Last 7 days
Bookmark and Share    
Peer Reviewed
See detailÉtude du corps-pour-autrui dans l'anorexie mentale
Minguet, Eugénie; Englebert, Jérôme ULg

Poster (2015, October 16)

Detailed reference viewed: 33 (1 ULg)
Peer Reviewed
See detailÉtude des Expériences Corporelles Anormales dans la schizophrénie
Lancellotti, Elisa; Englebert, Jérôme ULg

Poster (2015, October 16)

Detailed reference viewed: 38 (0 ULg)
See detailMediating science, technology, and society at the Belgian Nuclear Research Centre SCK/CEN through hybrid management: The case of PISA
Schröder, Jantine; Van Oudheusden, Michiel ULg; Rossignol, Nicolas ULg et al

Conference (2015, October 16)

Despite growing recognition that the technical and social dimensions of technology development are coproduced, research and policymaking in the nuclear field is still predicated on the separation between ... [more ▼]

Despite growing recognition that the technical and social dimensions of technology development are coproduced, research and policymaking in the nuclear field is still predicated on the separation between both dimensions. This paper explores how this separation is enacted, and occasionally questioned and transformed, within the Belgian context of nuclear technology. It situates the emergence of a science policy support (SPS) unit and programme (PISA) within the Belgian Nuclear Research Centre SCK•CEN as an institutional response to the need of integrating societal and ethical concerns into nuclear research. The paper elicits how since 1999, SPS/PISA draws together science and technology studies (STS) and technology assessment (TA) approaches, creating links between nuclear research innovation and society in mutually beneficial ways. To this end, it first outlines the four areas in which SPS/PISA researchers are active: 1. Ethics of nuclear technology assessment; 2. Radioactive waste management; 3. Safety governance; 4. Perception and communication of ionising radiation risks. As SPS/PISA research is situated in a trading zone that embeds scholarship, nuclear research and research policy, the paper illuminates the growing entanglement of the natural and social sciences, and the roles social scientists play in the development of contemporary technologies and technology policy. Drawing on the notion of hybrid management (Miller 2001), the paper argues that SPS/PISA researchers must develop a language that underlines the interdependency between science, policy, and politics, while acknowledging that actors (policymakers, industry representatives, natural and social scientists, citizens) recurrently draw distinctions between these domains as a means of collectively managing nuclear issues. SPS/PISA research is therefore best understood as boundary work that mediates between various interests, values, and "knowledges." The paper concludes by discussing the key challenges SPS/PISA researchers face while engaging in work of this kind: maintaining professional independence and credibility, ensuring research continuity, and generating both scientific and policy impacts. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailEvaluation de la connaissance relationnelle chez les enfants dysphasiques
Krzemien, Magali ULg; Leroy, Sandrine ULg; Maillart, Christelle ULg

Poster (2015, October 16)

La dysphasie est un trouble spécifique du développement du langage oral qui fait l’objet de nombreuses recherches mais dont certains aspects sont encore mal connus. Les théories explicatives de ce trouble ... [more ▼]

La dysphasie est un trouble spécifique du développement du langage oral qui fait l’objet de nombreuses recherches mais dont certains aspects sont encore mal connus. Les théories explicatives de ce trouble prolifèrent, notamment suite au développement de l’approche cognitivo-fonctionnelle du langage qui permet de concevoir celui-ci comme étant en interaction avec des processus généraux et non-linguistiques. En particulier, la théorie des grammaires de construction soutient que le langage s’acquiert par une abstraction progressive des formes entendues qui deviennent alors des schémas de construction. Ce mécanisme serait lié au raisonnement analogique. Or, les enfants présentant une dysphasie semblent détenir de faibles capacités de raisonnement analogique par rapport à leurs pairs de même âge. Nous nous demandons donc à quoi pourrait être dû ce déficit, en nous intéressant à un élément déterminant du raisonnement analogique : la connaissance relationnelle. Une tâche de scènes analogiques a été proposée à un groupe d’enfants présentant une dysphasie et à deux groupes contrôles, l’un apparié en âge linguistique et l’autre en mémoire de travail. Les participants devaient sélectionner l’élément détenant le même rôle relationnel qu’un élément pointé dans un dessin présenté au préalable. Les relations étaient similaires pour chaque item mais la nature des indices perceptuels variaient selon la condition : dans une condition, les indices perceptuels et relationnels concordaient, alors que dans une autre ils discordaient. Dans une troisième condition, aucune similarité perceptuelle n’était présente. Tous les enfants semblent bénéficier de la congruence entre informations perceptuelles et relationnelles. De plus, les enfants présentant une dysphasie détiennent des compétences de raisonnement analogique semblables à leurs pairs de même âge linguistique et de mêmes capacités de mémoire de travail. Ils semblent également posséder des connaissances relationnelles relativement préservées par rapport à leurs pairs de même âge mais des difficultés apparaissent quand la tâche se complexifie, notamment quand des distracteurs perceptuels doivent être inhibés. Ceci semble pouvoir être expliqué par les troubles langagiers et les déficits en mémoire de travail liés à la dysphasie. De futures études devront néanmoins écarter l’hypothèse d’une différence qualitative des représentations relationnelles entre des enfants présentant une dysphasie et d’autres ayant un développement langagier normal. [less ▲]

