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See detailL'art de gouverner les déchets hautement radioactifs. Analyse comparée de la Belgique, la France et le Canada
Parotte, Céline ULg

Doctoral thesis (2016)

Comment l'art de gouverner les déchets hautement radioactifs, tel qu'il a évolué au cours des deux dernières décennies, a-t-il redéfini les enjeux sociotechniques du programme de gestion des déchets ... [more ▼]

Comment l'art de gouverner les déchets hautement radioactifs, tel qu'il a évolué au cours des deux dernières décennies, a-t-il redéfini les enjeux sociotechniques du programme de gestion des déchets hautement radioactifs et réciproquement? Telle est la question qui traverse cette thèse. Combinant l'analytique de gouvernement (Dean 2010) à une approche co-productionniste forte (Joly 2015), trois régimes de pratiques de gouvernement, en France, en Belgique et au Canada sont scrutés et comparés. Cet écrit propose de suivre l'objet, en cinq chapitres, depuis sa définition (au travers des systèmes de classification), en passant par l’élaboration, la mise en oeuvre territoriale et l'évaluation régulière de son programme de gestion. Chemin faisant, nous cherchons à comprendre comment le dépôt géologique est resté l’option de référence clef pour la catégorie "déchet hautement radioactif". Différentes co-productions seront mises à jour révélant l'asymétrie de pouvoir entre les acteurs, la trajectoire (dis)continue du programme et le caractère expérimental de l’art de gouverner les déchets hautement radioactifs. Un art expérimental, dont nous soutenons que les formes peuvent varier, entre autres, selon l'attitude des expérimentateurs. [less ▲]

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See detailGeneralized Pascal triangles and binomial coefficients of words
Stipulanti, Manon ULg

Poster (2016, December 01)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word. Similarly to the Sierpinski gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. From the extended Pascal triangle obtained when p is equal to 2, we derive a sequence of which we study the regularity and the asymptotic behavior of the summatory function. Inspired from this regularity, we extend our results to another famous numeration systems, namely the Zeckendorff numeration system. [less ▲]

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See detailASSURANCE QUALITE et RECHERCHE …
Hubert, Philippe ULg

Scientific conference (2016, December 01)

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See detailAspects du bilinguisme à Rome
Rochette, Bruno ULg

Conference (2016, December 01)

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See detailHidden Hunger: Seeking Solutions with Staple Crops
Vanderschuren, Hervé ULg

Scientific conference (2016, December 01)

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See detailHistoire politique de la construction européenne
Grandjean, Geoffrey ULg

Learning material (2016)

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See detailNutritional Composition and Rearing Potential of the Meadow Grasshopper (Chorthippus parallelus Zetterstedt)
Paul, Aman ULg; Frederich, Michel ULg; Uyttenbroeck, Roel ULg et al

in Journal of Asia-Pacific Entomology (2016), 19(4), 1111-1116

Insects, particularly those belonging to the family Acrididae (grasshoppers), are commonly consumed as human food in many parts of the world. Grasshoppers of the species Chorthippus parallelus are ... [more ▼]

Insects, particularly those belonging to the family Acrididae (grasshoppers), are commonly consumed as human food in many parts of the world. Grasshoppers of the species Chorthippus parallelus are abundantly found throughout Europe. However, these insects were not consumed by Europeans till now, but could possibly be used as human food, which is why we investigated their chemical composition. We found that they contain high level of proteins (69%), with an excellent amino acid profile and protein digestibility (97%). Furthermore, specimens of C. parallelus have an interesting fatty acids profile and minerals composition. Preliminary toxicity assessment indicates that these insects do not exhibit toxicity towards neutrophil cells (white blood cells). These data suggest that C. parallelus could be considered for human consumption. Rearing trials done during the study show that commercial rearing could be developed to produce sufficient biomass for sustaining human consumption. [less ▲]

