, and clues are, according to Roland Barthes, tangible proves of “what has been”. But the inspector Columbo has often shown how we can play with these clues, and Umberto Eco would easily forgive us this incursion into mass culture to agree on the idea that we can rewrite history using false justified clues, that is also, tangible heritage. Since the emergence of the restoration discipline, experts have been aware of the danger of falsification : Ruskin’s texts, Boito’s philological restoration, Brandi’s historical instance or the Venice charter are so many illustrations of this concern. But since the 1990’s in Europe, a growing number of restoration and reconstruction projects very clearly depart from this fundamental idea. Of course, the collapse of the Soviet bloc has created a particular political context in which (re-)emerging nations attempted to (re-)build their identity through architectural symbols (leading to the writing of the Riga charter). But more generally, this phenomenon is closely linked to the cultural context : on the one hand, the postmodern movement has deeply questioned the idea of “sincerity”, with a tendency to blur the limits between true and false and, as a consequence, between original and copy. And on the other hand, in the heritage sphere, the globalisation of the debate progressively rattled european certitudes about concepts as essential as authenticity, leading to the replacement of the self-confidence expressed by the Venice charter by a careful relativism, illustrated by the Nara document thirty years later. These contemporary phenomenons have important side effects. In the context of late capitalism, heritage has become a major economic issue, especially as many cities have well understood its potentialities in terms of city branding. This could of course be seen as a positive opportunity for heritage conservation ; nevertheless, a rich scientific literature has shown that tourism can deeply transform our representation of the past. The tourist is a client rather than an amateur, and his quest of authenticity is often satisfied by what the French philosopher Yves Michaud has called “adulterated authenticity”, the one from over-restored monuments, reconstructed city centres, eco-museums, and, why not, theme parks. More than authentic built remains, the “tourist gaze” shapes more and more our representation of “what has been”, and the arguments developed by heritage experts in response to globalisation and identity issues are seized upon by city marketing specialists willing to meet a mostly commercial demand, sometimes tinged with dubious political motivations. What we intend to question in this session is the limit between uses and abuses of heritage and heritage discourse and more particularly whether, as suggested by Theodore Scaltsas’ inspiring paper “Identity, origin and spatiotemporal continuity” (1981), the intentions underpinning restoration and reconstruction projects affect the very essence of restored or reconstructed objects. Besides architectural history and conservation theory, we welcome contributions in the fields of sociology, anthropology, philosophy, history, political sciences, geography, tourism economy and even psychology. [less ▲]

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See detailLe cadre et l'oubli : Mallarmé après Mallarmé
Durand, Pascal ULg

Conference (2016, June 04)

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See detailDoes formal 0-3 years old child care availability boost employment rate of mothers ? Panel data based evidence from Belgium
Dujardin, Claire; Fonder, Muriel; Lejeune, Bernard ULg

Conference (2016, June 03)

In 2003, a new multi-annual program aimed at increasing the availability of formal child care for 0-3 year old children was launched in Wallonia, the French-speaking part of Belgium. This paper is ... [more ▼]

In 2003, a new multi-annual program aimed at increasing the availability of formal child care for 0-3 year old children was launched in Wallonia, the French-speaking part of Belgium. This paper is interested in evaluating if this increased availability of formal child care resultedin a higher employment rate for women with at least one child under 3. To this end, we use a difference-in-differences approach based on municipality-level panel data, taking advantage of the fact that the increase in availability of formal child care differed greatly across municipalities. We find that the raise in child care availability significantly increased the maternal employment rate, but to a lesser extent than expected, most likely because of a substantial crowding-out effect. [less ▲]

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See detailUn portfolio de traces pour démontrer la compétence de l'étudiant
Poumay, Marianne ULg

Conference (2016, June 03)

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See detailTensions in nascent social enterprises: Looking beyond the social-economic duality
Dufays, Frédéric ULg

Conference (2016, June 03)

Hybrid organizations, social enterprises in particular, have often been described as crystallizing tensions due to the institutional pluralism they seek to integrate internally. This paper aims to ... [more ▼]

Hybrid organizations, social enterprises in particular, have often been described as crystallizing tensions due to the institutional pluralism they seek to integrate internally. This paper aims to identify, locate and explain the organizational tensions faced by nascent social entrepreneurial teams through a multiple-case study. The findings show that the types and patterns of tensions differ according to team size and to the strength of ties binding team members. In the specific context of social enterprises, the research discriminates between mutual interest and general interest social mission, which is identified as a factor influencing tension development. Further, the analysis suggests that tensions tend to be located within a particular logic (social welfare in this case) rather than between logics, as often suggested in the literature. As such, it contributes to the literatures on hybrid organizations and social enterprises by portraying more complex interplays between and within plural – particularly social and commercial – logics. [less ▲]

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See detailL’iconologie face aux signes (Warburg, Panofsky, Gombrowicz, Ginzburg)
Hagelstein, Maud ULg

Conference (2016, June 03)

Dans son article intitulé « Traces. Racines d’un paradigme indiciaire » (1979), Carlo Ginzburg actait l’émergence progressive d’un modèle épistémologique « apparu silencieusement » à la fin du XIXe siècle ... [more ▼]

Dans son article intitulé « Traces. Racines d’un paradigme indiciaire » (1979), Carlo Ginzburg actait l’émergence progressive d’un modèle épistémologique « apparu silencieusement » à la fin du XIXe siècle, mettant l’examen des détails au centre des exigences du champ des sciences humaines. Loin d’être insignifiants ou distrayants, loin d’être considérés comme écarts ou faits marginaux, les détails ont ainsi pu acquérir un rôle central pour la description, l’interprétation et l’attribution (quel que soit le domaine d’investigation privilégié). Autrefois largement sous-estimés par l’observation, dont ils constituaient en quelque sorte les rebuts devant être abandonnés au profit d’une vision d’ensemble, les détails se sont – pour les défenseurs de ce paradigme – mués en indices permettant de reconstituer et de révéler une situation absente. À suivre ces analyses, les historiens de l’art seraient nombreux à avoir inscrit leurs travaux dans la perspective de ce paradigme indiciaire – le connaisseur d’art Giovanni Morelli étant, aux yeux de Carlo Ginzburg, l’une des figures les plus emblématiques de la priorité accordée aux détails dans l’effort d’attribution d’une œuvre à un artiste. Morelli avait pour projet de défaire les assignations trop rapides et les liens interprétatifs déjà établis par le passé, pour reprendre le travail d’identification à son tout début, concentrant son effort sur des traits sous-estimés, et faisant par là apparaître des erreurs d’attribution parfois dommageables (en dépit des moqueries dont il faisait les frais à cause de sa propension à étudier les oreilles ou les ongles). Fondée sur la sémiotique médicale (Morelli, comme Freud, comme Conan Doyle, avait une formation de médecin), la capacité de diagnostic pouvait alors servir à « remonter, à partir de faits expérimentaux apparemment négligeables, à une réalité complexe qui n’est pas directement expérimentable » . Enraciné dans les moments inauguraux décrits par Ginzburg, le paradigme indiciaire est devenu le lieu de croisement « de disciplines basées sur le déchiffrement des signes en tout genre, allant des symptômes aux écritures » . Or, parmi ces disciplines, il faut compter à n’en pas douter l’iconologie, à laquelle Ginzburg fait très peu référence dans l’article de 1979, si ce n’est à travers la citation d’ouverture, qu’il attribue à Aby Warburg : Dieu est dans les détails. Car en effet, en tant que méthode d’interprétation des artefacts visuels (essentiellement concentrée sur la peinture), l’iconologie cultive un contact rapproché avec ses objets et défend une « lecture » attentive des marques matérielles renvoyant à un contexte symbolique précis, qu’il s’agit de dégager. Le travail de l’iconologue s’inscrit par définition dans le registre du déchiffrement ; les œuvres d’art étant régulièrement assimilées à des rébus dont il faut pouvoir résoudre l’énigme . Dans cette perspective, la peinture est considérée comme accumulation de signes indiquant une valeur symbolique définie. En tant qu’approche spécifique (et volontairement limitée) de l’œuvre d’art, l’iconologie pose le problème de la signification, et interroge ce qui nous met sur la piste de la signification. [less ▲]

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See detailSignes, symboles et ornementation de l’Hadrianus de Montserrat (P.Monts.Roca III, inv.162 → - 165 ↓)
Berg, Tatiana ULg

Conference (2016, June 03)

Texte latin profane, l’Hadrianus appartient au célèbre codex miscellaneus en papyrus de Montserrat, dont il représente la sixième partie, la dernière à avoir fait l’objet d’une édition. Daté ... [more ▼]

