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See detailThe Belgian Tetris: assessing the political impact of metaphors on citizens' perceptions of Belgian federalism
Perrez, Julien ULg; Reuchamps, Min

Conference (2014, June 20)

In the literature, the political impact of metaphors has often been taken for granted from metaphor analysis in political discourse, be it elite discourse or media discourse. However, a more global ... [more ▼]

In the literature, the political impact of metaphors has often been taken for granted from metaphor analysis in political discourse, be it elite discourse or media discourse. However, a more global understanding of what this political impact could consist of, is still lacking from the current research agenda. As Koller (2009:121) puts it: “metaphor helps construct particular aspects of reality and reproduce (or subvert) dominant schemas.” To be able to account for how metaphors, through discourses, actively shape the political reality, it is important to look at the relationships between metaphorical discourses and their environment. Based on the idea that metaphors do not only reflect the perceived reality, but also function as cues through which citizens come to understand complex political processes and through which they shape political behaviors, the aim of this study is precisely to look at how specific metaphors might impact on the citizens’ framing of Belgian federalism. To measure the impact of metaphors on the citizens’ political representations and attitudes, we developed an experimental set-up based on an article published in the Belgian newspaper Le Soir (13-14 July 2013) in which Belgian federalism was deliberately compared to a Tetris game. The original article included a picture and a text (208 words), which were used as authentic experimental material. For this experiment, we distinguished three experimental conditions and one control condition. In the first experimental condition (full condition), the participants were exposed to the original article (including the text and the picture). In the second and third experimental conditions, the participants were respectively exposed either to the text (text condition) or the picture (picture condition). In the control condition, the participants weren’t exposed to any metaphorical material at all. In the second stage of the experiment, the participants were asked to achieve three interrelated tasks: (i) a free description task, based on a free description of their own perception of Belgian federalism, (ii) an association task, in which they had to select a picture which they found the most appropriate to describe Belgian federalism, and finally (iii) a questionnaire measuring the participants’ political knowledge of Belgian federalism and attitudes towards its future development. In a post-test held four weeks after the first experiment, the three tasks of the second stage have been replicated. This experiment has been conducted in autumn 2013 among 400 students. Comparing the various experimental conditions will make it possible (i) to measure the impact of the Tetris metaphor on the citizens’ perceptions and representations of Belgian federalism, (ii) to assess to what extent the different metaphorical media differently contribute to this impact and (iii) to measure the long-term impact of this metaphor on the citizens’ political representations and attitudes. In answering these questions, this study will contribute to a better understanding of the role and functions metaphors play in political discourse, and more globally in our everyday political interactions. [less ▲]

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See detailUn panorama du temps. Robida chroniqueur des Expositions universelles
Stienon, Valérie ULg

Conference (2014, June 19)

Robida est familier des Expositions universelles. Sa carrière de dessinateur-journaliste est en grande partie rythmée par les événements sociaux qu’elles constituent. Il illustre le démontage de ... [more ▼]

Robida est familier des Expositions universelles. Sa carrière de dessinateur-journaliste est en grande partie rythmée par les événements sociaux qu’elles constituent. Il illustre le démontage de l’Exposition de Paris de 1867 dans le Journal Amusant du 9 novembre 1867. Il est envoyé à Vienne comme dessinateur-correspondant du Monde illustré pour celle de 1873. Il visite l’Exposition de 1889 et en rend compte en double-page dans La Vie Parisienne du 11 mai 1889 (« Demandez, l’inauguration officielle de la Tour ! »). Enfin, il participe activement à l’Exposition de 1900 avec la reconstitution minutieuse, pendant près de deux ans, du « Vieux Paris », une attraction à succès située entre le Pont de l’Alma et la passerelle Debilly. En tant que manifestation très fréquentée, qui fait l’objet d’une abondante publicité et qui engage l’image d’une ville à dimension internationale, l’exposition dans ses diverses formes (universelle, internationale, industrielle) constitue un nouveau mode de communication et un lieu de sociabilité spécifique dans la seconde moitié du XIXe siècle. Le chroniqueur, le journaliste et le dessinateur sont amenés à commenter et à représenter ce type d’événement célébratif qui implique tout à la fois une esthétique de la monstration, une rhétorique publicitaire et une réflexivité patrimoniale sur le siècle. Lieu de présentation de l’innovation, animé par un imaginaire du progrès technique et industriel, l’exposition a pu ainsi constituer une matrice féconde pour l’œuvre d’anticipation de Robida. Cette communication propose d’examiner ce que la production de Robida doit aux discours et aux représentations liés aux Expositions universelles dans les deux décennies de 1880 et 1890. Des thématisations explicites, des visites fictives en mots et en images, ainsi qu’un abondant intertexte d’actualité témoignent de ce rapport à un discours social qui traverse une œuvre conjecturale ambiguë. Si les liens thématiques du Vingtième Siècle à l’Exposition Internationale d’Électricité de 1881 sont bien connus, il faut aussi envisager les aspects de la production de Robida qui impliquent le support journalistique. C’est le cas des dessins de presse qui préparent de manière critique la réception des Expositions, comme le montre la couverture de La Caricature du 16 juin 1886 faisant, trois ans à l’avance, l’éloge paradoxal du projet de métro aérien coupable d’encombrer le ciel parisien. C’est aussi le cas des inventions moquées dans sa correspondance fictive avec le dessinateur Christophe entre 1896 et 1901 dans « La Boîte aux lettres » du Petit Français illustré, où Robida-Théodule Asenbrouck imagine des machines telles que la « pince-scie-brosse-polissoir électrique » pour découper la Lune en douze tranches afin d’éclairer les grandes capitales, en particulier la Ville-Lumière. L’Exposition constitue également un cadre de transposition fictive créatif, comme en témoigne le récit sériel Jadis chez aujourd’hui du Petit Français illustré, imaginant Louis XIV et sa cour transportés à l’Exposition universelle de 1889 et visitant la Galerie des Machines avec un regard décalé sur l’époque contemporaine. Des éléments graphiques et stylistiques récurrents résultent de ce commentaire journalistique des Expositions, à l’image d’une tour Eiffel dont un seul pied suffit à constituer un indicateur chrono-topographique symbolisant la modernité contestée. Enfin, on peut considérer comment Robida prolonge à sa manière des inventions existantes, notamment dans l’illustration du texte d’Octave Uzanne La Locomotion future, paru dans Le Monde Moderne en 1895, ou avec la voiture aéroplane déclinée à partir du quadricycle Daimler apparu à l’Exposition de 1889. Le dialogue attentif et moqueur de Robida avec les projets et les discours des Expositions universelles permet de reconsidérer l’humour de l’anticipateur en le situant plus résolument dans les registres satirique et fantaisiste propres à prendre en charge les facéties du « feu congelé », du « poney-vapeur » ou du « perce-brouillard à hélice nasale », que dans la seule prospective pessimiste d’un génial visionnaire. Cet angle d’étude de l’œuvre d’anticipation offre aussi l’occasion d’examiner la part de l’intertexte d’actualité intervenant dans une pratique générique, graphique et éditoriale du panorama temporel. Entendons par là la littérature des guides pour visiteurs d’Expositions qui renoue avec une tradition des Petits-Paris initiée dans la littérature « panoramique » des années 1840. Ces parcours-découvertes balisés et ces bilans des curiosités urbaines ne sont pas sans évoquer ceux auxquels contribue Robida dans Le Vieux Paris. Guide historique, pittoresque et anecdotique (une cinquantaine de dessins), dans l’illustration du guide satirique L’Exposition comique (Dentu, 1889) ou encore dans le récit illustré du Dix-neuvième Siècle. S’ils s’articulent à un passé patrimonial sous la forme d’un inventaire du siècle qui se regarde réflexivement, ils ont aussi pu contribuer à l’anticipation en associant scènes dynamiques et vues d’ensemble dans un parcours temporel indissociable de ses dimensions topographiques. [less ▲]

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See detailThe potentiality of PDMAEMA-based polycation for cardiovascular applications
Flebus, Luca ULg; Lombart, François ULg; Martinez, Lucia et al

Conference (2014, June 18)

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See detailThe search for a core functionality network in chondrocyte differentiation using heuristic and genetic algorithms
Kerkhofs, Johan ULg

Conference (2014, June 18)

Introduction: In the growth plate a continuing process where cartilage is replaced by bone provides the fuel for bone growth until its closure towards the end of puberty. At the cellular level the growth ... [more ▼]

Introduction: In the growth plate a continuing process where cartilage is replaced by bone provides the fuel for bone growth until its closure towards the end of puberty. At the cellular level the growth rate is maintained by proliferation and enlargement of maturing cells (hypertrophy). Mature cartilage cells (hypertrophic chondrocytes) secrete Ihh, a growth factor that induces expression of PTHrP, another growth factor, in immature proliferating chondrocytes. Since PTHrP in turn inhibits chondrocyte maturation, Ihh secretion limits the number of maturing chondrocytes through a negative feedback loop, striking a balance between proliferation and hypertrophy [Kronenberg, 2003]. Materials and methods: A gene network centering on the control of Ihh, PTHrP and transcription factors Sox9 and Runx2, which are the master regulators of early and late chondrocyte differentiation respectively, was manually constructed from literature. The dynamics of this network are simulated in a discrete framework that divides reactions into two speed classes. In this framework all interactions are considered additive, and each interaction is associated with a weight. Starting from the observation that the gene network must activate Runx2 in the presence of Ihh and Sox9 in the presence of Ihh and PTHrP, we investigate which edges are vital in achieving this. To this end, we employ both a heuristic and a genetic algorithm where the weights attached to the edges function as variables. In the heuristic algorithm weights are uniformly distributed in [0,1] and the means (based on 450 samples) of the weights that satisfy the above mentioned observations are contrasted with those that do not. If the difference of the means passes a certain threshold, the weight of the corresponding edge is fixed at 1. Results and discussion: Preliminary results from the heuristic algorithm show that fixing 14 weights (out of 147) is sufficient to match the biological observations in about 22% of cases, all other weights being selected randomly. The selected edges show that the BMP pathway is crucial in effecting a switch between hypertrophy in the absence of PTHrP and proliferation in its presence. This observation can be substantiated by earlier findings that BMP signalling plays a crucial role in prehypertrophic cells that are on the verge of hypertrophy [Yoon, 2006]. References: Kronenberg, 2003, Nature, 423:332-336; Yoon et al., 2006, Development, 133:4667-4678. [less ▲]

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See detailPrior light history impacts on higher order cognitive brain function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Meyer, Christelle ULg et al

Conference (2014, June 17)

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See detailThe circadian system sets the temporal organization of basic human neuronal function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Gaggioni, Giulia et al

Conference (2014, June 16)

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See detailMeasuring the body, measuring through the body
Vangeebergen, Thomas ULg

Conference (2014, June 13)

Body is a particular relevant way to tackle design processes, because of the multiplicity of status it can acquire during these processes: a source of information, a target to fit, a device to perform, a ... [more ▼]

