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See detailChildren’s Knowledge About Memory: Adaptation and French Validation of a Scale to Assess it.
Geurten, Marie ULg; Catale, Corinne ULg; Meulemans, Thierry ULg

in INS Abstract Book (2013)

The present study aimed at adapting and testing a French version of Kreutzer et al.’s metamemory interview (1975) in a group of 128 children aged of 4, 6, 9, and 12. Following Fritz et al. (2010 ... [more ▼]

The present study aimed at adapting and testing a French version of Kreutzer et al.’s metamemory interview (1975) in a group of 128 children aged of 4, 6, 9, and 12. Following Fritz et al. (2010), adjustments have been made to reduce language skill contamination as well as to increase the developmental appropriateness and sensibility of the scale. Results show the emergence of two sub-scales (“strategy knowledge” and “general memory knowledge”) on the factor analysis and reveal an excellent interrater reliability as well as a good internal consistency for the global scale and two sub-scales (respectively, Cronbach α = .79; .81 and .71). As expected with regard to the literature, a significant correlation has appeared between the metamemory scale and short-term memory capacities (convergent validity). Similarly, the metamemory score has shown its ability to predict children memory performance (predictive validity). Finally, the lack of correlation between most of the scale’s items and vocabulary measurement (Peabody Picture Vocabulary Test) and the very good ability of the scale to distinguish between age groups demonstrate that the adaptations made to improve the Kreutzer et al.’s scale in terms of language’s contamination and developmental sensibility have reached their goal. Regarding its psychometric properties, these results suggest that this interview can be considered as a useful and reliable tool for developmental research. Furthermore, they confirm the importance of metamemory knowledge in memory performance. Future studies will have to be carried out to show the utility of this scale in a clinical population. [less ▲]

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See detailConstraints analysis of family agriculture in Kirundo Province Northern of Burundi
Minani, Bonaventure ULg; Rurema, Déo-Guide; Lebailly, Philippe ULg

in University of East Sarajevo, Faculty of Agriculture; University of Belgrade, Faculty of Agriculture; Mediterranean Agronomic Institute of Bari (IAMB) (Eds.) IV International Symposium "Agrosym 2013" : Proceedings (2013)

In Burundi, family agriculture occupies more than 90% of the active population. That sector accounts more than 50% of GDP. Before the civil war of 1993, Kirundo province was deemed "breadbasket of the ... [more ▼]

In Burundi, family agriculture occupies more than 90% of the active population. That sector accounts more than 50% of GDP. Before the civil war of 1993, Kirundo province was deemed "breadbasket of the country" because the family farming was market-oriented. Today, this region is the first province in Burundi who accuses a high rate of householders who live in food insecurity. In order to conduct this study, 355 randomly selected farmers were surveyed in all municipalities of the province. This preliminary study revealed that the farmers had as major constraints: the small and land conflicts. The study case had identified 73 farmers among them who had not farmland and/ or land conflicts as constraints of agricultural productivity. Two groups emerged: 42 farmers who were not able to fully exploit their land and another group of 32 farmers with a high agricultural productivity. Results from this study show that the major problems in the first group were: lack of applying soil protection techniques, illiteracy, lack of credit which leads farmers to contract moneylenders, lack of improved seed, etc. Moreover, the main strategy used by the second group to boost their income is the practice of non-agricultural activities which influences whole production system. [less ▲]

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See detailLes besoins sociaux et économiques de la collectivité dans le droit de l’aménagement du territoire et de l’urbanisme
Pâques, Michel ULg; Donnay, Luc ULg; Vercheval, Cécile ULg

in Delnoy, Michel; Born, Charles-Hubert; Van Damme, Nathalie (Eds.) Le droit de l’aménagement du territoire et de l’urbanisme, 50 ans après la loi organique (2013)

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See detailArt on the lagoon: Eliasson at the Biennale of Venice
Szanto, Catherine ULg; Gay, Fabrizio; Ballarin, Matteo

in Newman, Conor; Nussaume, Yann; Pedroli, Bas (Eds.) Landscape and Imagination. Towards a new baseline for education in a changing world (2013)

The Biennales of Venice are not limited to exhibitions in national pavilions. Every year artists and architects choose to confront the site and more specifically, the lagoon. In the edition of 2005, the ... [more ▼]

The Biennales of Venice are not limited to exhibitions in national pavilions. Every year artists and architects choose to confront the site and more specifically, the lagoon. In the edition of 2005, the artist O. Eliasson proposed an installation (Your black horizon, 2005) where the visitors left the wide expanse and intense light of the lagoon to enter a darkened enclosed space with subtle light effects. These aesthetic experiences enhanced the visitors’ perception of light by changing the usual spatiality and temporality of colour. We will analyze the role of memory in the rite of the visit, and look at how the museal strategies of the artist create a play with spatial memory and sense of orientation in relation to the outdoor space of the lagoon. [less ▲]

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See detailThe astronomical calibration of the Givetian (Middle Devonian) time scale (Dinant Synclinorium, Belgium).
De Vleeschouwer; Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg et al

in American Geophysical Union Fall Meeting, Abstract (2013)

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See detailEmissions of ammonia, nitrous oxide and methane from pig houses: Influencing factors and mitigation techniques
Philippe, François-Xavier ULg; Nicks, Baudouin ULg

in Reconciling livestock management to the environment - Applying Best Available Technique (BAT): From the lab to the farm (2013)

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See detailSymposium - Echec scolaire, redoublement ou décrochage : les croyances des enseignants sous la loupe…
Fagnant, Annick ULg; Poncelet, Débora

in Congrès international. Actualité de al recherche en éducation et en formation. AREF 2013 (2013)

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See detailDu Grand Monarque au Mouton Blanc. Souvenirs d'écrivains
Droixhe, Daniel ULg

in Droixhe, Daniel (Ed.) Spa, carrefour de l'Europe des Lumières. Les hôtes de la cité thermale au XVIIIe siècle, sous la dir. de Daniel Droixhe, avec la collaboration de Muriel Collart (2013)

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See detailL'impact des activités non-agricoles sur la pauvreté et l'inégalité rurales, cas des groupements Bugorhe et Irhambi-Katana (Territoire de Kabare, Province du Sud-Kivu)
Furaha Mirindi, Germaine ULg; Mastaki, Leki; Lebailly, Philippe ULg

in Société Française d'Economie Rurale (Ed.) 7èmes Journées de Recherches en Sciences Sociales : actes du colloque (2013)

Dans un contexte d’abandon ou négligence du secteur agricole par le pouvoir public, cette étude cherche à analyser la contribution de l’activité non agricole sur la réduction de la pauvreté et des ... [more ▼]

Dans un contexte d’abandon ou négligence du secteur agricole par le pouvoir public, cette étude cherche à analyser la contribution de l’activité non agricole sur la réduction de la pauvreté et des inégalités dans le territoire de kabare dans la province du Sud-kivu. La présente étude se focalise sur deux groupements du territoire de kabare de la province du Sud-Kivu à savoir Bugorhe et Irhambi-katana dont le centre de kavumu a été retenu dans l’échantillonnage pour le premier et le centre Katana dans le second. Deux grandes catégories des ont intéressées la présente étude : les ménages qui exercent l’activité agricole uniquement et les ménages combinant l’activité agricole et le commerce (notés ici ménages agricommerçants). A partir des données de l’enquête menée en mars et avril 2012, nous examinons l’effet du revenu non-agricole sur la pauvreté et l’inégalité en zone rurale de la province du Sud-kivu. Nous partons d’une approche qui considère le revenu non-agricole comme un « transfert exogène » qui s’ajoute au revenu total du ménage et analysons la contribution des différents types de revenus à l’inégalité en utilisant la décomposition de l’indice de Gini. Nous analysons la pauvreté en référence à l’approche de la Banque Africaine de Développement (2010) de l’analyse de la pauvreté en RDC. L’approche absolue de mesure de la pauvreté (pauvreté monétaire) qui est mesurée par les indices de Foster-Greer Thorbecke (F.G.T, 1984). L’étude a porté sur un échantillon de 135 ménages obtenu à partir de la technique de sondage systématique appliquée sur les ménages agri-commerçants, et d’un échantillonnage par quotas appliqué sur les ménages à unique activité agricole. Selon ces enquêtes, les ménages agricommerçants échappent aux chocs négatifs grâce à l’activité commerciale qui assure les besoins de base et finance l’activité agricole. Malgré le déclin relatif et structurel du secteur agricole du Sud-Kivu, 98,3% des ménages n’abandonnent pas cette activité pour des raisons d’autoconsommation (100% des ménages), de sécurité et d’estime sociale (73%), de stabilité économique (82%). Les ménages à unique activité agricole sont plus exposés au phénomène de pauvreté : 80,9% d’eux vivent avec un revenu inférieur au seuil minimum de 171,2$/pers/an. La profondeur de la pauvreté est plus accentuée chez les ménages agriculteurs (37,6%) que chez les ménages agri-commerçants (1,9%). En plus, la pauvreté est plus sévère chez les ménages agriculteurs (21,9%) que chez les ménages agri-commerçants (0,3%). Le secteur agricole contribue moins à l’inégalité par rapport à l’activité de commerce. En effet, pour un indice de Gini de 0,5242, le revenu issu du commerce contribue fortement à l’inégalité de revenus des ménages à l’ordre de 58,7% contre une contribution à l’inégalité de l’ordre de 24,4% du revenu agricole pour un indice de Gini de 0,2356. Dans le contexte du milieu d’étude, l’activité commerciale permet aux ménages de survivre mais n’est pas un moyen efficace pour un développement rural durable dans ce milieu à fort potentialité agricole. [less ▲]

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See detailAre Designers Sufficiently Instructed to Make the Most Rewarding Use of the Latest Steel Codes?
Maquoi, René ULg

in 2013 SSRC Stability Conference (2013)

Series of comments stressing some points of Eurocode 3 which must be duly mastered to enable more economical design of steel structures.

