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See detailDeactivation mechanisms and regeneration of a bimetallic hydrodechlorination catalyst
Heinrichs, Benoît ULg; Noville, Francis ULg; Schoebrechts, Jean-Paul et al

in Studies in Surface Science and Catalysis (1999), 126

The temporal evolution of the activity and selectivity of a 1.9%Pd-3.7%Ag/SiO2 catalyst during selective hydrodechlorination of 1,2-dichloroethane into ethylene is examined. A comparison between the ... [more ▼]

The temporal evolution of the activity and selectivity of a 1.9%Pd-3.7%Ag/SiO2 catalyst during selective hydrodechlorination of 1,2-dichloroethane into ethylene is examined. A comparison between the physico-chemical properties of the fresh catalyst and of the deactivated one suggests a deactivation mechanism by poisoning or coking of Ag sites at the surface of the active Pd-Ag particles. A regeneration treatment is proposed which allows to restore the initial properties of the fresh catalyst. [less ▲]

Detailed reference viewed: 39 (6 ULg)
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See detailDeactivation mechanisms and regeneration of a bimetallic hydrodechlorination catalyst
Heinrichs, Benoît ULg; Noville, Francis ULg; Schoebrechts, Jean-Paul et al

Poster (1999)

Detailed reference viewed: 10 (0 ULg)
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See detailDealing with crop rotation in agroforestry: the impact of shade on winter wheat and sugar beet growth and yield under belgium conditions
Artru, Sidonie ULg; Garré, Sarah ULg; Hiel, Marie-Pierre ULg et al

in Book of Abstract- 3rd European Agroforestry Conference 2016 (2016, May)

Detailed reference viewed: 26 (5 ULg)
Peer Reviewed
See detailDealing with nanotechnology: Do the boundaries matter?
Brunet, Sébastien ULg; Delvenne, Pierre ULg; Fallon, Catherine ULg et al

in Martorell, S.; Guedes Soares, C.; Barnett, J. (Eds.) Safety, Reliability and Risk Analysis: Theory and Applications (2008, September 23)

Detailed reference viewed: 63 (19 ULg)
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See detailDealing with paralogy in RADseq data: in silico detection and single nucleotide polymorphism validation in Robinia pseudoacacia L.
Verdu, C. F.; Guichoux, E.; Quevauvillers, Samuel ULg et al

in Ecology and Evolution (2016)

The RADseq technology allows researchers to efficiently develop thousands of polymorphic loci across multiple individuals with little or no prior information on the genome. However, many questions remain ... [more ▼]

The RADseq technology allows researchers to efficiently develop thousands of polymorphic loci across multiple individuals with little or no prior information on the genome. However, many questions remain about the biases inherent to this technology. Notably, sequence misalignments arising from paralogy may affect the development of single nucleotide polymorphism (SNP) markers and the estimation of genetic diversity. We evaluated the impact of putative paralog loci on genetic diversity estimation during the development of SNPs from a RADseq dataset for the nonmodel tree species Robinia pseudoacacia L. We sequenced nine genotypes and analyzed the frequency of putative paralogous RAD loci as a function of both the depth of coverage and the mismatch threshold allowed between loci. Putative paralogy was detected in a very variable number of loci, from 1% to more than 20%, with the depth of coverage having a major influence on the result. Putative paralogy artificially increased the observed degree of polymorphism and resulting estimates of diversity. The choice of the depth of coverage also affected diversity estimation and SNP validation: A low threshold decreased the chances of detecting minor alleles while a high threshold increased allelic dropout. SNP validation was better for the low threshold (4×) than for the high threshold (18×) we tested. Using the strategy developed here, we were able to validate more than 80% of the SNPs tested by means of individual genotyping, resulting in a readily usable set of 330 SNPs, suitable for use in population genetics applications. [less ▲]

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See detailDealing with sediment transport over partly non-erodible bottoms
Rulot, François; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Tullis, Blake; JJanssen, Robert (Eds.) Conference proceedings of 4th IJREWHS (2014)

In depth-averaged flow and morphodynamic models using a finite volume discretization based on explicit time integration, a specific difficulty can arise during a computation: the computed sediment level ... [more ▼]

In depth-averaged flow and morphodynamic models using a finite volume discretization based on explicit time integration, a specific difficulty can arise during a computation: the computed sediment level can become lower than the level of a non-erodible bottom. The original developments presented in this paper enable correction of the non-physical sediment levels. The method, based on iterative limitation of the outward fluxes, is perfectly mass conservative and remains computationally efficient. The resulting model has been validated with several 1D benchmarks leading to configurations with sediment transport over a nonerodible bottom. Two interesting experimental benchmarks are highlighted in this paper to show the efficiency of numerical simulations. In these benchmarks, the computation time has been verified not to increase by more than 15% when using the new method. [less ▲]

