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See detailEmergence d’une Politique de la Ville en Wallonie en regard de la vision européenne
Mercenier, Chloé ULiege; Bianchet, Bruno ULiege; Ruelle, Christine ULiege et al

Conference (2017, July 06)

The aim of our presentation is to present some issues for Wallonia regarding to the urban strategy of European Union (European Council of Ministers and European Commission). We present these two ... [more ▼]

The aim of our presentation is to present some issues for Wallonia regarding to the urban strategy of European Union (European Council of Ministers and European Commission). We present these two strategies: the European (Urban Agenda/Pact of Amsterdam) and the Walloon strategies. We focus our communication on two regional specific issues: cooperation between municipalities ("supracommunalité") and the rehabilitation of residential and economic functions of urban neighbourhoods. [less ▲]

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See detailActive Healthy Kids Belgium 2016 Report Card on Physical Activity for Children and Youth
Seghers, Jan; Wijtzes, Anne I; De Ridder, Karin A.A. et al

Scientific conference (2017, July 06)

The 2016 Belgium Report Card on Physical Activity for Children and Youth is the first systematic evaluation of physical activity (PA) behaviors, related health behaviors, health outcomes, and influences ... [more ▼]

The 2016 Belgium Report Card on Physical Activity for Children and Youth is the first systematic evaluation of physical activity (PA) behaviors, related health behaviors, health outcomes, and influences thereon, using the Active Healthy Kids Canada grading framework. A research working group consisting of PA experts from both Flanders and Wallonia collaborated to determine the indicators to be graded, data sources to be used, and factors to be taken into account during the grading process. Grades were finalized after consensus was reached among the research working group and 2 stakeholder groups consisting of academic and policy experts in the fields of PA, sedentary behavior, and dietary behavior. Eleven indicators were selected and assigned the following grades: Overall PA (F+), Organized Sport Participation (C-), Active Play (C+), Active Transportation (C-), Sedentary Behaviors (D-), School (B-), Government Strategies and Investment (C+), and Weight Status (D). Incomplete grades were assigned to Family and Peers, Community and the Built Environment, and Dietary Behaviors due to a lack of nationally representative data. In conclusion, despite moderately positive social and environmental influences, PA levels of Belgian children and youth are low while levels of sedentary behaviors are high. [less ▲]

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See detailIntegrated continuous flow photoreactors: Photooxidation of (L)-methionine with singlet oxygen
Emmanuel, Noémie ULiege; Monbaliu, Jean-Christophe ULiege

Conference (2017, July 06)

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side ... [more ▼]

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side-reactions or product degradation due to overexposure. The recent implementation of photochemical processes in microreactors under continuous-flow conditions appeared to be much more powerful than its batch analogue in terms of irradiation efficiency and light penetration. Furthermore, the fine control of residence time ensures an accurate control of the irradiation time, avoiding side-reactions and degradation. The scalable photooxidation of (L)-methionine with singlet oxygen using Rose Bengal as a sensitizer was successfully implemented in a microreactor setup and led to total and selective conversion into methionine sulfoxide, an important building block for the organic synthesis of peptides or functionalized amino acid. The reaction was performed in less than 1 min while the same reaction in batch took 2 h. Other substrates as α-terpinene or citronellol were also photooxidized into high added value compounds using the same conditions. [less ▲]

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See detailLANDSLIDE SUSCEPTIBILITY PREDICTION IN A MOUNTAINOUS CATCHMENT: THE NARANJO BASIN, WESTERN GUATEMALA
Estrada Orozco, Nick Kenner ULiege

Doctoral thesis (2017)

In tropical mountain areas, landslides triggered by heavy rainfall represent a natural hazard, especially where meteorological events such as tropical cyclones are recurrent. Rainfall-triggered landslides ... [more ▼]