Body is a particular relevant way to tackle design processes, because of the multiplicity of status it can acquire during these processes: a source of information, a target to fit, a device to perform, a complex technology, an apparatus for the users. A specific body is presented in this paper: the measured body. Trough racial anthropology, sport performances, demographic statistics, medical treatments, psycho-cognitive surveys, quantified self, or in many other contexts, human body is subject to a wide range of various measures. I would on my own propose some thoughts grounded on field exploration, concerning sensory analysis practices, in various laboratories. According to the symmetrical glaze STS have gave from the beginning to both human and non-humans, objects and subjects, the body is for a start itself one of the “stuffs” overlapping categories, blurring distinctions between things and persons, at the same a time a given and an object to perform. The measures of the body, and made with/through the body, highlight how it could be enacted, revealed, understood, improved by technology, especially when it requires some quantitative data. But it allows us also to grasp how the body is viewed simultaneously as a technological device and as the data origin, to intervene during complex practices (e.g. standardization, lab experiments, and marketing surveys). One of the numerous outcomes of such research could be the role of these bodily measurements in the definition of the actors, as well individuals than collectives. By the way it takes on a share on the network tying body to numerical data and to materiality-other-than-human, to measure the body/ through the body seems to afford socio-materiality in a particularly productive manner. Many scholars have inquired about numbers, how they could bring objectivity, how they produce confidence and security, and how finally they participate to black-box the measures themselves. Here, the aim is to understand the specificity of the body as measurement issue, being the interface of the-objects-to-be-measured and the instrument-of-measure. [less ▲]

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See detailThe Discretionary Use of Strasbourg Jurisprudence by the International Criminal Court
Deprez, Christophe ULg

Conference (2014, June 13)

Although the case law of the European Court of Human Rights ("ECtHR") has had and still shows critical influence on the development of the practice of the International Criminal Court ("ICC"), it remains ... [more ▼]

Although the case law of the European Court of Human Rights ("ECtHR") has had and still shows critical influence on the development of the practice of the International Criminal Court ("ICC"), it remains unclear what the authority of such external jurisprudence is vis-à-vis the international criminal judge. While it is virtually undisputed that human rights law, in general terms, is applicable to proceedings before the ICC, many scholars tend to adopt a much nuanced approach to the authority of human rights case law in particular. This paper aims to shed further light on the issue by addressing the question whether ICC judges have used Strasbourg jurisprudence in a consistent manner, in particular as regards the authority which they decided to vest the latter with. It demonstrates that ICC Chambers have relied on European human rights practice, alternatively, as a mere source of inspiration, as binding interpretation, as a corpus having ambivalent authority, or as a source whose legal value it simply left unspecified. This leads us to conclude that, on the whole, the ICC has been mostly inconsistent regarding the value of ECtHR case law in the context of international criminal proceedings. Such inconsistency, we argue, amounts to a discretionary use of Strasbourg jurisprudence that further reinforces the Court's paradoxical position as the ultimate authority for defining the boundaries of its own human rights constraint. [less ▲]

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See detailInternet : support, médium ou épimédium ?
Barnabé, Fanny ULg; Dozo, Björn-Olav ULg

Conference (2014, June 11)

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See detailLes remèdes d'origine égyptienne utilisés dans la médecine vétérinaire antique
Marganne, Marie-Hélène ULg

Conference (2014, June 10)

Recherche systématique des ingrédients d'origine égyptienne attestés dans les recettes des écrits vétérinaires grecs et latins, et comparaison de leur utilisation à celle de la médecine humaine, avec ... [more ▼]

Recherche systématique des ingrédients d'origine égyptienne attestés dans les recettes des écrits vétérinaires grecs et latins, et comparaison de leur utilisation à celle de la médecine humaine, avec évaluation de leur accessibilité et leur coût. [less ▲]

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See detailHigher Symmetries of the conformal Laplacian
Radoux, Fabian ULg

Conference (2014, June 09)

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See detailFe and Mg Isotope Fractionation in Olivine from the NWA 1068 Shergottite
Collinet, Max ULg; Charlier, Bernard ULg; Namur, Olivier et al

Conference (2014, June 09)

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See detailFast Ambient Pressure Thermal cycling of space solar arrays samples under equivalent AM0 illumination conditions
Guiot, Marc ULg; Fernandez Lisbona, Emilio; Witteveen, Bob et al

Conference (2014, June 08)

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See detailMuti-scale methods with strain-softening: damage-enhanced MFH for composite materials and computational homogenization for cellular materials with micro-buckling
Wu, Ling ULg; Nguyen, Van Dung ULg; Adam, Laurent et al

Conference (2014, June 06)

In this work, multi-scale methods with strain softening are developed in the contexts of damage modeling for composite laminates and of buckling analyses in cellular materials. First, an anisotropic ... [more ▼]

In this work, multi-scale methods with strain softening are developed in the contexts of damage modeling for composite laminates and of buckling analyses in cellular materials. First, an anisotropic gradient–enhanced continuum damage model is embedded in a mean–field homogenization (MFH) process for elasto-plastic composites. The homogenization procedure is based on the newly developed incremental secant mean-field homogenization formulation, for which the residual stress and strain states reached in the phases upon a fictitious elastic unloading are considered as starting point to apply the secant method. The mean stress fields in the phases are then computed using isotropic secant tensors, which are naturally used to define the Linear Comparison–Composite The resulting multi– scale model is then applied to study the damage process at the meso–scale of laminates, and in particular the damaging of plies in a composite stack. By using the gradient–enhanced continuum damage model, the problem of losing uniqueness upon strain softening is avoided. Second, an efficient multi–scale finite element framework capturing the buckling instabilities in cellular materials is developed. As a classical multi–scale computational homogenization scheme loses accuracy with the apparition of the macroscopic localizations resulting from the micro–buckling, the second order multi–scale computational homogenization scheme is considered. This second–order computational framework is enhanced with the following novelties so that it can be used for cellular materials. At the microscopic scale, the periodic boundary condition is used because of its efficiency. As the meshes generated from cellular materials exhibit a large void part on the boundaries and are not conforming in general, the classical enforcement based on the matching nodes cannot be applied. A new method based on the polynomial interpolation2 without the requirement of the matching mesh condition on opposite boundaries of the representative volume element (RVE) is developed. Next, in order to solve the underlying macroscopic Mindlin strain gradient continuum of this second–order scheme by the displacement–based finite element framework, the treatment of high order terms is based on the discontinuous Galerkin (DG) method to weakly impose the C1-continuity. Finally, as the instability phenomena are considered at both scales of the cellular materials, the path following technique is adopted to solve both the macroscopic and microscopic problems. [less ▲]

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See detailLes médiateurs scolaires en action : des discours aux pratiques
Dethier, Baptiste ULg

Conference (2014, June 05)

En 1993, dans un contexte marqué les questions d’insécurité, de violence scolaire, de crise de confiance envers les institutions ou encore de décrochage scolaire, 28 médiateurs sont engagés dans autant ... [more ▼]

En 1993, dans un contexte marqué les questions d’insécurité, de violence scolaire, de crise de confiance envers les institutions ou encore de décrochage scolaire, 28 médiateurs sont engagés dans autant d’établissements scolaires aux publics défavorisés de la région bruxelloise. Ce projet pilote, voyant le jour sous la houlette du Ministère de l’enseignement, ne sera institutionnalisé qu’en 1998 dans un décret créant le Service de Médiation Scolaire, divisé en deux entités : 56 médiateurs internes à Bruxelles et 30 médiateurs externes (répartis par zones couvrant plusieurs établissements) en Wallonie. Par ailleurs, d’autres niveaux de pouvoir (communes, diocèses, écoles) créaient également, localement, leurs propres fonctions de médiateur scolaire. Actuellement, on en dénombre environ 120 en Belgique francophone. Ce nouvel acteur, bien que peu étudié, incarnerait un nouveau mode de régulation sociale (Bonafé-Schmitt, 1996) remettant en question les équilibres historiques du système scolaire (Verhoeven, 1997). En effet, il se présente comme un tiers neutre et indépendant de l’établissement, permettant ainsi la création d’un espace où peuvent se résoudre différents problèmes concernant les personnes demandeuses, qu’elles soient élèves, membres du personnel scolaire ou encore parents. Dans un premier temps, notre attention se porte sur l’ensemble des acteurs portant le nom de médiateurs scolaires (Kuty et al., 2012). Au sein d’un cadre légal ne définissant que vaguement leur fonction, ces derniers sont néanmoins globalement chargés de prévenir la violence et le décrochage scolaires et de favoriser, conserver ou rétablir le climat de confiance entre élèves, écoles et familles. À partir de là, ils ont progressivement construit leurs propres pratiques et leur identité, cherchant par là à trouver et à consolider leur place au sein d’un milieu scolaire déjà marqué par la présence de multiples acteurs. Dans un second temps, des études de cas approfondies dans six établissements d’enseignement secondaire permettent de constater que les médiateurs ne disposaient pas du monopole de la médiation (Dubois et Dethier, 2013), concept polysémique auquel de nombreux acteurs se réfèrent pour qualifier certains aspects de leur travail quotidien. En outre, le recours à la médiation ou aux médiateurs ne se révèle être qu’une solution parmi d’autres pour faire face aux différents problèmes rencontrés par les acteurs : violence, décrochage, absentéisme, échec scolaire, conflits, problèmes socio-économiques… Ces constats exigent une étude empirique approfondie du travail concret réalisé par les médiateurs scolaires, une étude attentive à leurs discours mais aussi à l’observation de leurs pratiques et interactions directes avec les différents acteurs scolaires. Les résultats de cette étude font l’objet de cette communication. Cette contribution se base sur un corpus composé de onze entretiens individuels, trois focus groups et trois périodes d’observation non participante auprès de médiateurs belges francophones membres d’un même service. Ces derniers revendiquent une posture de tiers neutre et indépendant dans l’école, ainsi que des principes basés sur le non-jugement, la confidentialité, l’accueil inconditionnel de la demande ou encore la non-expertise. Il s’agira par conséquent de rendre compte de la manière dont ces médiateurs traduisent leurs discours en pratiques au quotidien. [less ▲]

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See detailMALDI Mass Spectrometry Imaging: a new tool to decipher the antibiome of Bacillus amyloliquefaciens
Debois, Delphine ULg; Jourdan, Emmanuel; Cawoy, Hélène et al

Conference (2014, June 05)

Soil Bacillus isolates may devote up to 8% of their genome to nonribosomal synthesis of lipopeptide (LP)- and polyketide (PK)-type antibiotics. LPs from surfactin, iturin and fengycin families are known ... [more ▼]

Soil Bacillus isolates may devote up to 8% of their genome to nonribosomal synthesis of lipopeptide (LP)- and polyketide (PK)-type antibiotics. LPs from surfactin, iturin and fengycin families are known to exert different actions on the wellness of the producing strain such as fungitoxicity (iturin, fengycin) or motility, root colonization and immune stimulating agent (surfactin). Nevertheless, few is reported about the actual antibiome secreted in situ by Bacillus cells during confrontation with phytopathogens or plant root colonization. We developed a method mimicking the conditions prevailing in the rhizosphere and, taking advantage of the versatility of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging, we were able to localize and identify antibiotics produced in situ by bacterial cells. First, we applied this new methodology to bioassays in which Bacillus amyloliquefaciens 98S were grown together with Fusarium oxysporum, with the aim of deciphering the role of the different LP families during the phytopathogen growth inhibition. Our results showed that the three LP families were readily produced in different proportions. Especially, images of surfactins, iturins and fengycins demonstrated that iturins are the antibiotic family actually involved in the antagonism against Fusarium oxysporum. In a second approach, we used a “in planta” model in which Bacillus amyloliquefaciens S499 was simultaneously grown with Tomato and Arabidopsis thaliana roots. Imaging results, obtained during a time course analysis, showed that surfactin is always the major lipopeptide detected. In further experiments involving a refined time-window, we observed that surfactin is actually produced as soon as 24h post inoculation. These results were the starting point of a wider study showing that the early accumulation of surfactin is a complex phenomenon involving, among other mechanisms, cell-well components recognition by bacteria, and that this interaction is a win-win association for both plant and bacterial cells. [less ▲]

