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See detailPromote physical activity and reduce ageism across generations: effects of an intergenerational program
Mouton, Alexandre ULg; Heldenbergh, Corentin ULg; Flamion, Allison ULg et al

Conference (2016, June 09)

Introduction From early to later age populations, regular physical activity (PA) could be considered as a key behaviour to struggle against the major health, mental, social and economic issues of the 21st ... [more ▼]

Introduction From early to later age populations, regular physical activity (PA) could be considered as a key behaviour to struggle against the major health, mental, social and economic issues of the 21st century (Rippe & Angelopoulos, 2010). Among PA interventions, international scientific statements recommend an emerging approach targeting specific intergenerational dyads, such as grandparent-grandchild pairs (Marcus et al., 2006). Besides, Ory and colleagues (2003) underlined that intergenerational interactions could also combat aging stereotypes across generations. Accordingly, the aim of this study was to examine the effects of an intergenerational PA program on PA behaviours and aging stereotypes of grandparent-grandchild pairs. Methods Intergenerational grandparent-grandchild pairs were recruited in two Belgian municipalities. Those two groups took part in a three-month intergenerational intervention, adapted from a previous intervention (Mouton, Renier & Cloes, 2015) and including one weekly session of PA. Assessments were performed before (T0), during (process analysis) and after the intervention (T1). Grandparents PA was assessed with the QAPPA and the SF-36 questionnaires and with a battery of physical fitness test (SFT). The UCLA loneliness scale was also administrated to seniors. Grandchildren PA was evaluated with a seven items Likert scale. Relationship quality and ageism stereotypes between generations were assessed using a combination of existing validated instruments. Results and conclusions The intergenerational groups were composed of 14 dyads of grandparent (65±3.2 years)-grandchild (8.8±2.3 years) in one municipality and 6 dyads of grandparent (64±4.5 years)-grandchild (7.7±1.3 years) in the second. By its combination of physical and psychosocial objectives, the results of this study are expected to provide a significant and original contribution to the research field. If intergenerational PA has the potential to reduce ageism, it could pave the way to interdisciplinary interventions among physical education professionals. [less ▲]

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See detailReading a Vedic çastra
Swennen, Philippe ULg

Conference (2016, June 09)

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See detailThe Liège Game Lab: presentation of a young research center on videogames
Dozo, Björn-Olav ULg; Barnabé, Fanny ULg; Delbouille, Julie ULg et al

Conference (2016, June 09)

The main goals of the paper are, first, to present the Liège Game Lab, the different studies carried out in Liège on videogames and their specificities and, secondly, question our own position in the ... [more ▼]

The main goals of the paper are, first, to present the Liège Game Lab, the different studies carried out in Liège on videogames and their specificities and, secondly, question our own position in the research field. To do so, we will situate ourselves in relation to the main paradigms of game studies dominated in France by social sciences and in the world by English-speakers, with a particular attention to the domination’s concerns of a peripheral position. This paper will focus on presentation and discussion of the videogames’ study in a midsized French speaking University. The aim is, first and foremost, to question the domination’s issues related to a triple peripheral position: geographic, methodological and linguistic. - The University of Liège is indeed peripheral in Belgium, in comparison to the centrality, geographically speaking, of the Universities of Brussels and Leuven. - The main group working on videogames, in French speaking Belgium, is the LabJMV (the “Games and Virtual Worlds” Laboratory), where the anthropological and sociological perspectives are dominant, while in Liège we developed more a communicative and literary outlook. - The OMNSH (the main association about game studies in France), which could be our “natural” link to the field because of the sharing language, is also dominated by social sciences and separated by a political frontier which could be seen as a boundary. - The DIGRA (the Digital Games Research Association), at the opposite, is geographically close to us (given that they are present as a chapter in Flanders), but disconnected owing to the difference of language (they publish mainly in English, we publish mainly in French). Despite of this peripheral position and making of it a strategic observatory of the tendencies of game studies, an original research hub emerged in Liège for two years. We chose to work on objects and/or with methodological perspectives which diverge of mainstream game studies: amateur game making, videogame press, Belgian players’ uses and poetical perspective on gaming practices. Various contingencies brought together at the University of Liège several researchers working more or less directly on videogames: students’ demands to write master’s thesis on videogames, the rise of grants from funding agencies like FNRS to study this medium and the development of Digital Humanities in the University of Liège. It is time, now, to question ourselves about the situation of the game studies in the University of Liège, but also the place of this University in the international field of this discipline. In first approximation, we can postulate that this gathering of researchers generated a shared research process, whose specificities stem particularly from the triple peripheral position (geographic, methodological and linguistic) of the University of Liège in the game studies field – as explained earlier. However, we would like to discuss this hypothesis not only on our own,but publicly, in the context of an international conference. Consequently, with this paper, we aim to present our group questioning our shared position and, at the same time, to expose a comparison of our five perspectives on videogames in order to understand in what ways they match each other and in what ways they create fruitful opposition. Björn-Olav Dozo and Boris Krywicky are interested in French speaking videogame press with book history’s methods. Pierre-Yves Hurel examines amateur game design with sociological tools (the dominant methodology in French speaking game studies), but these are serving communication and political investigations. Fanny Barnabé studies the same kind of objects (players’ creative practices of “misappropriation”), but through a formal and poetic approach (she analyzes the works so produced and not the players’ activities). Julie Delbouille, at the opposite, adopted a sociological and quantitative methodology, but investigated a restricted category of gaming practices: the French speaking Belgian players. [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 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 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 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 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 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 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 detailSet theory and foundational mereology as logical tools for descriptive psychology
Leclercq, Bruno ULg