In tropical mountain areas, landslides triggered by heavy rainfall represent a natural hazard, especially where meteorological events such as tropical cyclones are recurrent. Rainfall-triggered landslides may also increase in highly seismic active areas. This is the case of Guatemala, located in the Circum-Pacific Belt and between Pacific and Atlantic Oceans, sources of cyclonic events. Although Guatemala is a region where landslides are a widespread phenomenon, landslide inventories, maps and quantitative susceptibility assessments that are useful for land use planners and decision makers are hitherto non-existent. The aim of this research is to produce quantitative landslide susceptibility assessments, using logistic regression multivariate statistical method. The study area is a watershed located in the department of San Marcos (western Guatemala), impacted by a tropical storm event in October 2005. A total of 766 landslides were identified and mapped using orthoimages from 2005. Then, 99 landslides were mapped in 2011 based on field data. The main landslide type is shallow landslide (61 % in 2005), while 39 % of those landslides from 2005 evolved into debris flows. In total, susceptibility models using multivariate probabilistic approach were developed for shallow landslides, evaluating two different strategies for the sample size of non-landslides events and three different numbers of input variable in the models. Susceptibility models were developed for debris flows dataset and the union of both dataset (shallow and debris flows). The comparison of the models and the associated susceptibility maps highlighted 6 significant input variables that are associated with landslide occurences - elevation, slope, aspect, profile curvature, planform curvature and distance to roads. Performance comparisons of models were also carried out. To validate the performance of the model results, the ROC curve was used, as well as the four-fold and confusion matrix plots. A susceptibility map was generated to display the results of the models in terms of probability values. A proposal and discussion on the operational use of susceptibility maps where cutoff values can be chosen to define the lowest and highest landslide susceptibility were also made. These will help land use planners in decision-making and in implementing protective measures. [less ▲]

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See detailVers une Politique de la Ville en Wallonie : recommandation pour la mise en oeuvre d'une politique transversale et intégrée de dynamisation des quartiers urbains
Mercenier, Chloé ULiege; Ruelle, Christine ULiege; Bastin, Florine et al

E-print/Working paper (2017)

La note de recherche propose les principaux résultats de la recherche CPDT 2015-2016 sur la Politique de la Ville en Wallonie. Elle concerne, plus précisément, les constats et recommandations pour le ... [more ▼]

La note de recherche propose les principaux résultats de la recherche CPDT 2015-2016 sur la Politique de la Ville en Wallonie. Elle concerne, plus précisément, les constats et recommandations pour le développement des quartiers urbains selon trois grandes catégories de difficultés : le cadre de vie dégradé, le contexte social défavorable et le contexte économique défavorable. [less ▲]

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See detailHow are youth philanthropy practices transforming the philanthropic field?
Dessy, Elodie ULiege; Xhauflair, Virginie ULiege

Conference (2017, July 05)

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See detailUn dispositif de formation initiale des enseignants en didactique des mathématiques au niveau du secondaire supérieur en Belgique francophone
Balhan, Kevin ULiege; Gérard, Isaline; Nguyen, Giang et al

Conference (2017, July 05)

L'article présenté lors du symposium fédère plusieurs recherches menées dans notre laboratoire de didactique des mathématiques : le « Ladimath », autour de la formation initiale des enseignants de ... [more ▼]

L'article présenté lors du symposium fédère plusieurs recherches menées dans notre laboratoire de didactique des mathématiques : le « Ladimath », autour de la formation initiale des enseignants de mathématique au niveau du lycée et, plus particulièrement, autour d’une question de recherche qui concerne une dimension particulière de la « réflexivité » : « les mathématiques comme problème professionnel ». Nous y décrivons le dispositif mis en place dans la formation initiale des enseignants en mathématique à l’Université de Liège, celui-ci étant alimenté de différentes manières selon l’épistémologie du savoir mathématique questionné lors de la formation. Dans cet article, nous l’illustrons sur trois thèmes différents : celui de l’analyse mathématique, de la géométrie, et des probabilités/statistiques. [less ▲]

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See detailConditions, apports et limites du e-tutorat dans un dispositif de formation hybride
Denis, Brigitte ULiege

in Rinaudo, Jean-Luc (Ed.) Symposium du REF - Téléprésence en éducation (2017, July 04)

Un des enjeux de la formation à distance en formation d’adultes est de mettre en place des dispositifs répondant aux besoins des apprenants, respectant des principes andragogiques et procurant un ... [more ▼]