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See detailDevelopment of organic farming in Wallonia : past, present and perspectives
Burny, Philippe ULg; Debode, Frédéric

in Lorencowicz, Edmund; Uziak, Jacek; Huyghebaert, Bruno (Eds.) VI International Scientific Symposium "Farm Machinery and Processes Management in Sustainable Agriculture" : Symposium Proceedings (2013)

Organic farming is today fully recognized as an alternative to conventional agriculture and its problems (water and air pollution, large use of pesticides and possible impacts on human health, vegetal and ... [more ▼]

Organic farming is today fully recognized as an alternative to conventional agriculture and its problems (water and air pollution, large use of pesticides and possible impacts on human health, vegetal and animal diseases, overproduction, ..) and is clearly supported by the Common Agricultural Policy and its "greening". Belgian (and Walloon) agriculture is an intensive one, with a high "labour force/agricultural area" ratio and high yields thanks to good soils, but also the use of large quantities of inputs like fertilizers and pesticides. However, organic farming increased in importance during the last years and th Walloon regional government has just launched a development plan in June 2013. So, this paper aims to analyse the evolution of organic farming in Wallonia and to present the goals and the measures of the new development plan. [less ▲]

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See detailTraining-induced decrease of cytokines production by equine alveolar macrophages
Waldschmidt, Ingrid ULg; Frellstedt, Linda ULg; Art, Tatiana ULg et al

in Proceedings of the 6th Congress of the European College of Equine Internal Medicine (ECEIM) (2013)

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See detailSoft-bottom macrobenthos monitoring in the framework of the STARE-CAPMED program
Donnay, Annick ULg; Pelaprat, Corinne; Fréjefond, Charlène et al

in CIESM Congress Proceedings n*40 (2013)

STARE-CAPMED is a research program set up by the Stareso research station (Calvi, Corsica). Its aim is to improve the understanding of processes by which anthropogenic activities have adversed effects on ... [more ▼]

STARE-CAPMED is a research program set up by the Stareso research station (Calvi, Corsica). Its aim is to improve the understanding of processes by which anthropogenic activities have adversed effects on the functioning of Calvi Bay coastal ecosystems. One of its work packages is the monitoring of soft-bottom macrobenthos along 5 gradients of potential anthropogenic pressures. First results suggest that, before summer (summer is the period where man-driven impacts are expected to be stronger due to high tourist frequentation) these sources of potential anthropogenic pressures perturb soft-bottom macrobenthos assemblages. [less ▲]

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See detailAxisymmetric transient modelling of a wind turbine foundation in cohesionless soil using the Prevost’s model
Cerfontaine, Benjamin ULg; Levasseur, Séverine ULg; Charlier, Robert ULg

in Computational Methods in Marine Engineering (2013)

Suction caissons are more and more used for offshore foundations. This paper deals with the cyclic modelling of suction caissons using the Prevost's model. The case study is a 8m large diameter embedded ... [more ▼]

Suction caissons are more and more used for offshore foundations. This paper deals with the cyclic modelling of suction caissons using the Prevost's model. The case study is a 8m large diameter embedded in dense No. 0 Lund sand. Parameters for the model are calibrated using drained triaxial tests. A parametric study concerning the influence of the constitutive law, the skirt length and permeability is carried out. [less ▲]

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See detailLa cause d'utilité publique
Pâques, Michel ULg; Donnay, Luc ULg; Vercheval, Cécile ULg

in Renders, David (Ed.) L'expropriation pour cause d'utilité publique (2013)

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See detailDes guerres contre l’anarchie : constructions idéologiques à la cour de France au temps des premières Guerres d’Italie (1494–1525)
Dumont, Jonathan ULg

in Mazauric, Simone (Ed.) Écrire la guerre, écrire la paix. 136e Congrès national des Sociétés historiques et scientifiques, Perpignan 2011 (2013)

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See detailThe role of memory traces quality in directed forgetting: A comparison of young and elderly participants using the item procedure
Lorant; Grandjean, Julien; Bastin, Christine ULg et al

in Proceedings of the Annual Meeting of the Belgian Association for Psychological Sciences (2013)

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See detailDescribing the “elusive”: a new perception of the practices and the resources of illuminators in the North of Europe from the fourteenth to the sixteenth century
Neven, Sylvie ULg

in Saunders, David; Spring, Marika; Meek, Andrew (Eds.) Renaissance Workshop (2013)

Due to their trade value, a huge range of artistic materials are documented and recorded in historical written sources. However, certain substances are not registered in these archives because they did ... [more ▼]

Due to their trade value, a huge range of artistic materials are documented and recorded in historical written sources. However, certain substances are not registered in these archives because they did not have a market value. This is especially the case for vegetal species which artists easily found in nature and used for their colouring principles, like anthocyanin colorants. As they are characterized by a great sensitivity to the slightest changes in pH and as they are highly unstable in ordinary daylight, these colorants were not frequently used in the dyeing of quality materials or in painting. Up until now, they have been mainly considered as being used in a domestic context, for the dyeing of everyday clothes. Moreover, after ageing, the plant species are difficult to identify with currently-used analytical methods. We therefore intend to bring to light these « elusive » substances through the close examination of an original and primordial source : artistic recipe books. Our previous researches have highlighted that these books not only describe these organic colorants, but that they also indicate their use in illumination. From the 14th to the 16th century, hundreds of recipe books containing information relating to these colorants were produced. They describe both their preparation, their diverse applications and the required conditions for their conservation. These recipe books also inform us about the different hues obtained from these colorants. Our study will involve analysing the significance of these organic substances as well as (re)defining their use with a view to increasing our knowledge of historical artistic practices and materials. Furthermore, it could also help to identify specific artistic productions or workshops. Finally, it would be possible to learn more about the status of artists, their working conditions and their training. [less ▲]

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See detailOn-line profiling of Escherichia coli stress response
Brognaux, Alison ULg; Shanshan, Han; Sorensen, Soren et al

in Communications in Agricultural and Applied Biological Sciences (2013)

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See detailNew capabilities of the INCL4.6 model implemented into high-energy transport codes
Leray, S.; Boudard, A.; Braunn, B. et al

in Proceedings of Shielding Aspects of Accelerators, Targets and Irradiation Facilities 2011 (2013)

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See detailLes procédures alternatives en droit belge : autant de tentatives d'accélérer la justice
Jacobs, Ann ULg

in Jacobs, Ann (Ed.) Les alternatives au procès pénal (2013)

Examen des différentes alternatives au procès pénal en droit belge, de leur raison d'être, de leur champ d'application et de leurs enjeux.

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See detailImpairment of two memory cerebral networks in Alzheimer's disease
Bastin, Christine ULg; Bahri, Mohamed Ali ULg; Collette, Fabienne ULg et al

in Proceedings of the Annual Meeting of the Belgian Association for Psychological Sciences (2013)

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See detailCollective Entrepreneurship, a Solution to Conflicting Institutional Logics in the Entrepreneurship Process?
Dufays, Frédéric ULg

in Teirlinck, Peter; Kelchtermans, Stijn; de Beule, Filip (Eds.) The Proceedings of the 8th European Conference on Innovation and Entrepreneurship ECIE 2013 (2013)

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See detailAn exploratory approach to transitivizing morphemes in French
Mazziotta, Nicolas ULg; Martin, Fabienne

in Wielfaert, Thomas; Heylen, Kris; Speelman, Dirk (Eds.) Proceedings of the 5th Conference on Quantitative Investigations in Theoretical Linguistics (2013)

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See detailLearning a Dictionary of Prototypical Grasp-predicting Parts from Grasping Experience
Detry, Renaud ULg; Ek, Carl Henrik; Madry, Marianna et al

in IEEE International Conference on Robotics and Automation (2013)

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See detailCognitive reserve, recollection and familiarity in normal aging, Mild Cognitive Impairment and Alzheimer's disease
Laisney, Mickaël; Salmon, Eric ULg; Bastin, Christine ULg

in Proceedings of the Annual Meeting of the Belgian Association for Psychological Sciences (2013)

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See detailStepped spillway Downstream of a Piano Key Weir - Critical length for uniform flow
Silvestri, Aurélien ULg; Pirotton, Michel ULg; Erpicum, Sébastien ULg et al

in Bung, Daniel B.; Pagliara, Stefano (Eds.) International Workshop on Hydraulic Design of Low-Head Structures (2013)

Recent researches showed the rapid aeration of the flow downstream of piano key weirs. This could be related to the specific geometric features of the structure, creating several interacting flows and ... [more ▼]

Recent researches showed the rapid aeration of the flow downstream of piano key weirs. This could be related to the specific geometric features of the structure, creating several interacting flows and jets downstream. In order to validate this assumption, an experimental research has been carried out at the Laboratory of Engineering Hydraulics, University of Liège. The main objective of the study was to an-alyze the energy dissipation occurring in skimming flow conditions on a stepped spillway downstream of a piano key weir (PKW). Comparison with energy dissipation on a stepped spillway downstream of a standard ogee crested weir has been performed. An indirect method has been used to determine the resid-ual energy at the spillway toe. The results show that uniform flow conditions are reached faster on a stepped spillway downstream of a PWK compared to the length needed downstream of a standard ogee crested weir. Extrapolation of the results to prototype flow conditions is also discussed with regards to scale effects influence. [less ▲]

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See detailScalable High-Performance Parallel Design for Network Intrusion Detection Systems on Many-Core Processors
Jiang, Hayang; Xie, Gaogang; Salamatian, Kavé et al

in Proceedings of ANCS 2013 (2013)

Network Intrusion Detection Systems (NIDSes) face significant challenges coming from the relentless network link speed growth and increasing complexity of threats. Both hardware accelerated and parallel ... [more ▼]

Network Intrusion Detection Systems (NIDSes) face significant challenges coming from the relentless network link speed growth and increasing complexity of threats. Both hardware accelerated and parallel software-based NIDS solutions, based on commodity multi-core and GPU processors, have been proposed to overcome these challenges. Network Intrusion Detection Systems (NIDSes) face significant challenges coming from the relentless network link speed growth and increasing complexity of threats. Both hardware accelerated and parallel software-based NIDS solutions, based on commodity multi-core and GPU processors, have been proposed to overcome these challenges. This work explores new parallel opportunities afforded by many-core processors for high performance, scalable and inexpensive NIDS. We exploit the huge many-core computational power by adopting a hybrid parallel architecture combining data and pipeline parallelism. We also design a hybrid load balancing scheme, using both ruleset and flow space partitioning. Furthermore, the proposed design leverages particular features of the processor to break the bottlenecks. We have integrated the open source NIDS Suricata into our proposed design and evaluated its performance with synthetic traffic. The prototype exhibits almost linear speedup and can handle up to 7.2 Gbps traffic with 100-bytes packets. [less ▲]

