Last 7 days
Bookmark and Share    
Full Text
See detailL'art de la médiation scolaire. Entre ambiguïté et interprétations
Dethier, Baptiste ULiege

Doctoral thesis (2017)

La thèse porte sur la construction de la politique de médiation scolaire menée en Belgique francophone et sa mise en œuvre concrète par de nouveaux agents chargés de l’interpréter : les médiateurs ... [more ▼]

La thèse porte sur la construction de la politique de médiation scolaire menée en Belgique francophone et sa mise en œuvre concrète par de nouveaux agents chargés de l’interpréter : les médiateurs scolaires. Dans un milieu scolaire où les acteurs, internes et externes aux établissements, sont multiples, les médiateurs sont appelés à prendre en charge des problèmes scolaires tels que la violence, le décrochage et l’absentéisme dans un cadre ambigu et, par conséquent, sujet à interprétation. La thèse rend compte du contexte organisationnel dans lequel les médiateurs s’inscrivent et de la mise en œuvre de cette politique. Baptiste Dethier analyse leur travail à l’aide de la métaphore du travail « artistique », c’est-à-dire comme un ensemble de procédures, de connaissances et de règles encadrant l’exercice d’une activité créative. Tout d’abord, cette activité est construite à partir d’orientations de sens – et non de prescriptions – données par l’État, les médiateurs scolaires étant chargés de les interpréter, grâce à une autonomie partiellement contrôlée. Ensuite, ces interprétations sont analysées grâce aux discours des médiateurs, reflétant la forte hétérogénéité dans la mise en œuvre de la politique de médiation scolaire ainsi que les controverses qui animent en permanence la fonction de médiateur. Enfin, à travers l’analyse des pratiques concrètes des médiateurs, il apparaît qu’elles consistent : d’une part, en la création de mises en scène spécifiques destinées à produire chez les bénéficiaires un état particulier de sensibilité ; d’autre part, comme autant de mises à l’épreuve de leur intégrité « artistique » et des principes dont ils se revendiquent. La thèse montre que les médiateurs scolaires se distinguent moins par ce qu’ils font que par la façon dont ils en parlent. Dès lors, la place de la place de la médiation et de la fonction de médiateur dans la division du travail au sein des organisations scolaires est questionnée. Celle-ci s’y trouve éclatée et ambigüe, entre contre-culture bousculant les équilibres historiques du système et participation au maintien de la forme scolaire traditionnelle. [less ▲]

Detailed reference viewed: 27 (5 ULiège)
Full Text
See detailRetours d’expérience d’un partenariat Université - Agences de l'Eau pour une gestion de la qualité des eaux de surface
Deliège, Jean-François ULiege; Everbecq, Etienne ULiege; MAGERMANS, POL ULiege et al

Conference (2017, June 08)

Un partenariat innovant a été établi entre une équipe de recherche universitaire (unité R&D de l’Aquapôle, Université de Liège) et des pouvoirs publics ayant dans leurs attributions la protection des ... [more ▼]

Un partenariat innovant a été établi entre une équipe de recherche universitaire (unité R&D de l’Aquapôle, Université de Liège) et des pouvoirs publics ayant dans leurs attributions la protection des ressources en eau et des milieux aquatiques (Agences de l’Eau françaises, Administrations wallonne et flamande). L’objectif principal de ce partenariat est la gestion des ressources par les Agences et Administrations en les dotant d’un outil innovant et opérationnel d’aide à la décision leur permettant de remplir leurs missions régionales (programmes d’intervention, SDAGE, …), nationales et internationales (DCE, rapportage européen, …). Pour atteindre cet objectif, le partenariat se base sur le développement d’une suite logicielle répondant aux attentes des opérateurs. Cette stratégie de développement, basée sur les besoins des partenaires, est au bénéfice direct de la restauration de la qualité des milieux aquatiques. [less ▲]

Detailed reference viewed: 24 (3 ULiège)
Full Text
Peer Reviewed
See detailCharacterization of the pre-metastatic niche in lymph node, in experimental and clinical settings
Noël, Agnès ULiege; Balsat, Cédric; Garcia Caballero, Melissa et al

Poster (2017, June 08)

Detailed reference viewed: 33 (7 ULiège)
Full Text
Peer Reviewed
See detailFire resistance of concrete slabs acting in compressive membrane action
Molkens, Tom; Gernay, Thomas ULiege; Caspeele, Robby

in Nigro, Emidio; Bilotta, Antonio (Eds.) Proceedings of the 2nd International Fire Safety Symposium - IFireSS 2017 (2017, June 08)

In building renovation, the real behaviour of reinforced concrete slabs cannot always be explained by the bending theory according to classical structural mechanics. Indeed, the bearing capacity, as ... [more ▼]