Detailed reference viewed: 23 (5 ULg)
Full Text
Peer Reviewed
See detailAnalysis of a concrete building exposed to natural fire
Sauca, Ana ULg; Gernay, Thomas ULg; Robert, Fabienne et al

in Wald, F.; Burgess, I.; Jelcic Rukavina, M. (Eds.) et al Proceedings of the Int. Conf. ASFE in Dubrovnik, 15-16 October 2015 (2015, October 16)

In this paper is presented the analysis of a concrete building exposed to OZone fire. The temperature development in the elements and the structural behaviour were calculated in SAFIR using beam elements ... [more ▼]

In this paper is presented the analysis of a concrete building exposed to OZone fire. The temperature development in the elements and the structural behaviour were calculated in SAFIR using beam elements for the columns and beams and shell elements for the floor slabs. The first floor was modelled and the effects of action from the upper storeys are applied as external loads. It is shown how the numerical analysis allows understanding the behaviour of the structure when exposed to a natural fire until complete cooling by analysing the evolution of displacements, the distributions of bending moments in the beams, the membrane forces in the slab, and the stresses in the elements. All this detailed information would not be available from an experimental test. [less ▲]

Detailed reference viewed: 39 (4 ULg)
Full Text
See detailThe development of Structural Fire Engineering over the past 25 years and issues for the future
Franssen, Jean-Marc ULg

Conference (2015, October 15)

This talk presents a series of thoughts of the author from his observation of the evolution of structural fire engineering since the beginning of his career Experimental research works are discussed ... [more ▼]

This talk presents a series of thoughts of the author from his observation of the evolution of structural fire engineering since the beginning of his career Experimental research works are discussed, either on the behavior of materials or on the behavior of structures. The rest of the presentation is dedicated to calculation methods: tabulated data, simple calculation models and general calculation models. For numerical calculation models, the presentation contains a brief history of appearance of different software, of their objectives, of their capabilities… Some examples are presented of structures recently modelled in real applications. Possible abusive utilizations of numerical modelling are also shown. The presentation ends with a presentation of some challenges that the discipline is facing for the future. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
See detailMise au point sur les neuropathies héréditaires
WANG, François-Charles ULg; BOUQUIAUX, Olivier ULg

Scientific conference (2015, October 15)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailBelgian International Lawyers and WWI. Networks, Experience and Memory
Genin, Vincent ULg

Poster (2015, October 15)

Detailed reference viewed: 22 (4 ULg)
Full Text
See detailLa médecine de famille, une connaissance complexe et multi facettes
Jamoulle, Marc ULg

Conference (2015, October 15)

Dans les conditions difficiles que doit affronter la Tunisie, soit faire face a l'augmentation de la demande en soins de santé, à l'amélioration de la qualité et à la transition démographique et ... [more ▼]

Dans les conditions difficiles que doit affronter la Tunisie, soit faire face a l'augmentation de la demande en soins de santé, à l'amélioration de la qualité et à la transition démographique et épidémiologique, la Médecine de Famille représente un atout certain. L'image internationale peu flatteuse de la médecine de famille Tunisienne est présentée au travers de sa présence dans les publications scientifiques. Une série de concepts spécifiques de la Médecine de Famille sont exposés ; la complexité, l'extension de la connaissance, l'incertitude, les différents niveaux de l'action. Leur prise en compte permet d'appeler à un autre regard et à un appel à écrire le métier d'une façon différente. Pour en sortir définitivement avec l'image délétère de ce métier exigeant. [less ▲]

Detailed reference viewed: 114 (11 ULg)
Full Text
Peer Reviewed
See detailThe impact of factors related to retirement on cognitive functioning
Grotz, Catherine ULg; Adam, Stéphane ULg; Matharan, Fanny et al

Conference (2015, October 15)

Detailed reference viewed: 43 (0 ULg)
Full Text
See detailDo Burundians have a more positive perception of older people than immigrants or Belgians?
Marquet, Manon ULg; Missotten, Pierre ULg; Nindaba, Desiderate et al

Poster (2015, October 15)

Detailed reference viewed: 31 (10 ULg)
Full Text
Peer Reviewed
See detailEfficient standard error formulas of ability estimators in item response theory
Magis, David ULg

Conference (2015, October 15)

