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See detailL’intention des maitres de stage lié à l’utilisation d’un référentiel de compétences
Detroz, Pascal ULg; Giet, Didier ULg; MASSART, Valérie ULg et al

Conference (2017, October 05)

En s’appuyant notamment sur deux référentiels internationaux : le WONCA tree et le Canmeds une équipe de travail, constituée des enseignants du département de médecine générale de notre institution ... [more ▼]

En s’appuyant notamment sur deux référentiels internationaux : le WONCA tree et le Canmeds une équipe de travail, constituée des enseignants du département de médecine générale de notre institution, accompagnés de 20 médecins en activité, a listé les activités et tâches que devait pouvoir accomplir un clinicien compétent. Ils ont ensuite organisé ces tâches en six grandes catégories. Pour chacune d’elles, une compétence centrale a été identifiée, ainsi qu’une série de familles de situations dans lesquelles cette compétence est mobilisée. Une fois finalisé, le document a été soumis à un panel d’experts de terrain et aux étudiants pour validation afin de s’assurer que le projet soit perçu comme dynamique et mobilisant. Le référentiel terminé, la seconde étape méthodologique a été la reconfiguration de l’enseignement pour qu’il permette l’atteinte des compétences visées. Le problème qui s’est posé à l’équipe enseignante est qu’une partie importante de la formation se fait en dehors des murs de l’université : elle se passe en de nombreux lieux de stage sous la supervision de maîtres de stage, souvent des médecins en activité ayant pour la plupart peu de lien avec la faculté. Afin d’être efficace, il est cependant nécessaire que l’ensemble des intervenants dans la formation des étudiants, y compris ces maîtres de stages, utilise le référentiel de formation comme référent aux activités d’apprentissages proposées aux étudiants. Or, une telle utilisation ne coule pas de source. L’objectif de cette étude est de connaître les intentions des maîtres de stage (MdS) quant à cette utilisation. Afin de connaître les éléments prédicteurs de cette intention, nous avons fait appel à la théorie du comportement planifié (Ajzen, 1985, 1991 ; Ajzen et Fishbein, 2005) pour guider notre démarche. Ce modèle est réputé comme étant le plus puissant pour prédire les comportements. Il a été utilisé dans de très nombreuses études, y compris dans le domaine de la santé. (Reid et Wood, 2008, Hardeman et al, 2002, Stecker, Fortney, Hamilton et Ajzen, 2007)… Selon cette théorie le comportement peut être directement prédit à partir d’une intention et celle-ci est déterminée par trois facteurs. [1] l’attitude envers le comportement [2] La norme subjective et [3] Le contrôle perçu. Conformément à la méthodologie proposée par Ajzen, nous avons dès lors conçu un questionnaire mesurant de manière directe et indirecte les divers paramètres de ce modèle (attitudes, normes sociales et contrôle perçu) sur la base de sept entretiens avec des maîtres de stage. Ce questionnaire a ensuite été proposé à la population des Maitre de Stage. Nous avons obtenu 68 réponses. Après avoir effectué des régressions hiérarchiques pas à pas ascendantes, nous avons conclu qu’ensemble, les attitudes, les normes sociales et le contrôle perçu expliquaient 83 % de l’intention d’utiliser le référentiel. D’autres analyses ont permis de déterminer les leviers et les freins influant directement sur cette intention. Ils seront présentés lors de notre communication. [less ▲]

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Peer Reviewed
See detailValidité et utilité d'un test d'orientation dans le secteur de la santé en Fédération Wallonie Bruxelles
Detroz, Pascal ULg; Monseur, Christian ULg; Romainville, Marc et al

Poster (2017, October 04)

La Fédération Wallonie Bruxelles de Belgique n’avait pas, jusqu’en 2016, de Filtres à l’entrée des études de Médecine. Elle avait par contre un test diagnostique, formatif, obligatoire, mais non ... [more ▼]