Un des enjeux de la formation à distance en formation d’adultes est de mettre en place des dispositifs répondant aux besoins des apprenants, respectant des principes andragogiques et procurant un environnement de qualité pédagogique (activités, ressources...) et ergonomique. De plus, le tutorat est un facteur primordial dans la mise en œuvre de tels dispositifs. Procurant un sentiment de présence (Jacquinot, 2002), fournissant un soutien (socio-affectif, cognitif, organisationnel...) à l’apprenant, il influence sa persévérance et l’atteinte de ses objectifs. Cette étude traite de la médiation entre e-tuteurs et apprenants dans un dispositif de formation hybride (certificat d'université en gestion de dispositifs techno-pédagogiques innovants). La mise en place de ce dernier a impliqué d’une part un processus d’ingénierie pédagogique incluant une médiatisation des savoirs (ressources) et des activités à distance (consignes, outils de communication, de dépôt de travaux, etc.) et, d’autre part, un processus d’ingénierie tutorale (Rodet, 2010). Les e-tuteurs ont été formés (Denis, 2003) et se sont accordés sur leur profil d’interventions vis-à-vis des apprenants. En outre, des réunions de concertation ont été organisées à plusieurs reprises durant la formation afin de réguler, au besoin, les interventions tutorales. Le principe de ce dispositif est de s’ancrer dans le projet personnel du participant. Il prévoit au fil de la formation des interactions régulières entre un e-tuteur et son (ses) tutoré(s) sur base d’un carnet de route (Roadbook) hebdomadaire complété en ligne. Ces interactions ont généralement lieu par courriel ou via l’annotation de documents partagés. Par ailleurs, les tutorés reçoivent également de la part des formateurs des feedback écrits personnalisés au fur et à mesure de la rentrée de leurs travaux. Ces derniers, ainsi que leurs réflexions tout au long du processus de formation, sont compilés dans leur Roadbook. Les conditions, apports et limites du e-tutorat dans ce dispositif seront appréhendées à partir de l’analyse des Roadbooks des apprenants et d’interviews de l’un d’entre eux ainsi que des e-tuteurs. [less ▲]

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See detailUnsteady pressure distributions on a 4:1 rectangular cylinder: comparison of numerical and experimental results using decomposition methods.
Guissart, Amandine ULiege; Andrianne, Thomas ULiege; Dimitriadis, Grigorios ULiege et al

Conference (2017, July 04)

Detached flows around bluff bodies are ubiquitous in civil engineering applications. In this work, the flow around a static 4:1 rectangular cylinder at moderate Reynolds number and at different angles of ... [more ▼]

Detached flows around bluff bodies are ubiquitous in civil engineering applications. In this work, the flow around a static 4:1 rectangular cylinder at moderate Reynolds number and at different angles of incidence is studied using both Experimental Fluid Dynamics (EFD) and Computational Fluid Dynamics (CFD). Typically, the integration of EFD and CFD allows a better understanding of the flow of interest by leveraging the complementary of their respective outputs. However, the comparison of computational and experimental results is an important but difficult step of this integration, particularly in the case of local quantities related to unsteady flows. In this work, decomposition methods are used to compare unsteady loads and pressure distributions coming from EFD and CFD. In particular, Proper Orthogonal Decomposition (POD) and Dynamic Mode Decomposition (DMD) are used to extract the dominant structures of the aerodynamic coefficients. The experimental data are obtained from dynamic pressure measurements in wind tunnel while numerical data come from two-dimensional unsteady Reynolds-Averaged Navier-Stokes (uRANS) simulations and tri-dimensional Delayed-Detached Eddy Simulations (DDES). This work shows that the decomposition methods represent a powerful tool enabling the analysis and the quantitative comparison of the main spatial and temporal characteristics of unsteady flows. Moreover, the accuracy of uRANS and DDES results is analyzed in light of the capacity of both CFD techniques to capture the reattachment occurring on the upper part of the rectangular cylinder. [less ▲]

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See detailEffect of Organic Solvents on Microalgae Growth, Metabolism and Industrial Bioproduct Extraction: A Review
Miazek, Krystian ULiege; Kratky, Lukas; Sulc, Radek et al

in International Journal of Molecular Sciences (2017)