In building renovation, the real behaviour of reinforced concrete slabs cannot always be explained by the bending theory according to classical structural mechanics. Indeed, the bearing capacity, as assessed for instance by a loading test, sometimes appears to be much higher than what would be expected. This phenomenon may be caused by the activation of an arch-effect or so-called compressive membrane action (CMA) which can develop even with small vertical deformations. For a slab which is completely restrained, the presence of reinforcement becomes of lesser importance when this phenomenon is activated (except for end fields). Hence, for fire resistance purposes, it can be discussed whether reinforcement and concrete cover has a smaller influence on the bearing capacity for slabs subjected to fire which exhibit a significant concrete compressive membrane behaviour. This paper presents a loading test performed on a real concrete building which highlighted the development of CMA as the load bearing mode. It then proposes a strategy to evaluate the behaviour resulting from the development of CMA in reinforced concrete slabs at ambient and at elevated temperature based on numerical modelling. The numerical analyses are performed with the finite element software SAFIR® using a strip of layered shell elements. A plastic-damage constitutive model with an explicit transient creep formulation is used to capture the concrete behaviour at elevated temperature. [less ▲]

Detailed reference viewed: 35 (3 ULiège)
See detailDu plus petit au plus grand
Beckers, Albert ULiege

Scientific conference (2017, June 08)

Detailed reference viewed: 10 (0 ULiège)
Full Text
Peer Reviewed
See detailMolecular surveillance of Plasmodium falciparum resistance to artemisinin-based combination therapies in the Democratic Republic of Congo
Mvumbi Makaba, Dieudonné; Bobanga Lengu, Thierry; Kayembe Ntumba, Jean-Marie et al

in PLoS ONE (2017)

Malaria is a major public health problem in the Democratic Republic of Congo. Despite progress achieved over the past decade in the fight against malaria, further efforts have to be done such as in the ... [more ▼]

Malaria is a major public health problem in the Democratic Republic of Congo. Despite progress achieved over the past decade in the fight against malaria, further efforts have to be done such as in the surveillance and the containment of Plasmodium falciparum resistant strains. We investigated resistance to artemisinin-based combination therapies currently in use in Democratic Republic of Congo by surveying molecular polymorphisms in three genes: pfcrt, pfmdr1 and pfk13 to explore possible emergence of amodiaquine, lumefantrine or artemisinin resistance in Democratic Republic of Congo. This study essentially revealed that resistance to chloroquine is still decreasing while polymorphism related to amodiaquine resistance seems to be not present in Democratic Republic of Congo, that three samples, located in the east of the country, harbor Pfmdr1 amplification and that none of the mutations found in South-East Asia correlated with artemisinine resistance have been found in Democratic Republic of Congo. But new mutations have been identified, especially the M476K, occurred in the same position that the M476I previously identified in the F32-ART strain, strongly resistant to artemisinine. Antimalarial first-line treatments currently in use in Democratic Republic of Congo are not associated with emergence of molecular markers of resistance. [less ▲]

Detailed reference viewed: 21 (3 ULiège)
Full Text
See detailPromouvoir, développer et optimiser les pratiques de feedback formatif en Bloc1 en Faculté d'Architecture - Partage d'expériences
Silvestre, Aude ULiege; Seijkens, Nicolas ULiege

Scientific conference (2017, June 08)

Au cours des quatre dernières années, l’Institut de Formation et de Recherche en Enseignement Supérieur (IFRES) et le Service Guidance Étude (SGE) de l’Université de Liège ont développé et mis en place un ... [more ▼]

Au cours des quatre dernières années, l’Institut de Formation et de Recherche en Enseignement Supérieur (IFRES) et le Service Guidance Étude (SGE) de l’Université de Liège ont développé et mis en place un projet visant à promouvoir et optimiser les pratiques de feedback formatif et d’Assessment for Learning en première année. Le Projet Feedback a été initié en 2013 et poursuivi en 2014 au sein de la Faculté des Sciences appliquées, adapté depuis juin 2014 en Faculté de Droit, de Science Politique et de Criminologie, depuis 2015 en Faculté des Sciences, et depuis 2016 en Faculté d’Architecture. Le projet est mené dans un but de soutien à l’apprentissage et à la qualité de l’expérience vécue par les étudiants de première année. Il vise à engager un groupe d’enseignants en Architecture dans une réflexion portant sur leurs pratiques d’enseignement et d’évaluation, et de potentielles régulations à y apporter. Chacun des participants impliqués est porté à réenvisager certaines dimensions de son enseignement de première année à la lumière des théories se rapportant aux pratiques de feedback lors d’entretiens individuels structurés, avec l’équipe pédagogique encadrante (une référente pédagogique et une architecte), mais également lors de séances plénières collectives. Des initiatives, telles que des tests de prérequis en mathématique, ou une grille de critères pour le dessin ou encore outil réflexif d’aide à la prise de note en atelier de projet, ont été développées dans divers cours (Mathématique ; Théorie de l’Architecture ; Construction et d’Applications Constructives ; Atelier de Projet ; etc.). Parmi la quinzaine d’initiatives élaborées, certaines ont déjà été mises en œuvre, d’autres sont toujours en développement actuellement ou sont en phase de réflexion. L’avis des étudiants est au cœur des préoccupations du Projet Feedback. Plusieurs questionnaires ont été administrés aux étudiants, afin d’investiguer leurs perceptions relatives à diverses initiatives mises en place lors de l’année académique 2016-2017. [less ▲]