This talk focuses on the computation of asymptotic standard errors (ASE) of ability estimators with dichotomous item response models. A general framework is considered, and ability estimators are defined ... [more ▼]

This talk focuses on the computation of asymptotic standard errors (ASE) of ability estimators with dichotomous item response models. A general framework is considered, and ability estimators are defined from a very restricted set of assumptions and formulas. This approach encompasses most standard methods such as maximum likelihood, weighted likelihood, maximum a posteriori, and robust estimators. A general formula for the ASE is derived from the theory of M-estimation. Well-known results are found back as particular cases for the maximum and robust estimators, while new ASE proposals for the weighted likelihood and maximum a posteriori estimators are presented. These new formulas are compared to traditional ones by means of a simulation study under Rasch modeling. [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
See detailEFFECTS OF AGRICULTURAL PRACTICES AND HEAVY METAL CONTAMINATION ON THE COMMUNITY DYNAMICS OF EARTHWORMS IN RELATION TO SOIL PHYSICAL AND CHEMICAL FACTORS IN AGRICULTURAL FIELDS (BELGIUM)
Lemtiri, Aboulkacem ULg

Doctoral thesis (2015)

We investigated the effect of different agricultural practices on the abundances, biomass, and species diversity of earthworms. Specifically, we aimed to identify the relationship between certain soil ... [more ▼]

We investigated the effect of different agricultural practices on the abundances, biomass, and species diversity of earthworms. Specifically, we aimed to identify the relationship between certain soil physico-chemical properties and earthworm communities in agricultural soils. Two tillage systems and crop residue management were investigated. After conducting the study over four years, we found that the abundance, biomass, and diversity of earthworms were negatively affected by tillage application and the removal of crop residues. All ecological groups were negatively affected by conventional tillage system and crop residues exportation. However, crop residues removal had a greater impact than the conventional tillage system. In this study area, the earthworm community was dominated by the endogeic species A. c. caliginosa (64%), while few epigeic and anecic species were observed (5%). Endogeic and epi-anecic (L. terrestris) species appeared to be highly influenced by tillage and of crop residues exportation. When crop residues were exported from the field, the concentrations of chemical elements were low, particularly P and K nutrients. Earthworm activity contributed to nutrient dynamics and soil structure after four years of incorporating of crop residues to the fields and reduced tillage application. No consistent relationship was detected between soil and earthworm variables, even though different soil properties responded differently with respect to the tillage systems, crop residues removal and the presence of certain earthworm species. The number of years that our field was managed might have also affected our results.On the basis of the primarily research focused on understanding how earthworms participate and contribute towards improving soil quality (structure, nutrient dynamics and fertility), we subsequently focused on investigating how two plants (Vicia faba and Zea mays) and the Eisenia fetida earthworm contribute to uptake of different metals: Cd, Zn, Pb and Cu from the land surrounding of a former Zn-Pb ore treatment plant. Specifically, we tested whether the earthworm Eisenia fetida could act as a catalyzor to enhance phytoremediation efficiency. After 42 days of exposure, our results showed that certain earthworm life-cycle traits are affected by metal contamination and by the addition of plants. Specifically, the concentrations of metals in earthworm tissues decreased in the presence of plants. Our findings demonstrate that earthworm activities modify the availability of metals in soils, enhancing metal uptake by plants. This innovative system offers new investigation possibilities by considering earthworm-plant-soil interaction. In conclusion, this work confirmed that earthworms are important catalyzor optimizing the phytoremediation processes of polluted soils. [less ▲]

Detailed reference viewed: 65 (16 ULg)
See detailL’insécurité de l’exclusion sociale : comment sortir de l’impuissance ?
Glowacz, Fabienne ULg

Scientific conference (2015, October 15)

Detailed reference viewed: 27 (1 ULg)
Full Text
See detailFiguras de traductor (no) profesional
Willson, Patricia ULg

Scientific conference (2015, October 15)

Detailed reference viewed: 15 (3 ULg)
Full Text
Peer Reviewed
See detailShear banding modelling in cross-anisotropic rocks
Pardoen, Benoît ULg; Seyedi, D.M.; Collin, Frédéric ULg

in International Journal of Solids and Structures (2015), 72

Sedimentary geomaterials such as rocks frequently exhibit cross-anisotropic properties and their behaviour depends on the direction of loading with respect to their microstructure. As far as material ... [more ▼]