La Fédération Wallonie Bruxelles de Belgique n’avait pas, jusqu’en 2016, de Filtres à l’entrée des études de Médecine. Elle avait par contre un test diagnostique, formatif, obligatoire, mais non contraignant (il n'avait pas d'effet sur l'avenir des étudiants). Ce test se présentait sous la forme d’un questionnaire à choix multiple (QCM) évaluant plusieurs matières : la chimie, la physique, la biologie, les mathématiques, le français et l’anglais. Il se déroulait en même temps sur le site des cinq universités concernées par les études dans le domaine de la santé de la FWB. Les questions du test sont identiques dans ces différentes universités. Il a été organisé entre 2013 et 2016 , deux fois par année en juillet et septembre. L’enjeu était de permettre aux étudiants de mesurer leur compétence à l’entrée des études pour se rassurer (pour les plus fort d’entre eux), pour s’améliorer à travers des activités de remédiation, ou éventuellement pour renoncer (pour les pl us faible d’entre eux). La présente étude a pour objet d’évaluer l’efficacité de ce test diagnostic. Concrètement, les objectifs de l'étude décrite étaient de/d’ : 1. Analyser la qualité psychométrique du test d'orientation. 2. Établir le lien entre les données biographiques de l’étudiant et les résultats au test d'orientation. 4. Établir le lien entre les résultats au test d'orientation et l’inscription réelle en faculté de médecine.(l'effet de dissuasion du test) 3. Établir le lien entre le test d'orientation et la réussite globale et par matière à la fin de la première année. Nos conclusions générales sont les suivantes : Les tests d’orientation présentent une bonne qualité psychométrique. C’est toutefois plus vrai pour les disciplines scientifiques que pour l’anglais et le français. Le test vise bien les aptitudes spécifiques et les compétences prérequises pour entreprendre des études supérieures dans le secteur de la santé. Les candidats proviennent d’un milieu socio-économique élevé et présentent un parcours scolaire au dessus de la moyenne. Ces variables expliquent, chez les étudiants diplômés du secondaire en Belgique, plus de 30% de la variance du score de sciences au test d'orientation (score factorisé à partir des scores de maths, bio, chimie et physique) et plus de 10% du score de langue (score factorisé à partir des scores de français et d’anglais) à ce même test. Ces mêmes variables de présage expliquent aussi en partie le résultat en fin de premier bachelier (22% de variance expliquée pour les étudiants diplômés en Belgique, 34% pour les étudiants diplômés en France). Les résultats aux tests d’orientation, quant à eux, expliquent ensemble 29% de la variance aux résultats de bac1 pour les étudiants diplômés en Belgique et 17% pour ceux diplômés en France. Le test de sciences s’avère beaucoup plus prédictif que le test de langues Les test dissuade peu les étudiants les plus faibles de s’inscrire. Ces résultats seront présentés lors de la communication [less ▲]

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See detailBayesian Multi-Objective Optimisation of Neotissue Growth in a Perfusion Bioreactor Set-up
olofsson, Simon; Mehrian, Mohammad ULg; Geris, Liesbet ULg et al

Scientific conference (2017, October 01)

We consider optimising bone neotissue growth in a 3D scaffold during dynamic perfusion bioreactor culture. The goal is to choose design variables by optimising two conflicting objectives: (i) maximising ... [more ▼]

We consider optimising bone neotissue growth in a 3D scaffold during dynamic perfusion bioreactor culture. The goal is to choose design variables by optimising two conflicting objectives: (i) maximising neotissue growth and (ii) minimising operating cost. Our contribution is a novel extension of Bayesian multi-objective optimisation to the case of one black-box (neotissue growth) and one analytical (operating cost) objective function, that helps determine, within a reasonable amount of time, what design variables best manage the trade-off between neotissue growth and operating cost. Our method is tested against and outperforms the most common approach in literature, genetic algorithms, and shows its important real-world applicability to problems that combine black-box models with easy-to-quantify objectives like cost. [less ▲]

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See detailRecent Evolutions and Trends in the Use of Computer Aided Chemical Engineering for Educational Purposes at the University of Liège
Léonard, Grégoire ULg; Belboom, Sandra ULg; Toye, Dominique ULg et al

in Computer Aided Chemical Engineering (2017)

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies ... [more ▼]