Texte latin profane, l’Hadrianus appartient au célèbre codex miscellaneus en papyrus de Montserrat, dont il représente la sixième partie, la dernière à avoir fait l’objet d’une édition. Daté paléographiquement de la seconde moitié du IVe siècle, ce dernier présente la particularité de contenir des textes à la fois grecs et latins, profanes et chrétiens, tous écrits par la même main. Après avoir décrit et analysé les signes, symboles et ornementation attestés dans l’Hadrianus, on les comparera avec ceux que l’on trouve dans le reste du codex de Montserrat, ainsi que dans d’autres papyrus datés de la même époque. [less ▲]

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See detailComparison of surface and column carbon monoxide at a high altitude, a megacity and a southern hemisphere site
Té, Yao; Jeseck, Pascal; Franco, Bruno ULg et al

Conference (2016, June 02)

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See detailParatextual signs in the medico-magical texts of the New Kingdom
Motte, Aurore ULg; Sojic, Nathalie ULg

Conference (2016, June 02)

This talk aims at describing the use of paratext in the medico-magical corpus of the New Kingdom (c. 1570-1069). The focus will be on hieratic texts written on papyri and ostraca. The first part will ... [more ▼]

This talk aims at describing the use of paratext in the medico-magical corpus of the New Kingdom (c. 1570-1069). The focus will be on hieratic texts written on papyri and ostraca. The first part will consist in typological considerations. From a formal point of view, paratextual notations will be grouped into three categories: (1) paratextual signs stricto sensu; (2) those that are not paratextual signs strictly speaking, as they are hieroglyphic signs, but that have to be understood as such; (3) the use of other visual means (red ink, size of the characters, blank spaces, …) to indicate that some elements are to be read as paratext. In the second part of the talk, we will define the functions (punctuation, emendation marks, layout marking, reading instructions, ...) and the uses of all these signs. [less ▲]

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See detailRebooting Wonder Woman and You're Not DC Comics: Gender and the History of Comics in Ron Regé, Jr.'s Diana
Crucifix, Benoît ULg

Conference (2016, June 02)

With its long serial history and in its various reboots, Wonder Woman has successively and/or simultaneously functioned as a super-heroic icon for feminism and as a sex symbol objectified by the “male ... [more ▼]

With its long serial history and in its various reboots, Wonder Woman has successively and/or simultaneously functioned as a super-heroic icon for feminism and as a sex symbol objectified by the “male gaze.” Her body has always been a site of contention for the complicated place of women within comics culture, and her story is not only that of DC to tell, but also that of her fans, readers, and cartoonists, who have been writing their own versions of the character. This paper zooms in on one particular instance that not only revisits the story of the character, but also its history as a cultural object. Ron Regé, Jr.'s self-published Diana is an adaptation of Marston and Peter's 1943-1944 newspaper strips retelling Wonder Woman's origin story in a highly respectful homage to its creators. Regé's Diana reads as an explicit attempt to reclaim attention for the original comics of Marston and Peter as well as the biographies of their creators: the inside covers sum up Marston's life as a psychiatrist, feminist and polyamorist, and further posits Wonder Woman as a feminist superhero that needs to be reinvigorated today. Redrawing the origin story of Wonder Woman both as fictional character and cultural object becomes for Regé an act of dissent from DC Comics's New 52 reboot and its ‘counter-feminist’ revision of the character's origin story. This act simultaneously tunes in with a sudden public attention in 2014 for the historical origins of Wonder Woman and its feminist genealogies, most notably through the success of Jill Lepore's The Secret History of Wonder Woman. By drawing from the serial archive of the character, Regé draws attention to the gendered dynamic of remembering and forgetting that underwrites the history of comics. [less ▲]

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See detailModélisation d'une climatisation automobile multi-évaporateurs
Gillet, Thomas ULg; Rullière, Romuald; Haberschill, Philippe et al

Poster (2016, June 02)

La modélisation d’une climatisation automobile multi-évaporateurs, composées de deux évaporateurs et d’un refroidisseur de fluide secondaire, a été réalisée à l’aide du logiciel LMS Imagine.Lab Amesim® 1D ... [more ▼]

La modélisation d’une climatisation automobile multi-évaporateurs, composées de deux évaporateurs et d’un refroidisseur de fluide secondaire, a été réalisée à l’aide du logiciel LMS Imagine.Lab Amesim® 1D. Dans le but d’étudier le comportement de la boucle, des perturbations sous la forme d’échelon ont été simulées sur un point de fonctionnement à moyenne et haute charge. L’impact de ces perturbations sur la stabilité de la température d’air soufflé est analysé pour deux types de détendeur. Les premiers résultats montrent que les détendeurs thermostatiques peuvent engendrer des instabilités. [less ▲]

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See detailLa résilience des ménages face aux changements climatiques dans la région de Maradi au Niger : le cas de la Régénération Naturelle Assistée
Andres, Ludovic ULg; Sambo, Bodé; Saidou, Laminou et al

Conference (2016, June 02)

Face à une dégradation de l’environnement et à l’accroissement des chocs conjoncturels et structurels dans la région de Maradi, la population de la zone a développé des stratégies afin de lutter contre ... [more ▼]

Face à une dégradation de l’environnement et à l’accroissement des chocs conjoncturels et structurels dans la région de Maradi, la population de la zone a développé des stratégies afin de lutter contre les risques de vulnérabilité à l’insécurité alimentaire et la pauvreté. En effet, les nombreuses crises climatiques et alimentaires ont induit le développement de stratégies extrêmes de la population telles que la coupe abusive du couvert ligneux (Andres L. et Lebailly Ph., 2013). Or, ces coupes ont fragilisé un environnement sahélien aux ressources souvent limitées. En outre, la démographie des zones du sud de Maradi, dépassant les 100 habitants au kilomètre carré (hab/km²), accroit la pression sur l’environnement, le morcellement et la saturation des parcelles agricoles familiales (Andres L. et Lebailly Ph., 2013 ; Populin M. et al, 2015). Toutefois, de nombreuses mesures ont été mises en place afin d’accroitre la résilience environnementale des populations. En effet, depuis 1980, les projets financés par le Fond International de Développement Agricole (FIDA) ont introduit la Régénération Naturelle Assistée (RNA) dans la zone de Maradi (Adam T. et al., 2006). Celle-ci est une méthode d’agroforesterie participative valorisant les rejets d’arbustes ligneux endogènes permettant une reconstitution du couvert ligneux des parcelles agricoles (Botoni E. et al., 2005). La RNA a induit depuis 30 ans un effet inverse permettant d’améliorer l’environnement, le couvert ligneux (fertilité des sols, protection contre le vent, ombrage) mais aussi les revenus et conditions de vie des ménages. Dans le cadre d’un partenariat scientifique avec le Programme Niger-FIDA, une étude des impacts socioéconomiques a été réalisée dans un village de la région de Maradi. La présente étude, réalisée entre juin et novembre 2015, repose sur des entretiens auprès de personnes ressources et des enquêtes semi-structurées. L’objectif du présent article est de dégager une analyse et synthèse des impacts socioéconomiques d’une stratégie telle que la RNA permettant d’accroitre la résilience environnementale des ménages. L’article souligne, à l’aide d’un cas concret (la RNA), l’importance de diversifier et de renforcer les stratégies des ménages afin d’accroitre la résilience et de permettre aux ménages de s’intégrer dans une logique de développement durable au sein d’une communauté. La résilience environnementale est définie comme étant les différentes capacités et stratégies des ménages à faire face aux incertitudes et risques environnementaux (Lallau B., 2011). Les résultats démontrent de nombreux impacts socioéconomiques comme l’accroissement des rendements agricoles, l’accroissement de la disponibilité en bois destiné à l’énergie, l’accroissement de la valeur foncière des parcelles pratiquant la RNA, et l’accroissement du fourrage ligneux (Bayala J et al., 2003 ; Dramé Yayé A., Berti F., 2008). D’autres impacts socioéconomiques difficilement quantifiables tels que la pharmacopée, le bois de construction et l’artisanat seront aussi décrits. Le présent article abordera les risques qu’encourent les ménages d’une zone fragile comme la région de Maradi. En outre, l’article s’attachera à décrire la population de ces zones et leurs nombreuses stratégies d’adaptation en vue d’accroitre sa résilience face aux nombreux risques de chocs conjoncturels et structurels. Ensuite, le présent article décrira la RNA dans la zone d’étude et ses impacts socio-économiques. Fort de cette analyse et des résultats démontrant le renforcement des capacités à lutter contre des chocs environnementaux, l’article soulignera l’importance de développer une méthode participative se basant sur un savoir local et permettant d’accroitre la résilience des ménages de la région de Maradi. Enfin, il tentera, à l’aide de l’exemple de la RNA, d’insister sur le développement de stratégies diversifiant les capacités des ménages et s’intégrant dans une logique de développement communautaire. [less ▲]