Detailed reference viewed: 23 (2 ULiège)
Full Text
See detailExemples tirés de la pratique: les phanères
Hayette, Marie-Pierre ULiege

Conference (2017, June 08)

Detailed reference viewed: 20 (0 ULiège)
Full Text
See detailFatigue resistant designs using stress-based topology optimization
Collet, Maxime ULiege; Bauduin, Simon ULiege; Fernandez Sanchez, Eduardo Felipe ULiege et al

Conference (2017, June 08)

Stress based topology optimization has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements. Fatigue is an important mode of ... [more ▼]

Stress based topology optimization has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements. Fatigue is an important mode of failure in mechanical engineering and accounting for it as soon as the early stage of design using topology optimization sounds primordial. Literature reports many good results for shape optimization [Mrzyglod & Zielinsky(2006)] whereas in the field of topology optimization several authors have shown that considering fatigue in an optimization framework leads to more relevant solutions where fluctuating loads are involved [Holmberg E.(2015), Collet et al(2016), Svärd(2015)]. In order to check the good behavior of the implementation, we first investigate the implementation of an advanced fatigue criterion, i.e. the multiaxial Dang Van criterion [Dang Van et al(1989)], in the framework of a density-based topology optimization problem. The choice of this fatigue criterion is justifed by its good applicability in automotive or aeronautic industry as well as its relevancy with respect to experimental results. We present the sensitivity analysis with stress constraints and present some classical benchmarks to illustrate the behavior of the optimized solution. In a second time, we introduce the fatigue resistance in the well-known microstructural design [Sigmund (1999)]. The new additive manufacturing techniques allow to fabricate components exhibiting architectured materials. In this perspective, ensuring the fatigue resistance of the cellular material will by extension ensure the structural integrity of the overall structure itself. Both types of optimization framework are evaluated in term of their numerical performances and are compared to classical results generated by a regular stress-based topology optimization. Finally, the results are 3D-printed to assess for their manufacturability. [less ▲]

Detailed reference viewed: 18 (4 ULiège)
Full Text
See detailDiametral dimension and property Omega Bar for spaces Snu
Demeulenaere, Loïc ULiege

Conference (2017, June 08)

Spaces Snu are metrizable sequence spaces defined by Jaffard in the context of multifractal analysis and signal treatment. From a functional analysis point of view, the study of these spaces points out ... [more ▼]

Spaces Snu are metrizable sequence spaces defined by Jaffard in the context of multifractal analysis and signal treatment. From a functional analysis point of view, the study of these spaces points out some topological properties, such as the facts they are locally pseudoconvex in general and locally p-convex in certain cases, Schwartz, and non-nuclear. In this talk, we focus on two topological invariants, namely the diametral dimension (Bessaga, Mityagin, Pelczynski, Rolewicz) and the property "Omega Bar" (Vogt, Wagner). Firstly, we revisit a result of Aubry and Bastin giving the diametral dimension of locally p-convex spaces Snu and extend it to some non-locally p-convex spaces Snu. Secondly, we explain how these developments can be used to prove that a subclass of spaces Snu (among which the locally p-convex ones) verifes the condition Omega Bar. [less ▲]

Detailed reference viewed: 19 (2 ULiège)
Full Text
See detailOccurrence and fate of emerging organic contaminants (EOCs) in the aquifers of Barcelona
Jurado Elices, Anna ULiege

Scientific conference (2017, June 07)

Detailed reference viewed: 25 (2 ULiège)
Full Text
Peer Reviewed
See detailFire risk assessment of multi-story buildings based on fragility analysis
Gernay, Thomas ULiege; Elhami Khorasani, Negar; Garlock, Maria

in Nigro, Emidio; Bilotta, Antonio (Eds.) Proceedings of the 2nd International Fire Safety Symposium - IFireSS 2017 (2017, June 07)

Recent efforts aim at assessing the fire performance of structures in a probabilistic framework. But there is still no well-established method to quantify the reliability of entire buildings. Previous ... [more ▼]