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See detailBiorefine: Recovery of nutrients and metallic trace elements from different wastes by chemical and biochemical processes
Tarayre, Cédric ULg; Fischer, Christophe ULg; De Clercq, Lies et al

Conference (2014, June 05)

At present, most waste processing operations are not oriented towards the valorization of valuable reusable components such as nitrogen, phosphorus, potassium and even Metallic Trace Elements (MTEs ... [more ▼]

At present, most waste processing operations are not oriented towards the valorization of valuable reusable components such as nitrogen, phosphorus, potassium and even Metallic Trace Elements (MTEs). Currently, sewage sludge, for example is usually used as a fertilizer in agriculture, in energy production or in the field of construction. Ashes originating from sludge incineration contain heavy metals and minerals in large quantities. Manure is mainly used in agriculture, although considerable amounts of nutrients are lost and cause pollution. Digestate is also used in agriculture, but other alternatives have been proposed, such as the energetic valorization. Better valorization of these wastes in agriculture (or other sectors) is however largely constrained by a multitude of legal requirements. An important problematic point is the concentration in MTEs that is found in those wastes. Consequently, recovery of nutrients and MTEsmay be a key solution for optimal valorization of wastes. Many unit operations used in the field of chemical and biochemical engineering (mechanical operations on fluids, solids, mass and heat transfers, chemical reactions, etc.) could be used in order to achieve an efficient recovery yield of nutrients and trace elements. The aim of the BioRefine Project is to make an inventory of all recovery techniques of nutrients and MTEs in five countries: Belgium, France, Germany, United Kingdom and The Netherlands. Pilot plants will also be tested to assess the efficiency of new treatment techniques after which the most efficient processes will be chosen to be applied on a larger scale. In addition, the collected data will be used to propose exploitation scenarios taking into account legal constraints and optimized logistics.This work is supported through an INTERREG IVB NWE programme(ref. 320J-BIOREFINE). [less ▲]

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See detailLo stato di necessità, invenzione moderna o romana?
Gerkens, Jean-François ULg

Conference (2014, June 04)

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See detailApproche socio-écologique: arrangements de la complexité
Absil, Gaëtan ULg

Conference (2014, June 04)

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See detailL'épaule un carrefour complexe
WANG, François-Charles ULg; LOZZA, Alessandro

Conference (2014, June 04)

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See detailElectrical characterization of pGeSn/nGe diodes
Baert, Bruno ULg; Gupta, Somya; Gencarelli, Federica et al

Conference (2014, June 03)

I-V characteristics of pGeSn/nGe diodes have been measured and show very good properties. Simulations of the same structure are able to reproduce most of the observed behavior and point to the ... [more ▼]

I-V characteristics of pGeSn/nGe diodes have been measured and show very good properties. Simulations of the same structure are able to reproduce most of the observed behavior and point to the predominating influence of parameters such as the band gap energy of the GeSn layer. C-V characteristics showing little frequency dependence have also been measured, and their analysis for the determination of the carrier concentration is confirmed by simulations. More investigations, including the effect of temperature and other defects at the interface or in the bulk of either layers are still required in order to explain some of the observed behaviors, notably the reverse saturation current. [less ▲]

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See detailUn chiffre en débat. Controverse autour de la dette wallonne
Piron, Damien ULg

Conference (2014, June 03)

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See detailThe role of segmentation and investor recognition through the lens of cross-listing activity
Mouchette, Xavier ULg; Carrieri, Francesca; Muller, Aline ULg

Conference (2014, June)

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See detailRepresentations of Incident Reporting as a Collective Learning Process
Rossignol, Nicolas ULg; Turcanu, Catrinel

Conference (2014, June)

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these ... [more ▼]

In the context of vulnerability analysis, it is now widely aknowledged that social factors should be taken into account, alongside technical ones. Depending on the particular approach adopted, these social factors are considered to influence “coping capacities”, “adaptive capacities” or “resilience”. The ability of a socio-technical system to learn from past incidents and accidents seems to have a positive influence on its vulnerability, as it increases its capacity to adapt properly in case of future unwanted envents. To that regard, incident reporting systems are of first importance as they are supposed to constitute a collective memory of past incidents, to initiate a collective share of information and to foster collective learning and adapations. Yet, the theoretical assumptions about the ability of a reporting system to imply collective learning have still to be demonstrated. This paper proposes a methodology addressing this issue. To do so, we conduct a number of semi-structured interviews in a nuclear facility with various types of actors (managers, lab responsibles, technical workers), and in different risk contexts. In addition, participants are requested to produce a mental map of the reporting system they are concerned with. These inputs are then analyzed following a “cross-case analysis” procedure in order to identify patterns of actors' representations of the reporting system, and to link these patterns to potential learning processes fostered by the system. This constitutes the first step of an inductive research process aiming to identify and characterize the link between reporting systems and collective learning. In the next steps, the link between the identified patterns of representations and collective learning processes will be tested quantitatively. The final aim being to elaborate ways to improve Incident Reporting Systems to improve collective learning. [less ▲]

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See detailThe X-ray properties of lambda Cep, a true twin of zeta Pup?
Rauw, Grégor ULg; Nazé, Yaël ULg; Gonzalez-Perez, Nicolas et al

Conference (2014, June)

Oef stars are O-stars that display a double-peaked He II λ 4686 line in their optical spectra, suggesting that the inner part of the stellar wind is co-rotating with the star. This hypothesis is also ... [more ▼]

Oef stars are O-stars that display a double-peaked He II λ 4686 line in their optical spectra, suggesting that the inner part of the stellar wind is co-rotating with the star. This hypothesis is also often used to explain their ubiquitous spectral variability in the optical domain. In this context, the fact that the high-resolution X-ray spectra of ζ Pup (O4Ief) meet the expectations of the wind-embedded shock model, assuming a spherically symmetric wind came as a surprise. To understand what is going on, we have obtained a 300 ksec observation of λ Cephei, the second brightest Oef star. This observation not only allows to collect the RGS high-resolution spectrum of the star, but further enables us to search for X-ray variability. To correlate the potential X-ray variability with that of the optical spectrum of λ Cep, we monitored the optical spectrum simultaneously with the TIGRE telescope. We present here the first results of this campaign, both in terms of the line profiles in the RGS spectrum and the search for X-ray variability in correlation with the optical variations. [less ▲]

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See detailL’effet d’un dispositif public d’accompagnement et de formation belge sur les trajectoires professionnelles des demandeurs d’emploi
Gérard, Julie ULg

Conference (2014, June)

: Suite aux récents bouleversements économiques et sociaux touchant les pays de l’Union Européenne, de nombreux partenariats entre services publics d’emploi et agences d’emploi privées se sont développés ... [more ▼]

: Suite aux récents bouleversements économiques et sociaux touchant les pays de l’Union Européenne, de nombreux partenariats entre services publics d’emploi et agences d’emploi privées se sont développés et complexifiés, suivant une logique de gestion mixte du marché de l’emploi. Cette communication porte sur l’étude d’un partenariat public-privé entre un service public régional belge et un organisme de formation. À partir des apports conceptuels et théoriques de la sociologie de l’action publique et de la littérature propre aux agences d’emploi privées et aux partenariats public-privé, nous analyserons la capacité d’un dispositif public à assurer la remise à l’emploi de son public-cible. Pour ce faire, nous étudierons son rôle et ses effets sur les trajectoires professionnelles des demandeurs d’emploi y recourant. [less ▲]

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See detailCrime Hotspots In Belgium: Spatial He terogeneity In The Multivariate Regression Model?
Trotta, Marie ULg

Conference (2014, June)

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime ... [more ▼]

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime concentration-urban backcloth relationship, with the drawback of focusing on a single city. However, the urban backcloth is also shaped by the inter-cities and city-hinterland relationships. Our objective is to model the concentration of sexual offences for entire Belgium, at the very precise scale of the statistical sector in order to take into account the role of the urban hierarchy. Methods: We analyse the ViCLAS data for Belgium between 2004 and 2011. Specifically, we study the relationship between the concentration of initial contact scenes and socio-economic characteristics and facilities of the statistical sector, using two spatial models. First, we computed a spatial lag zero-inflated model (ZINB) in order to evaluate the global predictive capacities of the model. Then, a Poisson geographically-weighted regression (GWR) was run to study the spatial heterogeneity for each of the explanatory variables. Results: The zero-inflated negative binomial model with spatial lag recovers the neighbourhood environmental quality, the concentration of economic and cultural activities, and drinking places as major significant factors (Mc Fadden’s pseudo-r² of 0.2). The Poisson geographically-weighted regression underestimates the crime concentrations but highlights the spatial heterogeneity [less ▲]

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See detailGenetic diversity, structure and parentage analysis within several European apple germplasm collections assessed by microsatellite markers
Durel, Charles-Eric; Denancé, Caroline; Ravon, Elisa et al

Conference (2014, June)

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See detailFigures du critique-écrivain, formes et pratiques du discours métalittéraire: Introduction et conclusions
Stienon, Valérie ULg; Van Nuijs, Laurence

Conference (2014, June)

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » ... [more ▼]

Du XIXe siècle à nos jours, de nombreux écrivains ont combiné écriture de création et critique littéraire. À ces pratiques mêlées correspondent des statuts hybrides, dont celui de « critique-écrivain » est peut-être le plus représentatif. Ce colloque se propose d’interroger cette figure bifide, en prenant en considération les divers paramètres de la critique littéraire en tant que pratique protéiforme, depuis l’institutionnalisation de la critique au XIXe siècle (critique journalistique, critique des écrivains et critique universitaire) jusqu’à la diversification moderne des types de discours critique (théorique, historique, médiatique, essayiste, romanesque). Comment les rapports entre critique et création sont-ils imaginés, confirmés voire inversés par les écrivains ? Par rapport à quels modèles et repoussoirs les écrivains se définissent-ils en critiques ou en créateurs (ceux, par exemple, du théoricien, de l’essayiste, du chroniqueur, du sociologue ou encore du polémiste) ? Pourquoi la postérité a-t-elle retenu comme critiques des auteurs qui ont par ailleurs investi ou approché une production spécifiquement littéraire ? Et comment ces rapports se renégocient-ils tout au long de l’histoire de la critique ? [less ▲]

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See detailESTUDIO ANTE Y POST-MORTEM DE LAS CARACTERÍSTICAS FISIOPATOLÓGICAS DEL TRACTO GENITAL Y SUS FACTORES DE RIESGO EN VACAS LECHERAS EN EL SUR DE VIETNAM
Nguyen, Kien Cuong; Tomas Mulet, Cristina; Okouyi-Mfoumou, Marcel et al

Conference (2014, June)