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See detailY-a-t-il des contre-indications à l'examen ENMG ?
WANG, François-Charles ULg

in Echaniz-Laguna, Andoni (Ed.) ENMG 2016 (2016, June 02)

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See detailModel-Based Decision Support Algorithm to Guide Fluid Resuscitation
Pironet, Antoine ULg; Dauby, Pierre ULg; MORIMONT, Philippe ULg et al

Conference (2016, June 02)

Fluid resuscitation is the first choice therapy for sepctic shock. However, fluid infusion only increases cardiac output in approximately 50 % of cases, while an excess of fluid can have harmful effects ... [more ▼]

Fluid resuscitation is the first choice therapy for sepctic shock. However, fluid infusion only increases cardiac output in approximately 50 % of cases, while an excess of fluid can have harmful effects. Therefore, clinicians are looking for indices to predict the effect of fluid infusion on cardiac output, before giving fluid. In this work, a minimal mathematical model of the cardiovascular system is used, representing the heart, an artery and a vein. The nine model parameters, including total stressed blood volume, are identified from experimental data. The experimental data was recorded during three 500 ml fluid infusions on two pigs infected with endotoxin, to simulate septic shock. The total stressed blood volume parameter is negatively associated with the change in cardiac output after fluid infusion, as observed in previous studies. Subsequently, an algorithm is proposed to guide fluid resuscitation, based on the value of this parameter. The use of the algorithm results in 60 % less fluid being given with virtually no effect on cardiac output. The decision algorithm has the potential to be used in human clinical trials since the data required for parameter identification can be obtained in an intensive care unit. [less ▲]

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See detailParatextual elements in a papyrus archive from Deir el-Medina. Exploring a marginal scribal practice across genres and time
Polis, Stéphane ULg

Conference (2016, June 02)

The aim of this paper is to describe the variety of paratextual elements encountered in the so-called ‘Chester Beatty’ papyrus archive coming from Deir el-Medina (Western Thebes; New Kingdom). Originally ... [more ▼]

The aim of this paper is to describe the variety of paratextual elements encountered in the so-called ‘Chester Beatty’ papyrus archive coming from Deir el-Medina (Western Thebes; New Kingdom). Originally, this archive consisted of over 45 different manuscripts, which passed into various hands among the Necropolis workmen of the New Kingdom during a period of more than 100 years (Černý 1945; Koenig 1981; Pestman 1982; Grandet 2002) and is now scattered among collections and museums around the world (Cairo, Dublin, Geneva, London, Oxford).After some considerations on the history of this archive — from Antiquity until its eventful discovery, both in situ within the village of Deir el-Medina and on the antiquity market between 1928 and 1935 (Posener, in Černý 1978: VI-VII) — this talk will be devoted to the formal description and functional categorization of the paratextual elements encountered in the texts of the archive. This corpus has been selected in order to limit the amount of variation possibly induced by different mediums (the texts are all written on papyrus) and by heterogeneous socio-cultural settings. On the other hand, it allows me to explore a great variety of paratextual elements used by this community across time (from the 19th dynasty until the second part of the 20th dynasty) and genres. [less ▲]

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See detailHuman Rights in National versus International Criminal Justice: the Gravity of Crimes as a Legitimate Source of Legal Pluralism?
Deprez, Christophe ULg

Conference (2016, June 01)

This presentation addressed the question whether the gravity of international crimes justifies the application of human rights standards that would be different (more flexible) than those available in ... [more ▼]

This presentation addressed the question whether the gravity of international crimes justifies the application of human rights standards that would be different (more flexible) than those available in ordinary criminal contexts. [less ▲]

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See detailMicrostructural evolution during the heat treatment of Laser Beam Melted AlSi10Mg
Mertens, Anne ULg; Dedry, Olivier ULg; Reuter, David et al

Conference (2016, June 01)

Al alloy AlSi10Mg processed by Laser Beam Melting (LBM) exhibits a much finer microstructure than its cast counterpart due to the ultra-fast cooling rates imposed in the LBM process. One important ... [more ▼]

Al alloy AlSi10Mg processed by Laser Beam Melting (LBM) exhibits a much finer microstructure than its cast counterpart due to the ultra-fast cooling rates imposed in the LBM process. One important consequence of this microstructural refinement is that a classical T6 age hardening heat treatment will not have the same effect on LBM AlSi10Mg when compared with cast AlSi10Mg. Indeed, a previous study by the present authors has shown that heat treating LBM AlSi10Mg at 510°C for 6 hours followed by a second isothermal hold at 170°C for 6 hours brought a marked improvement of the yield stress by 30% and of the elongation at break by 220%. However, this was achieved at the expense of a decrease in both hardness and ultimate tensile strength. A better understanding of the underlying phenomena is needed in order to optimize the heat treatment of LBM AlSi10Mg. The present work hence aims at investigating in more depth the microstructural evolution induced upon heat treating LBM AlSi10Mg. Changes in texture as well as in the distribution of Si-rich precipitates (size, morphology...) have been studied, with a particular attention to those changes taking place during the first step of the heat treatment at the higher temperature of 510°C. [less ▲]

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See detailENMG du pied
WANG, François-Charles ULg; LOZZA, Alessandro

Conference (2016, June 01)

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See detailScreening of mahoran plants for cosmetic applications.
Saive, Matthew ULg; Frederich, Michel ULg; Fauconnier, Marie-Laure ULg

Poster (2016, June 01)

This study’s main aim is to identify plant species showing anti-oxidant, anti-inflammatory and skin whitening properties. A selection of 89 samples from previous infield studies on the traditional uses of ... [more ▼]

This study’s main aim is to identify plant species showing anti-oxidant, anti-inflammatory and skin whitening properties. A selection of 89 samples from previous infield studies on the traditional uses of plants in Mayotte were analyzed. The anti-oxidant activity was assessed using the α, α-diphenyl-β-picrylhydrazyl (DPPH) method developed by Blois [1]. The anti-inflammatory activity and the skin whitening activity were both assessed through the study of inhibition kinetics from specific enzymes: respectively, lipoxygenase (EC 1.13.11.12) due to its important role in the leukotriene pathway and tyrosinase (EC. 1.14.18.1) as it takes part in the melanogenesis pathway. The IC 50 value for each sample and for each activity was obtained using UV/Vis spectrophotometric technics. These IC 50 were then compared with the ones obtained from known molecules found in the literature: namely, (±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (IC50 = 4,388 µM) for the anti-oxidant activity, nordihydroguaiaretic acid (IC50 = 3,5µM) for the anti-inflammatory activity and kojic acid (IC50 = 722 µM) for the anti-tyrosinase activity. The most effective anti-oxidant activity was observed in fresh leaves from Acalypha wilkesiana Müll.Arg. (IC50 = 0,381 g/L) and Leea guineensis G. Don. (IC50 = 0,225 g/L) as well as in dried roots from Litchi chinensis Sonn. (IC50 = 0,346 g/L). All results are expressed in grams of fresh matter. According to the preliminary tests for the-anti-inflammatory and skin whitening activities, the crude extracts from Kalanchoe pinnata Lam. Pers., Litchi chinensis Sonn., Zingiber zerumbet (L.) Sm., Leea guineensis G. Don. and Paullinia pinnata L. are likely to show promising activities. [less ▲]

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See detailLe gisement paléolithique multistratifié d'Ormesson (Seine-et-Marne) : Palethnologie ou pâle ethnologie ?
Bodu, Pierre; Ballinger, Michèle; Dumarçay, Gaëlle et al

Conference (2016, June 01)

Il est exceptionnel de pouvoir appliquer la démarche palethnologique, si fréquemment développée pour le Magdalénien, aux gisement du Paléolithique supérieur ancien dans le Bassin parisien, dans la mesure ... [more ▼]

Il est exceptionnel de pouvoir appliquer la démarche palethnologique, si fréquemment développée pour le Magdalénien, aux gisement du Paléolithique supérieur ancien dans le Bassin parisien, dans la mesure où ils sont rares, c'est indéniable, mais aussi en raison d'un état de conservation généralement médiocre de la plupart d'entre eux. Le site d'Ormesson, situé en Seine-et-Marne, à proximité de la vallée du Loing et de la ville de Nemours, constitue depuis 2009, année de la première fouille, un gisement-laboratoire pour l'approche palethnographique de différentes populations de la fin du Paléolithique moyen au Badegoulien. A travers cet exemple devenu désormais une référence pour le Paléolithique supérieur ancien, nous nous poserons la question suivante : Palethnologie ou pâle ethnologie ? [less ▲]