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See detailDendrochronologie en région bruxelloise, en Wallonie et en France par l'Université de Liège (CEA) en 2012
Hoffsummer, Patrick ULg; Lambert, Georges-Noel; Blain, Sophie ULg et al

in Chronique, Archaeologia Mediaevalis 36, Bruxelles, 2013. (2013)

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See detailA water retention model for compacted clayey soils
Dieudonné, Anne-Catherine ULg; Levasseur, Séverine ULg; Charlier, Robert ULg et al

in Pietruszczak, S; Pande, GN (Eds.) Computational Geomechanics (2013)

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See detailGeneration of provably correct high-order meshes
Toulorge, Thomas; Geuzaine, Christophe ULg; Remacle, Jean-François et al

in Advances in Computational Mechanics (ACM 2013) - Finite Elements in Flow Problems (FEF 2013) (2013)

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See detailBuilding an Annotated Corpus of Late Egyptian. The Ramses Project: Review and Perspectives
Polis, Stéphane ULg; Honnay, Anne-Claude ULg; Winand, Jean ULg

in Polis, Stéphane; Winand, Jean (Eds.) Texts, Languages & Information Technology in Egyptology. Selected papers from the meeting of the Computer Working Group of the International Association of Egyptologists (Informatique & Égyptologie), Liège, 6-8 July 2010 (2013)

This paper reviews the experience of the Ramses Project in constructing a richly annotated corpus of Late Egyptian that consists of 300 000 words in 2011 (and is expected to grow up to more than 1 million ... [more ▼]

This paper reviews the experience of the Ramses Project in constructing a richly annotated corpus of Late Egyptian that consists of 300 000 words in 2011 (and is expected to grow up to more than 1 million words in coming years). During the first five years of the project, this corpus has been encoded in hieroglyphic script, translated in French or English and received annotations for part-of-speech information, lemmatization, and morphological analysis. The methodology and working tools that have been developed in order to build this corpus are here discussed and future developments are presented. [less ▲]

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See detailFlowOS: a Flow-Based Platform for Middleboxes
Abdul, Alim; Bezahaf, Mehdi; Mathy, Laurent ULg

in Proceedings of CoNEXT Workshops 2013 (2013)

Middleboxes are heavily used in the Internet to process the network tra c for a speci c purpose. As there is no open standards, these proprietary boxes are expensive and di - cult to upgrade. In this ... [more ▼]

Middleboxes are heavily used in the Internet to process the network tra c for a speci c purpose. As there is no open standards, these proprietary boxes are expensive and di - cult to upgrade. In this paper, we present a programmable platform for middleboxes called FlowOS to run on commod- ity hardware. It provides an elegant programming model for writing ow processing software, which hides the complexi- ties of low-level packet processing, process synchronisation, and inter-process communication. We show that FlowOS itself does not add any signi cant overhead to ows by pre- senting some preliminary test results. [less ▲]

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See detailSparse Summarization of Robotic Grasp Data
Hjelm, Martin; Ek, Carl Henrik; Detry, Renaud ULg et al

in IEEE International Conference on Robotics and Automation (2013)

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See detailIs organic farming a tool for sustainable development in Wallonia ?
Burny, Philippe ULg; Debode, Frédéric

in Socaciu, Carmen (Ed.) The 12th International Symposium "Prospects for the 3rd Millennium Agriculture" : Book of abstracts, volume 1 (2013)

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See detailCrystal chemistry and geothermometric applications of primary pegmatite phosphates.
Hatert, Frédéric ULg

in PEG2013 – 6th International Symposium on Granitic Pegmatites, Abstract book (2013)

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See detailOrganic farming - A business perspective
Burny, Philippe ULg; Debode, Frédéric

in Bran, Florina; Cesaretti, Gin Paolo; Ioan, Ildiko (Eds.) et al Advanced study school "The emergence of green businesses by the activation of economic competitiveness' innovative potential within the matrix of sustainable development (2013)

Organic farming is more and more considered as a credible alternative to conventional agriculture, being able to solve current problesm, notably with respect to environment, employment and food safety. In ... [more ▼]

Organic farming is more and more considered as a credible alternative to conventional agriculture, being able to solve current problesm, notably with respect to environment, employment and food safety. In the South of Belgium, Wallonia, organic farming represents today a significant part of agriculture. The goal of this paper is to show the growth of organic farming in Wallonia, to examine the present situation and to analyse the public support granted to organic farming, through direct payments but also through a new regional development plan including research, extension, promotion and the definition of quantified targets concerning economic activity and consumption. The results are based on statistical data collection and on a Survey among organic cereals producers, in order to contribute to the assessment of the economic relevance of organic farming. [less ▲]

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See detailSocial economic resilience of poor households in Rwanda : VUP 2020 and Girinka Program
Militery Ngamata, Olivier ULg; Mbonyinkebe, Deo; Lebailly, Philippe ULg

in Tielkes, Eric (Ed.) Tropentag 2013 "Agricultural development within the rural-urban continuum" : book of abstracts (2013)

Rwanda is a landlocked country, situated in central and east Africa. It is one of the poorest countries in world, 166th in 186 classified (IDH, 2012). The poor households poverty are shown decreasing from ... [more ▼]

Rwanda is a landlocked country, situated in central and east Africa. It is one of the poorest countries in world, 166th in 186 classified (IDH, 2012). The poor households poverty are shown decreasing from 58.9% in 2000/01 (EICV1) to 44.9% in 2010/11 (EICV3) . At the same period, extreme poverty shows similar patterns; on national level it fell from 40% in 2000/01 to 24.1% in 2010/11. This paper analyses the contribution of the social protection programs to poverty reduction of household beneficiaries: (1) The Vision 2020 Umurenge Programme (VUP) – an Integrated Local Development Program which has trees components: (i) Direct support (DS) for the poorest people who are not able to work. (ii) Public Works (PW) – this component promote the rural employment on productive community assets development projects and (iii) Financial Services (FS) – which increase the access to financial services for the poor for providing loan at low interest rate. (2) The Girinka programme as known “one cow per one poor family”. The programme aims at enabling poor household to own and manage an improved dairy cow which would help the family to better their livelihood through increased milk and meat production and to improve soil fertility of their land for their crops using the available manure. After presenting briefly the achievements, we will compare the socio-economic conditions of genocide windows before and after launching these programs in Munyiginya Sector in Rwamagana Districts. [less ▲]

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See detailMaîtrise et usage des TIC : la situation des enseignants en Belgique francophone
Henry, Julie ULg; Joris, Noémie ULg

in Drot-Delange, Béatrice; Bruillard, Éric; Baron, Georges-Louis (Eds.) Sciences et technologies de l'information et de la communication (STIC) en milieu éducatif, Clermont-Ferrand : France (2013)

Sans être une revue exhaustive et détaillée de tout ce qui s’est fait et se fait en Belgique francophone en ce qui concerne la formation des enseignants, cet article propose un arrêt sur image permettant ... [more ▼]

Sans être une revue exhaustive et détaillée de tout ce qui s’est fait et se fait en Belgique francophone en ce qui concerne la formation des enseignants, cet article propose un arrêt sur image permettant de constater ce qui est mis en place en 2013, d'en discuter et de découvrir ce qui se prévoit dans un avenir plus ou moins proche. En s'appuyant sur le discours européen sur la maîtrise des TIC par les enseignants, les auteurs pointent du doigt les différents programmes de formation accessibles aux (futurs) enseignants, que ce soit au cours de leur formation initiale ou dans un cadre de formation continué. Ils envisagent également les formations complémentaires et présentent la seule certification TIC existant à l'heure d'écrire ce texte : form@TICEF. La description qui en est faite met l'accent sur les objectifs annoncés et sur la méthodologie originale qui y est mise en place. Pour compléter le tableau, les différentes initiatives qui naissent actuellement dans le paysage belge sont évoquées, trouvant logiquement leur place parmi les perspectives de la formation en TIC des enseignants. Des constats sont tirés, des réflexions sont amenées, le débat est ouvert. [less ▲]

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See detailImpact of social protection programs on economic resilience of poor households in Eastern Province of Rwanda
Militery Ngamata, Olivier ULg; Mbonyinkebe, Deo; Lebailly, Philippe ULg

in Kovacevic, Dusan (Ed.) Fourth International Scientific Symposium "Agrosym 2013“ : proceedings (2013)

This paper analyses the contribution of three programs of poverty reduction in Rwanda. It uses data from different reports and surveys with beneficiary poor households of social protection programs. The ... [more ▼]

This paper analyses the contribution of three programs of poverty reduction in Rwanda. It uses data from different reports and surveys with beneficiary poor households of social protection programs. The activities developed by these programs have allowed the poor in general and the widows of genocide in the Eastern Province of Rwanda in particular to improve their socioeconomic conditions, notably access to education, accommodation and medical care. Moreover, the beneficiaries have developed activities that diversify households’ revenues and improve their economic resilience. [less ▲]

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See detailLes jeunes de l'Extrême-Nord/Cameroun, l'Internet et la participation au développement communautaire. Esquisse d'une stratégie de Net-développement
Beche, Emmanuel ULg

in Oben Ako et Zourmba, Edouard et Hamadou (Ed.) Enjeux et perspectives techniques, économiques et sociales pour le développement des régions septentrionales du Cameroun (2012, December 14)

Dans cet article, nous étudions comment les jeunes de l’Extrême-Nord/Cameroun utilisent l’Internet au service du développement communautaire. Nous nous sommes basé à cet effet sur l’examen des données ... [more ▼]

Dans cet article, nous étudions comment les jeunes de l’Extrême-Nord/Cameroun utilisent l’Internet au service du développement communautaire. Nous nous sommes basé à cet effet sur l’examen des données d’entretien et sur l’analyse de contenu des sites web/blogs et des groupes facebook qu’ils mobilisent et éditent dans ce cadre. Cet examen indique qu’avec les cyberpages, ces jeunes informent et mobilisent en faveur du développement de leur région. Sur les groupes facebook, ils forment des communautés de pratiques où ils discutent et se concertent sur des besoins et projets de développement. En analysant ces pratiques dont les effets sont toutefois limités par un contexte socio-technologique déficitaire, nous avons aussi esquissé une stratégie de Net-développement communautaire. [less ▲]