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See detailValidity and reliability of the French translation of the VISA-A questionnaire for Achilles tendinopathy
Kaux, Jean-François ULg; Delvaux, François ULg; Oppong-Kyei, Julian et al

in Disability & Rehabilitation (2016), 38(26), 2593-2599

Purpose The Victorian Institute of Sport Assessment – Achilles tendinopathy questionnaire (VISA-A) evaluates the clinical severity of Achilles tendinopathy. The aim of this study was to translate the VISA ... [more ▼]

Purpose The Victorian Institute of Sport Assessment – Achilles tendinopathy questionnaire (VISA-A) evaluates the clinical severity of Achilles tendinopathy. The aim of this study was to translate the VISA-A into French and to study the reliability and validity of this French version, the VISA-AF. Method The VISA-A was translated into French to produce the VISA-AF using a validated methodology in six steps. Thereafter, several psychometric properties of this French version such as test–retest reliability, internal consistency, construct validity and floor and ceiling effects were evaluated. Therefore, we recruited 116 subjects, distributed into 3 groups: pathological patients (n¼31), at-risk athletes (n¼63) and healthy people (n¼22). Results The final version of the VISAAF was approved by an expert committee. On a scale ranging from 0 to 100, the average scores of the VISA-AF obtained were 59 (± 18) for the pathological group, 99 (± 1) for the healthy group and 94 (± 7) for the at-risk group. The VISA-AF shows excellent reliability, low correlations with the discriminant subscales of the SF-36 and moderate correlations with the convergent subscales of the SF-36. Conclusions The French version of the VISA-A is equivalent to its original version and is a reliable and valid questionnaire for French-speaking patients with Achilles tendinopathy. [less ▲]

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See detailTriclosan exposure results in alterations of thyroid hormone status and retarded early development and metamorphosis in Cyprinodon variegatus
Schnitzler, Joseph ULg; Frederich, Bruno ULg; Dussenne, Mélanie ULg et al

in Aquatic Toxicology (2016), 181

Thyroid hormones are critically involved in somatic growth, development and metamorphosis of vertebrates. The structural similarity between thyroid hormones and triclosan, an antimicrobial compound widely ... [more ▼]

Thyroid hormones are critically involved in somatic growth, development and metamorphosis of vertebrates. The structural similarity between thyroid hormones and triclosan, an antimicrobial compound widely employed in consumer personal care products, suggests triclosan can have adverse effects on the thyroid system. The sheepshead minnow, Cyprinodon variegatus, is now used in ecotoxicological studies that have recently begun to focus on potential disruption of the thyroid axis by endocrine disrupting compounds. Here, we investigate the in vivo effects of exposure to triclosan (20, 50, and 100 μg L−1) on the thyroid system and the embryonic and larval development of C. variegatus. Triclosan exposure did not affect hatching success, but delayed hatching time by 6–13 h compared to control embryos. Triclosan exposure affected the ontogenetic variations of whole body thyroid hormone concentrations during the larval phase. The T3 peak around 12–15 dph, described to be indicative for the metamorphosis climax in C. variegatus, was absent in triclosan-exposed larvae. Triclosan exposure did not produce any deformity or allometric repatterning, but a delayed development of 18–32 h was observed. We conclude that the triclosan-induced disruption of the thyroid system delays in vivo the start of metamorphosis in our experimental model. We observed a global developmental delay of 24–45 h, equivalent to 4–7% prolongation of the developmental time in C. variegatus. The costs of delayed metamorphosis can lead to reduction of juvenile fitness and could be a determining factor in the outcome of competitive interactions. [less ▲]

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See detailShort-lived subduction and exhumation in Western Papua (Wandamen peninsula): Co-existence of HP and HT metamorphic rocks in a young geodynamic setting
François, Camille ULg; de Sigoyer, Julia; Pubellier, Manuel et al

in Lithos (2016), 266-267

Understanding processes of formation of accretionary wedges requires studying young and well preserved examples. The Lengguru wedge (West Papua) is younger than 10 Myr and is a result of oblique and fast ... [more ▼]

