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See detailBacteria, bonds between classical karsts and karsts in silicated non carbonated rocks ?
Willems, Luc ULg

Poster (2014, June)

For several years, similar karsts to those found in the limestone have been observed in various silicated non-carbonated rocks. Several morphological arguments show that a complete dissolution of rocks is ... [more ▼]

For several years, similar karsts to those found in the limestone have been observed in various silicated non-carbonated rocks. Several morphological arguments show that a complete dissolution of rocks is necessary to explain the formation of some caves and other related forms independently of hydrotermalisme phenomena. However, the physico-chemical processes generally considered do not provide a satisfactory explanation to this dissolution. Bacterial activity found deep in many lithologies provides a solution to this apparent contradiction. [less ▲]

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See detailThe composition of cuticular compounds indicates body parts, sex and age in the model butterfly Bicyclus anynana (Lepidoptera)
Heuskin, Stéphanie ULg; Vanderplanck, Maryse; Bacquet, Paul et al

in Frontiers in Ecology and Evolution (2014), 2:37

Chemical communication in insects’ sexual interactions is well-known to involve olfaction of volatile compounds called sex pheromones. In theory, sexual chemical communication may also involve chemicals ... [more ▼]

Chemical communication in insects’ sexual interactions is well-known to involve olfaction of volatile compounds called sex pheromones. In theory, sexual chemical communication may also involve chemicals with low or no volatility exchanged during precopulatory gustatory contacts. Yet, knowledge on this latter type of chemicals is so far mostly restricted to the Drosophila fly model. Here we provide the most comprehensive characterization to date of the cuticular chemical profile, including both volatile and non-volatile compounds, of a model butterfly, Bicyclus anynana. First, we characterized the body distribution of 103 cuticular lipids, mostly alkanes and methyl-branched alkanes, by gas chromatography coupled to mass spectrometry (GC-MS). Second, we developed a multivariate statistical approach to cope with such complex chemical profiles and showed that variation in the presence or abundance of a subset of the cuticular lipids indicated body parts, and traits involved in B. anynana mate choice, namely sex and age. Third, we identified the chemical structure of the 20 most indicative compounds, which were on average more abundant (1346.4 ± 1994.6 ng; mean ± SD) than other, likely less indicative, compounds (225.9 ± 507.2 ng; mean ± SD). Fourth, we showed that wings and legs displayed most of the chemical information found on the entire body of the butterflies. Fifth, we showed that non-random gustatory contacts occurred between specific male and female body parts during courtship. The body parts mostly touched by the conspecific displayed the largest between-sex differentiation in cuticular composition. Altogether, the large diversity of cuticular lipids in B. anynana, which exceeds the one of Drosophila flies, and its non-random distribution and evaluation across individuals, together suggest that gustatory information is likely exchanged during sexual interactions in Lepidoptera. [less ▲]

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See detailResearch of phosphate accumulating microorganisms from WWTPs for the recovery of phosphorus from organic wastes (3BV.3.47)
Tarayre, Cédric ULg; Michels, Evi; Buysse, Jeroen et al

Poster (2014, June)

Many wastes containing reusable components, such as nitrogen, phosphorus and potassium, are not exploited through ideal processes. As an example, in Wallonia (Belgium), the main treatment applied to ... [more ▼]

Many wastes containing reusable components, such as nitrogen, phosphorus and potassium, are not exploited through ideal processes. As an example, in Wallonia (Belgium), the main treatment applied to sewage sludge consists in incinerating the material. Such a process is chosen when the heavy metals are too concentrated in the sludge, preventing an agricultural use. However, sewage sludge, as well as manure, slurry and digestate, contain notable amounts of nutrients (nitrogen, phosphorus and potassium). Some Waste Water Treatment Plants (WWTPs) are actually designed in order to promote Phosphate Accumulating Organisms (PAOs), able to store or release phosphorus in accordance with the environmental conditions. The aim of this work is to isolate PAOs from WWTPs and evaluate their applicability to phosphorus recovery from organic wastes. Metagenomics and metabolic properties are also considered. This work is supported by the BioRefine Project, a European project in which various member states focus on recovery of inorganics from organic wastestreams. [less ▲]

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See detailCité du Bernalmont
Frankignoulle, Pierre ULg

in Charlier, Sébastien (Ed.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailMaison Bosny
Frankignoulle, Pierre ULg

in Charlier, Sébastien, Moor, Thomas (Ed.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailRésidence Georges Simenon
Frankignoulle, Pierre ULg

in Charlier, Sébastien; Moor, Thomas (Eds.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailChômeur Blaster, jeu vidéo liégeois créé en atelier
Hurel, Pierre-Yves ULg

Article for general public (2014)