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See detailDes modules de formation au service de la lutte contre la fracture numérique : regards sur 10 années du Plan Mobilisateur TIC.
Brundseaux, Marie-France ULg; Georges, François ULg; Verpoorten, Ingrid ULg

in NKambou (Ed.) Intégration Technologique et Nouvelles Perspectives d’Usage (2012, December 12)

This article presents the training modules which have been designed for training organisations of the Plan Mobilisateur TIC in Wallonia. This training device aims to introduce the internet to insecure ... [more ▼]

This article presents the training modules which have been designed for training organisations of the Plan Mobilisateur TIC in Wallonia. This training device aims to introduce the internet to insecure unemployed people. The authors will try to show how online learning devices have followed the evolution of digital divide between 2002 and 2012. [less ▲]

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See detailInfluenţa fertilizării minerale asupra producţiei la amestecul de lucernă şi golomăţ în anul III de vegetaţie
Muntianu, Iulian Constantin; Stavarache, Mihai; Ciobanu, Ciprian et al

in Ţenu, Ioan; Vîntu, Vasile; Jităreanu, Gerard (Eds.) Durable Agriculture and Food Security – Priority objectives in research activity of the Ph.D. students from the UASVM Iasi (2012, December 07)

This study was conducted during three production cycles of the third year of vegetation. The main objective was to determine the production of dry matter (DM) and crude protein (CP) made under the ... [more ▼]

This study was conducted during three production cycles of the third year of vegetation. The main objective was to determine the production of dry matter (DM) and crude protein (CP) made under the influence of mixture and fertilization with nitrogen on P50 agrofond to alfalfa and orchard grass. To achieve these objectives, three variants of mixture were tested between alfalfa and cocksfoot that were applied to four rates of mineral fertilizers. The mixture 75% alfalfa (Medicago sativa L.) and 25% orchard grass (Dactylis glomerata L.) under the effect of dosing with N100P50achieved the highest production increase of DM on cycle I, 108% (5.24 Mg haDM) compared to the control, unfertilized alfalfa in pure culture (4.85 Mg ha DM). The highest increase forthe CP yield was obtained on cycle I from the 100% alfalfa fertilized with doses of N-1-1100P50, 122% (1230 kg haCP) from 100% alfalfa unfertilized (1009 kg ha CP). Alfalfa fertilized with N-1-1100P50 rate had the highest increases on total DM yield (106%, 10.64 Mg haDM) and on total quantity of CP(124%, 2304 kg ha CP). [less ▲]

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See detailDirect parameter identification in a model of the cardiovascular system
Pironet, Antoine ULg; Dauby, Pierre ULg; Desaive, Thomas ULg

in 11th Belgian Day on Biomedical Engineering (2012, December 07)

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See detailCan we use Electrical Resistivity Tomography to measure root zone moisture dynamics in fields with multiple crops?
Garré, Sarah ULg; Coteur, Ine; Wongleecharoen, Chalemchart et al

in 2012 Scientific program (2012, December 07)

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See detailCalitatea lucernei sub influenţa fertilizării în condiţiile din silvostepa Moldovei
Stavarache, Mihai; Vîntu, Vasile; Samuil, Costel et al

in Ţenu, Ioan; Vîntu, Vasile; Jităreanu, Gerard (Eds.) Durable Agriculture and Food Security – Priority objectives in research activity of the Ph.D. students from the UASVM Iasi (2012, December 07)

The research conducted during 2011-2012, on the Ezăreni farm, has sought influence of fertilization on the leaves/stems ratio, crude protein content (CP), neutral detergent fiber content (NDF), acid ... [more ▼]

The research conducted during 2011-2012, on the Ezăreni farm, has sought influence of fertilization on the leaves/stems ratio, crude protein content (CP), neutral detergent fiber content (NDF), acid detergent fiber content (ADF) and relative feed value (RFV), of alfalfa (Medicago sativa L.) in the second and third year of vegetation, at the first cut. The studied experimental plots were v1- unfertilized (control plot), v2-N50P50, v3-N75P50 and v4-30 t/ha manure). The results showed that the fertilization negatively affected crude protein content of plants. Although the protein content of leaves was higher and that of strains was less affected, the leaves/stems ratio decided this indicator for plant production. Organic fertilization showed a highly significant positive effect on the content of plant leaves and stems in NDF and ADF. [less ▲]

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See detailnon invasive estimation of left atrial pressure and mitral valve area waveforms during an entire cardiac cycle
Paeme, Sabine ULg; Pironet, Antoine ULg; LANCELLOTTI, Patrizio ULg et al

in proceeding of 11th national day of the National Committee on Biomedical Engineering (2012, December 07)

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See detailINFLUENCE OF MYELOPEROXIDASE ACTIVITY ON EQUINE POST-THAW SEMEN QUALITY
Ponthier, Jérôme ULg; Franck, Thierry ULg; Parrilla Hernandez, Sonia ULg et al

in Edeas, Marvin (Ed.) Proceedings of the 2nd ISANH World congress on Fertility and Antioxidants (2012, December 06)

This study confirms that active MPO is associated with cellular fraction of the ejaculate, as previously suggested for total MPO concentration in thawed semen (2). However, active MPO concentrations were ... [more ▼]

This study confirms that active MPO is associated with cellular fraction of the ejaculate, as previously suggested for total MPO concentration in thawed semen (2). However, active MPO concentrations were dramatically lower than total MPO concentrations observed in equine semen (3), which could be explained by presence of inactive MPO subunits in semen. MPO activity in sperm-rich pellet can be used as a predictive marker of post-thaw semen quality. Moreover, methods to inhibit MPO should be investigated in semen. [less ▲]

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See detailHydrodynamique et Architecture Navale
Hage, André; Rigo, Philippe ULg; Lapy, Matthieu ULg

in Journées scientifiques et techniques du CETMEF 2012 (2012, December 05)

State of art en matière d'hydrodynamique navale et architecture navale pour la navaigatio nfluviale

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See detailSignatures of rotation in oscillation spectra
Reese, Daniel ULg; Prat, V.; Barban, C. et al

in Boissier, S.; de Laverny, P.; Nardetto, N. (Eds.) et al SF2A-2012: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics (2012, December 01)

Rotation makes oscillation spectra of rapidly rotating stars much more complicated. Hence, new strategies need to be developed in order to interpret such spectra. In what follows, we describe how multi ... [more ▼]

Rotation makes oscillation spectra of rapidly rotating stars much more complicated. Hence, new strategies need to be developed in order to interpret such spectra. In what follows, we describe how multi-colour photometric mode visibilities can be generalised to rapidly rotating stars, while fully taking into account centrifugal deformation and gravity darkening. We then go on to describe some first results as well as a strategy for constraining mode identification. [less ▲]

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See detailI-see-3D! An Interactive and Immersive System that dynamically adapts 2D projections to the location of a user’s eyes
Pierard, Sébastien ULg; Pierlot, Vincent ULg; Lejeune, Antoine ULg et al

in International Conference on 3D Imaging (IC3D) (2012, December)

This paper presents a system that gives the illusion of a 3D immersive and interactive environment with 2D projectors. The user does not need to wear glasses, nor to watch a (limited) screen. The virtual ... [more ▼]

This paper presents a system that gives the illusion of a 3D immersive and interactive environment with 2D projectors. The user does not need to wear glasses, nor to watch a (limited) screen. The virtual world is all around him, drawn on the floor. As the user is himself immersed in the virtual world, there is no need for a proxy like an avatar; he can move inside the virtual environment freely. Moreover, the Isee-3D system allows a user to manipulate virtual objects with his own body, making interactions with the virtual world very intuitive. Giving the illusion of 3D requires to render images insuch a way that the deformation of the image projected on thefloor is taken into account, as well as the position of the user’s “eye” in its virtual world. The resulting projection is neither perspective nor orthographic. Nevertheless, we describe how thiscan be implemented with the standard OpenGL pipeline, without any shader. Our experiments demonstrate that our system is effective in giving the illusion of 3D. Videos showing the results obtained with our I-see-3D system are available on our website http://www.ulg.ac.be/telecom/projector [less ▲]

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See detailL'eLearning et les femmes : retour d'expérience. Une étude exploratoire auprès de 22 femmes
Lesire, Catherine ULg; Géron, Stéphanie ULg; Georges, François ULg

in Paliard, C.; Nkambou, R.; Narce, C. (Eds.) et al Actes du 8ème Colloque Technologies de l’Information et de la Communication pour l’Enseignement: Intégration Technologique et Nouvelles Perspectives d’Usage (2012, December)

Who are the women who learn online ? Why and in which circumstances have they chosen to learn online ? Have they taken advantage of this experience ? In this article, we speak about the exploratory survey ... [more ▼]

Who are the women who learn online ? Why and in which circumstances have they chosen to learn online ? Have they taken advantage of this experience ? In this article, we speak about the exploratory survey carried out with 22 women to know their motivation in online courses, what they did during those courses and what they remember of their experience. We also wanted to know whether eLearning gave women the opportunity to learn and to be trained even when they have a lot of responsabilities and sometimes little time to learn. [less ▲]

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See detailMorpho-structural analysis and mass movements Case study of Oued El Kaïm reservoir dam Nort-East Algeria
Draidia, Salah ULg; Havenith, Hans-Balder ULg; Benabbas, Chaouki

in Annual International Conference on Geological & Earth sciences_GEOS-2013 (2012, December)

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See detailThe usefulness of CPTs for deterministic, spatially heterogeneous, large-scale aquitard parametrisation
Rogiers, Bart; Mallants, Dirk; Batelaan, Okke et al

in Oswald, S.E.; Kolditz, O.; Attinger, S. (Eds.) Models - Repositories of Knowledge (2012, December)

Aquitards can be effectively parameterised and incorporated in a groundwater flow model by using standard cone penetration tests (CPTs). Several conceptually different realizations of an aquitard’s ... [more ▼]