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See detailVUV Optical Ground System Equipment and its application to the ICON FUV flight grating characterization and selection
Blain, Pascal ULg; Desselle, Richard ULg; Domken, Isabelle ULg et al

in Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation (2016, June)

ICON FUV is a two channel spectrographic imager that measures intensity and spatial distribution of oxygen (135.6 nm) and molecular nitrogen (157 nm) of the ionosphere. As those wavelengths are strongly ... [more ▼]

ICON FUV is a two channel spectrographic imager that measures intensity and spatial distribution of oxygen (135.6 nm) and molecular nitrogen (157 nm) of the ionosphere. As those wavelengths are strongly absorbed by the atmosphere, the optical elements of the system have to be tested inside vacuum chambers. Prior to the instrument alignment and calibration, two 3600 gr/mm gratings were characterized. The primary focus is the measurement of the diffraction efficiencies; while the second objective is to select the best grating and to define which is the flight and the spare. A dedicated setup has been developed to assess the grating optical performances under vacuum. A 1 cm diameter collimated beam is generated using an off-axis parabola and a UV source at its focal point. The grating is placed at the center of two rotation stages collinearly aligned. One detector is placed on a rotating arm, deported from its rotation center. A PMT detector records diffracted light intensity with respect to its angular position and its wavelength. Angular incidence on the grating is tuned with the help of the second rotation stage. The grating efficiency homogeneity and scattering properties are measured through a Y-X scan. [less ▲]

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See detailEfficient Computation of the Extrema of Algebraic Quality Measures for Curvilinear Finite Elements
Johnen, Amaury ULg; Geuzaine, Christophe ULg; remacle, Jean-François

Conference (2016, June)

The development of high-order computational methods for solving partial differential equations on unstructured grids has been underway for many years. Such methods critically depend on the availability of ... [more ▼]

The development of high-order computational methods for solving partial differential equations on unstructured grids has been underway for many years. Such methods critically depend on the availability of high-quality curvilinear meshes, as one bad element can degrade the solution in the whole domain. The usual way of generating curved meshes is to first generate a (high-quality) straight-sided mesh. Then, mesh entities that are classified on the boundaries of the domain are curved. This operation introduces a "shape-distortion" that should be controlled. Quality measures allow to quantify to which point an element is well-shaped. They also provide tools to improve the quality of meshes through optimization. In this work we propose an efficient method to compute several quality measures for curved elements, based on the Jacobian of the mapping between the straight-sided elements and the curved ones. Contrary to the approach presented in "A. Gargallo-Peiró, X. Roca, J. Peraire, and J. Sarrate. Distortion and quality measures for validating and generating high-order tetrahedral meshes. Engineering with Computers, pages 1–15, 2014.", which relies on an L2-norm over the elements, we compute the actual minimum and maximum of the local quality measure for each element. The method is an extension of previous works on the validity of those elements (A. Johnen et al., 2013). The key feature is that we can adaptively expand functions based on the Jacobian matrix and its determinant in terms of Bézier functions. Bézier functions have both properties of boundedness and positivity, which allow sharp computation of minimum or maximum of the interpolated functions. [less ▲]

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See detailPolyphosphoesters as a new platform for the design of particulate drug delivery systems
Vanslambrouck, Stéphanie; Ergul Yilmaz, Zeynep; Debuigne, Antoine ULg et al

Conference (2016, June)

Thanks to their biocompatibility and degradability properties, polyphosphates are appealing polymers for biomedical applications. In contrast to aliphatic polyesters, such as poly(ε-caprolactone) and poly ... [more ▼]

Thanks to their biocompatibility and degradability properties, polyphosphates are appealing polymers for biomedical applications. In contrast to aliphatic polyesters, such as poly(ε-caprolactone) and poly(lactide), the pentavalency of the phosphorus atom allows the easy modification of the polyphosphate properties by simply adjusting the nature, the length and the functionality of the polyphosphate pendant groups. Therefore, macromolecular engineering of polyphosphoesters was applied to design well-defined architectures and functionalities adapted to drug nanocarriers. In a first approach, amphiphilic block copolymers are synthesized by organo-catalyzed ring-opening polymerization process for the synthesis of a range of PEO-b-polyphosphate bearing various pendant groups. Post-polymerization thiol-ene click reactions preformed on PEO-b-polyphosphate copolymers was also investigated to improve the hydrophobicity of the polyphosphate. The self-assembly of these PEO-b-polyphosphate copolymers into micelles was investigated, particularly, the effect of the nature of the polyphosphate pendant groups (i) on the micelles characteristics, (ii) on the encapsulation of a poorly soluble drug and (iii) on the drug release profile. The toxicity of the different amphiphilic block copolymers was also evaluated by live/dead cell viability assays. In a second approach, double hydrophilic copolymers based on polyphosphoesters have been used as templating agent for the synthesis of calcium carbonate particles. Indeed, the use of such microparticles is becoming more and more attractive in many fields especially for biomedical applications for which fine tuning of size, morphology and crystalline form of CaCO3 particles is crucial. Although some structuring compounds, like hyaluronic acid, give satisfying results, the control of the particle structure still has to be improved. To this end, we evaluated the CaCO3 structuring capacity of the well-defined double hydrophilic block copolymers composed of poly(ethylene oxide) and of a polyphosphoester segment with affinity for calcium like poly(phosphotriester)s bearing pendant carboxylic acids or poly(phosphodiester)s with a negatively charged oxygen atom on each repeating monomer unit. [less ▲]

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See detailSeasonal variation in human COGNITIVE brain responses
Meyer, Christelle; Muto, Vincenzo ULg; Jaspar, Mathieu ULg et al

Poster (2016, June)

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See detailA Gaussian mixture approach to model stochastic processes in power systems
Gemine, Quentin ULg; Cornélusse, Bertrand ULg; Glavic, Mevludin ULg et al

in Proceedings of the 19th Power Systems Computation Conference (PSCC'16) (2016, June)

Probabilistic methods are emerging for operating electrical networks, driven by the integration of renewable generation. We present an algorithm that models a stochastic process as a Markov process using ... [more ▼]

Probabilistic methods are emerging for operating electrical networks, driven by the integration of renewable generation. We present an algorithm that models a stochastic process as a Markov process using a multivariate Gaussian Mixture Model, as well as a model selection technique to search for the adequate Markov order and number of components. The main motivation is to sample future trajectories of these processes from their last available observations (i.e. measurements). An accurate model that can generate these synthetic trajectories is critical for applications such as security analysis or decision making based on lookahead models. The proposed approach is evaluated in a lookahead security analysis framework, i.e. by estimating the probability of future system states to respect operational constraints. The evaluation is performed using a 33-bus distribution test system, for power consumption and wind speed processes. Empirical results show that the GMM approach slightly outperforms an ARMA approach. [less ▲]

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See detailInfluence of propeller configuration on propulsion system efficiency of multi-rotor Unmanned Aerial Vehicles
Theys, Bart; Dimitriadis, Grigorios ULg; Hendrick, Patrick et al

in Proceedings of the International Conference on Unmanned Aircraft Systems, ICUAS 2016 (2016, June)

Multi-rotor Unmanned Aerial Vehicles make use of multiple propellers, mounted on arms, to produce the required lift. This article investigates the influence on propulsion system efficiency in hover due to ... [more ▼]

Multi-rotor Unmanned Aerial Vehicles make use of multiple propellers, mounted on arms, to produce the required lift. This article investigates the influence on propulsion system efficiency in hover due to the configuration of these propellers. Influence of pusher or puller configuration of the propeller, number of blades, shape and dimensions of the arm, coaxial and overlapping propellers, is presented. A dedicated test bench that allows testing of various experimental setups is designed and built in order to realistically represent multi-rotor arms. Test results show that a two-bladed pusher configuration is most efficient and slenderness of the arm has more influence on efficiency than shape. A coaxial propulsion system approaches the efficiency of a single-prop system at high disk loadings. Finally, interference effects due to overlapping propellers are discussed. [less ▲]

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See detailSharing a Car? Yuck, No! An Investigation of Consumer Contamination in Access-Based Services
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

Conference (2016, June)