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See detailLe ciel étoilé d’Isis et d’Héphaïstos à Memphis
Veymiers, Richard ULg

Conference (2014, June)

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See detailPhilosophy of economic security of organization: The constructivist approach
Shutyak, Yuliya ULg

Conference (2014, June)

The purpose of this paper is to present the concept of economic security of the organization. Guiding by the constructivism approach, the author conducts a narrative literature review on economic security ... [more ▼]

The purpose of this paper is to present the concept of economic security of the organization. Guiding by the constructivism approach, the author conducts a narrative literature review on economic security of organization in parallel with well-known theories of business management.The presented in the paper ideas are an impulse for a new wave in organizational research basing on a new globalizing theoretical framework. The proposed approach to organizational management through the prism of security allows connecting disjoined concepts used in organizational studies and highlights aspects important for organizational survival and growth but mostly overlooked by scientists. The paper’s value consists in evolving of a relatively unexploited concept of economic security of the organization. [less ▲]

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See detailL’effet des dispositifs d’intermédiation sur les trajectoires professionnelles des travailleurs. Le cas d’un bureau de recrutement, recherche et sélection de personnel.
Gérard, Julie ULg

Conference (2014, June)

Au cours de ces dernières années, le souci d’allier flexibilité et sécurité au travail a conduit à l’essor considérable des métiers de l’intermédiation (Orianne et Maroy, 2008). En particulier dans le ... [more ▼]

Au cours de ces dernières années, le souci d’allier flexibilité et sécurité au travail a conduit à l’essor considérable des métiers de l’intermédiation (Orianne et Maroy, 2008). En particulier dans le domaine de l’accompagnement et du développement de carrière, divers dispositifs privés d’aide et de suivi ont vu le jour afin de contribuer à l’amélioration des conditions de travail et d’assister les travailleurs dans leurs transitions professionnelles. Par leur action, ces nouveaux dispositifs n’hésitent pas à complexifier les temporalités sociales en créant de nouvelles opportunités d’emploi et en redéfinissant les rythmes de carrière. À l’aide d’une étude de cas dans le secteur du recrutement belge, nous analyserons la capacité d’un processus de mise en emploi à remplir de tels objectifs dans un contexte de gestion mixte du marché du travail. Approchée d’une manière qualitative (entretiens semi-directifs et observations), nous étudierons l’apport de cette agence de placement au travers d’un cadre théorique qui intègre les concepts de dispositif (Foucault, 1977 ; Peeters et Charlier, 1999 ; Raffnsoe, 2008) et de réseaux sociaux (Grossetti 2005, 2008 et 2011). Nous montrerons qu’un plus de régir l’offre et la demande de travail, ce dispositif d’intermédiation, par son système de cooptation et son accompagnement de carrière, assure la fluidification du marché et sécurise la dynamique des transitions professionnelles. [less ▲]

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See detailAnalyse du métier de facilitateur et de son rôle dans la diffusion de normes d’emploi : le cas d’un bureau de chômage belge
Orianne, Jean-François ULg; Beuker, Laura ULg

Conference (2014, June)

En 2004, suite aux injonctions européennes en matière d’activation impulsées par les lignes directrices de 2003-2005, la Belgique met en place le PAC (ou Plan d’Accompagnement des chômeurs). Cette ... [more ▼]

En 2004, suite aux injonctions européennes en matière d’activation impulsées par les lignes directrices de 2003-2005, la Belgique met en place le PAC (ou Plan d’Accompagnement des chômeurs). Cette importante réforme prévoit – notamment – la mise en place de la procédure d’activation du comportement de recherche d’emploi par l’Office National de l’Emploi (Ou l’ONEm). Désormais, des agents sont spécifiquement dédiés à l’évaluation des efforts menés par les demandeurs d’emploi (ou DE) pour s’insérer sur le marché du travail : ce sont les facilitateurs. Si la procédure d’évaluation est officiellement définie, la décision, quant à elle, est bel et bien fonction de l’agent, qui doit interpréter le cadre réglementaire général à l’aune de la situation singulière du demandeur d’emploi. À l’aide d’une étude de cas réalisée au sein d’un bureau de chômage situé en Belgique francophone, nous allons tenter d’ouvrir la « boîte noire » du jugement des facilitateurs. À partir d’une approche qualitative cumulant des entretiens semi-directifs et de l’observation d’interactions entre facilitateurs et demandeurs d’emploi, nous montrerons que la décision des facilitateurs n’est ni arbitraire, ni déterminée. Elle est, au contraire, le fruit de la mobilisation d’une multitude d’appuis conventionnels dans l’action (Dodier, 1993). En outre, dans la lignée des travaux de Benarrosh (2000 ; 2006 ; 2012) nous démontrerons que ces agents sont des « pourvoyeurs » de normes institutionnelles précises à destination des demandeurs d’emploi. [less ▲]

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See detailModeling of the Iturinic Antimicrobial Lipopeptide Mycosubtilin at Interfaces
Loison, Claire; Nasir, Mehmet Nail ULg; Benichou, Emmanuel et al

Conference (2014, June)

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See detailThe role of segmentation and investor recognition through the lens of cross‐listing activity
Mouchette, Xavier ULg; Muller, Aline ULg; Carrieri, Francesca

Conference (2014, June)

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See detailThe role of segmentation and investor recognition through the lens of cross-listing activity
Mouchette, Xavier ULg; Muller, Aline ULg; Carrieri, Francesca

Conference (2014, June)

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See detailEstimated Subglottic Pressure Evaluation According to Vocal Pathology. Study on 418 Patients
Morsomme, Dominique ULg; Chareix, Hélène; FINCK, Camille ULg et al

Conference (2014, May 31)

Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort and can guide the therapist in his clinical approach. We aim ... [more ▼]

Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort and can guide the therapist in his clinical approach. We aim to examine the clinical interest of the ESGP by observing its values according to voice pathology, age, gender and sound pressure level. We also examine the relationships between PSGE, DSI and VHI. Method:The study includes 418 patients (M:118/W:300). Each patient’s file consists of VLS, acoustic, aerodynamic and perceptual measures. The ESGP was collected through the Phonatory Aerodynamic System Model 6600 (KayPentax). Patients produced 3 sequences of / ipipi / at low (IL), conversational (IC) and high (IH) intensity. Patients were grouped according to the ENT’s diagnosis. Results: Patients without vocal lesions (MTD) had a significantly lower ESGP compared to patients with nodules, polyps, inflammation, edema (IL, IC), cysts (IC) or scar (IC). Patients with vocal fold atrophy had a lower ESGP than those suffering from nodules and polyps at conversational and high intensity, but were not differentiated at low intensity. Amongst patients without lesions (MTD), a positive correlation appeared between ESGP and intensity; which was not the case for patients with lesions. At high intensity, men had a significantly higher ESGP than women. At low intensity, we noted a positive correlation between the VHI scores and ESGP levels. At low and conversational intensity, we observed a negative correlation between DSI and ESGP scores. Conclusion: This study highlights the importance of considering ESGP in the vocal profile. As expected, patients with vocal pathology produce high ESGP. However, the correlations between intensity and ESGP vary depending on the patient's pathology. In addition, ESPG values allow the clinician to distinguish MTD and healthy patients and thus could help the therapist in his clinical approach. [less ▲]

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See detailNumerical Investigation of Continuous Fiber Glass Drawing Process
Chouffart, Quentin ULg; Simon, Philippe; Terrapon, Vincent ULg

Conference (2014, May 30)

The manufacturing process of glass fibers used for the reinforcement of composite material consists in drawing a glass melt at high temperature through the bushing plate into fibers using a winder. This ... [more ▼]

The manufacturing process of glass fibers used for the reinforcement of composite material consists in drawing a glass melt at high temperature through the bushing plate into fibers using a winder. This process is sensitive to numerous disturbances that can cause the fiber to break during the drawing process. In order to understand the origin of these failures and improve the process efficiency, it is important to understand the physics of the forming fiber. We investigate here the underlying physics of the forming of a single fiber through numerical simulations. In particular, we focus on the region from the hole tips at the bushing plate to the glass transition point. The influence of key parameters (e.g. operating windows, and heat transfers mechanisms) on the fiber radius attenuation and the internal stresses is investigated through a sensitivity analysis. In addition, the impact of the temperature variations at the bushing plate is investigated. Finally, we show how the forming stress is influenced by these parameters. It is found that the internal stress can be minimizing by varying the operating windows. On the other hand, results also demonstrate that the heat pattern of the bushing plate is one of the most important causes for disturbance in the process. [less ▲]

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See detailBoard attributes and conditional conservatism: Evidence from French firms
Boussaid, Nabila ULg; Sougné, Danielle ULg; Hamza, Taher

Conference (2014, May 30)

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See detailDesign of a sprayer that makes CE-ESI-MS easy and robust
Far, Johann ULg; De Pauw, Edwin ULg; Falmagne, Jean-Bernard et al

Conference (2014, May 28)

Presentation of a CEMS interface design for easy and robust coupling of Capillary Electrophoresis with Mass Spectrometry equipped with a nanospray source. Principles and specification were presented.

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See detailRegulation in Practice: Choice among regulatory Tools
Bougnouch, Mehdi ULg; Gautier, Axel ULg

Conference (2014, May 28)

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See detailDesign of a spherical array of microphones for room acoustics applications.
Feron, Hermine; Embrechts, Jean-Jacques ULg

Conference (2014, May 28)

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See detailDe l'analyse des pratiques discursives aux modalités de conception
Joachim, Guillaume ULg; Roosen, Marie ULg; Dondero, Maria Giulia ULg

Conference (2014, May 27)

Cette communication aborde l’étude des interactions entre architectes exploitant différentes ressources (parole, dessin, geste) dans leur pratique professionnelle collaborative de conception. Elle portera ... [more ▼]

Cette communication aborde l’étude des interactions entre architectes exploitant différentes ressources (parole, dessin, geste) dans leur pratique professionnelle collaborative de conception. Elle portera sur des questions méthodologiques, en s’attachant à décrire les apports possibles de travaux de linguistique appliquée à l’analyse de la communication multimodale en architecture. La communication dans les processus de conception est fréquemment abordée à partir de représentations graphiques en tant que procédés de production ou de transmission de connaissances. En effet, c’est en grande partie par le dessin qu’un concepteur donne forme à l’objet qu’il étudie, qu’il le communique à autrui et avant tout qu’il se le représente à lui-même. S’il est avéré que les professionnels de l’architecture utilisent diverses figures comme outils pour représenter et transmettre graphiquement un objet encore inexistant, le champ théorique de la discipline possède par contre peu d’outils méthodologiques permettant de témoigner ou d’analyser minutieusement in vivo la dimension heuristique des échanges entre concepteurs mobilisant plusieurs modalités de communication simultanées. Or, les travaux empiriques de Charles Goodwin (UCLA) inspirés de l’ethnométhodologie et de Lorenza Mondada (UNI Basel) issus de la linguistique appliquée, se sont attachés à l’étude de situations discursives multimodales et ont développé des méthodes découlant de l’analyse conversationnelle. Ces deux approches transdisciplinaires présentent notamment la possibilité aux chercheurs d’analyser à différents niveaux l’articulation de représentations graphiques, gestuelles et verbales et d’identifier la fonction des différentes modalités dans la construction collective du sens et dans l’élaboration d’objets de connaissance propres à une discipline. Nous questionnerons l'intérêt de ces transferts et emprunts d’outils méthodologiques sur l’étude des interactions entre architectes : comment nous aident-ils potentiellement à cerner les procédés par lesquels ces acteurs co-élaborent des objets de savoir utiles pour leur activité ? Quelles contributions inédites produisent-ils pour approcher la cognition dans les processus de conception ? Cette étude expérimentale et réflexive sera enfin l’occasion de décrire brièvement les limites d’une translation des outils de l’analyse interactionnelle située sur l’appréhension des pratiques professionnelles de conception architecturale. [less ▲]