Understanding processes of formation of accretionary wedges requires studying young and well preserved examples. The Lengguru wedge (West Papua) is younger than 10 Myr and is a result of oblique and fast subduction (11cm/yr) of the Bird’s Head (a part of the Australian margin beneath the Melanesian Arc). Thus, the rapid formation of this wedge (actually a Fold and Thrust Belt) may be attributed to a single tectonic event. High pressure (HP) metabasic and metasedimentary rocks have been discovered in the core of the wedge in the Wandamen peninsula. Locally, these rocks are overprinted by migmatization during the decompression. Field relationships indicate that migmatites and anatectic leucogranite crosscut the HP metamorphic rocks. This paper reports characterization of petrology and thermobarometry of metasediments and metabasic samples, all included in a former mélange-type rock association, as well as geochronology of metasediments. Pressure-Temperature (PT) conditions highlight two stages of metamorphism within a small time bracket. In metasediments, a first stage of relatively HP (~13-17 kbar) is observed as attested by a first paragenesis of garnet-kyanite-phengite. Garnet, kyanite and phengite are then destabilized in favor of biotite during the decompression (5-12 kbar and > 550°C). Late fractures filled with chlorite and a second generation of white mica crosscut the foliation (< 7 kbar and 500-600°C). In metabasic rocks, the peak of pressure is reached from 15 to 23 kbar and from 525 to 650°C. Geochronological study was conducted using U-Pb dating (LA-MC-ICPMS) on zircons from the metasedimentary and migmatitic rocks. Some zircon cores often present high Th/U ratio typical for magmatic origin, as confirmed by trace element signature of metasediments, and recorded ages older than 300 Ma, witness of the activity of a volcanic arc on the former margin of the Australian craton. Most others zircons presents a low Th/U ratio attesting their metamorphic origin, confirmed by inclusions of kyanite. The metamorphic zircons are dated between 5.61 ± 0.04 Ma and 8.1 ± 1.1 Ma. These very young metamorphic ages attest for a rapid subduction and exhumation event. [less ▲]

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See detailMachine Learning based Prediction of Internet Path Dynamics
Wassermann, Sarah ULg; Casas, Pedro; Donnet, Benoît ULg

in ACM CoNEXT Student Workshop: Irvine 12 décembre 2016 (2016, December)

We study the problem of predicting Internet path changes and path performance using traceroute and machine-learning techniques. Path changes are frequently linked to path inflation and performance ... [more ▼]

We study the problem of predicting Internet path changes and path performance using traceroute and machine-learning techniques. Path changes are frequently linked to path inflation and performance degradation. Therefore, predicting their occurrence could improve the analysis of path dynamics using traceroute. By relying on neural networks and using empirical distribution based input features, we show that we are able to predict (i) the remaining life time of a path before it actually changes, and (ii) the number of path changes in a certain time slot with relatively high accuracy. We also show that it is possible to predict path performance in terms of latency, opening the door to novel, machine-learning-based approaches for RTT prediction. [less ▲]

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See detailIncentives and barriers to environmental inequality mobilization: A case-study analysis in Wallonia, Belgium
Lejeune, Zoé ULg; Teller, Jacques ULg

in Environmental Science and Policy (2016), 66

Environmental inequality scholarship has sought to shed light on the unequal environmental conditions borne by poor people and racial minorities, and to challenge public policies. Most studies are ... [more ▼]

Environmental inequality scholarship has sought to shed light on the unequal environmental conditions borne by poor people and racial minorities, and to challenge public policies. Most studies are concerned either with assessing the unequal distribution of environmental amenities and disamenities or with exploring the theoretical foundations of environmental justice movements. We propose an original approach to environmental inequality, focused not only on the unequal distribution of environmental burdens but also on two other types of factors: the capacity to mobilize and engage in community organizations on the one hand and the spatial dimension of environmental inequalities on the other. The evidence for this study is from an opinion survey carried out in 2012 with 1298 individuals. We use a two-step cluster analysis method to compute a classification system based on four categories of variables: socio-economic, environmental, spatial, and social capital. [less ▲]