"Chômeur Blaster, jeu vidéo conçu à Liège par une dizaine de néophytes en programmation, se situe à la croisée du jeu vidéo traditionnel et du serious game militant. Il prend au premier degré la « chasse ... [more ▼]

"Chômeur Blaster, jeu vidéo conçu à Liège par une dizaine de néophytes en programmation, se situe à la croisée du jeu vidéo traditionnel et du serious game militant. Il prend au premier degré la « chasse aux chômeurs » pour la dénoncer. Explications de Pierre-Yves Hurel, animateur du premier atelier Média dédié au jeu de l'association d'éducation permanente D'une Certaine Gaieté." [less ▲]

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See detailQuartier-jardin de Sainte-Walburge
Frankignoulle, Pierre ULg

in Charlier, Sébastien; Moor, Thomas (Eds.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailRésidence Elysée
Frankignoulle, Pierre ULg

in Charlier, Sébastien; Moor, Thomas (Eds.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailRésidence rue Devaux
Frankignoulle, Pierre ULg

in Charlier, Sébastien; Moor, Thomas (Eds.) Guide Architecture moderne et contemporaine 1895-2014. Liège . (2014)

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See detailQuality assessment of marketed eggs in Eastern Algeria
Kara Ali, Monira; Ait Kaki, Asma ULg; Milet, Asma et al

in Nature & Technologie (2014), 11(2), 52-58

The objective of this study was to compare eggs quality between industrial and local chickens in four departments of Eastern Algeria (Bejaia, Jijel, Mila and Setif). A total of 4748 eggs were bought from ... [more ▼]

The objective of this study was to compare eggs quality between industrial and local chickens in four departments of Eastern Algeria (Bejaia, Jijel, Mila and Setif). A total of 4748 eggs were bought from three marketing channels as following: shops (1184), public markets (2757) and supermarkets (807). The percentage of stained eggs was significantly different (P<0.001) between industrial (15.25%) and local eggs (27.61%). A significant difference (P<0.05) was observed between industrial and local egg weight (61.01 vs 53.28g), egg shell weight (7.10 vs 6.30g), albumen weight (37.44 vs 29.69g), albumen percentage (61.34 vs 55.71%), shell thickness (0.381 vs 0.325mm). However, yolk weight (6.10 vs 6.30g), yolk percentage (27.06 vs 32.44%), shell percentage (11.60 vs 11.89%), yolk/albumen ratio (0.44 vs 0.58), albumen height (5.27 vs 5.93mm), Haugh unit (69.12 vs 77.80), yolk color (9.52 vs 10.94) and egg price (7.67 vs 12.84DA) of local chicken were significantly (P<0.01) higher than in the case of industrial hen. Marketing channels affected significantly (P<0.01) egg weight, yolk weight, albumen weight, albumen height and price of a total studied eggs. Egg weight (59.03g) and egg price (10.87DA) from supermarkets were the highest. Eggs of local hens presented according to the national preference, interesting quality criteria such as freshness, yolk/albumen ratio and yolk color. [less ▲]

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See detailBridging the gap between Do-It-Yourself urban practices and urban systems
Farah, Jihad ULg; Cabrera Quispe, Juan Edson ULg; Teller, Jacques ULg

Conference (2014, June)

In contemporary fragmented cities, DIY urbanism is seen as a way to insure inclusiveness and cohesion by mobilizing citizens and improving urban space. However, the capacity of DIY to go beyond local ... [more ▼]

In contemporary fragmented cities, DIY urbanism is seen as a way to insure inclusiveness and cohesion by mobilizing citizens and improving urban space. However, the capacity of DIY to go beyond local epiphenomena and contribute to a systemized way of city making is still an open question that is gaining increasing interest in literature and practice. In this article, we differ from answers provided in the literature to this question in that we are interested in the ways DIY practices could contribute to build from the bottom-up large-scale territories. We rely on Lévy-Strauss oppositions of the bricoleur vs. the engineer and the “savage” vs. the scientist to stress that DIY is instrumental and political. This leads us to consider DIY as a process of problem-solving and domos building where the operational and socio-spatial aspects of DIY are intrinsically linked and evolving together. It is by understanding both these aspects that we can understand the possibilities of, and limitations facing, the development of DIY on a larger territorial scale. We build on case studies in Cochabamba, Bolivia and Beirut, Lebanon. We argue that though it is possible to succeed to build on DIY to develop local territories and rely on these experiences to trace larger ones, the operational and political modes would invariably move towards more top-down comprehensive engineer-like approaches. [less ▲]

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See detailMaitriser le temps? L'accélération du traitement judiciaire du divorce en France et en Belgique
Bastard, Benoit; Delvaux, David ULg; Mouhanna, Christian et al

in Temporalités : Productions, Usages, Figures : Revue de Sciences Sociales et Humaines (2014), 19