Conference (2016, June 07)

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

Conference (2016, June 03)

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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 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 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 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 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 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 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 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 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 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 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 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 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 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 detailDetection of myocardial ischemic memory using 99mTc-fucoidan: preclinical validation
Mikail, N; Louedec, L; Aid, R et al

Conference (2016, June)

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See detailModeling, sensitivity analysis and parameter identification of a twin screw extruder
Grimard, Jonathan; Dewasme, Laurent; Thiry, Justine ULg et al

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 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 detailCultural stratigraphy at Sibudu and its implications for our understanding of the MSA
Conard, Nicholas; Miller, Christopher; Rots, Veerle ULg et al

Conference (2016, June)

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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 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 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 detailShedding Light on the Dark Side of Customer Participation: Investigating Customer Participation Stress
Treger, Stephanie; Büttgen, Marion; Schumann, Jan Hendrik et al

Conference (2016, June)

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See detailShedding Light on the Dark Side of Customer Participation: Investigating Customer Participation Stress
Treger, Stephanie; Büttgen, Marion; Schumann, Jan Hendrik et al

Conference (2016, June)

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See detailThe influence of customer characteristics on the customer need knowledge of frontline employees
Hüttel, Björn; Schumann, Jan Hendrik; Büttgen, Marion et al

Conference (2016, June)

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See detailPOP measurements: Tracking Down the Part in the Quintillion
Focant, Jean-François ULg

Conference (2016, June)

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See detailFactorization of minimal substitutive subshifts
Leroy, Julien ULg

Conference (2016, June)

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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 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 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
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 detailWelfare and the creation of Undocumented EU migrants in Belgium
Mescoli, Elsa ULg; Lafleur, Jean-Michel ULg

Conference (2016, June)

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See detailEducation of instructors of a physical activity program for cancer patients and survivors: planning and evaluation of interactive adapted physical activity working groups
Rompen, Jérôme ULg; Korycki, Marta ULg; Ortmans, Sabine et al

Conference (2016, June)

Introduction Raviva is a Belgian adapted physical activity (APA) program for cancer patients and survivors, developed by the Belgian Foundation against Cancer (http://www.cancer.be/aide-aux-patients/la ... [more ▼]

Introduction Raviva is a Belgian adapted physical activity (APA) program for cancer patients and survivors, developed by the Belgian Foundation against Cancer (http://www.cancer.be/aide-aux-patients/la-fondation-votre-service/raviva-bouger-pour-se-sentir-mieux). Activities supported by this foundation are supervised by instructors with inconstant trainings and experiences. Indeed, in Belgium, APA instructors do not necessarily follow specific training programs such those proposed by the ACSM (Schmitz et al., 2010). As it is the case in sport coaches’ education (Erickson et al., 2008), interacting with colleagues and sharing knowledge could be an interesting way to improve APA instructors’ competencies. The aim of this study was to plan and analyse interactive APA working groups, as part of a training day intended for all Raviva instructors. Methods As part of this training, we proposed three practical physical activity working groups, each one concerning a specific activity: fitness, relaxation and aqua-aerobics. They were designed to generate some good practices in intervention with Raviva groups and had to be interactive: all participants had the opportunity to present their own practices and to discuss and comment the practices of the others. Three methods were used to analyse the activities: interviews of the organizers (n=4), a questionnaire for all trainees (n=35) and participant observation. Results Many examples of practical situations and good practices have been identified.79.4% of the trainees considered that the proposed method was interesting and 88.3% mentioned that they have been actively involved. The organizers were less convinced as they highlighted a lack of ideas sharing as well as low active participation and dynamism. Observations confirmed the organizers’ opinions. Conclusions Participants appeared to be globally satisfied with the practical activities. However, further research is needed to measure the impact of such methods on their future practices. [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 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 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 detailStructural classification and characterization of heavy petroleum base oil hydrocarbons by GC×GC-HR-TOF/MS
Giri, Anupam ULg; Courtiade, Marion; Racaud, Amandine et al