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See detailPréférences résidentielles et production du logement en banlieue périurbaine
Halleux, Jean-Marie ULg; Strée, Julie

Conference (2014, May 27)

La communication traitera des relations entre les mécanismes de la production immobilière et les préférences résidentielles. Elle visera à vérifier l’hypothèse selon laquelle nous assistons à l’émergence ... [more ▼]

La communication traitera des relations entre les mécanismes de la production immobilière et les préférences résidentielles. Elle visera à vérifier l’hypothèse selon laquelle nous assistons à l’émergence et au renforcement de préférences susceptibles de remettre en cause le modèle périurbain du pavillon périphérique. Notre propos s’inscrit donc dans la réflexion sur le futur des zones périurbaines (Grant et al., 2013). Notre recherche a consisté dans la réalisation et l’analyse d’une enquête menée au sein de la zone métropolitaine de Bruxelles, auprès de ménages habitant un logement neuf (Strée et Halleux, 2013). Les ménages ont été interrogés sur leurs préférences résidentielles ainsi que sur leurs propensions à payer pour différents types de produits immobiliers. Son échantillon est constitué de 120 ménages ayant été interrogés en face à face à leur domicile. L’échantillon a été stratifié en fonction de deux critères : la localisation au sein de la zone métropolitaine et le type de logements. Concernant la localisation, des enquêtes ont été menées à Wavre (commune située à une demi-heure voiture du centre de Bruxelles) et en plus lointaine périphérie, à Perwez et Chastre (communes situées à une heure voiture du centre de Bruxelles). Concernant les types de logement, la stratification s’est opérée de la manière suivante : 40 % des ménages résident dans une habitation quatre façades, 30 % dans une habitation mitoyenne et 30 % dans un appartement. Un premier résultat de notre enquête est de confirmer la prégnance du modèle de la maison unifamiliale isolée (quatre façades), qui représente le logement idéal pour 69 % de l’échantillon (y compris par 70 % des ménages résidant dans une habitation mitoyenne et par 57 % des ménages résidant en appartement). Pour autant, en comparaison d’enquêtes précédentes, les propensions à payer témoignent d’une bonne acceptation des produits immobiliers alternatifs. Sur base d’enquêtes précédentes réalisées dans le périurbain de Liège, nous nous attendions à une moins-value de 15 à 20 % entre le produit de la maison isolée et le produit de la maison jointive. Or, la différence observée est ici inférieure à 10 %. Cette situation est à relier à la problématique de la disponibilité en zones constructibles (Halleux et Strée, 2012). En effet, le bassin d’emploi bruxellois se caractérisant par une faible disponibilité foncière, cela conduit à banaliser la promotion commerciale de logements jointifs. Au sein de ces territoires, les ménages auraient donc bien intégré ce type de développements. Au sein d’autres territoires aux marchés fonciers moins tendus, nous aurions probablement observé des consentements à payer plus élevés pour la maison isolée, consentements qui auraient alors pu être interprétés comme un signe de stigmatisation vis-à-vis du logement jointif. Au final, nous mettons en avant un effet systémique où, par son impact sur la multiplication des projets de maisons mitoyennes, la rareté de l’offre foncière conduit à renforcer l’acceptation de la demande pour ce type de produits immobiliers. Parmi les autres résultats de notre enquête, soulignons la forte valorisation de la maison de 100 m2 qui, en comparaison d’appartements de la même superficie, est valorisée à un niveau moyen 13 % supérieur. Il existe donc un potentiel commercial important pour la petite maison. Cela représente à la fois une menace pour la consommation d’espace et une opportunité pour la densification douce. Il ressort également de nos enquêtes qu’une localisation intra-urbaine (dans un quartier « ancien ») est fortement dévalorisée. Pour autant, un signal encourageant tient ici à la relation entre l’âge du répondant et cette dévalorisation : les effectifs de moins de 40 ans dévalorisent moins les quartiers densément bâti que les populations plus âgées. Il s’agit là d’un résultat qui s’inscrit dans l’hypothèse de Grant et al. (2013) quant au renforcement de la demande pour des localisations plus urbaines et plus centrales. [less ▲]

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See detailDevelopment of the Abilities to Acquire New Orthographic Representations from Grades 2 to 6
Binamé, Florence ULg; Poncelet, Martine ULg

Conference (2014, May 27)

Unlike English, little attention has been accorded to orthographic learning in French which has a challenging spelling due to its high level of inconsistency. There is evidence that the mastery of ... [more ▼]

Unlike English, little attention has been accorded to orthographic learning in French which has a challenging spelling due to its high level of inconsistency. There is evidence that the mastery of alphabetic decoding is critical to acquire word-specific orthographic representations (Share 1995). It is also generally admitted that orthographic processing skills are involved in orthographic learning beyond the core phonological component. Even if these skills still remain underspecified, research particularly focuses on the sensitivity to orthographic constraints. While Pacton et al. (2013) have shown that graphotactic knowledge influences the learning of new spellings, little is known about the development of this knowledge over time. Our aim was to determine the developmental trajectory of orthographic word form acquisition abilities within the French orthography by assessing the speed of acquisition of new orthographic forms as well as the sensitivity to orthographic regularities. Five groups of forty French-speaking children from grades 2 to 6 took part in the study. We proposed two experimental tasks. The first consisted of an orthographic learning of 10 new orthographic forms (inconsistent in spelling) by using a repeated spelling paradigm. In practice, children were firstly asked to read aloud each item once. Then, the experimenter dictated each item ten times in a mixed order. The capacity of retention of the new representations was assessed one week later with a dictation task. The second task aimed at determining the sensitivity to different French orthographic regularities by means of an orthographic choice task containing 62 pairs of non-words homophones. Moreover, general reading and spelling abilities were also assessed. Results show that the speed of orthographic learning and the capacity of long-term retention significantly increase during the first years but do not differ anymore between grades 4-5 and 5-6, suggesting that older children have reached a nearly maximal potential in their learning capacities. Nevertheless, the general orthographic abilities, which are more dependent on scholar knowledge, continue to develop significantly during school years. Furthermore, sensitivity to orthographic regularities increases significantly only from grade 2 to 3, indicating that children as soon as 9 years-old are already able to extract different graphotactic patterns of their writing system. Pacton, S., Sobaco, A., Fayol, M., & Treiman, R. (2013). How does graphotactic knowledge influence children’s learning of new spellings? Frontiers in Psychology, 4, 1-10. Share, D. (1995). Phonological recoding and self-teaching: sine qua non of reading acquisition. Cognition 55, 151-218. [less ▲]

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See detailDomain generality of serial order processing in short-term memory: Evidence from musical and verbal domains
Gorin, Simon ULg; Majerus, Steve ULg

Conference (2014, May 27)

Recent models of verbal short-term memory (STM) propose a distinction between item storage processes, which are viewed as domain-specific, and order storage processes, which are considered by some authors ... [more ▼]

Recent models of verbal short-term memory (STM) propose a distinction between item storage processes, which are viewed as domain-specific, and order storage processes, which are considered by some authors to be domain-general, at least as regards verbal and visual STM domains. Here we provide further evidence for domain-specific item STM processes and domain-general order STM processes by comparing item and order processing in verbal and musical STM domains. The musical domain is particularly relevant here given its reliance on different kinds of sequential processes (e.g., tones successions, rhythm). Using an interindividual differences approach, we administered to a group of young healthy adults different tasks requiring retention of item identity for words or tones, and tasks requiring retention of serial order information for word sequences or note sequences, as well as a task measuring retention abilities for rhythmic information. For the item STM tasks, we observed strong intercorrelations for within-domain WM measures, but not between-domain WM measures, after controlling for general WM abilities. For the serial order STM tasks, we observed a specific association with the rhythm STM task. These results highlight the importance of temporal sequential processes, as measured by the rhythm STM task, as a driving factor of domain-general STM processes in verbal and musical domains. They furthermore confirm the domain-specificity of item STM processes. [less ▲]

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See detailTECTONIQUE ACTIVE ET EVOLUTION DU RELIEF STRUCTURAL DE L’AURES SEPTENTRIONAL
Benabbas, Chaouki; Draidia, Salah ULg; GRECU, Florina

Conference (2014, May 26)

La masse sédimentaire de l’Aurès septentrional (Atlas saharien oriental) a une épaisseur qui dépasse 7000 mètres. Cette masse imposante présente une série à peu près concordante du Jurassique supérieur à ... [more ▼]

La masse sédimentaire de l’Aurès septentrional (Atlas saharien oriental) a une épaisseur qui dépasse 7000 mètres. Cette masse imposante présente une série à peu près concordante du Jurassique supérieur à l’Eocène moyen, par des alternances de roches cohérentes : de calcaires et dolomies du Portlandien et du Berriasien, calcaires, grès et dolomies de l’Hauterivien, grès du Barrémien, dolomies de l’Aptien, grès de l’Albien, calcaires du Cénomanien, du Turonien, du Maastrichtien et de l’Eocène et des roches meubles; marnes cénomaniennes, santoniennes, campaniennes et éocènes. Ces alternances favorisent le développement d’un relief structural par érosion différentielle. La majorité des éléments de ce relief structural sont conformes à la structure tels que les chaînons et les dépressions orientés NE- SW et qui correspondent à des anticlinaux et des synclinaux pluri kilométriques de direction N 60° E. Par ailleurs, cette diversité est liée aussi à la complexité de l’histoire géologique (héritage morpho structural) d’une part et une évolution Plio Quaternaire très active, caractérisée essentiellement par des mouvements verticaux d’autre part. En fait, le contexte géodynamique en général et la tectonique active en particulier semble jouer un rôle essentiel dans la mise en place de ce relief structural ainsi que son évolution. Cette étude se donne comme objectifs, l’identification et la caractérisation des morpho structures qui favorisent l’évolution et le démembrement de ce relief, jeune et vigoureux. [less ▲]

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See detailEstimating Antarctic ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR
Agosta, Cécile ULg; Fettweis, Xavier ULg; Gallée, Hubert

Conference (2014, May 26)

The Antarctic ice-sheet surface mass balance (SMB) is a significant contribution to sea level changes which may mitigate the rise in sea level in a warmer climate, but this term is still poorly known. The ... [more ▼]

