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See detailEco-efficiency optimization of Hybrid Electric Vehicle based on response surface method and genetic algorithm
Nzisabira, Jonathan; Louvigny, Yannick ULg; Duysinx, Pierre ULg

in Proceedings of EET-2008 European Ele-Drive Conference and International Advanced Mobility Forum (2008, March)

The electric vehicles (EV) and sometimes the hybrid electric vehicle (HEV) technologies are environmentally very efficient but can not succeed on the market because of a smaller ability to satisfy ... [more ▼]

The electric vehicles (EV) and sometimes the hybrid electric vehicle (HEV) technologies are environmentally very efficient but can not succeed on the market because of a smaller ability to satisfy customer’s requirements. Comparison of clean technologies in automotive and transportation systems has been measured using different analysis tools such as LCA (life cycle analysis). However, these instruments never account for the user’s satisfaction which partly explains the market acceptance problems. The Eco efficiency is a global index which accounts for both environment impacts and user satisfaction. The main objective of vehicle powertrain hybridization is to improve the fuel consumption and environment pollutants impact (Eco-score) without decreasing the vehicle performances and other user satisfaction criteria. The objective of this study is to minimize the Eco-score indicator of HEV with respect to the user satisfaction criteria. The approach is formulated as a multidisciplinary optimization problem. At first the EV or HEV are modeled and simulated using ADVISOR (advanced vehicle simulator) with respect to several driving situations. Then emissions can be determined and the Ecoscore indicator can be calculated. User Satisfaction can be evaluated based on performance criteria extracted from ADVISOR simulation and on simple evaluation tools relying on the state-of-the art of technological information for safety, reliability and daily cost. In this study the design problem is stated as follows: select mechanical and electric components (like engine, motor and battery sizes) to minimize the Ecoscore indicator and to maximize user satisfaction criteria subject to catalogue constraints on the choice of the components. The approach is illustrated on applications dealing with parallel hybrid electric vehicles. [less ▲]

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See detailEco-ethological aspects of two natural hybrids involving Abramis brama (L.), of the River Meuse basin (Belgium) and implications in ecosystem management.
Nzau Matondo, Billy ULg; Ovidio, Michaël ULg; Philippart, Jean-Claude ULg et al

Conference (2009, September)

Eco-ethology as expressed in migration patterns, hybridisation level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream ... [more ▼]

Eco-ethology as expressed in migration patterns, hybridisation level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream Abramis brama × roach Rutilus rutilus and common bream × silver bream Blicca bjoerkna hybrids. From 2001 to 2003, hybrids and parental species were captured in a fish pass trap at the Lixhe dam on the Belgian Meuse River during their reproductive migration. The fish pass was checked 3 days a week and the water temperature was recorded hourly. The results showed that these hybrids were less frequent but they had migrated during the same period and in the same environmental conditions as the parental species. Scale readings showed that the growth of hybrids was intermediate between the two parent species’ growth. In controlled environments, the female hybrid mated with one to two males, including male hybrids, in reproductive experiments between hybrids; they also mated with male hybrid and male roach or male silver bream, but without the male common bream in reproductive experiments with hybrids mixed with parental species males, in a succession of spawning episodes recognised in parental species. Aggressive and territorial acts were observed among the males of these hybrids in a territory including a spawning substrate. This study has proven that these natural hybrids are eco-ethologically viable. For the management of fish populations and aquatic environments, the hybridisation process can be considered an indicator of habitat degradation. This degradation can then be interrupted by preserving spawning sites, controlling the restocking and species introduction, restoring habitats, and preserving the obstruction of fish migration. [less ▲]

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See detailEco-ethological characteristics of two natural hybrids of Abramis brama (L.) from the River Meuse basin
Nzau Matondo, Billy ULg; Ovidio, Michaël ULg; Poncin, Pascal ULg et al

in Environmental Biotechnology (2010), 6(2),

Eco-ethology as expressed in migration patterns, abundance level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream x roach ... [more ▼]

Eco-ethology as expressed in migration patterns, abundance level, growth rates in river conditions, and reproductive behaviour in a controlled environment were investigated in natural common bream x roach and common bream x silver bream hybrids. From 2001 to 2003, hybrids and parental species were captured in a fish pass trap at the Lixhe dam on the Belgian Meuse river during their reproductive migration. The fish pass was checked 3 days a week and the water temperature was recorded hourly. The results showed that hybrids were less frequent but they had migrated during the same period and in the same environmental conditions as the parental species. Scale readings showed that the growth of hybrids was intermediate to the two parent species growth. In reproductive experiments between hybrids under controlled conditions, the female hybrid mated with one to two hybrid males. In reproductive experiments with hybrids mixed with parental species males, the female hybrid mated with male hybrid and male roach or male silver bream, but not with the male common bream. The succession of spawning episodes in hybrids were those recognised in parental species. Aggressive and territorial acts were observed among the males of these hybrids in a territory including a spawning substrate. This study has proven that the natural hybrids are eco-ethologically viable. [less ▲]