Conference (2016, May 31)

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See detailI Am Very Sorry Sir! Breaking Bad News to Customers
Delcourt, Cécile ULg; GREMLER, Dwayne; GREER, Dominique

Conference (2016, May 31)

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See detailSubstrats neuronaux de l'encodage non réussi dans le vieillissement
François, Sarah ULg; Angel, Lucie; Salmon, Eric ULg et al

Conference (2016, May 27)

Objectifs En utilisant l'IRM fonctionnelle, nous nous sommes intéressés à l'effet de l'âge sur les substrats neuronaux de l'encodage non réussi – l'activation à l'encodage pour les items oubliés par la ... [more ▼]

Objectifs En utilisant l'IRM fonctionnelle, nous nous sommes intéressés à l'effet de l'âge sur les substrats neuronaux de l'encodage non réussi – l'activation à l'encodage pour les items oubliés par la suite. Méthodologie Dans un scanner IRM, nous avons soumis des volontaires (20 jeunes et 19 âgés) à une tâche de mémoire épisodique avec consignes d'encodage incident. Durant celle-ci, des dessins d'objets en noir et blanc leur étaient présentés. Il leur était demandé d'effectuer un jugement de taille sur ces objets. Ensuite, toujours dans le scanner, les objets de la phase d'encodage ainsi que de nouveaux objets leurs étaient présentés afin d'évaluer leur reconnaissance de ceux-ci. Pour ce faire, les volontaires effectuaient un jugement de Recollection/Familiarité/Nouveauté. Résultats Les résultats comportementaux montrent une recollection altérée mais une familiarité préservée chez nos volontaires âgés. L'analyse des résultats IRM a été effectuée selon un design évènementiel (SPM8), dans lequel nous avons comparé les aires cérébrales activées à l'encodage pour les items qui n'ont pas été reconnus ultérieurement et pour ceux qui ont donné lieu à un jugement de recollection (p<.001 non-corrigé). Dans les deux groupes, un pattern d'activation correspondant au réseau du mode par défaut (RMD). Chez les volontaires âgés, les résultats ont également mis en évidence une activation supplémentaire du réseau attentionnel fronto-pariétal. Ensuite, le contraste entre les activations pour les items qui n'ont pas été reconnus ultérieurement et ceux qui ont donné lieu à un jugement de familiarité a aussi mis en évidence des régions du RMD, mais dans une moindre mesure. En effet, les activités communes aux deux groupes d'âge n'ont montré qu'une activation du précuneus. Discussion Comparé à la recollection, l'oubli d'informations semble associé, à l'encodage, à un recrutement accru du RMD qui pourrait refléter une incapacité à mettre en place des processus d'encodage efficaces, à la fois chez les jeunes adultes et les adultes plus âgés. De plus, l'activation supplémentaire du réseau fronto-pariétal chez ces derniers pourrait indiquer un fonctionnement moins différencié des réseaux cérébraux associés à l'encodage en mémoire. Lorsque l'on compare l'oubli d'informations à la familiarité, l'activation moindre du RMD pourrait suggérer qu'un certain niveau d'activation du RMD (et donc la présence de pensées étrangères à la tâche) n'empêche pas forcément toute reconnaissance sur base d'un sentiment de familiarité. [less ▲]

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See detailOn the laser additive manufacturing of metal matrix composites
Mertens, Anne ULg; L'Hoest, Thibaut; Lecomte-Beckers, Jacqueline ULg et al

Conference (2016, May 27)

This paper reviews the challenges and opportunities related to the production of of metal matrix composites (MMCs) and functionally graded materials (FGMs) by additive manufacturing laser-based ... [more ▼]

This paper reviews the challenges and opportunities related to the production of of metal matrix composites (MMCs) and functionally graded materials (FGMs) by additive manufacturing laser-based technologies. Special attention is given to issues such as the stability of the reinforcement particles under the laser beam, particles’ dissolution in the metallic melt pool and interfacial reactions between the particles and the metallic matrix. Illustrations are taken from a preliminary investigation, by the MMS Unit, into the laser cladding of stainless steel + carbides composite coatings, as well as from the open scientific literature. [less ▲]

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See detailL’initiative citoyenne européenne : porte ouverte des institutions européennes pour le citoyen?
Debras, François ULg; Nossent, Jérôme ULg

Conference (2016, May 27)

L’objectif de notre recherche n’est pas de nous concentrer sur la création ni sur le parcours d’une initiative citoyenne européenne mais bien d’étudier les conséquences politiques qui ont suivi ces ... [more ▼]