Recent efforts aim at assessing the fire performance of structures in a probabilistic framework. But there is still no well-established method to quantify the reliability of entire buildings. Previous works focused on isolated structural members, therefore not allowing for a determination of the global safety level of buildings. Here, a new methodology is developed to quantify the reliability of buildings in fire. The methodology uses Monte Carlo simulations for constructing fragility functions associated with different fire breakout locations in a building, then combines the functions to characterize the overall building conditional probability of failure, and finally incorporates the probabilistic models for intensity measure and fire occurrence likelihood. The methodology is applied to multi-story steel buildings. This work addresses fire reliability at the building scale, and therefore is useful for standardizing safety level as well as for evaluating community resilience. [less ▲]

Detailed reference viewed: 111 (10 ULiège)
Peer Reviewed
See detailProbing Single Molecules with the AFM: Force, Motion, Dynamics, and Function
Duwez, Anne-Sophie ULiege

Conference (2017, June 07)

Detailed reference viewed: 8 (1 ULiège)
Full Text
See detailTopology optimization of mechanical components fabricated by additive manufacturing for a Shell Eco Marathon vehicle
Alarcon Soto, Pablo ULiege; Collet, Maxime ULiege; Bauduin, Simon ULiege et al

Conference (2017, June 07)

Since 2004, a team of students and researchers of University of Liege takes part to the Shell Eco Marathon race with a lightweight electric vehicle. The goal of this pedagogical project is to design ... [more ▼]

Since 2004, a team of students and researchers of University of Liege takes part to the Shell Eco Marathon race with a lightweight electric vehicle. The goal of this pedagogical project is to design, fabricate and operate a vehicle exhibiting the least energy consumption. A key factor to reduce the energy consumption is to minimize the vehicle mass. Besides the body structure made of CRFP, engineers have also to focus on the weight reduction of any mechanical parts of the powertrain, transmission and of rolling gear. The combination of topology optimization with additive manufacturing techniques allows to propose innovative designs exhibiting a high performance to weight ratio. Topology optimized designs are often characterized by a high geometrical complexity that is not possible to manufacture without 3D printing. This work presents the CAE design methodology that was developed to combine topology and shape optimization with 3d printing manufacturing. Novel developments both in shape and topology optimization have also been realized for the specific character of these components. The design methodology is illustrated with several applications of components of our new Eco Marathon prototype. They include a support for electric traction motors and different torque arms of the steering mechanism to be implemented in the new 2017 vehicle. The presentation is going to show the different design steps from the specifications and the formulation of the design problem to the 3D-printing of the parts: the topology optimization, interpretation and CAD reconstruction, shape optimization and detailed finite element verification of the solution. The optimization is performed thanks to the commercial software NX-TOPOL and the final CAD design is reconstructed in the CATIA environment software after a smoothing procedure in the NX-CAD environment. We show that the final design can be 3D-printed and a comparison with a design produced using traditional design approach is provided. [less ▲]

Detailed reference viewed: 21 (5 ULiège)
Full Text
See detailRésultats des élections présidentielles, législatives er tour en France.
Verjans, Pierre ULiege

Conference given outside the academic context (2017)

Que peut-on dire des élections françaises entre les deux tours des législatives? Quelles conséquences imaginables pour le PS à Liège?

Detailed reference viewed: 18 (0 ULiège)
Full Text
See detailRobot control based on human motion analysis with IMU measurements
Pellois, Robin ULiege; Joris, Laura ULiege; Bruls, Olivier ULiege

Scientific conference (2017, June 06)

The measurement of the operator motions can lead to innovation in the field of human-robot collaboration. Motion capture data can be used for robot programming by demonstration as well as controlling and ... [more ▼]

The measurement of the operator motions can lead to innovation in the field of human-robot collaboration. Motion capture data can be used for robot programming by demonstration as well as controlling and adapting robot trajectories. To measure motion, IMUs represent an interesting alternative compared to other sensing technologies such as vision. In order to illustrate this strategy, a demonstrator has been created to command a robot by human motion. Two IMU sensor modules are set on the human arm and forearm. The orientation of the module with respect to the inertial frame is computed by the fusion of accelerometer, magnetometer and gyroscope data. This information coupled with a simple human arm kinematic model is used to compute the wrist trajectory. The accuracy of this measurement has to be quantified. For that purpose, the estimated trajectory based on the IMU measurement is compared to the trajectory measured using a reference 3D optoelectronic motion analysis system (Codamotion, Charnwood Dynamics Ltd) available in the Laboratory of Human Motion Analysis of the University of Li`ege. [less ▲]

Detailed reference viewed: 14 (1 ULiège)