Aquitards can be effectively parameterised and incorporated in a groundwater flow model by using standard cone penetration tests (CPTs). Several conceptually different realizations of an aquitard’s hydraulic conductivity field were evaluated based on: (i) conventional methods of soil behaviour type classification, (ii) recent relationships from the literature, and (iii) novel site-specific relations with hydraulic conductivity. We show that use of most of these CPT-based hydraulic conductivity estimations in groundwater flow modelling effectively enhance model performance based on absolute head values and gradients across the aquitard. Conceptual models that considered a spatially heterogeneous hydraulic conductivity for the aquitard performed better than the reference case with a uniform aquitard hydraulic conductivity. However, the hydraulic conductivity of thin heavy clay lenses, characteristic of the aquitard present in our study area, cannot be captured using these continuum approaches. The latter leads to a bias in the direct hydraulic conductivity predictions; an alternative is to invoke inverse modelling with the heterogeneous parameter fields. To address this issue, the concept of the boundary energy associated with the CPT signal is also introduced for characterising the presence of heavy clay lenses. Overall, the CPT-based concepts provide more accurate, robust, and high-resolution data-based parameterisation of the studied aquitard. [less ▲]

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See detailPolarization Holography with liquid crystals polymers and applications
Piron, Pierre ULg; Blain, Pascal ULg; Habraken, Serge ULg et al

in International Conference on Fibre Optics and Photonics (2012, December)

Liquid Crystals Polymers are birefringent molecules locally orientable. By recording the polarization pattern due to the overlap of differently polarized beams on LCP, space-variant retarders are realized ... [more ▼]

Liquid Crystals Polymers are birefringent molecules locally orientable. By recording the polarization pattern due to the overlap of differently polarized beams on LCP, space-variant retarders are realized. We present two applications polarization holography and coronagraphy. [less ▲]

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See detailÉtude comparative de la répartition des matières et des apprentissages en langues anciennes dans l’enseignement francophone européen
Pietquin, Paul ULg

in Dufays, J.-L.; Carlier, Gh.; De Kesel, Myriam (Eds.) et al Progression et transversalité. Comment (mieux) articuler les apprentissages dans les disciplines scolaires ? (2012, December)

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See detailQuantifying and Mitigating IGMP Filtering in Topology Discovery
Marchetta, Pietro; Mérindol, Pascal; Donnet, Benoît ULg et al

in IEEE Global Communications Conference (GLOBECOM) (2012, December)

Recent developments in router level topology discovery have suggested the introduction of IGMP probing in addition to standard techniques such as traceroute and alias resolution. With a single IGMP probe ... [more ▼]

Recent developments in router level topology discovery have suggested the introduction of IGMP probing in addition to standard techniques such as traceroute and alias resolution. With a single IGMP probe, one can obtain all multicast interfaces and links of a multicast router. If such a probing is a promising approach, we noticed that IGMP probes are subject to filtering, leading so to the fragmentation of the collected multicast graph into several disjoint connected components. In this paper, we cope with the fragmentation issue. Our contributions are threefold: (i) we experimentally quantify the damages caused by IGMP filtering on collected topologies of large tier-1 ISPs; (ii) using traceroute data, we construct a hybrid graph and estimate how far each IGMP fragment is from each other; (iii) we provide and experimentally evaluate a recursive approach for reconnecting disjoint multicast components. The key idea of the third contribution is to recursively apply alias resolution to reassemble disjoint fragments and, thus, progressively extend the mapping of the targeted ISP. Data presented in the paper, as well as reconstructed topologies, are freely available at http://svnet.u-strasbg.fr/merlin. [less ▲]

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See detailA Review of Recent Case Studies of Landslides Investigated in the Tien Shan Using Microseismic and Other Geophysical Methods
Torgoev, Almazbek ULg; Lamair, Laura ULg; Torgoev et al

in Ugai, K; Wakai, A; Yagi, H (Eds.) Proceedings of the International Symposium on Earthquake-induced landslides (2012, December)

This paper reviews recent case studies completed on landslides (and dams) with probable (post-) seismic origin or susceptible to seismic failure in the Tien Shan, Central Asia. The first investigation ... [more ▼]

This paper reviews recent case studies completed on landslides (and dams) with probable (post-) seismic origin or susceptible to seismic failure in the Tien Shan, Central Asia. The first investigation presented here was carried out in 2005 on the Kainama earthflow, mainly composed of loess, which occurred in April 2004 and killed 33 people. Geophysical and seismological were used to build a reliable 3D model of the geometry and properties of the subsurface layers. The paper will also present results from microseismic measurements on loess landslides in Tajikistan that partly have a seismic origin. They are located close to the area that was affected in 1949 by the M=7.4 Khait earthquake and the numerous landslides triggered during the event, including the Khait rock avalanche. [less ▲]

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See detailValidated Extraction of Gait Events from 3D Accelerometer Recordings
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Stamatakis, Julien et al

in IEEE International Conference on 3D Imaging (IC3D) (2012, December)

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless ... [more ▼]

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless accelerometers and a signal processing algorithm. This system automatically extracts relevant gait events such as the heel strikes (HS) and the toe-offs (TO), which characterize the stance and the swing phases of walking. The performances of the low-cost accelerometer hardware and related algorithm have been compared to those obtained by a kinematic 3D analysis system and a force plate, used as gold standard methods. The HS and TO times obtained from the gait data of 7 healthy volunteers (147 trials) have been found to be (mean ± standard deviation) 0.42±7.92 ms and 3.11±10.08 ms later than those determined by the force plate, respectively. The experimental results demonstrate that the new hardware and associated algorithm constitute an effective low-cost gait analysis system, which could thus be used for the assessment of mobility in routine clinical practice. [less ▲]

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See detailCarrying capacity of stainless steel columns in the low slenderness range
Rossi, Barbara ULg; Rasmussen, Kim J.R.

in 6th International Conference on Coupled Instabilities in Metal Structures : CIMS, Glasgow 3-5 December 2102 (2012, December)

In European standards, for Class 4 cross-sections, the Effective Width Method (EWM) must be used to account for the effect of local buckling. Because of the complexity of this method, other methods have ... [more ▼]

In European standards, for Class 4 cross-sections, the Effective Width Method (EWM) must be used to account for the effect of local buckling. Because of the complexity of this method, other methods have been developed, such as the Direct Strength Method (DSM) for cold-formed thin-walled profiles and the Continuous Strength Method (CSM), initially established for members made of stainless steels. To a large extent, the CSM yield accurate predictions, especially in the low slenderness range where the current DSM design procedure tends to produce conservative results, for materials with pronounced strain hardening. The present paper presents an extension of the DSM which provides accurate strength predictions in the low slenderness range for stainless steel thin-walled section columns failing by distortional, local and overall buckling. [less ▲]

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See detailInsulin clearance during hyper-insulinemia euglycemia therapy
Penning, Sophie ULg; MASSION, Paul ULg; Pretty, Christopher ULg et al

in Proceedings of the 11th Belgian Day on Biomedical Engineering (2012, December)

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See detailModel-based glycemic control in critical care
Pretty, Christopher ULg; Penning, Sophie ULg; Le Compte, Aaron J. et al

in Proceedings of the 11th Belgian Day on Biomedical Engineering (2012, December)

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See detailParametric numerical study of seismic slope stability and verification of the Newmark method
Torgoev, Almazbek ULg; Havenith, Hans-Balder ULg

in Ugai, K; Wakai, A; Yagi, H (Eds.) Proceedings of the International Symposium on Earthquake-induced landslides, Kiryu, Japan, 2012 (2012, December)

2D dynamic modelling of seismic slope stability is applied to a landslide-prone area in Central Asia, the Mailuu-Suu Valley, situated in the south of Kyrgyzstan. The calculations are made with models ... [more ▼]

2D dynamic modelling of seismic slope stability is applied to a landslide-prone area in Central Asia, the Mailuu-Suu Valley, situated in the south of Kyrgyzstan. The calculations are made with models constructed from over 30 profiles located in the target area, presenting different geological, tectonic and morphological settings. One part of the profiles were selected within landslide zones, the other part was selected in stable areas. Many of the landslides are complex slope failures involving falls, rotational sliding and/or planar sliding and flows. These input data were extracted from a 3D structural geological model built with the GOCAD software. Geophysical and geomechanical parameters were defined on the basis of results obtained by multiple surveys performed in the area over the past 15 years. These include geophysical investigation, seismological experiments and ambient noise measurements. Dynamic modelling of slope stability is performed with the UDEC version 4.01 software that is able to compute deformation of discrete elements. Inside these elements both elasto-plastic and purely elastic materials (similar to rigid blocks) were tested. Various parameter variations were tested to assess their influence on the final outputs. For a few models groundwater flow is included. The total parametric study involved more than 100 different models (about 800 computation hours). [less ▲]

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See detailThe rabbit left ventricle modeling at the cellular scale: application to flow-clamp experiments
Kosta, Sarah ULg; Pironet, Antoine ULg; Dauby, Pierre ULg

in Proceedings of the 11th Belgian National Day on Biomedical Engineering (2012, December)

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See detailOptimal discovery with probabilistic expert advice
Bubeck, Sébastien; Ernst, Damien ULg; Garivier, Aurélien

in Proceedings of the 51st IEEE Conference on Decision and Control (CDC 2012) (2012, December)

Motivated by issues of security analysis for power systems, we analyze a new problem, called optimal discovery with probabilistic expert advice. We address it with an algorithm based on the optimistic ... [more ▼]

Motivated by issues of security analysis for power systems, we analyze a new problem, called optimal discovery with probabilistic expert advice. We address it with an algorithm based on the optimistic paradigm and the Good-Turingmissing mass estimator. We show that this strategy attains the optimal discovery rate in a macroscopic limit sense, under some assumptions on the probabilistic experts. We also provide numerical experiments suggesting that this optimal behavior may still hold under weaker assumptions. [less ▲]

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See detailAntiwindup regulation of saturated linear systems
Forni, Fulvio ULg; Zaccarian, Luca; Sepulchre, Rodolphe ULg

in 51st IEEE Conference on Decision and Control (2012, December)

We consider the output regulation problem for linear systems subject to actuators saturation. A state-feedback unconstrained regulator is transformed into an error-feedback bounded regulator by ... [more ▼]

We consider the output regulation problem for linear systems subject to actuators saturation. A state-feedback unconstrained regulator is transformed into an error-feedback bounded regulator by introducing an observer which is then decomposed into the sum of "unconstrained" and "antiwindup" dynamics. The unconstrained dynamics are regulated towards a predefined reference trajectory, by a control signal u which may violate the saturation bounds during transients. The antiwindup dynamics transiently store the mismatch between unconstrained and constrained dynamics. The antiwindup design also applies to a predefined error-feedback dynamic regulator for the unconstrained system, as in standard antiwindup setting. As a particular case of distinct interest, the design provides a new global asymptotic stabilizer for saturated null-controllable systems. [less ▲]