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See detailDealing with sediment transport over partly non-erodible bottoms
Rulot, François ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Tullis, Blake; Chanson, Hubert (Eds.) Proc. 4th International Junior Researcher and Engineer Workshop on Hydraulic Strucutres, IJREWHS’12 (2012)

In depth-averaged flow and morphodynamic models using a finite volume discretization based on explicit time integration, a specific difficulty can arise during a computation: the computed sediment level ... [more ▼]

In depth-averaged flow and morphodynamic models using a finite volume discretization based on explicit time integration, a specific difficulty can arise during a computation: the computed sediment level can become lower than the level of a non-erodible bottom. The original developments presented in this paper enable to correct the non-physical sediment levels. The method, based on iterative limitation of the outward fluxes, is perfectly mass conservative and remains computationally efficient. The resulting model has been validated with several 1D benchmarks leading to configurations with sediment transport over non-erodible bottom. Two interesting experimental benchmarks are highlighted in this paper to show the efficiency of numerical simulations. In these benchmarks, the computation time has been verified not to increase by more than 15% when using the new method. [less ▲]

Detailed reference viewed: 12 (2 ULg)
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See detailDealing with storm impacts on the forest sector through integrated and systemic approaches at the regional level
Riguelle, Simon ULg

Doctoral thesis (2016)

Wind is one the most damaging natural hazard that forests are facing worldwide and in Europe. Destructive storms lead to severe forest damage and consequently cause disruptions in daily forest management ... [more ▼]

Wind is one the most damaging natural hazard that forests are facing worldwide and in Europe. Destructive storms lead to severe forest damage and consequently cause disruptions in daily forest management and timber supply chains. Major dysfunctions can happen at each step of forest-wood chains and at each level of management, leading to huge economic losses and long-lasting crises within public organisations and private companies. In this context, the first part of this work aims at handling those complex and multi-facetted storm-related issues with new approaches in order to mitigate economic, environmental and societal impacts of storms on the forest-based sector. In a first step, an overview of risk management practices in forestry is presented, as well as major determinants of storm damage risk management. SWOT analyses are also used for highlighting main issues and opportunities in current windthrow management process. In a second step, an integrated framework is proposed for tackling those strategic issues and seizing opportunities arising from the uncertain decision-making context. A systemic perspective is also presented for managing storm damage risk at regional, national or supranational level with a holistic perspective. In regards to those original approaches, the thesis also highlights some of the crucial challenges public authorities might address for enhancing their affectivity in this process. In the second part of the manuscript, three particular aspects of storm damage management are considered: contingency planning, the development of decision-supporting tools for the forest community, and timber storage planning at the regional level. Those topics are illustrated by case studies taking place in Wallonia, Belgium. In particular, the development of a model-based decision support system (DSS) illustrate how systemic analysis can help on the one hand designing balanced strategies for the regional forest-based sector in case of severe wind damage and on the other hand identifying bottlenecks that should be solved before the next huge storm to enhance systemic resilience and resistance. Regarding timber conservation, a GIS-based methodology for locating optimal areas for sprinkling storage at the regional scale is presented, together with an applied study on the influence of anaerobic storage process on the quality of spruce logs. From a wider perspective, this thesis reveals that taking decision under uncertainty will remain a key challenge to address in forestry, especially in the context of climatic change. However, original methodologies focusing on systemic and integrated risk management approaches can help in this effort. Finally, the work emphasises the urgent need of effective risk management policies at regional, national, and international levels to guide researchers, forest managers and industrials. [less ▲]

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See detailDealing with the non-detected and non-quantified data. The example of the serum dioxin data in the French dioxin and incinerators study
Zeghnoun, A.; Pascal, M.; Frery, N. et al

in Organohalogen Compounds (2007), 69

Detailed reference viewed: 96 (5 ULg)
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See detailDéambuler dans la ville. Une expérience visuelle critique et artistique
Hagelstein, Maud ULg

Article for general public (2009)

Du 3 juin au 6 septembre, l’exposition Heaven and Earth présentait les œuvres peu bavardes de Richard Long à la Tate Britain. Comme à Rome, à Sydney ou à Tokyo, l’artiste anglais fit venir des pierres ... [more ▼]