L’objectif de notre recherche n’est pas de nous concentrer sur la création ni sur le parcours d’une initiative citoyenne européenne mais bien d’étudier les conséquences politiques qui ont suivi ces initiatives. Pour ce faire, et compte tenu de la proximité temporelle du lancement du procédé, nous proposons de concentrer notre analyse sur les différentes suites qui furent données à la première des trois propositions ayant abouti, « Right2water ». Hormis la réponse obligatoire de la Commission, nous analysons l’impact et la mobilisation des enjeux de l’initiative par les institutions, les partis politiques, les députés européens et nationaux. L’initiative citoyenne européenne s’est-elle traduite en règlements ? En propositions ? A-t-elle été récupérée dans des programmes et discours politiques ou, à l’inverse, a-t-elle été écartée de l’agenda politique européen ? En d’autres mots, les propositions citoyennes ont-elles un poids sur la scène politique européenne ? L’initiative ouvre-t-elle la porte des institutions aux revendications des citoyens ? [less ▲]

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See detailExposition et mythologie mass-médiatique : le cas Jean Paul Gaultier (Paris, 2015)
Duchesne, Caroline ULg

Conference (2016, May 27)

Présentation d'une étude de cas envisageant les contaminations réciproques entre culture de masse et haute culture.

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See detail• BibliothEP: a study evaluating the effectiveness of bibliotherapy for premature ejaculation
Kempeneers, Philippe ULg; Andrianne, Robert ULg; Bauwens, Sabrina et al

Conference (2016, May 27)

Objective. The BibliothEP study aimed to assess the efficacy of a bibliotherapy for premature ejaculation (PE) Design and method. The study was conducted in two phases. First, a sample of 120 participants ... [more ▼]

Objective. The BibliothEP study aimed to assess the efficacy of a bibliotherapy for premature ejaculation (PE) Design and method. The study was conducted in two phases. First, a sample of 120 participants suffering from PE read a concise cognitive behavioural self-help manual for PE (51 A5 pages including illustrations) and were compared after treatment to 66 waiting list controls. Second, 36 subjects received and read the self-help manual and were compared after treatment to 32 subjects having received the same manual plus a complementary brief guidance (45-90 minutes) from a coach not specialised in sex therapy, but who had been specifically trained to support the bibliotherapy intervention (by attending a 5-hour training module). The main outcome measures were self-determined latency time to ejaculation, feelings of control, sexual satisfaction, PE-related distress and subjective impression of improvement. Results. At 6-month posttreatment, all participants showed significant improvements as compared to waiting list condition. The improvements were maintained at 12 month. They were slightly greater in the case of complementary therapist support. Improvements were demonstrated for all forms of PE, but the intervention appeared to be slightly more effective when the problem was of moderate severity. In all cases, improvements in sexual functioning were accompanied by improvements in sexual cognitions. Conclusions. The cost-effectiveness of the self-help manual makes it a valuable first-line treatment for any form of PE. Moreover, the outcome of the bibliotherapy process might be increased by coaching from a health worker specifically trained to this aim. [less ▲]

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See detailLa médiation du média : adresse au lecteur, positions, dispositions
Servais, Christine ULg

Conference (2016, May 26)

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See detailEntre Rome, Bruxelles et l’Espagne : le confesseur du gouverneur-général, quelles loyautés ?
Pirlet, Pierre-François ULg

Conference (2016, May 26)

Les Pays-Bas catholiques de la première moitié du XVIIe siècle constituent un ensemble politique placés sous la direction d'un gouverneur-général de sang royal ou issu de la haute noblesse hispanique. La ... [more ▼]

Les Pays-Bas catholiques de la première moitié du XVIIe siècle constituent un ensemble politique placés sous la direction d'un gouverneur-général de sang royal ou issu de la haute noblesse hispanique. La cour de ce Prince est organisée sur le modèle madrilène : il est ainsi assisté par un confesseur particulier, choisi par le gouvernement royal pour ses qualités et pour son appartenance à l'un ou l'autre ordre religieux. Les religieux successifs qui occupent la charge font l'objet d'une attention soutenue de la part de différents acteurs politiques : le gouverneur-général lui-même, les courtisans bruxellois, le gouvernement royal, les ordres religieux et la papauté observent avec attention l'action de ces confesseurs. La vision qu'a Rome de ces clercs est celle d'alliés objectifs. Il est entendu que ceux-ci doivent naturellement assister le nonce en toute occasion et contribuer à asseoir la politique romaine en terres habsbourgeoises. Pourtant, à Bruxelles, les principaux intéressés ne suivent pas assidûment cette ligne directrice. Ma communication proposera d'étudier, sur la base de sources issues des Archives générales du Royaume de Belgique et de l'Archivo General de Simancas, l'attitude d'une série de confesseurs princiers actifs dans la grande première moitié du XVIIe siècle face aux attentes de la papauté et de ses représentants dans le but de comprendre dans quelle mesure ce clerc contribua à – ou se tint éloigné de – la politique telle que voulue depuis Rome. Je tâcherai également de recenser et de comprendre les loyautés – à Madrid, à Bruxelles et à Rome – conditionnant l'action de ce religieux. [less ▲]