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See detailKick synchronization versus diffusive synchronization
Mauroy, Alexandre ULg; Sacré, Pierre ULg; Sepulchre, Rodolphe ULg

in Proceedings of the 51st IEEE Conference on Decision and Control (2012, December)

The paper provides an introductory discussion about two fundamental models of oscillator synchronization: the (continuous-time) diffusive model, that dominates the mathematical literature on ... [more ▼]

The paper provides an introductory discussion about two fundamental models of oscillator synchronization: the (continuous-time) diffusive model, that dominates the mathematical literature on synchronization, and the (hybrid) kick model, that accounts for most popular examples of synchronization, but for which only few theoretical results exist. The paper stresses fundamental differences between the two models, such as the different contraction measures underlying the analysis, as well as important analogies that can be drawn in the limit of weak coupling. [less ▲]

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See detailRéduction des troubles électrolytiques chez les prématurés <1250g
SENTERRE, Thibault ULg

in Storme, laurent (Ed.) Livres des communications. 18ème Journées Francophones de Recherche en Néonatologie (2012, December)

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See detailCréation d'un outil d'évaluation de la durabilité des productions de qualité différenciée en Wallonie
Picron, Pascale ULg; Boudry, Christelle ULg; Lagneaux, Séverine et al

in 12ème Journée d'étude des productions porcines et avicoles (2012, November 28)

L’objectif de cette étude est de comparer simultanément l’impact environnemental, social et économique liés à l’application de différents critères de qualités différenciées. L’outil développé s’articule ... [more ▼]

L’objectif de cette étude est de comparer simultanément l’impact environnemental, social et économique liés à l’application de différents critères de qualités différenciées. L’outil développé s’articule autour de la modélisation des impacts environnementaux d’après la méthodologie ACV et s’appuie sur des matrices techniques (MT) pour l’évaluation sociale et économique. D’un point de vue opérationnel, il s’agit de développer un outil de simulation qui répond aux cahiers des charges minimaux de la qualité différenciée à travers le paramétrage réalisé par l’utilisateur final de l'application. Le modèle est implémenté dans l’environnement de programmation MATLAB R2011a (MathWorks, Natick, MA, USA). [less ▲]

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See detailExamen andrologique de l'étalon - Badanie andrologiczne ogiera
Ponthier, Jérôme ULg

in Gajewski, Zdzislaw (Ed.) Rosrod Koni II - wybrane problemy (2012, November 24)

QualityThe andrological examination is the main procedure to predict the breeding performance. It includes clinical examination as well as additionnal methods. The general health status, libido and the ... [more ▼]

QualityThe andrological examination is the main procedure to predict the breeding performance. It includes clinical examination as well as additionnal methods. The general health status, libido and the reproductive tract status has to be precisely evaluated. However, the final assessment has to be established trough the results of these analysis. [less ▲]

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See detailThe nuclear physics of OHe
Cudell, Jean-René ULg; Khlopov, Maxim; Wallemacq, Quentin ULg

in Mankoc (Ed.) Proceedings of the 15th Bled Workshop "What Comes Beyond the Standard Models" (2012, November 24)

A recent composite-dark-matter scenario assumes that the dominant fraction of dark matter consists of O-helium (OHe) dark atoms, in which a lepton-like doubly charged particle O is bound with a primordial ... [more ▼]

A recent composite-dark-matter scenario assumes that the dominant fraction of dark matter consists of O-helium (OHe) dark atoms, in which a lepton-like doubly charged particle O is bound with a primordial helium nucleus. It liberates the physics of dark matter from unknown features of new physics, but it demands a deep understanding of the details of known nuclear and atomic physics, which are still unclear. Here, we consider in detail the physics of the binding of OHe to various nuclei of interest for direct dark matter searches. We show that standard quantum mechanics leads to bound states in the keV region, but does not seem to provide a simple mechanism that stabilizes them. The crucial role of a barrier in the OHe-nucleus potential is confirmed for such a stabilization. [less ▲]

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See detailIntérêt du Start Back Screening Tool pour les médecins généralistes
Demoulin, Christophe ULg; Mahieu, Geneviève; Hill, JC et al

in Abstract Book of 6th Biennial Congress Belgian Back Society (2012, November 17)

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See detailValidity of a new self-administered questionnaire assessing back posture habits
Demoulin, Christophe ULg; Martin, E.; GROSDENT, Stéphanie ULg et al

in Abstract Book of 6th Biennial Congress Belgian Back Society (2012, November 17)

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See detailOptimization of the formation of vinyldithiins, a therapeutic compound from garlic
DETHIER, Bérénice ULg; Hanon, Emilien; Fauconnier, Marie-Laure ULg

in Pulkrabova, Jana; Tomaniova, Monika; Godulova, Vanda (Eds.) et al Chemical reactions in food: book of abstracts (2012, November 14)

Garlic has been used worldwide for centuries for its taste, but also for its health benefits. The therapeutic compounds are mostly organosulfurs, and can be formed when an enzyme, alliinase, gets in ... [more ▼]

Garlic has been used worldwide for centuries for its taste, but also for its health benefits. The therapeutic compounds are mostly organosulfurs, and can be formed when an enzyme, alliinase, gets in contact with its substrate, alliin. Both are separated in an entire cell, and react when the plant is damaged. The product of the enzymatic reaction, allicin, turns quickly into different molecules with potential beneficial effects. The way garlic is processed has a major influence on the released products. Indeed, an aqueous or oily medium, as far as the temperature, can emphasize the formation of specific compounds. Vinyldithiins are one of the active molecules, and are part of the garlic’s organoleptic properties. Their effects against obesity have been recently proven. This study aims to describe the conditions of vinyldithiins formation, as well as its extraction, purification and analyse. Vinyldithiins are mostly produced when garlic is crushed in edible oil, at low temperature. Extraction conditions (garlic/oil ratio, oil and garlic source, temperature and extraction time) were optimized. Analysis of the results were performed by HPLC.Finally, a purification process was set up. These results allow better knowledges on vinyldithiins formation that can be applied in garlic-based nutraceuticals. They might also lead to new uses of garlic in the production of highly valuable compounds. [less ▲]

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See detailUne approche basée objet combinée avec les classificateurs avancés (SVM, RF, RN) pour la détection des changements du bâti.
El Mansouri, Loubna ULg

in Proceding of Spatial Analysis and GEOmatics 2012 (2012, November 09)

L'objectif de cet article est de développer une méthodologie automatique pour la détection des changements du bâti en milieu urbain. L'approche est basée sur la comparaison entre un plan existant et une ... [more ▼]

L'objectif de cet article est de développer une méthodologie automatique pour la détection des changements du bâti en milieu urbain. L'approche est basée sur la comparaison entre un plan existant et une image à très haute résolution spatiale(THRS) récente. Elle s'enchaine sur 4 étapes. Premièrement l'image est segmentée pour produire des primitives. La sélection des attributs est faite ensuite quantitativement par l'algorithme MrMR, basé sur l'information mutuelle. Des classificateurs par apprentissage supervisé avancés ont été utilisés dans l'étape de la classification (SVM, Ensembles d'arbres de décision et Réseaux de Neurones). La prédiction finale des objets est déduite par un système de vote à partir des 3 meilleurs classificateurs. Enfin, une étape de détection de changements permet d'identifier les segments qui représentent les changements du bâti. Les données utilisées concernent la ville de Rabat (Maroc). Une image QuickBird a été utilisée avec un plan existant à l'échelle 1:10,000. Indépendamment de la qualité de la forme des bâtiments détectés, la méthode offre des meilleurs taux en complétude (95%) et en bonne détection (83%) [less ▲]

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See detailSpécificités des dégradations dans les bétons du patrimoine
Courard, Luc ULg; Lejeune, Astrid ULg

in Conservation et restauration des bétons du patrimoine moderniste (2012, November 09)

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See detailOptimum design of low-cost housing in developing countries using nonsmooth simulation-based optimization
Nguyen, Anh Tuan ULg; Reiter, Sigrid ULg

in Proceedings of the 28th International PLEA Conference (2012, November 07)

An optimum design of Low-cost housing (LCH) offers low-income urban inhabitants great opportunities to obtain a shelter at affordable price and acceptable indoor thermal conditions. In the present study ... [more ▼]

An optimum design of Low-cost housing (LCH) offers low-income urban inhabitants great opportunities to obtain a shelter at affordable price and acceptable indoor thermal conditions. In the present study, the design and operation of a low cost dwelling were numerically optimized using simulation-based approach in which a dynamic building simulation program (EnergyPlus) was coupled with the optimization engine (GenOpt). Three multi-objective cost functions which include construction cost, indoor thermal comfort and 50-year operating cost were applied for naturally ventilated (NV) and air-conditioned (AC) buildings. Optimization problem which consists of 18 building parameters combined with 6 ventilation strategies was examined by two population-based optimization algorithms (Particle Swarm optimization and Hybrid algorithm) to find optimum combinations among these variables. The results show that the design requirements of NV and AC dwellings are not quite similar, and in a few categories, even contradictory. Optimum design corresponding to each cost function was outlined. Results of this paper also show great potential of optimization in comfort improvement, energy saving, life cycle cost, up to 40%. [less ▲]

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See detailUse of Life Cycle Assessment to determine the environmental impact of thermochemical conversion routes of lignocellulosic biomass: state of the art
Gerbinet, Saïcha ULg; Léonard, Angélique ULg

in LCA conference 2012 - Proceeding of the 2nd international conference on life cycle approaches (2012, November 07)

The biomass is a promising way to substitute fossil fuels. Lignocellulosic biomass valorisation is part of second generation technologies. They are interesting in that they imply less competition with ... [more ▼]