Du 3 juin au 6 septembre, l’exposition Heaven and Earth présentait les œuvres peu bavardes de Richard Long à la Tate Britain. Comme à Rome, à Sydney ou à Tokyo, l’artiste anglais fit venir des pierres, anguleuses et/ou polies, pour ses installations Land Art d’intérieur (le paradoxe est assumé). Quelques photographies envoûtantes montraient aussi les interventions minimalistes de Long dans le paysage : un sac à dos posé contre un tas de pierre, une croix au sol dans un champ de fleurs, une ligne dans le désert. Mais ces aspects de l’œuvre sont désormais classiques et le caractère inédit du projet de Richard Long est ailleurs : en tant qu’il exploite le potentiel artistique de la marche, l’artiste indique sa valeur conceptuelle et créative. De fait, chaque promenade semble avoir pour mission de poursuivre une idée – même s’il n’en reste à peu près rien à l’arrivée qu’une indication rapide, généralement quantitative, imprimée sur papier. Entre deux sorties, il inverse par exemple la distance parcourue et le timing : « Hours / Miles / A walk of 24 hours : 82 miles / A walk of 24 miles in 82 hours / England 1996 ». De ses marches, on voit peu de choses exposées, si ce n’est le concept, énoncé comme ici en quelques mots. L’artiste réalise des expériences, calcule des distances, récolte des sons. Combien de temps pourra-t-il marcher au sec entre deux averses ? « Dry Walk / 113 walking miles between one shower of rain and the next / Avon England 1989 ». D’autres fois, les parcours tracent des lignes sur de vastes territoires et sont comme des dessins grandeur nature. Le mouvement et l’arrêt constituent les éléments « picturaux » de ces gigantesques fresques virtuelles (que Long reproduit néanmoins sur des cartes). À l’échelle maximale, la marche suivra alors telle spirale, ou telle forme géométrique, décidée par avance. Et si l’hypothèse de Richard Long n’était pas si folle ? S’il suffisait de marcher pour faire de l’art ? [less ▲]

Detailed reference viewed: 210 (5 ULg)
See detailDeath as an Expression of Worldview in a Ballad Culture: The Evidence of Newfoundland
Peere, Isabelle ULg

Doctoral thesis (1992)

This study investigates death as an expression of worldview in Newfoundland tradition, and with particular attention given to its classical ballads. From the correlation of their people's life style and ... [more ▼]

This study investigates death as an expression of worldview in Newfoundland tradition, and with particular attention given to its classical ballads. From the correlation of their people's life style and moral orientations (the pragmatic context), the views and values carried across genres (the symbolic context) and those expressed within the ballads (their poetic context), one claims to find articulated a coherent worldview upholding positive behaviour--in the face of death as in life. While this attitude is found expressed in traditional societies as well as in classical balladry, it pervades past and modern local tradition, and seems particularly appropriate to Newfoundland's maritime culture. The striking prominence of revenant types in the classical ballad repertoire and the exceptional courage of the heroine of the most popular "Sweet William's Ghost" (Ch 77) confirm local concern with bereavement and its successful resolution. This evidence for Newfoundland yields the proposition that, while the meanings carried in a cultural ballad corpus are essentially generic, they are actualized in dynamic relation with specific cultural contexts and worldviews. [less ▲]

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See detailDeath rate and weakening of honeybees in the southern part of Belgium.
Nguyen, Bach Kim ULg

in Proceedings of the Second European Conference of Apidology (2006)

Detailed reference viewed: 24 (2 ULg)
See detailDebaar, Mathieu
Pirenne, Christophe ULg

in Nouvelle Biographie Nationale (2001)

Detailed reference viewed: 8 (0 ULg)
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See detailDébat "Création d'une association francophone en digital humanities"
Dozo, Björn-Olav ULg

Conference (2013, October 18)

Animation et présidence du débat

Detailed reference viewed: 20 (2 ULg)
See detailLe débat art-industrie dans la deuxième moitié du XIXème siècle en Belgique. Une analyse documentaire
Prina, Daniela ULg

in Actes du Neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique - LVIe Congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique - Liège, 23-26 août 2012 (in press)

Detailed reference viewed: 71 (8 ULg)
See detailDébat avec Carole Talon-Hugon autour de "Goût et dégoût. L'art peut-il tout montrer ?"
Steinmetz, Rudy ULg

Diverse speeche and writing (2005)

Detailed reference viewed: 107 (3 ULg)
See detailDébat avec Fatou Diome
Martiniello, Marco ULg

Diverse speeche and writing (2015)

Detailed reference viewed: 22 (2 ULg)
See detailDébat avec Jacques Derrida
Steinmetz, Rudy ULg

Diverse speeche and writing (2001)

Detailed reference viewed: 8 (0 ULg)
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See detailUn débat barré ? Les dessous d'une carte : l'affaire du Vif/L'Express
Vanesse, Marc ULg; Geelkens, Mélanie

in Matière & l'Esprit (La) (2011)

Réflexion sur la publication de la carte blanche rédigée par des universitaires s'indignant du licenciement de quatre journalistes du "Vif/L'Express".

Detailed reference viewed: 57 (7 ULg)