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See detailÉco-éthologie d’une population de vipères péliades (Vipera b. berus L.) dans une région de bocage du sud-ouest de la Belgique
Graitson, Eric ULg

in Bulletin de la Société Herpétologique de France (2008), 128

the preference of adders for different linear elements of the ‘bocage’, a farmland landscape crisscrossed by hedges, was studied during 2.5 years in south-West Belgium. Most individuals occurred in South ... [more ▼]

the preference of adders for different linear elements of the ‘bocage’, a farmland landscape crisscrossed by hedges, was studied during 2.5 years in south-West Belgium. Most individuals occurred in South-facing woody hedges between the autumn and the beginning of spring. During the mating period, by contrast, most individuals tended to shift of habitat and favoured 1 to 2 m wide grassy hedges with a limited shrub cover and a north-south orientation. Mating females especially favoured this latter habitat, probably because of their specific micro-climatic conditions, including a higher insulation. A few individuals, however, remained in the same habitat all year round. The identification of individuals, which was performed on the basis of features including body and head color patterns, but not on individual clipping, proved to be difficult owing to the high density of individuals. Linear elements in the form of grassy hedges, not very space-consuming, can shelter very high densities of snakes. in the context of a sharp decrease of the bocage landscape, the conservation of common European vipers relies on the maintenance of such linear landscape elements as grassy and shrubby hedges, which can be enhanced by the implementation of recent measures aiming at restoring extensive agricultural systems. [less ▲]

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See detailEco-éthologie de la population de bonobos récemment découverte dans l’ouest de la République Démographique du Congo
Serckx, Adeline ULg; Huynen, Marie-Claude ULg; Beudels-Jamar, Roseline

Conference (2009)

The bonobo, Pan paniscus, an endemic primate of the DRC, forms with the chimpanzee, Pan troglodytes, the pair of species closest to humans. Classified as “Endangered” by the IUCN, it’s seriously ... [more ▼]

The bonobo, Pan paniscus, an endemic primate of the DRC, forms with the chimpanzee, Pan troglodytes, the pair of species closest to humans. Classified as “Endangered” by the IUCN, it’s seriously threatened by the degradation of the forests. Only the creation of protected areas large enough and properly managed can improve its status but requires a good knowledge of the eco-ethology of the local populations. Our project will focus on studying a bonobo population recently discovered in the region of the Lake Tumba, in the west of the DRC. It is characterized by densities never encountered elsewhere, and a preliminary study has revealed significant differences in habitat and food resources in comparison to these of eastern populations. We will contribute to a recently established WWF conservation program by gathering eco-ethological data on bonobos, data that will allow identifying areas to protect, their boundaries and management measures to implement. To do this, we will study the diet of bonobos via direct and indirect observations of their behavior. We will also study the party size and its composition and identify underlying environmental factors. We will assess the bonobos’ home range size and pattern of displacement, which we will correlate with the abundance of food resources to determine whether there is a pattern of occupation of time and space specific to this population. [less ▲]

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See detailEco-éthologie des populations pédomorphiques du Triton alpestre
Denoël, Mathieu ULg

Conference (2001)

La pédomorphose est un processus évolutif impliquant la rétention de caractères larvaires chez l’adulte reproducteur. Chez les salamandres et les tritons, la pédomorphose peut être facultative. Ainsi ... [more ▼]