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See detailRéforme du bonus logement et instauration du Chèque habitat en Wallonie
Voisin, Fanny ULg

in Les Echos du Logement (2016), 118

Description technique de la réforme du bonus logement entreprise en Région wallonne pour les contrats d’emprunt hypothécaire conclus au plus tard le 31 décembre 2015 et pour les contrats d’emprunt ... [more ▼]

Description technique de la réforme du bonus logement entreprise en Région wallonne pour les contrats d’emprunt hypothécaire conclus au plus tard le 31 décembre 2015 et pour les contrats d’emprunt hypothécaire conclus à partir du 1er janvier 2016. [less ▲]

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See detailImpact de l’érosion sur l’envasement des barrages, la recharge des nappes phréatiques côtières et les intrusions marines dans la zone semi-aride méditerranéenne : cas du barrage de Boukourdane (Algérie)
Tadrist, Nassima ULg; Debauche, Olivier

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20(4), 453-467

Description of the subject. Water erosion is a particularly important issue, especially in the Mediterranean and semi-arid zone. This zone is characterized by irregular rainfall patterns, which have a ... [more ▼]

Description of the subject. Water erosion is a particularly important issue, especially in the Mediterranean and semi-arid zone. This zone is characterized by irregular rainfall patterns, which have a considerable influence on soil loss. In mountainous areas, water erosion phenomena are accentuated by steep slopes and low ground cover. The dams draining these areas undergound siltation linked to significant erosion. The silting of the dams drastically limits their capacity and thus their operating life. When used for recharging aquifers, the resuspension of fine particles may accumulate in the recharge areas and reduce infiltration capacity by clogging soil porosity. This leads to a significant reduction of groundwater levels. Additionally, groundwater situated in the coastal zone is submitted to intensive pumping. These two phenomena make groundwater particularly sensitive to marine intrusions. Objectives. This article aims, on the one hand to quantify the rate of siltation in the case of the Boukourdane dam (northern Algeria), which is used to recharge groundwater. On the other hand, the article also shows the reduction in permeability in the capturing field with the current management of releases. Method. Solid rates were set in relation to the liquid flow and sediment concentration occasionally taken from the wadi. The relation established made it possible to evaluate the solid contributions to the dam of Boukourdane. The impact of the releases on recharging the well field was evaluated by grouping wells and the well field mushrooms using heuristic k-means. Regressions were applied to the piezometric variations of each group. Results. This dam is fed by a catchment area of 156 km². Sediment transport was estimated from empirical formulas. The specific degradation rate was estimated at 366 t.km-2.year-1 during the 1993 to 2005 period. The increase in the frequency of extreme rainfall resulted in an increase in the soil erosion rate to 446 t.km-2.year-1 during the 1993 to 2013 period. The volume of sediments accumulated in the dam reached 8.104 m³.year-1 and 11.104 m³.year-1 respectively during these two periods. Conclusions. A change in the management of current releases has a positive impact on the partial restoration of the hydraulic conductivity and de facto, on the fight against marine intrusion. [less ▲]

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See detailApplication of Uncoupled Damage Models to Predict Ductile Fracture in Sheet Metal Blanking
Canales Cardenas, Cristian ULg; Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in Key Engineering Materials (2016), 725

The use of uncoupled damage models has been widely used over the years for the prediction of ductile fracture in engineering applications. Nevertheless, its applicability in the prediction of failure has ... [more ▼]