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies with the arrival of commercial software is highlighted, as the learning outcomes evolved from the ability of building programs to solve chemical engineering problems towards the ability to use complex commercial software and to understand their limitations. Moreover, CAPE methods were extended to non-dedicated CAPE courses, which is illustrated here by the goals and challenges of their use in courses like “Reactor Engineering” and “Life Cycle Analysis”. It was observed that students sometimes assume that CAPE softwares provide straightforward and trustworthy solutions without the need of understanding their mathematical bases and assumptions. Thus, solutions to make students aware of these limitations are proposed, including the creation of an integrated project focussing on complex multi-disciplinary issues, evidencing the need for critical input from the operator. [less ▲]

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See detailAby Warburg, Textes & Fragments (1926-1929) suivi de "Plasticité du visuel. Montages et usages critiques de l'image chez A. Warburg" (M. Hagelstein)
Hagelstein, Maud ULg; Letawe, Céline ULg

Book published by Presses Universitaires de Liège (2017)

Assorti d’une série de textes inédits, cet ouvrage monographique vise à faire connaître dans le milieu francophone les écrits d’Aby Warburg (1866-1929), en particulier ceux rédigés dans les dernières ... [more ▼]

Assorti d’une série de textes inédits, cet ouvrage monographique vise à faire connaître dans le milieu francophone les écrits d’Aby Warburg (1866-1929), en particulier ceux rédigés dans les dernières années de sa vie. Peu connus, ces textes datent de la période d’élaboration de l’Atlas d’images Mnemosyne – Atlas dont le succès grandissant auprès des artistes et des théoriciens de l’art n’est plus à démontrer . Mais si Mnemosyne attire de plus en plus les spécialistes des images de tous horizons, on accorde encore peu d’intérêt aux textes et aux notes rédigées par son auteur dans les années 1926-1929. Ces textes auraient du accompagner les planches de l’Atlas si le projet avait abouti. Or, les manuscrits inédits conservés au Warburg Institute (Londres) montrent la portée philosophique des recherches tardives d’Aby Warburg. Il y développe une théorie culturelle de l’image pour le moins originale et qui a profondément influencé certaines démarches plus contemporaines (dans les domaines de l’histoire de l’art, de l’anthropologie du visuel, de la Bildwissenschaft allemande ou des Visual Studies anglo-saxonnes). À l’occasion d’un débat avec les pensées de Nietzsche et de Burckhardt, Warburg élabore une conception nouvelle de la Kultur. [less ▲]

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See detailPréserver les derniers hauts-fourneaux wallons (titre provisoire)
Drouguet, Noémie ULg; Bodeux, Philippe

Book published by Urbagora (2017)

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See detailLe Stress Oxydant: arnaque ou biologie d'avenir?
LE GOFF, Caroline ULg

Conference (2017, September 28)

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See detailA mathematical model of respiration under protective ventilation and extracorporeal CO2 removal therapy
Habran, Simon ULg; Desaive, Thomas ULg; MORIMONT, Philippe ULg et al

Conference (2017, September 27)

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must ... [more ▼]

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must be simple enough to provide rapid solutions and to estimate specific parameters from available clinical data. But it also must be complex enough to be able to simulate the respiratory system when protective ventilation is used and when this system is assisted by an ECCO2RD. [less ▲]

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See detailConférence d'ouverture : Sartre, la Conférence de Rome, 1964
Cormann, Grégory ULg; Bourgault, Jean

Conference (2017, September 22)

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See detailPerformance-based fire design and the U.S. prescriptive guidelines: A comparative study
Elhami Khorasani, Negar; Fang, Chenyang; Gernay, Thomas ULg

in Proceedings of the 39th IABSE Symposium (2017, September 21)

Current codes and standards for fire design of structures in the United States are mainly based on design at the component level using prescriptive approaches, while performance-based design for fire can ... [more ▼]

Current codes and standards for fire design of structures in the United States are mainly based on design at the component level using prescriptive approaches, while performance-based design for fire can be used to address the needs for designing modern buildings with cost-effective solutions. Previous research shows that, when system-level performance is considered, fire protection on secondary beam elements in composite steel-concrete floor systems is not necessary due to the development of a membrane action in the concrete slab during fire. This study compares the fire design of a 9-story office building using prescriptive and performance-based designs. The safety levels of the two designs are investigated and compared. It is shown that performance-based design can be used to achieve the required level of safety currently enforced in the U.S. prescriptive guidelines, while providing an opportunity for cost reduction in fire protection material. [less ▲]