The Antarctic ice-sheet surface mass balance (SMB) is a significant contribution to sea level changes which may mitigate the rise in sea level in a warmer climate, but this term is still poorly known. The Antarctic SMB cannot be directly deduced from global climate models (GCMs) because of their too low resolution (~100 km) and their unadapted physic over cold and snow-covered areas. That is why the use of a regional climate models (RCM) specifically developed for polar regions is particularly relevant. We present here new estimations of the Antarctic SMB changes for the 20th and the 21st century at 40 km of resolution with the MAR (Modèle Atmosphérique Régional) RCM. Recent studies showed that large scale forcing from GCMs was the main source of uncertainty for RCM-deduced SMB, thus we first present a carefully analysis of the CMIP5 GCMs (used in the AR5 IPCC report) compared to the ERA-Interim reanalysis over the Antarctic region, from which we could select the less biased large scale forcing for MAR. We thus show the Antarctic SMB evolution as modeled with MAR forced by ACCESS1-3 for RCP 4.5 and 8.5 greenhouse gaz scenarios. We evaluate our outputs by comparing MAR forced by ACCESS1-3 and ERA-Interim for the 1980-2000 period to more than 2700 quality-controlled observations and to surface meteorological data from the READER database. We then give SMB changes estimations for the 21st century together with an analysis of uncertainties coming from the MAR model, the GCM forcing and the greenhouse gaz scenarios. [less ▲]

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See detailIn search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase
Bettendorff, Lucien ULg; Lakaye, Bernard ULg; Kohn, Grégory ULg et al

Conference (2014, May 25)

In search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase L. BETTENDORFF, B. LAKAYE, G. KOHN AND P. WINS GIGA-Neurosciences, University of Liège, 4000-Liège ... [more ▼]

In search of a physiological role for thiamine triphosphate and the 25-kDa thiamine triphosphatase L. BETTENDORFF, B. LAKAYE, G. KOHN AND P. WINS GIGA-Neurosciences, University of Liège, 4000-Liège, Belgium Thiamine triphosphate (ThTP) was discovered over 60 years ago. Although it is present in most organisms from bacteria to mammals, its possible biological functions remain unclear. In contrast to thiamine diphosphate (ThDP), it is not a coenzyme. In E. coli cells, ThTP is transiently produced in response to amino acid starvation, while in mammalian cells, it is constitutively produced at a low rate. In some animal tissues, ThTP was able to phosphorylate proteins and activate a high-conductance anion channel in vitro. These observations raised the possibility of ThTP being part of a still uncharacterized cellular signaling pathway. Though it was long thought that ThTP is synthesized by a specific ThDP:ATP phosphotransferase, more recent studies indicate that two main mechanisms are involved: (1) in the cytosol adenylate kinase 1 can catalyze ThTP production from ThDP and ADP and (2) in brain mitochondria FoF1-ATP synthase can catalyze ThTP production from ThDP + Pi. The latter reaction is energized by the respiratory chain through a chemiosmotic mechanism analogous to oxidative phosphorylation. Both mechanisms are conserved from bacteria to mammals. While ThTP synthesis does not seem to require a specific enzyme, its hydrolysis in mammalian tissues is catalyzed by a very specific cytosolic 25 kDa thiamine triphosphatase (ThTPase). Because of this activity, steady-state ThTP levels are kept low in mammalian cells. ThTPase belongs to the CYTH superfamily of proteins which has representatives in all superkingdoms of life acting on tripolyphosphate and various triphosphorylated substrates. Although the whole chromosome region containing the ThTPase gene was lost in birds, orthologs of the ThTPase gene were found in all other known metazoan genomes. It seems that ThTPase activity appeared as a secondary acquisition of the CYTH proteins in the lineage leading from cnidarians to vertebrates. In particular, the Trp-53 residue of mammalian ThTPases plays a key role in substrate recognition and specificity by interacting with the thiazole part of ThTP. This residue is conserved in metazoan CYTH proteins with ThTPase activity. In order to gain insight into the physiological function(s) of the ThTP-ThTPase couple, we tried to produce a mouse invalidated in 25-kDa ThTPase. Surprisingly, we were unable to obtain any knockout animal, apparently because ThTPase seems to be required for spermatogenesis. As we previously showed that the enzyme is much more abundant in differentiated versus undifferentiated cells, we suspect that 25-kDa ThTPase might play a more general and important role during cell differentiation. Acknowledgments This work was supported by the F.R.S.-FNRS. LB and BL are respectively Research Director and Research Associate at the F.R.S.-FNRS. [less ▲]

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

Conference (2014, May 24)

The current society needs to fight against the growing of sedentary lifestyles among the population all around the world. The school environment is identified as a pillar of the multisectorial approach ... [more ▼]

The current society needs to fight against the growing of sedentary lifestyles among the population all around the world. The school environment is identified as a pillar of the multisectorial approach that should be implemented to avoid that children who born today do not live less longer than their parents. The presentation will focus on four topics: (1) The role of school in physical activity (PA) promotion; (2) The dimensions of PA at school; (3) The action that physical education (PE) teacher can play; (4) The role of PE teacher educators in the improvement of the PE adaptation to the current needs. For one child, there are several opportunities to be physically active at school but the part of the school in youth PA is not well documented. Since recently, the only strong evidence of the effectiveness of interventions aiming to promote PA in youth was identified in adolescents when school and family/community environments are combined. However, some reviews have now revealed that school-based PA interventions can be effective for improvements in BMI, motor performance, physical activity, knowledge … In order to design one PA promotion project at school, five dimensions should be considered: (1) Physical education; (2) Sport at school (links to the community); (3) Active transportation; (4) Life environment (recesses, spaces); (5) Physical activity in the classroom. All these dimensions should be supported by a strong school policy that considers PA as a key aspect for the youth development. It means that packages of school-based strategies need to be developed. Nevertheless, PE seems to be a central aspect emphasizing the key role of the PE teachers who should become the PA promoters in every school. Unfortunately, since few decades, PE is facing a worldwide crisis raising questions about its quality and focusing on the teaching process, the inadequate school-community co-ordination, the focus on competition performance sport and the lack of interest on basic human movement and needs. Three concepts are now influencing some changes: (1) The physical literacy; (2) The accountability, and; (3) The Quality Physical Education (QPE). This means that, in PE, a special emphasis should now be set on the acquisition by the youth of knowledge, skills and attitude that will make them physically educated persons for their whole life, with the purpose to reach concrete improvements and to respect students’ needs and motivational characteristics. PE teachers have to show what they are doing in the promotion of an active lifestyle, using sports like a tool for general aims and not as a final objective. On the field, this means that new contents and teaching strategies have to be developed. The involvement of the students and the implementation of their learning into the real life should become a priority. Collaboration with other actors of the educational community (other teachers, parents) or the local community (sport clubs, sport administrations, private sector …) should be developed. PE teachers have to take these new roles. To achieve such change, they need to be supported by the PE teacher educators who have to emphasize the new educating strategies, develop concrete material and resources, contribute to create communities of practice, provide evidence based data supporting the effectiveness of the new approaches. The presentation will propose systematic ‘give and go’ between theory and practice in order to connect researchers and physical education teachers, underlining that PE can only grow with such collaboration and development of a networking. [less ▲]

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See detailCréativité et rétablissement
Vandeninden, Elise ULg

Conference (2014, May 23)

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See detailAge de retraite et risque de démence : effet du genre et de la profession
Grotz, Catherine ULg; Letenneur, Luc; Meillon, Céline et al

Conference (2014, May 23)

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See detailAllergies alimentaires : quel bilan ?
GADISSEUR, Romy ULg

Conference (2014, May 23)

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See detailWestern lowland gorilla in a logging concession: comparison of density and nesting behavior before and after logging
Haurez, Barbara ULg; Petre, Charles-Albert ULg; Doucet, Jean-Louis ULg

Conference (2014, May 22)

Timber exploitation is rapidly expanding throughout the Congo Basin. In Gabon, timber industry is currently the second working sector and logging concessions cover 45% of the country forest area, largely ... [more ▼]

Timber exploitation is rapidly expanding throughout the Congo Basin. In Gabon, timber industry is currently the second working sector and logging concessions cover 45% of the country forest area, largely overlapping with the range of western lowland gorilla (Gorilla gorilla gorilla WLG). Logging may negatively impact gorilla because of an increase in hunting pressure linked to human concentration and easier access to forest. On the other hand, WLG might benefit from forest opening and the associated growth in Terrestrial Herbaceous Vegetation, following timber felling and roads/trails implementation. In the present study, gorilla density and nesting behavior were studied in a 617,000-ha logging concession located in Central Gabon. A Standing Crop Nest Count census was realized 25 years after the first timber harvesting cycle, consisting in the assessment of the potentiality of logged forest to hold viable WLG populations. A second census was undertaken four to six months after the second logging wave. Comparing nesting behavior and estimated gorilla density between the two census allows to highlight the short-term effects of logging on gorilla populations. A relatively high WLG density was observed during the first census (2.1 weaned gorillas/km²). This figure dropped down to 1.0 weaned gorillas/km² after the second felling cycle. Both density values fall within the range of documented WLG densities documented at other sites. Gorillas consistently nested preferentially in open terra firme forest and built the majority of their nests using herbs of the Marantaceae and Zingiberaceae families. Both these observations underline the importance of Terrestrial Herbaceous Vegetation for nesting. The results of this study suggest that timber exploitation and WLG conservation are not mutually exclusive. The initial high density might traduce an effective anti-poaching strategy for now. The decline in gorilla density observed directly in the second census is probably linked with the avoidance of the disturbance of logging operations. Monitoring the evolution of WLG density would be important in order to control if the figure will rise over time to reach its initial value, but also to assess if a positive effect of Terrestrial Herbaceous Vegetation growth will be observed. [less ▲]

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See detailDetection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)
Esser, Céline ULg; Kleyntssens, Thomas ULg; Bastin, Françoise ULg et al

Conference (2014, May 22)

Multifractal analysis is concerned with the study of very irregular signals. For such functions, the pointwise regularity may change widely from a point to another. Therefore, it is more interesting to ... [more ▼]

Multifractal analysis is concerned with the study of very irregular signals. For such functions, the pointwise regularity may change widely from a point to another. Therefore, it is more interesting to determine the spectrum of singularities of the signal, which is the Hausdor ff dimension of the set of points which have the same H ölder exponent. For real-life signals, the computation of the spectrum of singularities from its de finition is not feasible. Multifractal formalisms are used to approximate this spectrum. Currently, there exist several methods. In this talk, we present a new multifractal formalism based on the wavelet leaders of a signal which allows to detect non concave and non increasing spectra. [less ▲]

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See detailPersistence of decomposition odour in soil analysed by GC×GC-TOFMS
Perreault, K; Stefanuto, Pierre-Hugues ULg; Stuart, B et al

Conference (2014, May 22)

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See detailMultifractal analysis of air temperature signals using the wavelet leaders method
Deliège, Adrien ULg; Nicolay, Samuel ULg

Conference (2014, May 22)

We use the discrete "wavelet transform microscope" to show that the surface air temperature signals of weather stations selected in Europe are monofractal. This study reveals that the information obtained ... [more ▼]

We use the discrete "wavelet transform microscope" to show that the surface air temperature signals of weather stations selected in Europe are monofractal. This study reveals that the information obtained in this way are richer than previous works studying long range correlations in meteorological stations. The approach presented here allows to bind the Hölder exponents with the climate variability. We also establish that such a link does not exist with methods previously carried out, such as the detrended fluctuation analysis. [less ▲]

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See detailApplications des microalgues
Franck, Fabrice ULg; Remacle, Claire ULg

Conference (2014, May 22)