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See detailRedrawing Comics into the Graphic Novel: the Historiography of Comics, Canonization, and Authors’ Histories of the Medium
Crucifix, Benoît ULg

Conference (2016, May 26)

The development of comics studies in the United States has been linked to the institutionalization of the ‘graphic novel’ as a ‘literary’ subset of comics deemed worthy of academic attention. Several ... [more ▼]

The development of comics studies in the United States has been linked to the institutionalization of the ‘graphic novel’ as a ‘literary’ subset of comics deemed worthy of academic attention. Several voices in North-America are now challenging the need for canon formation by arguing for other approaches to the historiography of comics beyond the graphic novel. Histories and definitions, however, as Thierry Smolderen argues, are not only written by scholars, but generated by a multiplicity of social groups actively participating in the ongoing negotiation of what the medium ‘is’. Drawing on these recent trends, I will engage in a disciplinary reflection on the historiography of comics by focusing on authors' histories of the medium. Cartoonists themselves indeed act as comics historians: suffice to think of Jules Feiffer's pioneering The Great Comic Book Heroes (1965). ‘Graphic novelists’ as Chris Ware, Art Spiegelman, Seth or Daniel Clowes have been deeply engaged in recovering the past of comics in their works as well as in essays, reprints, or exhibitions. These histories are fragmentary, emotionally charged and at times anachronistic, but they complicate teleological accounts of the graphic novel, disrupting the academic canon. Confronting this perspective with recent insights in literary historiography, I will attempt to examine some of the specific epistemological issues raised by cartoonists' histories of comics in their divergence or convergence with other historiographic trends such as fanzines and academic research. [less ▲]

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See detailUnderstanding the effect of thermal treatments on the ductility of LBM AlSi10Mg
Mertens, Anne ULg; Dedry, Olivier ULg; Lecomte-Beckers, Jacqueline ULg et al

Conference (2016, May 26)

This communication reviews the additive manufacturing activities of the MMS Unit, University of Liège, with a particular focus on the study of post-processing treatments of Al alloy AlSi10Mg. Al alloy ... [more ▼]

This communication reviews the additive manufacturing activities of the MMS Unit, University of Liège, with a particular focus on the study of post-processing treatments of Al alloy AlSi10Mg. 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 mechanical and microstructural evolution induced upon heat treating LBM AlSi10Mg. [less ▲]

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See detailEntre Rome, Bruxelles et l’Espagne. Une légation au service de la Monarchie de Philippe II
Regibeau, Julien ULg

Conference (2016, May 26)

La légation des Pays-Bas espagnols et de la Franche-Comté près le Saint-Siège au temps de l’agent Laurent du Blioul (1573-1598) n’a jamais véritablement rencontré l’intérêt des historiens. Cela est ... [more ▼]

La légation des Pays-Bas espagnols et de la Franche-Comté près le Saint-Siège au temps de l’agent Laurent du Blioul (1573-1598) n’a jamais véritablement rencontré l’intérêt des historiens. Cela est certainement dû à son manque d’envergure apparent. En effet, elle est, à cette époque, soumise à l’ambassadeur espagnol de Philippe II à Rome et la marge de manœuvre de son agent semble réduite au suivi technique des affaires ecclésiastiques des pays de par-deçà et de par-delà défendues devant la Curie. Une analyse sociopolitique de l’institution permet cependant de nuancer le propos. En dégageant la place que la légation occuperait au sein des puissants réseaux de pouvoir romains de la Monarchie, on constate en effet que celle-ci est loin d’être marginalisée. Au contraire, à travers l’action de son agent, elle est capable d’utiliser mais aussi d’entretenir et d’accroitre l’influence que la royauté exerce sur la ville. Sachant employer efficacement les nombreuses ressources exogènes qu’elle a à sa disposition, l’institution n’apparait alors plus comme le reflet d’une décadence diplomatique des Pays-Bas qui découlerait de l’éclatement et de l’enlisement de la Révolte. Au contraire, elle trouve sa place dans une certaine logique d’incorporation inhérente à la monarchie de Philippe II. Après quelques considérations autour des missions de la légation, cette communication se concentrera avant tout sur le rôle de son agent, Laurent du Blioul. Membre d’une dynastie de gens de robe au service de la maison d’Autriche depuis la fin du XVe siècle, il conserve un souvenir vivace de ces liens, vecteurs de prestige et d’ascension sociale. Nous montrerons en quoi ce service implique des liens d’obligations réciproques entre les du Blioul et leur souverain. [less ▲]