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See detailFor your ka! How to give something as a present to the tomb owner?
Motte, Aurore ULiege

Conference (2017, July 04)

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See detailMaximal voluntary isometric contraction tests for normalizing surface EMG of scapular stabilizers muscles
Schwartz, Cédric ULiege; Tubez, François ULiege; Soulier, Maxime et al

Conference (2017, July 04)

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See detailUsing amino acid stable isotopes to estimate trophic position
Sturaro, Nicolas ULiege

Conference (2017, July 04)

Estimating the trophic positions of animals in food webs is useful in addressing many fundamental ecological and ecotoxicological questions. These estimates are generally based on gut content and stable ... [more ▼]

Estimating the trophic positions of animals in food webs is useful in addressing many fundamental ecological and ecotoxicological questions. These estimates are generally based on gut content and stable isotope analyses, which have become essential tools for ecotoxicologists. While these tools have proven their usefulness, they involve several pitfalls that can result in large errors in the estimation of animals’ trophic positions. Relatively recently, these tools were improved with the analysis of the compound-specific amino acid nitrogen stable isotopes. The approach is based on the fact that certain amino acids (e.g., glutamic acid) exhibit metabolic isotope fractionation and others (e.g., phenylalanine) are incorporated into the tissues of consumers in a conservative manner. Indeed, amino acids of the latter category exhibit only a small change in their nitrogen isotope composition, which is similar to that found in primary producers. Therefore, the trophic position of an animal species is estimated based on a comparison of the nitrogen isotope composition of these two groups of amino acids from a single organism. This lecture will try to show the potential of the compound-specific stable isotope analysis of amino acids to illustrate food-web structure and estimate trophic positions in wild animal populations. It will summarize recent advances from field and laboratory studies and present case studies taken from the aquatic environment. In addition, this lecture will discuss the benefits, current limitations and analytical challenges related to this approach, which continues to open new research routes in many fields of ecology, including ecotoxicology. [less ▲]

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See detailLes relations de pouvoir dans l’accompagnement des demandeurs d’emploi par les intermédiaires privés de l’emploi
Gérard, Julie ULiege

Conference (2017, July 04)

Cette contribution s’intéresse à la mise en oeuvre de l’accompagnement des demandeurs d’emploi, en tant que politique sociale visant la (ré)insertion socioprofessionnelle des personnes éloignées de ... [more ▼]

Cette contribution s’intéresse à la mise en oeuvre de l’accompagnement des demandeurs d’emploi, en tant que politique sociale visant la (ré)insertion socioprofessionnelle des personnes éloignées de l’emploi par une lutte contre le chômage de longue durée et l’exclusion sociale. Plus précisément, elle porte un intérêt singulier aux relations de pouvoir qui s’exercent, dans les échanges et les interactions, entre les intermédiaires privés du marché du travail et leurs usagers, dès la phase de sélection des projets d’accompagnement. Cette contribution s’attèle dès lors à rendre compte des formes de contrôle qu’exercent les intermédiaires privés dans la concrétisation de leur action d’insertion lorsqu’ils sont contraints de respecter les orientations européennes en matière de profilage. Elle repose, par conséquent, sur l’analyse des ressorts et des effets de pouvoir en considérant l’influence de pressions institutionnelles induites par le contexte de rationalisation et d’efficacité à l’intérieur duquel la prise en charge des demandeurs d’emploi est réalisée.Ce faisant, cette contribution s’attache à illustrer l’influence de l’action d’intermédiation exercée sur les transitions des demandeurs d’emploi par la présence de deux effets de trappe, étayés par l’activation de mécanismes de filtrage à différents moments de l’accompagnement. Par ce biais, elle vise à rendre compte de la logique structurelle qui oriente les transitions professionnelles des usagers vers une forme de « précariat social » sur le marché du travail. Elle s’appuie, pour ce faire, sur une recherche empirique de nature qualitative, menée entre septembre 2013 et juin 2015, en Belgique Francophone, auprès de six structures privées spécialisées dans l’accompagnement vers et dans l’emploi. [less ▲]

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