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See detailAnalyse de la main d’œuvre dans la riziculture de la plaine de la Ruzizi des pays de la CEPGL
Furaha Mirindi, Germaine ULg; Lebailly, Philippe ULg

Conference (2016, June)

Le salariat agricole se développe et les exploitations agricoles y ont de plus en plus recours, notamment dans la riziculture traditionnellement familiale. Jusque-là peu de travaux s’y sont intéressés ... [more ▼]

Le salariat agricole se développe et les exploitations agricoles y ont de plus en plus recours, notamment dans la riziculture traditionnellement familiale. Jusque-là peu de travaux s’y sont intéressés alors qu’il permet de repenser le fonctionnement des exploitations et d’assurer dans certains cas leur reproduction. Nous proposons ici de nous intéresser au salariat, du point de vu des exploitants rizicoles et d’identifier les facteurs qui influencent le recours à la main d’œuvre salariale locale et étrangère selon le cas. L’étude se base sur les données des enquêtes menées auprès de 240 exploitants rizicoles choisis à partir de la méthode des quotas sur la base d'une stratification des exploitations rizicoles et 60 salariés agricoles choisis de manière aléatoire et répartis de manière équitable entre les trois pays. La main d’œuvre agricole est relativement jeune à prédominance masculine. Alors que dans les sites rwandais et burundais, la main d’œuvre locative est locale, dans le site congolais, on y observe un certain flux de la main d’œuvre car 72% de la main d’œuvre travaillant dans les exploitations rizicoles est étrangère dont 47% en provenance du Burundi et 25% en provenance du Rwanda. A partir du test de Levene et celui de Brown et Forsythe, pour les riziculteurs congolais, les facteurs qui influence le recours à la main d’œuvre étrangère sont notamment la superficie rizicole exploitée, une main d’œuvre étrangère bon marché, la facilité d’accès aux intrants bon marché, l’insuffisance de la main d’œuvre locale. En plus, cette main d’œuvre joue un rôle crucial dans la cohésion des peuples dans un contexte post -conflits. [less ▲]

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See detailAlignment and calibration of the ICON-FUV instrument: Development of a vacuum UV facility
Loicq, Jerôme ULg; Blain, Pascal ULg; Kintziger, Christian ULg et al

in Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (2016, June)

The optical calibration of the ICON-FUV instrument requires designing specific ground support equipment (GSE). The ICON-FUV instrument is a spectrographic imager that operates on two specific wavelengths ... [more ▼]

The optical calibration of the ICON-FUV instrument requires designing specific ground support equipment (GSE). The ICON-FUV instrument is a spectrographic imager that operates on two specific wavelengths in the UV (135.6 nm and 157 nm). All the operations have to be performed under vacuum UV light. The optical setup is based on a VUV monochromator coupled with a collimator that illuminates the FUV entrance slit. The instrument is placed on a manipulator providing fields pointing. Image quality and spectral properties can be then characterized for each field. OGSE, MGSE, optical calibration plan and vacuum alignment of the instrument are described. [less ▲]

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See detailHow to enhance citizenship and reduce dysfunctional patient behavior during service interactions: An empirical study in the nursing context
Lerch, Jennifer; Schmitz, Gertrud; Büttgen, Marion et al

Conference (2016, June)

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See detailInfluence of the inter‐stage coupling flexibility on the dynamics of multi‐stage rotors
Nyssen, Florence ULg; Golinval, Jean-Claude ULg

in Proceedings of the ASME Turbo Expo 2016 (2016, June)

In this work, a characterization of the inter-stage coupling in a one-piece multi-stage bladed structure is performed. More particularly, the effect of the inter-stage coupling flexibility on the mode ... [more ▼]

In this work, a characterization of the inter-stage coupling in a one-piece multi-stage bladed structure is performed. More particularly, the effect of the inter-stage coupling flexibility on the mode-shapes is evaluated. To this purpose, the MAC matrix between the mono-stage and multi-stage modes is computed for different drum Young’s modulus of the inter-stage coupling. In parallel, the strain energy located in the blades and in the connecting structure is computed for different levels of inter-stage coupling. This enables to establish a criterion to determine when a multi-stage finite element analysis is necessary instead of only computing the different mono-stage models separately. This criterion is based on the localization of the energy in the structure. Numerical analyses are performed on a two-stages academic bladed structure. [less ▲]

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See detailUnderstanding Usage Behaviour in a Peer-to-Peer Task Community
Deliège, Fanny ULg; Ates, Zelal ULg; Benoit, Sabine et al

Conference (2016, June)

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See detailMitigation of the torsional flutter phenomenon of bridge deck section during a lifting phase
Andrianne, Thomas ULg; De Ville De Goyet, Vincent ULg

in Mitigation of the torsional flutter phenomenon of bridge deck section during a lifting phase (2016, June)

This paper presents a complete analysis of the aeroelastic behaviour of a deck section during the construction stage of the Third Bosphorus Bridge in Istanbul, Turkey. The combination of the low torsional ... [more ▼]

This paper presents a complete analysis of the aeroelastic behaviour of a deck section during the construction stage of the Third Bosphorus Bridge in Istanbul, Turkey. The combination of the low torsional stiffness along the vertical axis and the unstable aerodynamic shape of the suspended deck section led to a torsional flutter instability for a low wind speed (9.6 m/s). This low critical wind speed was obviously very likely to occur on the site of construction, so that mitigation actions were be implemented. It was decided to cover partially the sides of the deck section in order to modify adequately its aerodynamic shape. It is demonstrated that the proposed aerodynamic counter-measures increase the critical torsional flutter wind speed up to 39.5 m/s (worst configuration), which is acceptable for the construction phase of the bridge. The proposed mitigation solution was implemented and no torsional oscillations were observed. [less ▲]

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See detailDevelopment of improved preservation techniques for cyanobacterial and diatom strains in the BCCM collections
Crahay, Charlotte ULg; Chepurnova, Olga; Day, John G et al

Poster (2016, June)

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See detailMethodology to fish peptide ligands of nAChRs from Cone snail venoms by MALDI-TOF mass spectrometry
Echterbille, Julien ULg; Gilles, Nicolas; Araoz, Romulo et al

Poster (2016, June)

More than 50,000 of venomous species are currently indexed in the world. Each of their venom is composed of hundreds of toxins which potentially exhibit a high selectivity for membrane receptors such as ... [more ▼]

More than 50,000 of venomous species are currently indexed in the world. Each of their venom is composed of hundreds of toxins which potentially exhibit a high selectivity for membrane receptors such as GPCRs or ion channels. Among them, nAChRs are a target for drug discovery, primarily for treating central nervous system troubles. Therefore, the discovery of pharmacological tools and innovative drugs targeting nAChRs from animal venoms appears as an evidence. This study proposes the use a mass-spectrometry based methodology1 to discover new nAChRs ligands from cone snails venoms, and particularly -conotoxins (a-CTXs), known as potential antagonists of nAChRs2. in few words, Torpedo membranes, containing a high concentration of nAChRs, are incubated with BSA tryptic digests (>100 peptides) doped by small amounts of known a-CTXs. After two hours incubation, free (i.e. containing molecules remaining in solution) and bound (i.e. peptides bound to the membranes) fractions were analyzed with a MALDI-TOF/TOF mass spectrometer. The POC (positive and negative controls) as well as a real screening of Conus ermineus venom are presented. [less ▲]

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See detailThe antioxidant responses differ between Symbiodinium strains from different geographic origins
Roberty, Stéphane ULg; Furla, Paola; Plumier, Jean-Christophe ULg

Conference (2016, June)

Studies conducted these last two decades have revealed that high sea surface temperatures accompanied by high levels of solar irradiance are responsible for an over production of reactive oxygen species ... [more ▼]

Studies conducted these last two decades have revealed that high sea surface temperatures accompanied by high levels of solar irradiance are responsible for an over production of reactive oxygen species (ROS) leading to the disruption of the symbiosis between cnidarians and their symbiotic Symbiodinium. But, all coral species do not show the same sensitivity to stress. In this context we examined how the antioxidant network of different Symbiodinium species responds to oxidative stress. We bypassed the various thermal and light tolerances existing among the genus Symbiodinium by using a chemical approach, i.e., a treatment with menadione. ROS produced during this oxidative burst reduced photosynthesis by 30 to 50% and significantly decreased the activity of superoxide dismutase. In addition, the low level of lipid peroxidation concomitantly with the decrease in the concentration of diatoxanthin and other carotenoids during the oxidative stress confirms their function of antioxidants and their role in the stabilization of membrane lipids. The analysis of the cellular damages also indicates that proteins were damaged and most likely eliminated by the ubiquitin-proteasome pathway. Finally, caspase-like activity decreased suggesting that cell death mechanisms are not initiated at the early stage of the stress. Although, the mechanisms at play seem to be the same, we found that the temperate Symbiodinium strain (A1) was less impacted by the treatment with menadione than the tropical strain (F1) suggesting that the variations observed are related to their geographic origin. [less ▲]