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See detailBrain breaks in the classroom. An example of implementation in Belgium
Cloes, Marc ULg; Cloes, Stéphanie

Conference (2016, May 26)

School is identified as the main pillar of the fight against sedentariness in youth. Several models of active schools have been described in the literature and, under the umbrella of the school policy ... [more ▼]

School is identified as the main pillar of the fight against sedentariness in youth. Several models of active schools have been described in the literature and, under the umbrella of the school policy enhancing physical activity (PA), five main dimensions can be identified (Physical education, Active transportation, Life environment, Sport at school, PA in the classroom). This underlines that, if the PE teacher is considered as the corner stone of the PA promotion at school, (s)he is not alone to create the conditions aiming to permit to the children to reach the PA level recommended daily. Integrating more PA in the classroom seems to be a promising approach for children lifestyle as well as for their overall learning. Worldwide, initiatives are proposed in order to convince classroom teachers to integrate more often PA in their educational activities. Nowadays, it seems determining to share experiences in order to identify good practices and solutions to the current problems that teachers can encountered on the field. The goal of this presentation is to illustrate two concrete examples of projects implemented in primary schools in Wallonia, Belgium. We will describe the teaching context as well as the main findings provided by a systematic data analysis conducted during these experiments. The first study focused on three classes proposing Brain Breaks (BB) videos during a 10 weeks period. The attitude of the pupils and the teaching staff opinions were analyzed. In the second study, varied PA breaks (BB video, games, and video developed by the pupils) were proposed during periods of two to four weeks. Data from participant observation and questionnaires were used. In both studies, findings support the planning of PA during classroom. Even if more controlled research designs would be necessary in order to determine the evidence of the results, we can state that practitioners and children involved in the projects showed really positive reactions about these opportunities to be more active. [less ▲]

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See detailAnalyse de la potentialité des outils d’auto-organisation en Wallonie : l'exemple d’un habitat groupé liégeois, les Zurbains
Dethier, Perrine ULg; Halleux, Jean-Marie ULg

Conference (2016, May 25)

La régénération urbaine doit faire face à de nombreux obstacles. Parmi ceux-ci, les plus significatifs sont la réduction des finances publiques ainsi que des obstacles plus structurels comme la captation ... [more ▼]

La régénération urbaine doit faire face à de nombreux obstacles. Parmi ceux-ci, les plus significatifs sont la réduction des finances publiques ainsi que des obstacles plus structurels comme la captation des plus-values foncières pour financer les infrastructures publiques, la coopération entre le secteur public et privé ou la complexité croissante des projets par l’augmentation des acteurs concernés (commune, région, propriétaires fonciers, promoteurs, développeurs, habitants…). Afin de répondre à ce contexte changeant, de nombreuses villes, notamment américaines, anglaises ou néerlandaises, mettent en place des outils d’auto-organisation (‘Buisness improvement district’, ‘tax increment financing’, …) (van der Krabben et Needham, 2008 ; Meerkerk et al., 2013 ; Peyroux et al., 2012 ; Squires et Lord, 2012)1. Dans cette recherche, nous définissions le terme d’auto-organisation comme : « l’émergence et le développement d’initiatives naissant d’un réseau construit en dehors des institutions gouvernementales ou autres et qui peut se rattacher ultérieurement à ces institutions » (Huygen et al., 2012)2. Quatre caractéristiques centrales distinguent le concept d’auto-organisation d’autres formes de participation : les motivations intrinsèques des acteurs, l’organisation par le biais d’un leadership pertinent, l’autonomie vis-à-vis des institutions et la spontanéité et créativité. Alors que dans certains pays, les outils d’auto-organisations deviennent courants, peu d’exemples sont présents en Wallonie. Pourtant, ils pourraient répondre, en partie, aux problèmes de recyclage urbain mis en évidence (Halleux et al. 2004)3. Par le champ de l’économie comportementale, nous étudierons l’exemple d’un habitat groupé liégeois, les Zurbains. « L’économie comportementale est un champ de l’économie qui se fonde sur le comportement des êtres humains observé dans la réalité et/ou en laboratoire afin d’expliquer les choix économiques des acteurs économiques » (Hanne, 2012)4. Ce courant économique remet en cause le concept l’Homo oeconomicus, la représentation théorique du comportement humain en économie néo-classique. Les Zurbains sont un projet d’habitat groupé sur une vaste friche (8 500 m²) située dans un quartier populaire de Liège, Saint-Léonard. En 2005, vingt-six ménages font l’acquisition de ce terrain dans le but d’y réaliser un ensemble de logements basse énergie. Il faudra attendre 9 ans entre l’achat du terrain et l’installation des premiers habitants. Par l’analyse de trois grandes composantes du comportement économique, nous essayerons de comprendre quels ont été les freins au développement du projet et comment les comportements des acteurs ont influencé la réussite du projet. L’analyse portera sur le partage des risques, la confiance entre les acteurs et l’évolution de coopération (inter et extra groupe). Le projet présente de nombreux intérêts à la fois individuels (logement neuf en centre urbain, économie d’échelle) et collectifs (réhabilitation d’une friche, aide financière régionale pour la commune pour l’aménagement des espaces publics alentours). Cependant son développement a été confronté à de nombreux obstacles : la prise de risque prise due au manque d’expertise dans le montage de projet urbain, une rupture de confiance entre les maîtres d’œuvre et le maître d’ouvrage, une collaboration pas toujours évidente entre le privé (les Zurbains) et le public (la ville ou les gestionnaires des impétrants). Sur base de rencontres avec les acteurs, il s’agira dès lors de dégager les forces et les faiblesses des acteurs wallons dans le développement de projet auto-organisé et d’analyser la potentialité de ce type de projet. [less ▲]