Cet article aborde la question du temps dans l’institution judiciaire en prenant pour objet le contentieux familial. En considérant la dimension temporelle du règlement des conflits qui émergent lors des ... [more ▼]

Cet article aborde la question du temps dans l’institution judiciaire en prenant pour objet le contentieux familial. En considérant la dimension temporelle du règlement des conflits qui émergent lors des ruptures d’union, il met en évidence le changement radical de la vision du temps qui a touché le monde de la justice civile dans les dernières décennies. Le mouvement d’accélération qui touche l’ensemble de l’institution judiciaire se trouve redoublé dans ce champ par l’urgence qu’impose la réaction face à un contentieux de masse : il s’agit de répondre sans délais aux conflits familiaux, selon des modalités adaptées aux besoins des intéressés. L’étude s’appuie sur une enquête réalisée dans cinq juridictions, en France et en Belgique. Dans ces deux pays, les dernières réformes intervenues ont eu pour projet de hâter les procédures de divorce. Dans la pratique, différentes modalités de l’accélération du traitement judiciaire sont observées. En France, le juge aux affaires familiales est un acteur central qui traite l’ensemble des ruptures de couple soumises à la justice. Les JAF font tout pour accélérer les décisions, en s’appuyant autant que faire se peut sur l’accord des parties et en cherchant à contrôler les avocats. En Belgique, l’accélération est particulièrement apparente s’agissant du procès en divorce, mais les décisions sur les effets accessoires de la séparation sont renvoyées à différentes instances ayant leur propre temporalité. Par-delà ces différences, la comparaison suggère que l’accélération du traitement du contentieux de la famille résulte de la coprésence des deux tendances majeures observées, la managérialisation de la justice et le renvoi des décisions relatives à la famille vers les intéressés eux-mêmes. L’accélération du traitement judiciaire du divorce n’est cependant pas sans conséquence : en particulier, elle rend plus apparente la disjonction du temps du procès et de celui que vivent les conjoints en rupture. [less ▲]

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See detailSynthèse bibliographique : l'écologie larvaire des culicoïdes (Diptera : Ceratopogonidae)
Zimmer, Jean-Yves ULg; Haubruge, Eric ULg; Francis, Frédéric ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2014), 18(2), 301-312

Cet article présente une synthèse de l’écologie larvaire des culicoïdes (Diptera : Ceratopogonidae) en vue de rassembler les connaissances, souvent très parsemées, des sites d’oviposition et des habitats ... [more ▼]

Cet article présente une synthèse de l’écologie larvaire des culicoïdes (Diptera : Ceratopogonidae) en vue de rassembler les connaissances, souvent très parsemées, des sites d’oviposition et des habitats larvaires actuellement identifiés à travers le monde pour les principales espèces de culicoïdes. Ces moucherons piqueurs hématophages sont impliqués dans la transmission de divers parasites (protozoaires et filaires) et virus aux animaux. Le développement larvaire des culicoïdes est généralement optimal dans les substrats humides et riches en débris organiques divers. Cependant, chaque espèce présente ses propres exigences écologiques et se trouve par conséquent dans des micro-habitats spécifiques. Dans cette synthèse, les gites larvaires sont répartis en substrats aquatiques et semi-aquatiques d’eau douce et d’eau salée ou saumâtre, substrats terrestres et substrats anthropiques liés à l’élevage. Les gites larvaires de nombreuses espèces appartenant au genre Culicoides Latreille demeurent cependant encore méconnus. La connaissance de ces derniers et leur caractérisation sont pourtant essentielles pour permettre la mise au point de stratégies de lutte efficaces contre ces insectes vecteurs, permettant ainsi de renforcer la vaccination du bétail et les autres moyens de lutte mis en oeuvre. Les habitats larvaires actuellement identifiés pourraient permettre d’orienter les investigations des recherches écologiques futures et les propositions de contrôle de ces moucherons vecteurs. [less ▲]

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See detailGeometric parameters influence on Piano Key Weir hydraulic performances
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Pirotton, Michel ULg et al

in Chanson, Hubert; Toombes, Luke (Eds.) Hydraulic Structures and Society – Engineering Challenges (2014, June)

The Piano Key Weir is a recent evolution of the traditional labyrinth weir. Thanks to a reduced foot print, this nonlinear weir can be placed on the top of gravity dams. The Piano Key Weir geometry ... [more ▼]