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See detailBuckling of steel plates at elevated temperatures: Theory of perfect plates vs finite element analysis
Maraveas, Chrysantos ULg; Gernay, Thomas ULg; Franssen, Jean-Marc ULg

in Proceedings of CONFAB'17 Conference (2017, September 11)

The local buckling capacity of fire exposed thin-walled steel cross sections is affected by the reduction in strength and stiffness due to elevated temperatures and the amplitude of the initial local ... [more ▼]

The local buckling capacity of fire exposed thin-walled steel cross sections is affected by the reduction in strength and stiffness due to elevated temperatures and the amplitude of the initial local imperfections. Several researchers have proposed design methods to calculate the capacity of the plates (i.e. web and flanges) that compose these steel members at elevated temperatures, but they used different shapes of steel plates (sides ratio a/b) and different amplitudes of local imperfections. This variability in hypotheses happens because there is no clear provision defining the numerical modeling procedure for fire design of steel plates in the codes (European or US). According to the theory of perfect plates, the critical load depends of the shape of the rectangular plate (e.g. the sides ratio a/b) and the corresponding buckling mode (number of half waves), the boundary and the loading conditions. This paper reviews the existing code provisions and compares the existing design models and their assumptions for thin-walled steel cross sections. Elements of the theory of perfect plates are presented. Parametric finite element analyses are then conducted on isolated steel plates at elevated temperatures to investigate the effect of the plate shape (a/b ratio) and imperfections (amplitude and number of half wave lengths). From the analysis, the governing parameter will be estimated (a/b vs imperfections) for simulation of isolated flanges and webs. Finally, recommendations for the numerical modeling of steel plates at elevated temperatures are proposed. [less ▲]

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See detailUsing IPCAPS to identify fine-scale population structure
Chaichoompu, Kridsadakorn ULg; Fentaw Abegaz, Yazew ULg; Tongsima, Sissades et al

Poster (2017, September 09)

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See detailComparative fire analysis of steel-concrete composite buildings designed following performance-based and U.S. prescriptive approaches
Elhami Khorasani, Negar; Fang, C.; Gernay, Thomas ULg

in Proceedings of the ASFE '17 Conference (2017, September 08)

Performance-based structural fire design provides a rational methodology for designing modern buildings with cost-effective solutions. However, in the United States, fire design still largely relies on ... [more ▼]

Performance-based structural fire design provides a rational methodology for designing modern buildings with cost-effective solutions. However, in the United States, fire design still largely relies on design at the component level using prescriptive approaches. With performance-based approaches, there is an opportunity to benefit from increased flexibility and reduced cost in the design, but these advantages need to be explicitly described and disseminated to promote this shift in paradigm. In this paper, a comparative analysis is conducted on multi-story steel-concrete buildings designed following performance-based and U.S. prescriptive approaches. The steel-concrete composite structure allows taking advantage of tensile membrane action in the slab during fire, and therefore removing the fire protection on secondary beam elements. The nonlinear finite element software SAFIR is used to model the behavior of the buildings under the standard ASTM fire and a natural fire determined using the two-zone fire model CFAST. The numerical simulations show that performance-based design can be used to achieve the required level of safety currently enforced in the U.S. prescriptive guidelines, while providing an opportunity for cost reduction in fire protection material. [less ▲]

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See detailA method for hybrid fire testing: Development, implementation and numerical application
Sauca, Ana ULg; Mergny, Elke ULg; Gernay, Thomas ULg et al

in Proceedings of ASFE'17 Conference (2017, September 08)

Hybrid Fire Testing (HFT) is a technique that allows assessing experimentally the fire performance of a structural element under real boundary conditions that capture the effect of the surrounding ... [more ▼]