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See detailL'effet de l'écrouissage rotationnel sur le comportement des sols argileux
Ahayan, Sanae ULg; Yin, Zhen-Yu; Kotronis, Panagiotis et al

Conference (2016, May 25)

Induced anisotropy is a constitutive feature of clays that can be introduced through a proper "Rotational hardening law" allowing the rotation of the yield and the potential plastic surfaces in the stress ... [more ▼]

Induced anisotropy is a constitutive feature of clays that can be introduced through a proper "Rotational hardening law" allowing the rotation of the yield and the potential plastic surfaces in the stress space. Two rotational hardening laws are studied in this paper. Validation is provided using the results of a drained triaxial test of a Finnish clay. Finite Elements simulations of a circular rigid footing considering an isotropic and anisotropic constitutive laws are presented. The objective is firstly to identify the influence of the isotropy assumption in geotechnical design and secondly to study the effect of different hardening laws on the foundation behavior. [less ▲]

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See detailIn situ and laboratory mechanical characterization of a loess sequence from Middle Belgium
Delvoie, Simon ULg; Charlier, Robert ULg; Collin, Frédéric ULg

Conference (2016, May 25)

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone ... [more ▼]

A 10 m thick loess (aeolian silt) layer located beside the Romont quarry (Eben-Emael, Middle Belgium) has been investigated in order to characterize the mechanical behaviour of the silty material. Cone penetration tests (CPT) have been performed with different cones (M1-type, M2-type and electric) in order to evaluate the influence of the cone on the mechanical behaviour interpretation. Concurrently, laboratory tests have been performed on undisturbed samples from core drillings. Laboratory tests consist of a physical characterization (grain size distribution, Atterberg limits) and a mechanical characterization (oedometer tests). This comprehensive investigation study focuses on the comparison of the loess characterization between in situ and laboratory approaches. CPT-based soil behaviour type charts are analyzed and compared with the Unified Soil Classification System. Many relations also exist in the literature between parameters obtained from CPT results and from laboratory tests. The study explores the existing relations between the cone resistance and the oedometer constrained modulus in order to verify the related coefficients proposed in the literature for silty material. [less ▲]

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See detailPériurbanisation et efficacité de l'usage de la ressource foncière à Kinshasa
Messina Ndzomo, Jean Pierre ULg; Mate, Jean-Pierre; Halleux, Jean-Marie ULg

Conference (2016, May 25)

Kinshasa est la capitale de la République Démocratique du Congo et la plus grande ville francophone d’Afrique subsaharienne sur le plan démographique et spatial. Alors que Kinshasa comptait 400 000 ... [more ▼]