Sedimentary geomaterials such as rocks frequently exhibit cross-anisotropic properties and their behaviour depends on the direction of loading with respect to their microstructure. As far as material rupture is concerned, localised deformation in shear band mode appears generally before cracks and material failure. The influence of cross-anisotropy on the shear strain localisation remains an important issue and is investigated in the present study. To do so, a constitutive elastoplastic cross-anisotropic model that includes anisotropy both on the elastic and plastic characteristics is defined. For the plastic part of the model, the anisotropy of a strength parameter is introduced with a microstructure fabric tensor. Then, the fractures are modelled with finite element methods by considering the development of shear strain localisation bands and an enriched model is used to properly reproduce the shear banding. The cross-anisotropy influence on shear banding is studied through numerical applications of small and large-scale geotechnical problems that engender fractures. The two considered applications are a plane-strain biaxial compression test and an underground gallery excavation. The numerical results provide information about the influence of cross-anisotropy on the appearance and development of shear bands. It has been noticed, among other observations, that the material strength vary with the loading direction and that the development and the shape of the excavation fractured zone that develops around a gallery is strongly influenced by the material anisotropy. [less ▲]

Detailed reference viewed: 41 (13 ULg)
Full Text
Peer Reviewed
See detailEnvironmental impact assessment of bio-based binders: from production to industrial applications
Gerbinet, Saïcha ULg; Belboom, Sandra ULg; Briard, Vincent et al

Poster (2015, October 15)

A binder is used to hold together the fibers forming the mineral wool products (see figure 1). These fibers can be produced from sand and recycled glass for glass wool products (see figure 2) or from rock ... [more ▼]

A binder is used to hold together the fibers forming the mineral wool products (see figure 1). These fibers can be produced from sand and recycled glass for glass wool products (see figure 2) or from rock (volcanic rock, typically basalt or dolomite) for stone wool products. Traditionally, the binders used in mineral wool products are based on phenol-formaldehyde. Due to sanitary and environmental considerations and increased focus on indoor air quality, the producers developed new alternative binders. Especially, Knauf Insulation, a worldwide building insulation manufacturer, developed a binder based on plant starch and called ECOSE. In addition of not using added phenol-formaldehyde , this new binder is also supposed to reduce the environmental impacts of Knauf Insulation mineral wools. Moreover, due to its properties, others applications are now considered for ECOSE such as composite wood panels [1]. The aim of this study is to determine the environmental impact of ECOSE and to compare it with more traditional binders using Life Cycle Assessment (LCA) methodology. LCA analyzes the environmental aspects and potential impacts associated with all the stages of a product's life. In this type of environmental assessment the energy and material flows for the entire life-cycle are surveyed and analyzed with special attention to possible environmental hazards or human health problems. The ISO 14040 and 14044 norms [2, 3] provide the general guidance for performing an LCA. The LCA methodology is first applied to ECOSE main component: glucose. The presentation will present results for glucose production from cereals starches After that, first ECOSE application, glass mineral wool products will be presented in details, including production process (see figure 3). The modelling of the glass mineral wool production process in LCA software GaBi 6 [4] is then described. One of the model specificity is that it allows to perform LCA of any glass wool products produced in Knauf Insulation plants in Europe. The adaptations to the model to allow studying former glass wool product when using phenol-formaldehyde binders will also be presented such as the advantages of this model. Moreover, preliminary results about ECOSE and phenol-formaldehyde glass wool products are explained. Références [1] Knauf Insulation. [cited 2014; Available from: http://www.knaufinsulation.ua/en. [2] ISO 14044, Environmental management - Life cycle assessment - Requirements and guidelines. 2006. [3] ISO 14040, Environmental management - Life cycle assessment - Principles and framework. 2006. [4] LBP, University of Stuttgart, and PE INTERNATIONAL AG, GaBI 6. 2012: Leinfelden-Echterdingen. p. GaBi 6: Software and database for life cycle engineering. [less ▲]

Detailed reference viewed: 25 (0 ULg)
Full Text
See detailBelgian children’s and adolescents’ views on the elderly
Flamion, Allison ULg; Missotten, Pierre ULg; Schroyen, Sarah ULg et al

Poster (2015, October 15)

Detailed reference viewed: 19 (6 ULg)
See detail"Lirécrire pour apprendre" : d'un outil d'enseignement à sa mise en oeuvre au 1er degré de l'enseignement secondaire
De Croix, Séverine ULg; Wyns, Marielle

Diverse speeche and writing (2015)

Formation à la mise en oeuvre, dans les classes de 1re secondaire, de l'outil "Lirécrire pour apprendre" (Chaire Lirécrire, Fondation Louvain, UCL). Ce dispositif didactique et pédagogique est centré sur ... [more ▼]

Formation à la mise en oeuvre, dans les classes de 1re secondaire, de l'outil "Lirécrire pour apprendre" (Chaire Lirécrire, Fondation Louvain, UCL). Ce dispositif didactique et pédagogique est centré sur l'enseignement explicite, dans l'ordinaire de la classe, des stratégies de lecture nécessaires à la compréhension des textes et des opérations d'écriture requises pour réussir à l'école. [less ▲]

Detailed reference viewed: 21 (4 ULg)