The use of uncoupled damage models has been widely used over the years for the prediction of ductile fracture in engineering applications. Nevertheless, its applicability in the prediction of failure has been shown to be limited in the wide range of loading conditions encountered in different manufacturing processes. In order to enhance the formulation of former damage models, the Lode angle has been recently used to characterize the stress states along with the stress triaxiality. This new family of damage models has been demonstrated to give excellent results when proportional loading paths are considered, but its efficiency in more complex applications still need further analysis. To this end, a comparative study of former and recently developed uncoupled damage models is performed in this work. The identification of material parameters is done considering simple mechanical tests under different conditions. Then, the models are used to predict the onset and propagation of cracks during blanking, where numerical predictions are compared with experimental results. Finally, the selected damage models presented a remarkable overall performance in the range of clearances under study. [less ▲]

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See detailDeep Reinforcement Learning Solutions for Energy Microgrids Management
François-Lavet, Vincent ULg; Taralla, David; Ernst, Damien ULg et al

in European Workshop on Reinforcement Learning (EWRL 2016) (2016, December)

This paper addresses the problem of efficiently operating the storage devices in an electricity microgrid featuring photovoltaic (PV) panels with both short- and long-term storage capacities. The problem ... [more ▼]

This paper addresses the problem of efficiently operating the storage devices in an electricity microgrid featuring photovoltaic (PV) panels with both short- and long-term storage capacities. The problem of optimally activating the storage devices is formulated as a sequential decision making problem under uncertainty where, at every time-step, the uncertainty comes from the lack of knowledge about future electricity consumption and weather dependent PV production. This paper proposes to address this problem using deep reinforcement learning. To this purpose, a specific deep learning architecture has been designed in order to extract knowledge from past consumption and production time series as well as any available forecasts. The approach is empirically illustrated in the case of a residential customer located in Belgium. [less ▲]

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See detailTarification en assurance non vie et probabilité de ruine
Esch, Louis ULg

Scientific conference (2016, December)

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See detailDroit européen de la concurrence - European competition law
Van Cleynenbreugel, Pieter ULg

Learning material (2016)

This document contains the course plan and readings for an intensive course on European Competition Law taught at the Université Paris-Dauphine in December 2016.

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See detailExplain Your Thesis in Three Minutes
Kreusch, Marie ULg

Article for general public (2016)

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See detailTrophic specializations of damselfishes are tightly associated with reef habitats and social behaviours
Gajdzik, Laura ULg; Parmentier, Eric ULg; Sturaro, Nicolas ULg et al

in Marine Biology (2016), 163

Despite the increasing need to understand factors shaping community assembly, few studies have simultaneously explored the influence of niche-based and phylogenetic processes. Here, we investigate the ... [more ▼]

Despite the increasing need to understand factors shaping community assembly, few studies have simultaneously explored the influence of niche-based and phylogenetic processes. Here, we investigate the relationships between diet, habitat and social behaviour in damselfishes (Pomacentridae) collected in 2014 at Moorea Island (17°30′S, 149°50′W), French Polynesia. Isotope ratios of carbon and nitrogen, in association with stomach contents, delineate three trophic groups: pelagic feeders consuming zooplankton, benthic feeders mainly grazing on algae and an intermediate group feeding on prey from the whole bentho-pelagic compartment. Sulphur isotope ratios indicate segregation between species of the outer reef mostly depending on oceanic input of zooplankton and the lagoonal species relying on locally produced resources or even on terrestrial supply. We demonstrate a tight association between dietary specializations, habitat characteristics and social behaviours, and these correlations are further confirmed by integrating the phylogeny of Pomacentridae. We also provide evidence of phylogenetic conservatism for the stomach content and the habitat–behaviour characters. However, the isotopic trait is evolutionarily more labile probably because it thoroughly depicts the ecological niche of species. To summarize, pelagic feeders (mainly from the Chrominae) usually form shoals in areas close to the open ocean at a maximum depth of 20 m. Benthic feeders (well represented in the Stegastinae) are ubiquitous, solitary and mostly territorial species found at various depths. The intermediate group includes gregarious species from three subfamilies that forage in the lagoon usually above 12 m depth. Overall, we give insight into processes that have structured the damselfish community in Moorea. [less ▲]

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