The biomass is a promising way to substitute fossil fuels. Lignocellulosic biomass valorisation is part of second generation technologies. They are interesting in that they imply less competition with food crops for land and water, and they allow for the whole plant to be processed. Moreover, lignocellulose is abundant in cheap and non-food materials extracted from plants such as wood and energy crops. The thermo-chemical route is being considered more extensively, especially the gasification process. This process converts carbonaceous biomass into combustible gases (CO, H2, CO2, CH4, and impurities) called syngas in the presence of a suitable oxidant. The syngas can be converted into a large range of products, such as diesel, via a Fischer-Tropsch process, or methanol, used for producing DME (dimethyl ether), both of which can serve as fuels in traditional motors. Syngas can also be used to produce ethylene and propylene, two building blocks for the chemical industry. Production of these four compounds is specifically investigated. In order to insure that, under the principle of sustainability, the use of lignocellulosic biomass is a viable alternative, its environmental impact must be accurately quantified. The Life Cycle Assessment (LCA) methodology will be used in this regard for the gasification process. The gasification technology will be described, and a state of the art in LCA of the gasification process will be presented. Finally, the need for new research will be established. [less ▲]

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See detailLife Cycle Assessment of an artisanal Belgian blond beer
Melon, Raphaëlle ULg; Wergifosse, Vincianne; Renzoni, Roberto ULg et al

in [avniR] editions (Ed.) Proceedings of the 2nd International Conference on life cycle approaches (2012, November 06)

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See detailThe effects of hull modification on design parameters of medium speed monohuhll passenger ferries
Hetharia, Wolter; Rigo, Philippe ULg; Hage, André ULg

in ICSOT : Developments in ship design & construction (2012, November 01)

Developments in ship design & construction

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See detailA "new" design requirement: the mitigation of the progressive collapse of buildings under exceptional loading
Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg

in Proceedings of the First International Conference of Civil Engineering (2012, November)

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under an exceptional event. According to the Eurocodes and ... [more ▼]

Recent events such as natural catastrophes or terrorism attacks have highlighted the necessity to ensure the structural integrity of buildings under an exceptional event. According to the Eurocodes and some different other national design codes, the structural integrity of civil engineering structures should be ensured through appropriate measures but, in most cases, no precise practical guidelines on how to achieve this goal are provided. At Liège University, the robustness of building frames is investigated with the final objective to propose design requirements to mitigate the risk of progressive collapse considering the conventional scenario “loss of a column” further to an unspecified event. In particular, a complete analytical procedure has been developed for the verification of the robustness of steel or composite plane frames. For sake of simplicity, these first works have been based on the assumption that the dynamic effects linked to the column loss were limited and could therefore be neglected. More recently, complementary works have been carried out with the objective to address the dynamic effects. Besides that, the extension of the static procedure to actual 3D frames is under investigation in Liège. The present paper gives a global overview of the ongoing researches in the field of robustness at Liège University; in particular, the global strategy to derive design requirements is detailed. [less ▲]

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See detailWhat is the best use of sugar crops? Environmental assessment of two applications : biofuels vs. bioproducts
Belboom, Sandra ULg; Léonard, Angélique ULg

in [avniR] editions (Ed.) LCA Conference 2012 - Proceedings of the 2nd international conference on life cycle approaches (2012, November)

Agricultural crops became through years a possibility to increase European energy independence. Brazil has taken this opportunity since the seventies by using sugar cane bioethanol as vehicle fuel. The ... [more ▼]

Agricultural crops became through years a possibility to increase European energy independence. Brazil has taken this opportunity since the seventies by using sugar cane bioethanol as vehicle fuel. The development of biofuels production is more recent in Europe. Due to temperate climates, bioethanol production is mostly based on wheat and sugar beet, this latter being considered as the ‘equivalent’ sugar crop to sugar cane for Europe. Biofuel is the most common application of bioethanol but its transformation into bioethylene through a dehydration step can be an alternative as already found in Brazil. This paper will consider both potential uses and compare them using Life Cycle Assessment methodology. Common boundaries of the systems comprise the cultivation step for both crops, i.e. sugar cane and sugar beet, with all associated energetic and fertilizer consumptions, the transportation step from field to the industrial plant, the sugar crops transformation into hydrate bioethanol and the by-products valorisation. For the biofuel scenario, a dehydration step using molecular sieve is added to get anhydrous bioethanol. For the bioethylene scenario, an industrial dehydration step is added. Direct comparison between both scenarios is not possible due to different products uses. The comparison was then performed for both scenarios between the bio-based product and its fossil equivalent. ReCiPe 2008 method was used to get the environmental impacts. As expected, the impact of bio-based products in climate change and fossil fuel depletion categories decreases compared to the fossil counterparts. For other categories, difference is less significant and results are often better for fossil products. Land use change category was implemented to assess its importance. Depending on assumptions, the greenhouse gas emissions from crop implementation on a natural land can counteract the previous mentioned benefits. This study shows the importance of assumptions, especially in the agricultural field, on the obtained results. [less ▲]

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See detailPlant growth- promoting rhizobacteria emit volatiles compounds with biostimulation activity in dicot and monocot plant species.
du Jardin, Patrick ULg; Delaplace, Pierre ULg; Varin, Sébastien et al

in Perata, Pierdomenico; Brown, Patrick; Ponchet, Michel (Eds.) Abstracts Book for Oral and Poster Presentations of the 1st World Congress on the use of Biostimulants in Agriculture (2012, November)

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See detailPerformances isocinétiques et risque lésionnel de l’épaule chez le joueur de handball de haut niveau
Forthomme, Bénédicte ULg; Schiettecatte, Delphine; GAULT, Clément ULg et al

in Abstract book des XIVèmes Rencontres isocinétiques MEDIMEX / ROTHSCHILD (2012, November)

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See detailMéthodologie d’excitation de modes à diamètres nodaux d’un anneau statorique de turboréacteur
Nyssen, Florence ULg; Golinval, Jean-Claude ULg; Simon, Daniel et al

in Serra, Roger (Ed.) 3ième Colloque "Analyse Vibratoire Expérimentale" (2012, November)

Cette étude consiste à développer une approche expérimentale, permettant l’isolation de modes à diamètres nodaux spécifiques d’un étage statorique de compresseur basse pression, ayant pour objectif final ... [more ▼]

Cette étude consiste à développer une approche expérimentale, permettant l’isolation de modes à diamètres nodaux spécifiques d’un étage statorique de compresseur basse pression, ayant pour objectif final la calibration de jauges de déformation. Plus spécifiquement, une étude portant sur le nombre minimal de sources d’excitation (shakers) et sur leur répartition circonférentielle optimale a été menée, l’objectif suivi étant d’isoler des modes à diamètres cibles dans des conditions de laboratoire. La première partie de l’étude consiste en une approche théorique, basée sur les concepts d’appropriation modale en régime forcé. La combinaison optimale des positions des différents points d’excitation est choisie de façon à maximiser une fonction objectif, définie comme le rapport entre l’énergie injectée dans le mode cible et la valeur maximale des énergies injectées dans les modes présentant une fréquence naturelle proche du mode d’intérêt. Dans la deuxième partie de l’étude, des simulations numériques sur un modèle éléments finis de la structure ont été menées sur base des résultats théoriques obtenus. Enfin, la troisième partie a permis de valider expérimentalement les prédictions numériques via des analyses d’influence du nombre d’excitateurs et de leur position sur l’amplitude de la réponse fréquentielle. [less ▲]

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See detailAccurate h-Conform Finite Element Model of Multiply Connected Thin Regions via a Subproblem Method
Dang, Quoc Vuong ULg; Dular, Patrick ULg; Vazquez Sabariego, Ruth ULg et al

in Proceedings of the 15th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2012) (2012, November)

A subproblem method for solving eddy current finite element is developed to correct the inaccuracies near edges and corners arising from thin shell models. Such models replace thin volume regions by ... [more ▼]

A subproblem method for solving eddy current finite element is developed to correct the inaccuracies near edges and corners arising from thin shell models. Such models replace thin volume regions by surfaces but neglect border effects in the vicinity of their edges and corners. A thin shell solution, performed by a simplified mesh near the thin structures, serves as a source of a correction problem consisting of the actual volume thin regions alone and concentrating the meshing effort on the thin regions. The general case of multiply connected thin regions is considered. [less ▲]

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See detailDetecting Consciousness with a Brain-computer Interface
Noirhomme, Quentin ULg; Lesenfants, Damien ULg; Lehembre, Remy ULg et al

in Pons, J. L.; Torricelli, D.; Pajaro, M. (Eds.) Converging Clinical and Engineering Research on Neurorehabilitation (2012, November)

Recent electrophysiological and neuroimaging studies showed command-specific changes in EEG or fMRI signals of unresponsive patients providing motor-independent evidence of conscious thoughts. These ... [more ▼]

Recent electrophysiological and neuroimaging studies showed command-specific changes in EEG or fMRI signals of unresponsive patients providing motor-independent evidence of conscious thoughts. These promising results have paved the way for a new application for Brain-computer Interface (BCI): detecting consciousness in patients with disorders of consciousness (DOC). In the present abstract, we review the first results obtained by BCI-like applications in patients with DOC and discuss the challenges facing BCI research. We believe that patients with DOC may benefit from BCI based diagnosis. BCIs may detect changes in the signal in response to command and, in some cases, may permit communication. [less ▲]

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See detailComputational Homogenization for Laminated Ferromagnetic Cores in Magnetodynamics
Niyonzima, Innocent ULg; Vazquez Sabariego, Ruth ULg; Henrotte, François et al

in Proceedings of the 15th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2012) (2012, November)

In this paper, we investigate the modeling of fer- romagnetic multiscale materials. We propose a computational homogenization method based on the heterogeneous multiscale method (HMM) that includes eddy ... [more ▼]

In this paper, we investigate the modeling of fer- romagnetic multiscale materials. We propose a computational homogenization method based on the heterogeneous multiscale method (HMM) that includes eddy currents and hysteretic losses at the mesoscale. The HMM comprises: 1) a macroscale problem that captures the slow variations of the overall solution; 2) many microscale problems that allow to determine the constitutive law at the macroscale. As application example, a laminated iron core is considered. [less ▲]

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See detailTime-domain finite-element modelling of laminated iron cores – Large skin effect homogenization considering the Jiles-Atherton hysteresis model
Vazquez Sabariego, Ruth ULg; Niyonzima, Innocent ULg; Geuzaine, Christophe ULg et al

in Proceedings of the 15th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2012) (2012, November)

This paper deals with the incorporation of the Jiles- Atherton (J-A) hysteresis model in a time-domain finite-element homogenization technique for laminated iron cores. The separate discretization of each ... [more ▼]