La pédomorphose est un processus évolutif impliquant la rétention de caractères larvaires chez l’adulte reproducteur. Chez les salamandres et les tritons, la pédomorphose peut être facultative. Ainsi, dans une même population, alors que certaines larves atteignent la maturité tout en conservant leurs attributs larvaires (fentes branchiales, branchies), d’autres se métamorphosent en juvéniles qui atteindront leur maturité en phase terrestre avant de retourner à l’eau. Il s’agit ainsi de ce que certains dénomment une néoténie. La coexistence des deux formes alternatives adultes – les pédomorphes et les métamorphes – offre dès lors la possibilité d’examiner l’aspect adaptatif du polymorphisme et de valider les hypothèses évolutives relatives à la pédomorphose. A cette fin, plusieurs populations pédomorphiques du triton alpestre (Triturus alpestris) de France, d’Italie et de Grèce ont été étudiées entre 1996 et 2000. Un accent particulier a été mis dans la détermination des structures d’âge, du régime alimentaire et de l’occupation de l’espace. Des expériences de laboratoire ont également permis d’analyser la performance de la structure trophique des tritons et de caractériser l’effet de paramètres environnementaux sur la pédomorphose. Ces analyses montrent que les deux formes alternatives ont des structures d’âge similaires dans certaines populations (processus néoténique) alors que les pédomorphes acquièrent leur maturité plus précocement que les métamorphes dans d’autres populations (processus progénétique). La progenèse était observée dans des milieux instables. Le régime alimentaire des deux formes différait nettement dans trois lacs alpins. Les pédomorphes se comportaient comme des planctonophages tandis que les métamorphes ingéraient dans l’eau des proies exogènes au milieu aquatique. L’occupation de l’habitat n’était pas identique. La différence de régime peut être expliquée par une différence de performance de leur structure trophique : les pédomorphes étant plus performants dans la capture du plancton tandis que les métamorphes, eux, le sont dans la capture d’invertébrés terrestres. Les expériences de laboratoire ont aussi montré que l’absence de proies et l’assèchement du milieu induisaient la métamorphose. En conclusion, la pédomorphose facultative offre différents avantages qui ne sont pas nécessairement identiques dans tous les milieux. Elle est adaptative en conférant une maturité précoce dans des milieux imprévisibles et une utilisation optimale des ressources dans des habitats hétérogènes. Un tel processus est également un polyphénisme permettant un changement de tactique (métamorphose) en cas de détérioration de l’habitat. [less ▲]

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See detailEco-Ethology of bonobos, Pan paniscus, in West Democratic Republic of Congo: why are such data so important for long-term conservation programs?
Serckx, Adeline ULg; Huynen, Marie-Claude ULg; Beudels-Jamar, Roseline

in American Journal of Primatology (2011), 73

Endemic to the Democratic Republic of Congo (DRC) and classified as Endangered by IUCN, the Bonobo survival depends exclusively on management measures taken by a country having to deal concomitantly with ... [more ▼]

Endemic to the Democratic Republic of Congo (DRC) and classified as Endangered by IUCN, the Bonobo survival depends exclusively on management measures taken by a country having to deal concomitantly with several problems affecting its development. The current government’s intention to designate new protected areas need to be complemented by effective long-term conservation programs, taking into account both bonobos populations requirements and local socio-economic realities. As part of a WWF conservation program, our study focuses on recently discovered Bonobo populations in West RDC, an eccentric location of the species range. The region is characterized by numerous anthropogenic activities including logging and cattle ranching and is composed of forest-savannah mosaics in which Bonobo has hardly ever been studied in comparison with those evolving in central DRC rainforests. Preliminary observations already indicate that these Western populations differ from other known populations in terms of habitat use, with regular savannahs patches crossing and savannah fruits consumption. To shed further lights on species adaptation’s spectrum, our study investigates local population density; nesting sites choice; and diet composition. Here we present a baseline population density derived from 5 walks along transects using marked-nest count method and we discuss factors inducing nesting sites choice. Ultimately, our results should allow for the formulation of specific management recommendations to be used in regional conservation program. [less ▲]

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See detailEco-Ethology of bonobos, Pan paniscus, in West Democratic Republic of Congo; why are critical data so important for long-term conservation programs?
Serckx, Adeline ULg; Huynen, Marie-Claude ULg; Beudels-Jamar, Roseline

Conference (2011)

The Bonobo could be one of the species facing the biggest conservation challenge in the years to come. Endemic to the West Democratic Republic of Congo (DRC), its survival depends exclusively on the ... [more ▼]