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See detailTranscranial magnetic stimulation in sleep consciousness
Gosseries, Olivia ULg; Niemienen, Jaakko; Jason, Samaha et al

Poster (2016, June)

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See detailDisentangling soil from plant methanol exchanges in a maize field: a first step
Bachy, Aurélie ULg; Mozaffar, Ahsan ULg; Aubinet, Marc ULg et al

Poster (2016, June)

This poster presents the current research done in order to disentangle soil from plant methanol exchanges in a maize field. Methanol exchanges were calculated at ecosystem-scale (therefore including both ... [more ▼]

This poster presents the current research done in order to disentangle soil from plant methanol exchanges in a maize field. Methanol exchanges were calculated at ecosystem-scale (therefore including both components). It bases on the following observation: methanol exchanges on bare soil (measured when maize was at germination stage) were as important as when plants were fast growing (and thereby, when the highest methanol plant methanol emissions were expected), and this under similar weather conditions. The goal of this poster is thus to understand why emissions were similar at these two periods. First, it addresses the question of the actual contribution of maize plants in methanol exchanges, by comparing up-scaled methanol exchanges measured on maize at leaf-scale (Mozaffar A.) to those measured at ecosystem-scale. Then, it investigates methanol exchanges mechanisms in order to evaluate how did soil methanol emissions evolve along the maize growing season. At the end of this poster, the hypothesis of decreasing soil methanol emissions along the maize growing season is proposed. [less ▲]

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See detailSharing a Car? Yuck, No! An Investigation of Consumer Contamination in Access-Based Services
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

Conference (2016, June)

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See detailECCO2 Removal The Perfusionists’ Perspective
HELLA, Dominique ULg

Conference (2016, June)

ECCO2 Removal, new technique, study to approve the methodology

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See detailEducation of instructors of a physical activity program for cancer patients and survivors: planning and evaluation of a poster presentation session
Rompen, Jérôme ULg; Korycki, Marta ULg; Ortmans, Sabine et al

Poster (2016, June)

Introduction The Belgian Foundation against Cancer proposes an adapted physical activity (APA) program for cancer patients and survivors, called Raviva (http://www.cancer.be/raviva-bouger-pour-se-sentir ... [more ▼]

Introduction The Belgian Foundation against Cancer proposes an adapted physical activity (APA) program for cancer patients and survivors, called Raviva (http://www.cancer.be/raviva-bouger-pour-se-sentir-mieux).The activities are supervised by instructors with inconstant trainings and experiences. Contrary to other countries, Belgian APA instructors do not necessarily need to follow specific education programs such those proposed by the ACSM (Schmitz et al., 2010).We were involved in the implementation of a specific training day for in-service Raviva instructors. As it is the case in sport coaches’ education (Erickson et al., 2008), interacting with colleagues seemed to be an appropriate method to improve APA instructors’ skills. Therefore, interactive methods were proposed to be used in order to increase the participants’ interest. The aim of this paper was to describe and analyse a poster presentation session as well as to identify good practices. Methods As part of the training day, the poster presentation session consisted to create groups of 4 to 5 persons and to ask them to imagine and share solutions to specific problems linked with psycho-emotional aspects of the instruction process with Raviva groups. Three methods were used to collect the data: interviews of the organizers (n=4), a questionnaire for all trainees (n=35) and participant observation. Results Examples of good practices were listed and exchanged between the participants. All trainees considered that the poster presentation session was interesting and most of them (94%) reported that appropriate themes were discussed. Moreover, 88.2% of the participants mentioned that they were able to share their experiences. Three expressed negative opinions about the organization. These opinions were supported by all organizers as well as by the observation. Conclusions This educational tool seems to be interesting. However, organizers should plan enough time for such activity. Moreover, the time allocation between each part of the session should be better prepared and controlled. [less ▲]

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See detailImportance de l’utilisation du Système d’Information Géographique pour les vastes sites de plein air du Paléolithique moyen en France septentrionale. L’Exemple de Caours (Somme, France) et Beauvais (Oise, France).
Moreau, Gwénaëlle ULg; Locht, Jean-Luc

Poster (2016, June)

During the middle Palaeolithic, the northern France was only occupied by Neanderthals groups. However, successions of glacial and interglacial cycles explain a complex and discontinuous settlement ... [more ▼]

During the middle Palaeolithic, the northern France was only occupied by Neanderthals groups. However, successions of glacial and interglacial cycles explain a complex and discontinuous settlement, raising complication in the study of its dynamics at a regional scale. Therefore, some aspects of Neanderthals behaviour are still mischaracterize: in most cases, the function of the site and its territorial management over the northern France have to be specified. The spatial analysis of open air sites from northern France will help us to answer those questions. However, for Middle Palaeolithic sites, we can’t see systematically on the field the spatial organisation directly, we sometimes need modelization. Therefore, we started to build a spatial analysis protocol adapted to this site and applied to such sites. The sites of Caours (Somme, France) and Beauvais (Oise, France) are two open air sites that are exceptionally well preserved and displaying a large amount of faunal and lithic rests. Both are perfect candidate to apply and test the new protocol. First results proved that for each site the existence of a spatial organisation as remains concentration zones. Then, we characterize this areas – number, distribution. Finally, we were able to associate them to human activity areas like hearths, butchery or knapping areas. [less ▲]

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See detailDevelopment of a semi-analytical model of volumetric expander for system-level simulation.
Oudkerk, Jean-François ULg

in Proceedings of ECOS 2016 (2016, June)

Organic Rankine cycles are particularly well suited for recovering energy from low-grade heat sources, such as industrial waste, engine exhaust gas or solar concentrated power. In ow-capacity systems ... [more ▼]

Organic Rankine cycles are particularly well suited for recovering energy from low-grade heat sources, such as industrial waste, engine exhaust gas or solar concentrated power. In ow-capacity systems, volumetric expanders are often preferred to turbomachines because of their reliability, robustness, low rotational speed and their ability to handle high pressure ratios… Different types of machines have been investigated and successfully tested by the uthors and tools have been developed in order to analyse experimental data. Semi-empirical odel was built to analyse losses, detect potential improvement and simulate performances. This paper present a simple and fastcomputing semi-analytical model useful for simulate dynamic system integrating volumetric expander. This model is validated on experimental data and compare to black-box model. [less ▲]

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See detailDelivering Bad News to Customers: An Employee Perspective
Delcourt, Cécile ULg; Gremler, Dwayne; Greer, Dominique

Conference (2016, June)

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See detailUn outil e-Health pour tous ? Le cas de l'informatisation du dossier infirmier au sein d'un hôpital belge
Slomian, Cynthia ULg; Schoenaers, Frédéric ULg

in Lovis, Christian; Séroussi, Brigitte; Ugon, Adrien (Eds.) et al eSanté pour tous (2016, June)

Contexte. Les soins de santé en Belgique et ailleurs sont confrontés à deux réalités : l’augmentation de la demande de soins, d’une part, et la volonté de l’Etat de diminuer les dépenses de santé, d’autre ... [more ▼]

Contexte. Les soins de santé en Belgique et ailleurs sont confrontés à deux réalités : l’augmentation de la demande de soins, d’une part, et la volonté de l’Etat de diminuer les dépenses de santé, d’autre part. Dans ce contexte, l’e-Health est souvent présentée comme la solution qui permettra de rationaliser les moyens, mais également d’augmenter l’efficience du système. Cet article se propose d’étudier une facette de l’e-Health : l’informatisation du dossier infirmier au sein d’un hôpital belge. Méthodes. Le matériau empirique rassemble des entretiens semi-directifs (n=30), des heures d’observation du travail infirmier (n=25) ainsi que l’étude de documents organisationnels. L’analyse du matériau repose sur la sociologie de l’action organisée. Résultats. L’introduction de l’ordinateur provoque des changements, mais également la persistance de routines organisationnelles. Discussion. Les infirmières s’approprient le dossier infirmier informatisé et tentent de maximiser leur pouvoir au sein de l’organisation. Conclusion. Un outil informatique n’est jamais totalement contraignant. Les acteurs se saisissent des marges de manœuvre laissée par celui-ci pour maximiser leur pouvoir. L’appropriation contingente du dispositif est au cœur de cette démarche de changement. [less ▲]