Hybrid Fire Testing (HFT) is a technique that allows assessing experimentally the fire performance of a structural element under real boundary conditions that capture the effect of the surrounding structure. To enable HFT, there is a need for a method that is unconditionally stable, ensures equilibrium and compatibility at the interface and captures the global behaviour of the analysed structure. A few attempts at conducting HFT have been described in the literature, but it can be shown, based on the analytical study of a simple one degree-of-freedom elastic system, that the considered method was fundamentally unstable in certain configurations which depend on the relative stiffness between the two substructures, but which cannot be easily predicted in advance. In this paper, a new method is introduced to overcome the stability problem and it is shown through analytical developments and applicative examples that the stability of the new method does not depend on the stiffness ratio between the two substructures. The new method is applied in a virtual hybrid test on a 2D reinforced concrete beam part of a moment resisting frame, showing that stability, equilibrium and compatibility are ensured on the considered multiple degree-of-freedom system. Besides, the virtual HFT succeeds in reproducing the global behaviour of the analysed structure. The method development and implementation in a virtual (numerical) setting is described, the next step being its implementation in a real (laboratory) hybrid test. [less ▲]

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See detailAdaptive capacity assessment of damselfishes (Pomacentridae)
Gajdzik, Laura ULg

Doctoral thesis (2017)

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See detailEffect of upgrading concrete strength class on fire performance of reinforced concrete columns
Gernay, Thomas ULg; Peric, Vlado; Mihaylov, Boyan ULg et al

in Proceedings of ASFE'17 Conference (2017, September 07)

High strength concrete (HSC) provides several advantages over normal strength concrete (NSC) and is being used in multi-story buildings for reducing the dimensions of the columns sections and increasing ... [more ▼]

High strength concrete (HSC) provides several advantages over normal strength concrete (NSC) and is being used in multi-story buildings for reducing the dimensions of the columns sections and increasing the net marketable area. However, upgrading of concrete strength class in a building may affect the fire performance, due to higher rates of strength loss with temperature and higher susceptibility to spalling of HSC compared with NSC. Reduction of columns sections also leads to increased member slenderness and faster temperature increase in the section core. These detrimental effects are well known, but their impact on fire performance of structures has not been established in terms of comparative advantage between NSC and HSC. In other words, it is not clear whether the consideration of fire resistance limits the opportunities for use of HSC for reducing the dimensions of columns sections in multi-story buildings. This research aims to address this question by comparing the fire behaviour of reinforced concrete columns made of NSC and HSC using nonlinear finite element modelling. The evolution of load bearing capacity of the columns is established as a function of the fire exposure duration. A 15-story car park structure is adopted as a case study with alternative designs for the columns based on strength classes ranging from C30 to C90. Results show that, although the replacement of NSC by HSC accelerates the reduction rate of columns capacity under fire, the columns generally have significant reserves in resistance leading to sufficient fire resistance. This study gives an insight into the impact of replacing stocky sections in NSC by more slender sections in HSC on fire resistance rating for multi-story structures. [less ▲]

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See detailRound table. Quaternary Prevention(P4) or first do not harm.
Jamoulle, Marc ULg; Ouvrard, Patrick; Widmer, Daniel et al

Conference (2017, September 07)

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See detailSensitivity of elevated temperature load carrying capacity of thin-walled steel members to local imperfections
Maraveas, Chrysantos ULg; Gernay, Thomas ULg; Franssen, Jean-Marc ULg

in Proceedings of ASFE'17 Conference (2017, September 07)

The local buckling capacity of fire exposed thin-walled steel cross sections is affected by the reduction in strength and stiffness due to elevated temperatures and by the amplitude of the initial local ... [more ▼]

The local buckling capacity of fire exposed thin-walled steel cross sections is affected by the reduction in strength and stiffness due to elevated temperatures and by the amplitude of the initial local imperfections. Several researchers have proposed design methods to calculate the capacity of these steel members at elevated temperatures, but they used different methodologies and different amplitude of local imperfections in the extensive numerical analyses that are typically at the base of these methods. This variability in hypotheses happens because there is no clear provision defining the local imperfection amplitude for fire design in the codes (European or US). EN 1993-1-5 proposes amplitude values of local imperfections for ambient temperature design, while EN 1090-2 defines a -different- maximum allowed size of fabrication tolerance during production. Meanwhile, other sizes of local imperfections have also been proposed in the literature, with values different than those from EN 1993-1-5 and EN 1090-2. This paper reviews the existing code provisions and compares the existing design models and their assumptions for thin-walled steel cross sections. Finite element analyses are then conducted on isolated steel plates at elevated temperatures to investigate the effect of local imperfections. Finally, specific amplitude of local imperfections is proposed for fire design of thin-walled steel members. [less ▲]

Detailed reference viewed: 35 (4 ULg)