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See detailDe France-Ville à la Panachie : (in)confort urbain et hygiène sociale dans le roman dystopique (1880-1940)
Stienon, Valérie ULg

Conference (2014, May 22)

Si la dystopie française choisit volontiers pour cadre la métropole parisienne, elle développe aussi la représentation de villes imaginaires, généralement désignées par un toponyme original : France-Ville ... [more ▼]

Si la dystopie française choisit volontiers pour cadre la métropole parisienne, elle développe aussi la représentation de villes imaginaires, généralement désignées par un toponyme original : France-Ville (Jules Verne, Les Cinq Cent Millions de la Bégum), Industria-City (Didier de Chousy, Ignis), la Morticolie (Léon Daudet, Les Morticoles), la Pingouinie (Anatole France, L’Île des Pingouins), la Siturgic (Claude Farrère, Les Condamnés à mort), Kentropol (Henri Allorge, Le Grand Cataclysme), la Panachie (Régis Messac, La Cité des asphyxiés), la Crétinie (Régis Messac, Valcrétin). Ces entités topographiques font l’objet de descriptions précises et détaillées, qui ancrent une organisation urbaine imaginaire dans un cadre narratif réaliste. L’architecture de la ville et l’infrastructure de l’habitat participent directement à l’élaboration de ces mondes alternatifs où il ne fait pas toujours bon vivre, depuis les aléas de l’application du programme hygiéniste de la « cité du bien-être » (Verne) jusqu’au monde souterrain inversé, alimenté par les déjections des classes inférieures (Messac). Toutes ces villes ont en commun de faire face à des tensions internes (révolte d’hommes-robots dans Industria-City et d’ouvriers dans la Siturgic, rationnement des ressources en Panachie, cruauté des habitants de Morticolie, dégénérescence des autochtones de Crétinie, explosions terroristes en Pingouinie) et à des menaces extérieures à l’origine de réorganisations géopolitiques qui placent les cités en rivales et ennemies (France-Ville attaquée par Stahlstadt, Kentropol en guerre contre Hérakloupol). Une étude de la poétique des infrastructures urbaines imaginées dans le roman dystopique français permet de préciser cette tension entre un élan réformiste vers le confort, l’efficacité et l’hygiène, et le constat d’une faible résistance aux obstacles fragilisant la ville comme entité humaine et matérielle. Les configurations de l’habitat, l’innovation des transports en commun et le fonctionnalisme du décorum domestique affichent simultanément leur efficacité et leur fragilité. Pour en rendre compte, deux aspects de la poétique urbaine du roman dystopique seront examinés. D’une part, l’intertextualité – explicite ou allusive – avec le discours architectural qui fonde l’agencement et la répartition des composantes de la ville (Le Corbusier cité dans Ravage de Barjavel, par exemple). D’autre part, le jeu de miroir entre les morphologies humaines, les valeurs sociales et les fonctions assignées aux bâtiments : symétrie synonyme d’intransigeance bornée et impitoyable (Daudet, Les Morticoles), répertoire littéraire urbain (Flaubert Street, Rosetti Park et Proust Avenue sur l’Île des Articoles d’André Maurois), interpénétration tératologique du corps à l’infrastructure (Xavier de Langlais, L’Île sous cloche). [less ▲]

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See detailDetection of non concave and non increasing multifractal spectra using wavelet leaders (Part II)
Kleyntssens, Thomas ULg; Esser, Céline ULg; Nicolay, Samuel ULg

Conference (2014, May 22)

This talk follows "Detection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)" given by Céline Esser. A multifractal formalism is a numerically computable formula that ... [more ▼]

This talk follows "Detection of non concave and non increasing multifractal spectra using wavelet leaders (Part I)" given by Céline Esser. A multifractal formalism is a numerically computable formula that approximates the spectrum of singularities of a function. A new multifractal formalism based on the wavelet leaders is presented as well as a comparison with other formalisms. Its main advantages are that it allows to detect non concave and non increasing spectra. An implementation is proposed. [less ▲]

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See detailCan Brand Engagement Be Built through the Brand Communication Style? The Role of Anthropomorphism.
Gretry, Anaïs ULg; Horváth, Csilla; Van Riel, Allard

Conference (2014, May 21)

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See detailWhat Do Lawyers Do With Science? - A View from Consumer Protection on Psychology and Neuroscience
Sibony, Anne-Lise ULg

Conference (2014, May 21)

In this conference adressed to students and researchers in Neurosciences, I will present a legal perspective on some uses of neurosciences for marketing purposes. Legal, technical and ethical questions ... [more ▼]

In this conference adressed to students and researchers in Neurosciences, I will present a legal perspective on some uses of neurosciences for marketing purposes. Legal, technical and ethical questions will be articulated. I will further present some thoughts on legal use of scientific insights on human behaviour. [less ▲]

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See detailStrategies to combine novel traits across countries: example of heat stress
Hammami, Hedi ULg; Vandenplas, Jérémie ULg; Carabaño, Maria Jesus et al

Conference (2014, May 21)

Nowadays, novel traits are of great interest. However, phenotypes are siloed and mainly not shared. Heat stress is becoming problematic affecting animals’ performances and their well-being. Heat stress ... [more ▼]

Nowadays, novel traits are of great interest. However, phenotypes are siloed and mainly not shared. Heat stress is becoming problematic affecting animals’ performances and their well-being. Heat stress tolerance as a novel trait is only addressed by isolated within-country research studies. Integration and combination of local and foreign information sources is needed for better accuracy genetic evaluations. Therefore, this study was aimed to test the potential combination of sources of external information towards the evaluation of heat stress tolerance of dairy cattle. Long-term cow performances linked to environmental descriptors (weather parameters as proxy to climate change) collected over 10 years under the temperate conditions of the Walloon Region of Belgium and the hotter and warm Mediterranean conditions of Andalusia and Castile-La-Mancha Spanish regions were available. A total of 1,604,775 milk, fat, and protein test-day (TD) records linked to average daily temperature humidity (THI) values for 3-day lag before each TD were considered. Under a first strategy considering free-access to raw-data (phenotype and pedigree), a joint evaluation was firstly run using reaction norm models where production traits were considered as function of THI. A Belgian and a Spanish evaluation were also run using the same model. An alternative strategy considering only access to external information (i.e. regression coefficients for additive genetic effects (â and their associated REL)) was tested. In this case, foreign â and their REL resulting from the Spanish evaluation were first converted to the Belgian trait and thereafter integrated in the Belgian evaluation using a Bayesian approach. Rank correlations between regression coefficients, â (of the 1,104 bulls having daughters only in Spain) estimated by Belgian evaluation and â estimated by the joint evaluation were moderate (<=0.70). Corresponding rank correlations between â estimated by joint and Bayesian evaluations were significantly higher (ranging from 0.967 to 0.998), indicating that the Bayesian evaluation integrating external information was in good concordance with the joint evaluation. Results from this study indicated that the integration of external information via the Bayesian approach has a good potential to improve the genetic evaluation of sparse and siloed novel traits. [less ▲]

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See detailL’apprentissage de résolution de problèmes complexes (ARP - C) : un dispositif d’entrainement au travail interdisciplinaire
Maillart, Christelle ULg; Leclercq, Anne-Lise ULg; Lejeune, Caroline ULg et al

Conference (2014, May 21)

Les futurs logopèdes et futurs psychologues doivent apprendre à s’intégrer dans une prise en charge multidisciplinaire, à interagir efficacement avec d’autres professionnels, et à comprendre les limites ... [more ▼]

Les futurs logopèdes et futurs psychologues doivent apprendre à s’intégrer dans une prise en charge multidisciplinaire, à interagir efficacement avec d’autres professionnels, et à comprendre les limites de leur champ d’intervention. Pour entrainer ces apprentissages critiques, un dispositif interdisciplinaire a été proposé à 36 étudiants en logopédie et 14 étudiants en psychologie, tous en cinquième année de leur formation initiale à l’Université de Liège. Ces étudiants ont été confrontés à une vignette clinique dont la complexité justife le recours à divers intervenants. Cette vignette a été, dans un premier temps, analysé en petits groupes disciplinaires avec l’aide d’un tuteur (4 groupes en logopédie et 2 groupes en neuropsychologie). Ensuite, des groupes interdisciplinaires (composés de logopèdes et de neuropsychologues) ont été formés pour partager leurs analyses et avancer dans la formulation du diagnostic. Enfin, les étudiants ont eu l’occasion de rencontrer des professionnels d’autres disciplines (instituteur, psycho-pédagogue, etc.) avec lesquels ils ont du discuter des questions en suspens liées à la vignette analysée. L’évaluation du dispositif suggère que globalement les étudiants ont le sentiment d’avoir progressé quant à la maitrise de certains apprentissages critiques. Plus de 90% des étudiants relatent avoir progressé en évaluation pluridisciplinaire et différents indices indiquent qu’ils perçoivent l’intérêt de recourir à un réseau de professionnels. Par ailleurs, la perception du dispositif peut être différente selon les disciplines. Ainsi, 90% des psychologues mais seulement 60% des logopèdes estiment avoir progressé dans la prise de décisions argumentées par rapport à l’évaluation. Inversement, 30% des psychologues mais plus de 70% des logopèdes relatent des progrès pour la capacité à prioriser les recommandations thérapeutiques. Ces résultats seront analysés et discutés. [less ▲]

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See detailHigh throughput sequencing of aphid haemolymph reveals endosymbiont diversity
De Clerck, Caroline ULg; Leonard, Simon; Joncour, Pauline et al

Conference (2014, May 20)

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See detailLong term spatial and temporal variability in catches of common spiny lobster Palinurus elephas (Fabricius, 1787) in Corsica (NW Mediterranean): fisheries trends, biological trends or both?
Pere, Anthony; Astrou, Adèle; Patrissi, Michela et al

Conference (2014, May 20)

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As ... [more ▼]

The small-scale fishing fleet of Corsica (France, NW Mediterranean) is mostly composed of small artisanal boats. The common spiny lobster, Palinurus elephas, is the most valuable of all caught species. As a result, it is the main target of most fishermen during the 7-months fishing season. Populations of this species seem to decrease since the 1950's. The aim of this study was to understand if this decline could be linked with overfishing, or if other biological, ecological or climatic factors could explain this population drop. To achieve this goal, we combined 1) a meta-analysis of all data concerning fishing effort and captures in published and grey literature and 2) an on-board monitoring program that started in 2004. Using obtained data, we followed fleet structure, fishing effort and captures evolution from 1950 to 2011. Our results point out an important capture decrease during the 20th century. This trend started during the 1950’s and 1960’s, when trammel nets replaced traditional wood traps. A micro-regional analysis revealed that exploitation intensity widely varied among different areas around the island. Moreover, landings and catch rates showed important spatial and temporal variations. This could be caused by changes in recruitment rates. However, recruitment processes of this species are still poorly understood. Improving our knowledge of common spiny lobster life cycle will likely lead to a more comprehensive and efficient assessment of Corsican stocks of this species. [less ▲]

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See detailDu référentiel aux trajectoires développementales : élaboration d’apprentissages critiques en logopédie.
Maillart, Christelle ULg; Peters, Stéphanie ULg; Willems, Sylvie ULg et al

Conference (2014, May 20)