This paper deals with the incorporation of the Jiles- Atherton (J-A) hysteresis model in a time-domain finite-element homogenization technique for laminated iron cores. The separate discretization of each lamination is avoided by using dedicated skin-effect basis functions, which also serve to interpolate the J- A hysteretic material law. As validation test case, a stacked ring core surrounded by a toroidal coil is considered. [less ▲]

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See detailAn overview of the microbenthic loop in Posidonia oceanica meadows: the good, the bad and the ugly
Pete, Dorothée ULg; Quattrocchi, Loïc; Velimirov, Branko et al

in Creed, J.C.; Oigman-Pszczol, S.S. (Eds.) Proceedings of the 10th International Seagrass Biology Workshop (ISBW10), 25- 30 November 2012, Armação dos Búzios, Brazil (2012, November)

Posidonia oceanica is an endemic seagrass of the Mediterranean Sea. The ecosystem based on this plant is essential from an ecological and economical point of view (commercial species, touristic activities ... [more ▼]

Posidonia oceanica is an endemic seagrass of the Mediterranean Sea. The ecosystem based on this plant is essential from an ecological and economical point of view (commercial species, touristic activities, oxygen production), though very sensitive to environmental perturbations. To detect those perturbations, scientists are trying to find more efficient ecological indicators. Most of the time, those indicators are based on the plant itself. Unfortunately, this seagrass does not react very quickly to perturbations so, when a reaction is noticed, it is often too late to prevent irremediable damages to the ecosystem. The sedimentary compartment of P. oceanica meadows has been less studied than the canopy level. However, it could be a good source of ecological indicators because it is the final container of all the pollution. In this framework, the microbenthic loop has been studied. It is a major subsystem of those meadows and encompasses organic matter, bacteria, microphytobenthos and meiofauna. As those organisms have a rapid turnover and stay almost all their life inside the sediment, they seemed good potential indicators. This presentation will show what is useful or not inside the sediment and more specifically inside the microbenthic loop. Results of a comparison between a fish farm and a reference location will be used, as well as in situ experiments (shading and sediment loading) and small spatial scale variations. At the end of this presentation, you will know what are the good, the bad and the ugly in the sedimentary compartment of a P. oceanica meadow. [less ▲]

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See detailHomogenisation of Windings and Laminations in Time-Domain Finite-Element Modeling of Electrical Machines
Gyselinck, Johan; Geuzaine, Christophe ULg; Vazquez Sabariego, Ruth ULg

in Proceedings of the 15th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC2012) (2012, November)

This paper deals with time-domain homogenisation of multi-turn windings and laminated cores in 2D and 3D finite- element (FE) modelling of rotating electrical machines. Herein the number of additional ... [more ▼]

This paper deals with time-domain homogenisation of multi-turn windings and laminated cores in 2D and 3D finite- element (FE) modelling of rotating electrical machines. Herein the number of additional degrees of freedom (auxiliary field variables) in the homogenised regions can be fixed depending on the extent of the eddy current effects and on the desired accuracy. The homogenisation technique is illustrated and validated by means of a 2D model of a switched reluctance motor. Global quantities, such as the phase impedance, converge very well to those produced by a precise but very expensive 3D model. [less ▲]

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See detailDétection d'endommagement et résonances locales sur composite CFRP par vibrothermographie
Demy, Philippe ULg; Golinval, Jean-Claude ULg; Simon, Daniel

in Serra, Roger (Ed.) 3ième Colloque "Analyse Vibratoire Expérimentale" (2012, November)

La vibrothermographie est une technique de thermographie active capable de détecter des singularités de type délaminage ou décollement dans un matériau composite comme les laminés en fibres de carbone ... [more ▼]

La vibrothermographie est une technique de thermographie active capable de détecter des singularités de type délaminage ou décollement dans un matériau composite comme les laminés en fibres de carbone très utilisés actuellement en construction aéronautique (CFRP). Les causes physiques du mécanisme d'échauffement interne, suite à l'interaction avec les ondes élastiques, peuvent être la friction, l'hystérésis viscoélastique ou encore la déformation plastique. La méthode est efficace également sur des géométries complexes et requiert uniquement que les deux faces internes du délaminage soient libres de vibrer. Cette étude consiste à déterminer la relation entre l'échauffement observé et la fréquence d'une excitation sinusoïdale entre 8 et 27 kHz. Il apparaît clairement des pics d'échauffement pour certaines fréquences particulières. La comparaison avec les fréquences de résonance locale du défaut modélisé par éléments finis montre des similitudes avec l'apparition de certains de ces pics. Une étude expérimentale visant à exploiter la présence de ceux-ci montre l'intérêt d'un test vibrothermographique de type balayage rapide (chirp), dans l'optique de mettre sur pied un test court et fiable pour le contrôle non destructif de matériaux composites. [less ▲]

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See detailLa perception de la présence des investisseurs institutionnels publics dans la structure de capital des « Maisons de luxe » belges : le point de vue des entrepreneurs dirigeants
Riguelle, France ULg; Van Caillie, Didier ULg

in Finet, Alain, Monaco, Carole (Ed.) Les Investisseurs Institutionnels : diabolisation ou sacralisation ? (2012, November)

This contribution aims at proposing a synthetic review of the perceived interest for Belgian Luxury Houses of the presence of public institutional investors in their capital structure from the ... [more ▼]

This contribution aims at proposing a synthetic review of the perceived interest for Belgian Luxury Houses of the presence of public institutional investors in their capital structure from the entrepreneur's point of view. Our results highlight the duality of interests perceived by CEO's of Belgian luxury Houses. [less ▲]

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See detailAn online interactive tool for the energy assessment of residential buildings and transportation
Marique, Anne-Françoise ULg; de Meester, Tatiana; Reiter, Sigrid ULg

in Proceedings of PLEA 2012 (2012, November)

In the current context of increasing environmental awareness, energy efficiency is presented as a viable approach to the mitigation of climate change. In addition to public policies dealing with energy ... [more ▼]

In the current context of increasing environmental awareness, energy efficiency is presented as a viable approach to the mitigation of climate change. In addition to public policies dealing with energy efficiency, heightening public awareness on the impact of citizens’ lifestyles and behaviours is crucial and could quickly lead to significant reductions in the total energy consumption of a territory. This paper presents a new online interactive tool which enables citizens, local authorities and private developers (1) to assess energy consumption in the building and transportation sectors, at the individual and at the neighbourhood scales; (2) to compare them and (3) to find relevant and personalized hints to reduce their energy consumptions. Numerous methods and tools including a typological classification of buildings, thermal dynamic simulations, life-cycle assessments, statistical treatments of national censuses, etc. were used and combined to build the database used in the online interactive tool. This tool makes the main results of a scientific research accessible to a large non-specialized audience which is crucial in the scope of the sustainable development. Keywords: interactive tool, assessment methods, buildings, transportation, households, scientific popularization [less ▲]

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See detailLimitations of the current practice in neonatal PN across Europe
SENTERRE, Thibault ULg

in 3rd International Congress of Union of European Neonatal and Perinatal Societies (2012, November)

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See detailQualification d’un appareil d'éclairage décoratif soumis aux vibrations induites par un pont ferroviaire
Marin, Frédéric; Simon, Daniel; Golinval, Jean-Claude ULg

in Serra, Roger (Ed.) 3ième Colloque "Analyse Vibratoire Expérimentale" (2012, November)

Au même titre que la plupart des pièces mécaniques soumises aux vibrations, les appareils d'éclairage installés en extérieur sont amenés à satisfaire, en fonction de leurs conditions d’utilisation, aux ... [more ▼]

Au même titre que la plupart des pièces mécaniques soumises aux vibrations, les appareils d'éclairage installés en extérieur sont amenés à satisfaire, en fonction de leurs conditions d’utilisation, aux exigences de procédures d'essais appliquées sur table vibrante. Celles-ci ont pour but de garantir l'intégrité structurelle du luminaire lorsque, une fois sur site, il est soumis aux effets du vent. Dans le cas des appareils d'éclairage décoratifs installés sur un pont de chemin de fer de structure métallique, le vent n'étant plus la source principale de vibrations en comparaison du trafic ferroviaire, on est dès lors confronté à une absence de toute indication appropriée décrivant l'essai à mener. Par conséquent, l'objectif de cette étude est d'élaborer une spécification d'essai de durée réduite, appliquée en laboratoire sur table vibrante, et représentative de l'environnement vibratoire réel de l'appareil à certifier. Sur base des essais réalisés en laboratoire, des prescriptions de montage et d'installation sont également formulées afin de garantir des conditions d’utilisation et d’essai identiques. [less ▲]

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See detailMODELING OF A GLASS WOOL PROCESS IN VIEW OF LIFE CYCLE ASSESSMENT (L.C.A.)
Gerbinet, Saïcha ULg; Renzoni, Roberto ULg; Briard, Vincent et al

in LCA conference 2012 - Proceeding of the 2nd international conference on life cycle approaches (2012, November)

Taking into account the environmental aspects in the building sector has become unavoidable. In France, environmental and sanitary statements for building products (“Fiches de Déclarations ... [more ▼]

Taking into account the environmental aspects in the building sector has become unavoidable. In France, environmental and sanitary statements for building products (“Fiches de Déclarations Environnementales et Sanitaires” (FDE&S)) have been developed. The environmental part of the statement is based on Life Cycle Assessment. So, KnaufInsulation, glass wool producer for the French market, has started to evaluated the environmental impacts of it process in view of FDE&S realization. The process has been modeling in GaBi with industrial data. Adjustable parameters have been introduced to allow to study the environmental impacts of almost all the KnaufInsulation products. So the FDE&S can be easily done for the different products. This model is also used for eco-conception. The LCA results allow to show the life cycle leaks. More, in modifying the model, the impact of a change in the process on its environmental performances will be highlighted. So relevant improvement will be brought out. The model and the mains results as the eco-conception strategy will be presented. The interest of making a modeling based on the step and process of the life cycle of a product or a product range will be clearly understood. [less ▲]

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See detailPoint actuel sur la signification des ratios agonistes / antagonistes au membre inférieur
Croisier, Jean-Louis ULg; Delvaux, François ULg; Kaux, Jean-François ULg et al

in Abstract book des XIVèmes Rencontres isocinétiques MEDIMEX / ROTHSCHILD (2012, November)

Detailed reference viewed: 124 (12 ULg)