The Piano Key Weir is a recent evolution of the traditional labyrinth weir. Thanks to a reduced foot print, this nonlinear weir can be placed on the top of gravity dams. The Piano Key Weir geometry involves a large number of geometric parameters. Several experimental studies have been carried out to investigate the main geometric parameters influencing the weir hydraulic efficiency and to define their optimal value. In this paper, the experimental data gathered at the University of Liege are re-examined to show how the weir height, the keys widths and the overhangs positions influence, for a given crest length magnification ratio, the weir discharge capacity. The theoretical rating curve of a standard linear weir is considered for comparison. The analysis highlights that the keys widths and overhangs lengths ratios influence significantly the Piano Key Weir efficiency, but less than the weir height. Considering the above mentioned results, a cost efficient design proposed in the literature is also proved to be close to the hydraulic optimum. [less ▲]

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See detailL- and V-curves for Optimal Smoothing
Frasso, Gianluca ULg; Eilers, Paul H. C.

in Statistical Modelling : An International Journal (2014)

The L-curve is a tool for the selection of the regularization parameter in ill-posed inverse problems. It is a parametric plot of the size of the residuals vs that of the penalty. The corner of the L ... [more ▼]

The L-curve is a tool for the selection of the regularization parameter in ill-posed inverse problems. It is a parametric plot of the size of the residuals vs that of the penalty. The corner of the L indicates the right amount of regularization. In the context of smoothing the L-curve is easy to compute and works surprisingly well, even for data with correlated noise. We present the theoretical background and applications to real data together with an alternative criterion for finding the corner automatically. We introduce as simplification, the V-curve, which replaces finding the corner of the L-curve by locating a minimum. [less ▲]

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See detailCrime Hotspots In Belgium: Spatial He terogeneity In The Multivariate Regression Model?
Trotta, Marie ULg

Conference (2014, June)

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime ... [more ▼]

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime concentration-urban backcloth relationship, with the drawback of focusing on a single city. However, the urban backcloth is also shaped by the inter-cities and city-hinterland relationships. Our objective is to model the concentration of sexual offences for entire Belgium, at the very precise scale of the statistical sector in order to take into account the role of the urban hierarchy. Methods: We analyse the ViCLAS data for Belgium between 2004 and 2011. Specifically, we study the relationship between the concentration of initial contact scenes and socio-economic characteristics and facilities of the statistical sector, using two spatial models. First, we computed a spatial lag zero-inflated model (ZINB) in order to evaluate the global predictive capacities of the model. Then, a Poisson geographically-weighted regression (GWR) was run to study the spatial heterogeneity for each of the explanatory variables. Results: The zero-inflated negative binomial model with spatial lag recovers the neighbourhood environmental quality, the concentration of economic and cultural activities, and drinking places as major significant factors (Mc Fadden’s pseudo-r² of 0.2). The Poisson geographically-weighted regression underestimates the crime concentrations but highlights the spatial heterogeneity [less ▲]

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See detailGenetic diversity, structure and parentage analysis within several European apple germplasm collections assessed by microsatellite markers
Durel, Charles-Eric; Denancé, Caroline; Ravon, Elisa et al

Conference (2014, June)

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See detailRegards
Charlier, Sébastien ULg; Moor, Thomas

in Charlier, Sébastien; Moor, Thomas (Eds.) Guide architecture moderne et contemporaine 1895-2014 Liège (2014)

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See detailGuide architecture moderne et contemporaine 1895-2014 Liège
Charlier, Sébastien ULg; Moor, Thomas

Book published by Mardaga (2014)

À Liège et environs, le Guide d’architecture moderne et contemporaine vous invite à regarder l’architecture autrement : une sélection de 400 projets, commentés par 48 auteurs, confiés à la photographe ... [more ▼]

À Liège et environs, le Guide d’architecture moderne et contemporaine vous invite à regarder l’architecture autrement : une sélection de 400 projets, commentés par 48 auteurs, confiés à la photographe Elodie Ledure, illustrés de plans et situés sur cartes. Programmes modestes ou réalisations d’envergure, commandes privées et bâtiments publics, ils sont le fruit de la modernité revisitée à chaque époque par les architectes, de l’Art nouveau à aujourd’hui. Un projet de grande envergure Ce premier volume consacré à Liège s’inscrit dans une collection d’ouvrages de référence, fruit d’un important travail de recherche scientifique en collaboration avec les universités. Richement documentée, la collection n’en est pas moins accessible à un public large, sensibilisé au tourisme culturel et habitué aux guides de voyage. À paraître dans la collection « Guide d’architecture moderne et contemporaine » : - Mons, 2015 (label « Capitale européenne de la Culture ») - Charleroi, 2016 (350e anniversaire de la ville) - Tournai, 2017 Un formidable outil d’appropriation culturelle de la modernité La collection offre un regard neuf sur l’architecture, en proposant une sélection critique de bâtiments représentatifs de la modernité architecturale – et de la notion de progrès social, culturel, politique, économique, technique, esthétique qu’elle sous-tend. [less ▲]

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