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See detailOptical design and optical properties of a VUV spectrographic imager for ICON mission
Loicq, Jerôme ULg; Kintziger, Christian ULg; Mazzoli, Alexandra ULg et al

in Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (2016, June)

In the frame of the ICON (Ionospheric Connection Explorer) mission of NASA led by UC Berkeley, CSL and SSL Berkeley have designed in cooperation a new Far UV spectro-imager. The instrument is based on a ... [more ▼]

In the frame of the ICON (Ionospheric Connection Explorer) mission of NASA led by UC Berkeley, CSL and SSL Berkeley have designed in cooperation a new Far UV spectro-imager. The instrument is based on a Czerny-Turner spectrograph coupled with two back imagers. The whole field of view covers [± 12° vertical, ± 9° horizontal]. The instrument is surmounted by a rotating mirror to adjust the horizontal field of view pointing by ± 30°. To meet the scientific imaging and spectral requirements the instrument has been optimized. The optimization philosophy and related analysis are presented in the present paper. PSF, distortion map and spectral properties are described. A tolerance study and alignment cases were performed to prove the instrument can be built and aligned. Finally straylight and out of band properties are discussed. [less ▲]

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See detailModifying Indoor Facilities Appropriate to Children
Jidovtseff, Boris ULg; Delvaux, Anne ULg; Mornard, Manhattan ULg et al

in Book of abstracts AISEP 2016 (2016, June)

Introduction Physical literacy development during childhood is critical not only to favor sport performance outcomes but also to develop long term physical activity. It’s very important for children to ... [more ▼]

Introduction Physical literacy development during childhood is critical not only to favor sport performance outcomes but also to develop long term physical activity. It’s very important for children to move in a thinking way. Diversified activities are important to develop a large panel of fundamental motor skills and to stimulate perception. It is important for children to move, but it has to be done in a thinking way. Focus on inquiry With young children it is important to maximize active time, to develop fundamental motor skills and perception, to take into account inter-individual differences, to favor enjoyment, self-confidence and to guarantee optimal security. Most of these pedagogical challenges can be reached by appropriate instruction and by an adapted environment. Contribution There is clear evidence that modifying exercise facilities influence children’s behaviour with consequences for motivation, activity level and motor development. For 25 years a reflexive approach has been used at CEReKi (Liège, Belgium) in order to determine how indoor facilities can be modified with the aim to meet children needs and to favor motor development. Attractive circuits have been developed to stimulate specific motor skills (gymnastic, athletic or ball circuits). They were created to afford action possibilities and challenges for children to explore their own abilities for exercise. According to the children’s age and level of ability different pedagogical conditions can be provided: spontaneous play, guided discovery or structured games. Circuits have to be organised in such a way that children can do most exercises on their own. The arrangement of equipment offers multiple possibilities for movement, favouring active discovery for all children. The autonomy of children allows the teacher to move throughout the circuit and assist children by scaffolding their learning. Conclusion Our experience confirms that modifying indoor facilities is relevant for 3 to 8 years old children activities. [less ▲]

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See detailECCO2 Removal; The Perfusionists’ Perspective
AMAND, Théophile ULg; KOCH, Jean-Noël ULg; HELLA, Dominique ULg

Conference (2016, June)

ECCO2 Removal is a new technique. Lab approach.New study to validate the technique.

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See detailSome results about diametral dimensions
Demeulenaere, Loïc ULg

Poster (2016, June)

The diametral dimension is an important topological invariant, especially in the context of Köthe sequence spaces. This poster presents some results concerning the equality of the diametral dimension with ... [more ▼]

The diametral dimension is an important topological invariant, especially in the context of Köthe sequence spaces. This poster presents some results concerning the equality of the diametral dimension with one of its variants. It is based on a joint work with Françoise Bastin, Leonhard Frerick, and Jochen Wengenroth. Firstly, it gives sufficient conditions to have the equality between the two diametral dimensions for a Fréchet space. Secondly, it provides some examples of spaces verifying these conditions. Finally, it gives a family of Schwartz - or even nuclear - (non metrizable) locally convex spaces for which the two diametral dimensions are different. [less ▲]

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See detailAccounting for the legacy of soil and crop management when assessing climate change impact on crop production"
Basso, Bruno; Dumont, Benjamin ULg; Shcherbak, Iurii et al

Conference (2016, June)

Detailed reference viewed: 34 (2 ULg)
See detailFactorization of minimal substitutive subshifts
Leroy, Julien ULg

Conference (2016, June)

Detailed reference viewed: 10 (3 ULg)
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See detailCustomer Coping With Service Failures Across Cultures: A Multilevel Investigation
Van Vaerenbergh, Yves; De Keyser, Arne; Hazee, Simon ULg et al

Conference (2016, June)

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See detailDes mini-jeux pour apprendre - Retour d'expérience dans un cours de chimie à l'université
le Maire, Nathalie ULg; Colaux, Catherine ULg; Fauconnier, Marie-Laure ULg et al

Conference (2016, June)

Dans le champ éducatif, les jeux ont régulièrement fait l’objet de réflexions et d’expérimentations visant à en exploiter leur potentiel au service de la compréhension, la motivation, la créativité ... [more ▼]

Dans le champ éducatif, les jeux ont régulièrement fait l’objet de réflexions et d’expérimentations visant à en exploiter leur potentiel au service de la compréhension, la motivation, la créativité, l’esprit critique etc. des étudiants. De la tortue LOGO aux jeux de simulation, l’exploitation du jeu dans l’enseignement a revêtu de multiples formes. Récemment la notion de gamification a enrichi cette ligne de recherche sur le jeu. Le concept de « gamification » désigne l’application d’éléments, de mécanismes, de processus ludiques à des situations, des contextes, des visées non ludiques. En la matière, Candy Crush, Farm Ville, Clash of Clans, etc. sont autant de jeux commerciaux qui remportent un grand succès aujourd’hui et peuvent fournir une source d’inspiration pour la création de mini-jeux pédagogiques. La présente communication relate la mise en place de « World of Chemistry », un parcours ludique mis en place de septembre à décembre 2015 en complément des supports de cours traditionnels. Ce parcours était composé de quatre mini-jeux portant sur des savoirs et des compétences identifiés comme difficiles en chimie et conçus explicitement pour incorporer des éléments de gamification issus de mini-jeux commerciaux variés. Cette expérimentation avait pour objectif d’étudier dans quelle mesure et à quelles conditions ces mini-jeux étaient susceptibles d’augmenter la fréquentation de la matière de chimie par les étudiants. A la lumière de l’usage fait des mini-jeux par 159 étudiants de première année d’université et de questionnaires de feedback qui leur ont été adressés, la communication évaluera la valeur de cette initiative pédagogique. [less ▲]

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See detailEffect of chondroitin sulfate on soluble biomarkers of osteoarthritis: how to analyze and interpret the results from an open-label trial in unilateral knee osteoarthritis patients
Möller, I; Gharbi, Myriam; Martinez, H et al

in Annals of the Rheumatic Diseases (2016, June), 75(Suppl 2), 1167

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See detailALERBLOT: Interest of 2D Immunoblot for the diagnosis of allergy to wheat
BERTHOLET, Catherine ULg; GADISSEUR, Romy ULg; quinting, birgit et al

in Allergy (2016, June), 71

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See detailImpact d'un programme d'activation comportementale sur l'humeur, le niveau d'engagement dans des activités, les ruminations et les biais attentionnels chez des étudiantes universitaires
Krings, Audrey ULg; Wagener, Aurélie ULg; Blairy, Sylvie ULg

Poster (2016, June)

A Behavioral activation program was proposed to undergraduated students with difficulties to deal with their mood. Six sessions of a Martell's program was proposed with two evaluations, before (T0) and ... [more ▼]

A Behavioral activation program was proposed to undergraduated students with difficulties to deal with their mood. Six sessions of a Martell's program was proposed with two evaluations, before (T0) and after (T1) the sessions. Different psychological processes were evaluated (behavioral activation, avoidance, rumination and attentional biases). Compared to the control group, a significal reduction was observed for abstract rumination, avoidance and a significant enhancement of selective attention to positive faces in the dot probe task was also observed. [less ▲]

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See detailSpeech characteristic of French-speaking children with Dysarthria: Pilot study
MacLeod, andrea; Maillart, Christelle ULg; Ancelle, J. et al

Poster (2016, June)

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See detailOn the modeling of MMC for use in large scale dynamic simulations
Freytes, Julian; Papangelis, Lampros ULg; Saad, Hani et al

in Proceedings of the 19th PSCC (2016, June)