Depuis quelques années, la formation de master en logopédie (orthophonie) de l’université de Liège tente de s’inscrire dans une approche par programme. Cette transition progressive d’une formation ... [more ▼]

Depuis quelques années, la formation de master en logopédie (orthophonie) de l’université de Liège tente de s’inscrire dans une approche par programme. Cette transition progressive d’une formation orientée objectif vers une formation orientée programme a connu plusieurs étapes déterminantes. L’une d’elle est sans conteste l’élaboration d’un reférentiel de compétences en logopédie (Maillart et al., 2010) qui a permis de dégager les cinq compétences identifiées comme centrales et essentielles à la profession de logopède. Chacune de ces compétences a été nommée, détaillée et précisée à travers ses composantes essentielles qui en explicitent la complexité. Ensuite, les contextes de mise en œuvre de chaque compétence ont été identifiés par différentes situations professionnelles. Le référentiel élaboré était donc une première étape, nécessaire mais non suffisante, pour modifier en profondeur les programmes de cours du master en logopédie. En effet, le référentiel permet de clarifier les principaux objectifs de la formation, traduits en termes de niveau final attendu de développement de chaque compétence. Par contre, il donne peu d’informations sur leur trajectoire de développement. Il ne permet pas d’identifier les différentes étapes de travail d’une compétence (les apprentissages critiques) ou les paliers de développement à atteindre au fur et à mesure de la formation initiale. Dans cet exposé, nous expliciterons la démarche qui nous a permis de dégager des apprentissages critiques spécifiques et opérationalisables et de complexité progressive à partir d’un référentiel existant. [less ▲]

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See detailModeling of a glass mineral wool process in view of Life Cycle Analysis
Gerbinet, Saïcha ULg; Léonard, Angélique ULg; Briard, Vincent

Conference (2014, May 20)

In line with the growing concern about the environmental impact of materials in the building sector, Knauf Insulation, a glass wool producer, is performing environmental impact assessment of its products ... [more ▼]

In line with the growing concern about the environmental impact of materials in the building sector, Knauf Insulation, a glass wool producer, is performing environmental impact assessment of its products through LCA. Knauf Insulation has several glass wool factories in Europe that produce various products, and for a specific market, the same product can be produced in several factories. As the plants that produce glass wool work with similar pathways, a generic model for LCA usable for every plant and every glass wool product has been designed. The general principle of glass wool production is the following: the raw materials, sand, limestone, soda ash, borax, sodium carbonate, as well as recycled off-cuts from the production process, are weighed and mixed. Knauf Insulation also uses a large amount of recycled glass (cullet). The mix is sent to a furnace at high temperature (1350°C). The melted material is then fiberized and the binder is added, a process called forming. Knauf Insulation uses a special binder with ECOSE Technology, a new and formaldehyde-free binder. The wool fibers are collected, by suction, on a conveyor belt, and the mattress then goes through the curing oven. For some products a facing is added. Finally the product is compressed and packed. Specific attention is put in certain LCA aspects, such as allocations procedures, and we have used ISO 14040 and 14044 along with the ILCD handbook as guides dur-ing the model development. LCA is performed from raw materials extraction to end-of-life. Nevertheless, the impacts of the insulation system use phase are not included, as they strongly depend on parameters such as construction systems, etc. The functional unit is defined as 1 m3 of specific glass mineral wool product. The model, implemented in GaBi 6, is made as generic as possible by including, for each step, all the raw materials that can be used in one of the factories as well as all the energy sources. Parameters allow to define the amount of each raw material consumed, therefore the model can be adapted to any factory simply by setting these parameters accordingly. Moreover, the transport distances are also parameters and the origin of the energies (electricity or heat) can also be selected. This simplifies the data collection, since the template is the same for all the factories, it can be supported by data collection tools already existing. A part of the model is dedicated to weighting between factories, so a combination of factories can also be studied. This allows to study products sold on a specific market. The model can also be adapted to almost all Knauf Insulation products by using parameters where necessary: for example, several products have different binder contents, so a parameter defines the amount of binder. As some materials can be recycled between several parts of the process, special attention has been paid to recycling loops inside the model. The model is flexible enough to be used for Environmental Product Declaration (EPD) as well as for Eco-Design purposes. [less ▲]

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See detailLearning by doing. Policy analysis through focus groups investigation in bachelor curriculum
Fallon, Catherine ULg

Conference (2014, May 20)

À l’Université de Liège, les étudiants de deuxième année de baccalauréat en science politique sont invités depuis quelques années à réaliser un exercice de focus group dans le cadre du cours de ... [more ▼]

À l’Université de Liège, les étudiants de deuxième année de baccalauréat en science politique sont invités depuis quelques années à réaliser un exercice de focus group dans le cadre du cours de méthodologie qualitative. C’est l’accumulation de matériaux – travaux écrits des étudiants, observation des focus groups par les évaluateurs de l’exercice, procès verbaux des réunions entre étudiants, courriels échangés avec le personnel scientifique et académique, éléments d’autocritique rétrospective des étudiants issus de leur rapport d’analyse – qui fait l’objet de ce chapitre. Par conséquent, s’il est certes question de montrer l’intérêt que représente la mobilisation de la technique des groupes focalisés, ce chapitre est surtout l’occasion de mettre plus particulièrement en évidence . les apports d’un tel outil dans le cadre d’un cursus universitaire à destination des étudiants en science politique. Dans ce cadre et dans un souci d’illustration, il sera régulièrement ponctué d’extraits issus des rapports d’analyse d’étudiants. D’une manière générale, la réalisation d’entretiens de groupe comporte quelques difficultés qui rendent l’apprentissage de l’étudiant d’autant plus intéressant qu’il comporte une dimension quasi ludique. Elle reste une épreuve enrichissante non seulement par la conduite de la discussion, la dynamique de groupe qu’elle génère et l’analyse dont elle fait l’objet, mais également par l’organisation et la coordination que requiert sa mise en place. [less ▲]

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See detailPostmortem Measurement of Cadaveric VOCs in Human Internal Cavity Gases
Stefanuto, Pierre-Hugues ULg; Varlet, V; Grabherr, S et al

Conference (2014, May 20)

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See detailLa reconstruction du système d’éducation en contexte post-conflit armé au Kosovo - La survivance des dispositions développées par la Minuk pour favoriser le vivre ensemble par l’éducation primaire
Pierre, Alexia ULg

Conference (2014, May 20)

Le contexte international des années 1990 a permis que certaines prérogatives considérées comme d’un ressort national deviennent des préoccupations internationales, entraînant des positionnements de la ... [more ▼]

Le contexte international des années 1990 a permis que certaines prérogatives considérées comme d’un ressort national deviennent des préoccupations internationales, entraînant des positionnements de la Communauté internationale. C’est le cas de l’éducation. D’abord identifiée comme facteur du développement économique et social, l’éducation est peu à peu vue comme un outil de prévention des conflits armés et des violations massives du droit international humanitaire, de par sa capacité à intervenir dans la construction précoce du vivre ensemble. L’exemple du Kosovo permet d’explorer la reconstruction par la Communauté internationale, à travers la Minuk, d’un système éducatif en contexte post-conflit armé non international. Cette étude vise à appréhender la survivance actuelle, dans les écoles primaires de la capitale kosovare Prishtina, des dispositions développées par la Minuk pour favoriser le vivre ensemble par l’éducation en reflet des positionnements internationaux. En avril 2012, une recherche menée dans les écoles de Prishtina, par le biais de questionnaires et auprès d’acteurs du système éducatif actuel du Kosovo rencontrés en entretiens, a permis d’obtenir des éléments de réponse sur l’insertion et la traduction des positionnements internationaux sur l’éducation dans le cadre normatif et législatif kosovar lié à l’éducation primaire, ainsi que sur la survivance et la forme actuelle de ces dispositions dans les écoles primaires de la capitale. Il apparait à travers cette recherche exploratoire, dont l’objectif est d’obtenir une image de la traduction des dispositions internationales en matière d’éducation post-conflit interne dans les écoles primaires de Prishtina, que si la structure nécessaire à la dispense de ce type d’éducation a été massivement appliquée aux écoles de Prishtina, les limites inhérentes au terrain ne leur permettent pas un développement suffisamment rapide pour une bonne adaptation à cette structure et son développement correct. [less ▲]

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See detailLes composites à matrice métallique/céramique – De nouveaux procédés de fabrication pour de nouvelles applications
Mertens, Anne ULg; Lecomte-Beckers, Jacqueline ULg

Conference (2014, May 20)

A l’heure où la plupart des matériaux composites essentiellement structuraux sont faits d’une matrice à base polymère, les matériaux composites à matrice métallique ou céramique offrent de nouvelles ... [more ▼]

A l’heure où la plupart des matériaux composites essentiellement structuraux sont faits d’une matrice à base polymère, les matériaux composites à matrice métallique ou céramique offrent de nouvelles perspectives en termes de performances et de durabilité. Le présent exposé s’attache plus particulièrement à retracer les possibilités offertes par de nouvelles méthodes de mise en oeuvre telles que la friction-malaxage et les techniques d’impression 3D, aussi bien en termes d’amélioration des propriétés mécaniques des matériaux composites que des fonctionnalités inédites qui peuvent leur être conférées. [less ▲]

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See detailHumanisme de conviction ou humanisme instrumental ? Une comparaison des directeurs de prison belges et français
Dubois, Christophe ULg; Mouhanna, Christian

Conference (2014, May 20)

Bien que peu étudiés, les directeurs de prison se situent au centre de l’institution pénitentiaire et font office de véritables interfaces entre les politiques étatiques et les pratiques locales. L’étude ... [more ▼]

Bien que peu étudiés, les directeurs de prison se situent au centre de l’institution pénitentiaire et font office de véritables interfaces entre les politiques étatiques et les pratiques locales. L’étude empiriquement ancrée des pratiques de ce groupe professionnel révèle divers modes de prise en compte de la question humaniste par les acteurs d’un « système pénitentiaire » souvent considéré comme dominé par « l’impératif sécuritaire ». Quant à l’analyse de leurs discours, elle permet de rendre compte du positionnement particulier de nombreux directeurs de prison vis-à-vis de leur administration (collectivement, via les syndicats et associations de directeurs, ou individuellement, via les médias et autres publications) et vis-à-vis de l’institution judiciaire (juges d’instruction, tribunaux de l’application des peines, Conseil d’Etat). Notre contribution repose sur deux enquêtes réalisées au cours des trois dernières années auprès de directeurs belges (n = 32) et français (n = 20). Les degrés de hiérarchisation et de judiciarisation des contextes de travail des directeurs varient au sein des ces deux pays et déterminent, en partie, les modalités d’interaction quotidienne des directeurs en détention (avec les détenus, les services psychosociaux, les surveillants, etc.) et autour de la détention (avec l’administration centrale, le TAP, la justice, les associations diverses, etc.). Il s’agira de saisir et de rendre visible la dimension humaniste du travail des directeurs, tant au niveau de leurs pratiques (cultures professionnelle et organisationnelle) que de leurs discours professionnels (logiques de justification). En effet, ce qu’ils qualifient, par exemple, d’ « empathie », d’ « intensité des relations », de « recherche du sens de leur travail » et de « sens de la peine », semblent orienter leur travail dans des marges qu’il conviendra de préciser. [less ▲]

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