Kinshasa est la capitale de la République Démocratique du Congo et la plus grande ville francophone d’Afrique subsaharienne sur le plan démographique et spatial. Alors que Kinshasa comptait 400 000 habitants en 1960, son volume de population est actuellement estimé entre 8 et 12 millions d’habitants. La forte croissance démographique de cette ville, dont le taux de progression se situerait autour de 4 % depuis 2000, justifie sa dynamique spatiale. La conséquence immédiate est l’étalement urbain et une urbanisation non maitrisée favorisés par l’accroissement de la demande en logement. La crise du logement est de plus en plus forte dans un contexte marqué par une faiblesse des politiques publiques sur l’habitat. La géographie urbaine de Kinshasa connait, en conséquence, de profondes mutations depuis quelques décennies, des quartiers centraux et péricentraux se densifient et des lotissements périurbains colonisent de vastes territoires. Plus spécifiquement la périurbanisation, phénomène d’étalement des villes, s’y impose très largement. La présente communication porte sur notre projet de thèse qui cherche à comprendre les relations entre les mécanismes fonciers et la production de l’urbanisation à Kinshasa. De manière synthétique, la recherche est basée sur l’hypothèse que l’urbanisation de Kinshasa est spatialement inefficace. Elle est de plus en plus éloignée du centre-ville et des axes principaux et colonise vraisemblablement les zones physiquement inappropriées à l’urbanisation. Il ressort de notre revue de la littérature que l’urbanisation de Kinshasa résulte de dynamiques variées. D’un côté, nous assistons à une très forte densification de certains quartiers. D’un autre côté, la ville connaît un étalement urbain qui s’accompagne du développement de quartiers périphériques à faible densité. La première partie de notre travail vise à quantifier le phénomène d’urbanisation à Kinshasa. Cette quantification sera établie sur base des sources statistiques disponibles. Elle mobilisera également les techniques de la télédétection, afin de suivre l’évolution spatiale de la croissance urbaine. Cette partie du travail permettra notamment de vérifier l’hypothèse consistant à considérer que la croissance de Kinshasa oppose et conjugue des dynamiques de forte densification à des dynamiques d’étalement urbain. C’est cette partie du travail qui devra notamment permettre de vérifier si les logiques d’étalement urbain engendrent un gaspillage de ressources foncières préjudiciables aux activités de l’agriculture (péri) urbaine et au maintien du couvert forestier. La seconde partie de notre travail consistera dans le développement d’enquêtes. Des enquêtes seront menées auprès de deux publics cibles : d’une part, les acteurs actifs dans la production urbaine et, d’autre part, les populations. Enquêter auprès des acteurs de la production urbaine (architectes, promoteurs, planificateurs, chefs traditionnels, administrations : urbanisme, habitat et affaires foncières,…) devra permettre une compréhension des mécanismes fonciers et immobiliers qui alimentent la production du logement à Kinshasa (nous pensons en particulier au rôle des prix et des valeurs sur les phénomènes de densification et d’étalement urbain). En parallèle, enquêter auprès des populations visera à évaluer le niveau d’efficacité spatiale de l’urbanisation mise en place. Développer ce sujet de l’efficacité spatiale consistera à vérifier si, d’un côté, la densification n’atteint pas des niveaux critiques et si, d’un autre côté, l’étalement ne conduit pas à des déplacements – et donc à des coûts de transport – inutiles. [less ▲]

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See detailÀ la redécouverte d’une série d’autels égyptisants romains
Veymiers, Richard ULg

Conference (2016, May 25)

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See detailCatalytic transformation of CO2: from monomers to polymers
Alves, Margot ULg; Grignard, Bruno ULg; Boyaval, Amélie ULg et al

Conference (2016, May 24)

Valorising CO2 as a renewable C1 feedstock for producing added value building blocks is the scope of many academic and industrial researches. Carbon dioxide is a thermodynamically and kinetically stable ... [more ▼]

Valorising CO2 as a renewable C1 feedstock for producing added value building blocks is the scope of many academic and industrial researches. Carbon dioxide is a thermodynamically and kinetically stable molecule that can be converted into five membered cyclic carbonates by coupling with epoxides using organometallic complexes or organocatalysts. To date, the identification and development of highly efficient (organo)catalysts under mild experimental conditions still remains challenging. In particular, the synthesis of six membered cyclic carbonates by the CO2/oxetane coupling using such organocatalysts has never been reported to our knowledge. In this context, we developed a new highly efficient bicomponent homogeneous organocatalyst composed of an ammonium salt as the catalyst and fluorinated single or double hydrogen bond donor activators (HBD). First, the efficiency of this new organocatalyst for the fast and selective CO2/epoxide coupling was investigated through detailed kinetic studies by IR spectroscopy under pressure and results were compared with the most efficient organocatalysts reported in the literature. This study was completed by molecular modeling in order to elucidate the reaction mechanism. DFT calculations showed that the hexafluoroisopropanol functionalities of HBDs strengthened the proton donor capability and allowed a better stabilization by hydrogen bonding of the intermediates and transition states. Finally, the use of this dual organocatalyst was extended to the coupling of CO2 with less reactive oxetanes to produce hydroxyl telechelic oligocarbonates. [less ▲]

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See detailHow to improve the valorisationprocess of End-Of-Life vehicles? LCA as a tool to help decision
Belboom, Sandra ULg; Lewis, Grégory; Bareel, Pierre-François et al

Conference (2016, May 24)

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See detailInterface nanoparticules de métal - carbone: de la physico-chimie de base aux catalyseurs Pt/C
Busby, Yan; Felten, Alexandre; Gulas, Michal et al

Conference (2016, May 24)

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