This paper focuses on simplified models of the Modular Multilevel Converter suitable for large-scale dynamic studies, in particular simulations under the phasor approximation. Compared to the existing ... [more ▼]

This paper focuses on simplified models of the Modular Multilevel Converter suitable for large-scale dynamic studies, in particular simulations under the phasor approximation. Compared to the existing literature, this paper does not a priori adopt the modeling approach followed for the original twolevel or three-level Voltage Source Converter. On the contrary, a model is derived following a physical analysis that preserves its average internal dynamic behavior. An equivalent control structure is proposed and various alternatives are highlighted. The proposed model with its controllers has been implemented in a phasor simulation software and its response has been validated against a detailed Electromagnetic Transient model. Finally, an illustrative example is presented with the application of the proposed model on a large grid consisting of AC areas interconnected with a multi-terminal DC grid. [less ▲]

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See detailPhysiological response to training and competition in 1-star to 4-star eventing horses
KIRSCH, Katharina; Düe, Michael; Holzhausen, Hermann et al

Poster (2016, June)

Abstract 034 – Physiological response to training and competition in 1-star to 4-star eventing horses – Post Review Authors’ names and affiliations Author 1: Katharina Kirsch* (German Olympic Committee ... [more ▼]

Abstract 034 – Physiological response to training and competition in 1-star to 4-star eventing horses – Post Review Authors’ names and affiliations Author 1: Katharina Kirsch* (German Olympic Committee for Equestrian Sports, Germany and PhD Student, University of Liège, Belgium) Author 2: Michael Düe (German Equestrian Federation, Germany) Author 3: Hermann Holzhausen (Olympic Support Center Westphalia – Warendorf, Germany) Author 4: Stephanie Horstmann (German Olympic Committee for Equestrian Sports, Germany) Author 5: Markus Scharmann (German Equestrian Federation, Germany) Author 6: Charlotte Sandersen (University of Liège, Belgium) *Address of the presenting author: Katharina Kirsch, Freiherr-von-Langen-Str. 15, 48231 Warendorf, GERMANY E-mail of the presenting author: kkirsch@fn-dokr.de Abstract Physiological response to training and competition in 1-star to 4-star eventing horses To prepare horses for the requirements of international eventing competitions and simultaneously maintain their health and welfare, appropriate training is mandatory. Specific training and competition management necessitates information about exercise intensities and fitness, which are usually assessed by standardized exercise tests. Our purpose was to identify parameters whose measurement can be largely integrated in the daily training and competition routine and which provide information on fitness and adequacy of applied training. Further, we evaluated training and competition intensities of eventing horses, based on data generated by a proportionally large group of horses over several years. Data of 187 horses from 1-star to 4-star level over a time period of six years were collected during 410 training sessions and 916 Cross Country rides, including measurement of covered distance and speed (GPS, Fidelak EquiPILOT), continuously recording of heart rate (HR) (Polar T52H) and determination of blood lactate concentrations (BLC) (Dr. Lange photometer). Characteristics of the track, altitude profile, ambient temperature and humidity were recorded at each session. The results of the one-way ANOVA indicated a significant effect of competition level on HR (F3,373=23.29; p<0.001) and BLC (F3,763=46.12; p<0.001). Under competition conditions, HR and BLC increased from 1-star to 3-star level (1-star: HR=194±9 bpm, BLC=7.7±5.6 mmol/l; 2-star: HR=198±9 bpm, BLC=9.6±6.2 mmol/l; 3-star: HR=205±10, BLC=15.6±9.8 mmol/l; 4-star: HR=207±2 bpm, BLC=12.4±9.3 mmol/l), while under training conditions, they decreased with increasing competition level (1-star: HR=184±29 bpm; BLC=18.9±11.1 mmol/l; 2-star: HR=182±19 bpm; BLC=12.1±9.0; 3-star: HR=174±25 bpm; BLC=6.9±7.1 mmol/l; 4-star: HR=161±24 bpm, BLC=4.0±5.6 mmol/l). On 1-/2-star level, BLCs after training exceeded those after competition. Reverse applied for 3-/4-star level. On 3-star level, the percentage of HRs above 200 bpm during Cross Country was considerably greater than on lower levels (1-star: 33%; 2-star: 54%; 3-star: 94%). The competition format (CCI/CIC) had no significant effect on the progress of HR. The altitude profile however, had a significant effect on HR (F1,201=26.72, p<0.001) and BLC (F1,89=25.56; p<0.001). Evaluation of physiological response to training and competition through implementation of measurement technology allows an assessment of the different impacts on exercise intensities and should be more commonly used to assess appropriateness of training and competition management in eventing horses. It should be further investigated if the detected discrepancies in the response to training and competition between levels are a result of different fitness ore varying training strategies. LP To meet the demands of international Eventing competitions, a systematic training of horses is necessary. Close monitoring of physiological response to exercise during training and competition can help to improve training. Keywords Exercise physiology; training; eventing; heart rate; lactate. [less ▲]

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See detailCommenter une vidéo de classe - Un marqueur d’apprentissage pédagogique ?
Jérôme, Françoise ULg; Delfosse, Catherine ULg; Detroz, Pascal ULg et al

Conference (2016, June)

Cette proposition de communication porte sur une tentative d’appréhender l’évolution d’enseignants en formation pédagogique par le biais d’une analyse comparative de leurs commentaires d’une séquence ... [more ▼]

Cette proposition de communication porte sur une tentative d’appréhender l’évolution d’enseignants en formation pédagogique par le biais d’une analyse comparative de leurs commentaires d’une séquence vidéo présentée en début et en fin de parcours. La vidéo comme support privilégié de l’analyse critique des pratiques enseignantes à des fins de développement professionnel fait déjà l’objet d’une abondante littérature. Nous avons voulu tester le potentiel de cette approche dans le cadre du cours « Description et analyse critique de pratiques d’enseignement et d’évaluation », commun aux formations CAPAES et Formasup organisées à l’Université de Liège. Le cours aborde les thématiques pédagogiques jugées incontournables pour procéder à une planification de qualité d’un dispositif d’enseignement. Les thématiques sont traitées par le biais des représentations spontanées des enseignants-participants et grâce à divers modèles et théories. Quinze enseignants observent et commentent la même séquence vidéo en début (septembre 2015) et en fin de cours (décembre 2015). La première série de commentaires représente leur appréhension spontanée d’une situation de classe « criblée » de maladresses pédagogiques en mobilisant leurs savoirs antérieurs au cours tandis que la deuxième série devrait mobiliser également des savoirs acquis pendant le cours. Il s’agit là d’une hypothèse à vérifier. La communication au congrès AIPU présentera les résultats de l’analyse comparative des écrits des enseignants. Nous pouvons déjà formuler quelques constats relatifs aux commentaires rédigés au temps 1. Les enseignants expriment en moyenne trois à cinq avis critiques pertinents concernant les attitudes de l’enseignant observé. Les élèves sont également critiqués mais des liens de cause à effet entre les comportements respectifs de l’enseignant et des élèves sont rarement établis. Aucune référence explicite à des théories pédagogiques n’est faite et peu de pistes de régulation sont proposées. Les enseignants mentionnent des points communs entre leurs expériences et la situation observée ou rejettent toute identification. Berliner, D.C. (2004). Describing the Behavior and Documenting the Accomplishments of Expert Teachers. Bulletin of Science, Technology & Society, Vol. 24, No. 3, June 2004, 200-212. Calandra, B., Brantley-Dias, L., Lee, J.K. & Fox, D.L. (2009). Using Video Editing to Cultivate Novice Teachers' Practice. Journal of Research on Technology in Education, 42(1), 73-94. Daujeard, C., Surrel, P. (2011). L'ABC des profs. 123 clés pour faire cours. Collection : Ressources Formation. Les clefs du quotidien. Fadde, P., & Sullivan, P. (2013). Using interactive video to develop preservice teachers’ classroom awareness. Contemporary Issues in Technology and Teacher Education, 13(2). Retrieved from http://www.citejournal.org/vol13/iss2/general/article1.cfm Missaoui, O.E.K. (2013). La vidéo pour la formation continue des enseignants. Thot Cursus. Formation et culture numérique. http://cursus.edu/article/19440/video-pour-formation-continue-des-enseignants/#.VkyHhL9m0dc Meyer, F. (2012). Les vidéos d’exemples de pratique pour susciter le changement. Revue internationale de pédagogie de l’enseignement supérieur, 28-2 | 2012. [less ▲]

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See detailCartels in the EU: who appeals and who wins?
Gautier, Axel ULg

Conference (2016, June)

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