The Bonobo could be one of the species facing the biggest conservation challenge in the years to come. Endemic to the West Democratic Republic of Congo (DRC), its survival depends exclusively on the management measures taken by a country having to deal concomitantly with many problems affecting its development, i.e. demographic explosion, poverty, insecurity and deforestation. But the survival of bonobos, classified as Endangered by IUCN (2010) and restricted to a relatively small range, will require newly designated and effective protected areas. This will imply long-term conservation programs, taking into account the bonobos’ populations requirements, as well as the local socio-economic needs and realities. In 2005, a large population of bonobos has been identified in Western DRC, in a rather eccentric part of the species range compare with the best known populations inhabiting the rainforest of center DRC. The Western region, known as the Lake Tumba Landscape, is characterized by a relatively poor rural human population, an active bushmeat trade, and is divided into several logging concessions and cattle ranches. In 2007, WWF initiated a vast conservation program in the area, including an eco-tourism project involving the habituation of 2 bonobos populations. Until now, only sparse information has been gathered but preliminary studies indicate that habitat use by bonobos – a forest-savannah mosaic – differs substantially from that of other known populations. The objective of the research is to define the eco-ethological profile of those 2 populations. For this purpose, we will characterize diet and food preferences, examine population density and try to identify factors inducing nesting sites’ choice. This information will help understanding habitat use by bonobos in the Western region, and should allow us to come up with specific management measures to be adopted by logging concessions, WWF and ICCN as part of the region’s conservation program. [less ▲]

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See detailThe eco-neighborhoods, an alternative to urban sprawl?
Halleux, Jean-Marie ULg

Conference (2012, May 10)

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See detailLes éco-quartiers : vers la généralisation d'une alternative à l'étalement urbain ?
Halleux, Jean-Marie ULg; Strée, Julie ULg

in Harismendy, P.; Gaudin, S. (Eds.) Habitat social, habitat durable ? (2012)

Il existe de nombreuses formes de blocages susceptibles de limiter la reproductibilité des expériences d’éco-quartiers, par exemple en termes de maîtrise foncière ou par la nécessité pour des acteurs de ... [more ▼]

Il existe de nombreuses formes de blocages susceptibles de limiter la reproductibilité des expériences d’éco-quartiers, par exemple en termes de maîtrise foncière ou par la nécessité pour des acteurs de la construction de sortir de leurs démarches traditionnelles. Notre recherche s’est focalisée sur un aspect à la fois partiel et essentiel de la problématique, en l’occurrence les préférences résidentielles. Nous avons, pour ce faire, réalisé une enquête sur le potentiel commercial de la formule de l’éco-quartier. Cette enquête, conduite par la méthode de l’évaluation contingente, s’est focalisée sur les ménages qui alimentent le peuplement des banlieues périurbaines. Pour le contexte investigué - la Wallonie - et pour le proche futur, il ressort de l'enquête que l’éco-quartier ne va pas conduire à des effets significatifs sur l’endiguement de la périurbanisation. Répondre par la négative quant à la possibilité d’endiguer l’étalement urbain par la multiplication des projets d’éco-quartiers ne signifie pas pour autant que cette formule ne puisse pas jouer un rôle significatif dans la production immobilière future. Si l’on cherche à donner une estimation crédible quant à la demande susceptible de choisir la formule de l’éco-quartier plutôt que la formule du lotissement périurbain, nos résultats poussent à avancer l’ordre de grandeur des 10 %. [less ▲]

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See detailEco-zonings : compte-rendu de la recherche CPDT 2009-2010
Van Der Kaa, Claire ULg

Conference (2010, November 09)

Dans le cadre d'une recherche exploratoire, le concept d'éco-zoning est encadré par comparaison à des concepts similaires présents dans la littérature, des études de cas et des rencontres avec les parties ... [more ▼]

Dans le cadre d'une recherche exploratoire, le concept d'éco-zoning est encadré par comparaison à des concepts similaires présents dans la littérature, des études de cas et des rencontres avec les parties prenantes. puis une définition en est formulée. La mise en oeuvre coordonnée de mesures d'aménagement et d'urbanisme, de management environnemental et d'écologie industrielle est préconisée pour contribuer à une plus grande durabilité des zones d'activité économique. Une structure d'évaluation des zones d'activité économique est élaborée. [less ▲]

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See detailEcobilan azoté et émission de vapeur d'eau lors d'élevage de porcelets sevrés sur litière accumulée de sciure
Nicks, Baudouin ULg; Vandenheede, Marc ULg; Desiron, Alain et al

in compte rendu du cinquième carrefour des productions animales "quels systèmes de productions animales pour le 21è siècle?" (2000)

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See detailL'écobilan de l'exploitation agricole
Debouche, Charles ULg; Lambin, Jean

Conference (2002, June)

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See detailL'écobilan de l'exploitation agricole
Debouche, Charles ULg

Scientific conference (2000, October 16)

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See detailEcobilan de l'exploitation agricole: Manuel d'utilisation
Debouche, Charles ULg; Lambin, Jean

Report (1999)

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See detailEcoFerme: un logiciel d'évaluation environnementale de l'exploitation agricole
Debouche, Charles ULg

in Les Nouvelles de l'été (2003), (3e trimetre), 14-15

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