References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailFuzzy partition optimization for approximate fuzzy Q-iteration
Busoniu, Lucian; Ernst, Damien ULg; Babuska, Robert et al

in Proceedings of the 17th IFAC World Congress (IFAC-08) (2008)

Reinforcement learning (RL) is a widely used learning paradigm for adaptive agents. Because exact RL can only be applied to very simple problems, approximate algorithms are usually necessary in practice ... [more ▼]

Reinforcement learning (RL) is a widely used learning paradigm for adaptive agents. Because exact RL can only be applied to very simple problems, approximate algorithms are usually necessary in practice. Many algorithms for approximate RL rely on basis-function representations of the value function (or of the Q-function). Designing a good set of basis functions without any prior knowledge of the value function (or of the Q-function) can be a difficult task. In this paper, we propose instead a technique to optimize the shape of a constant number of basis functions for the approximate, fuzzy Q-iteration algorithm. In contrast to other approaches to adapt basis functions for RL, our optimization criterion measures the actual performance of the computed policies in the task, using simulation from a representative set of initial states. A complete algorithm, using cross-entropy optimization of triangular fuzzy membership functions, is given and applied to the car-on-the-hill example. [less ▲]

Detailed reference viewed: 120 (4 ULg)
Full Text
Peer Reviewed
See detailA decision problem for ultimately periodic sets in non-standard numeration systems
Charlier, Emilie ULg; Rigo, Michel ULg

in Actes des Journées Montoises d'Informatique Théorique (2008)

Consider a non-standard numeration system like the one built over the Fibonacci sequence where nonnegative integers are represented by words over {0, 1} without two consecutive 1. Given a set X of ... [more ▼]

Consider a non-standard numeration system like the one built over the Fibonacci sequence where nonnegative integers are represented by words over {0, 1} without two consecutive 1. Given a set X of integers such that the language of their greedy representations in this system is accepted by a finite automaton, we consider the problem of deciding whether or not X is a finite union of arithmetic progressions. We obtain a decision procedure under some hypothesis about the considered numeration system. In a second part, we obtain an analogous decision result for a particular class of abstract numeration systems built on an infinite regular language. [less ▲]

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailSeismic behaviour of storage racks made of thin-walled steel members
Degée, Hervé ULg; Denoël, Vincent ULg

in Proceedings of the 7th European Conference on Structural Dynamics (2008)

This paper presents an example of rack structure modelling accounting for structural non-linearities and for the possible relative motion between the rack and the stored goods that occurs as soon as the ... [more ▼]

This paper presents an example of rack structure modelling accounting for structural non-linearities and for the possible relative motion between the rack and the stored goods that occurs as soon as the inertial force exceeds the friction resistance. It evidences that the constant reduction factor proposed by the RMI should actually be modulated according to the structural typology (and in particular the first natural frequency of the system) and to the ratio ag/μ between the design acceleration and the friction coefficient of the pallets. [less ▲]

Detailed reference viewed: 117 (6 ULg)
Full Text
Peer Reviewed
See detailHolocene records of regional dust deposition using peat bogs
Le Roux, G.; De Vleeschouwer, F.; Cheburkin, A. et al

Poster (2008)

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailRecognition of homopyrimidine mismatches by distance-constrained macrocyclic bisintercalators
Bahr, Matthias; Gabelica, Valérie ULg; Granzhan, Anton et al

in Nucleic Acids Symposium Series (2008), 52

Binding of three macrocyclic bisintercalators to mismatch-containing duplexes was analyzed by thermal denaturation experiments, electrospray mass spectrometry studies (ESI-MS) and fluorescent intercalator ... [more ▼]

Binding of three macrocyclic bisintercalators to mismatch-containing duplexes was analyzed by thermal denaturation experiments, electrospray mass spectrometry studies (ESI-MS) and fluorescent intercalator displacement (FID) titrations. The macrocyclic bisintercalators bind to duplexes containing mismatched thymine bases with high selectivity over the fully matched one and affinity in the submicromolar range (Kd). The FID results also demonstrate that the macrocyclic naphthalene derivative BisNP preferentially binds to pyrimidine-pyrimidine mismatches compared to all other possible base mismatches. This ligand also efficiently competes with a DNA enzyme (M.TaqI) for binding to a duplex with a TT-mismatch [less ▲]

Detailed reference viewed: 27 (0 ULg)
Full Text
Peer Reviewed
See detailLes outsiders, ou le retour de la norme : à propos des Goncourt francophones
Provenzano, François ULg

in Discours social (2008), XXX

Detailed reference viewed: 21 (1 ULg)
Full Text
Peer Reviewed
See detailComputation of nonlinear normal modes, part II: numerical continuation in Auto
Serandour, Guillaume; Peeters, Maxime ULg; Kerschen, Gaëtan ULg et al

in Sixth EUROMECH Nonlinear Dynamics Conference, Saint Petersbourg, 2008 (2008)

The concept of nonlinear normal modes (NNMs) is discussed in the present paper and its companion, Part I. Because there is virtually no application of the NNMs to large-scale engineering structures, these ... [more ▼]

The concept of nonlinear normal modes (NNMs) is discussed in the present paper and its companion, Part I. Because there is virtually no application of the NNMs to large-scale engineering structures, these papers are an attempt to highlight one aspect that might drive their development in the future. Specifically, we support that numerical methods for the continuation of periodic solutions pave the way for an effective and practical computation of NNMs. In this context, we show that the NNMs computation is possible using an existing continuation software, namely AUTO07. This is demonstrated using a 2DOF nonlinear system. The results are compared with those obtained with the Matlab algorithm described in Part I. [less ▲]

Detailed reference viewed: 61 (10 ULg)
Full Text
See detailAnalytic properties of different unitarization schemes
Selyugin, O. V.; Cudell, Jean-René ULg; Predazzi, E.

in Eur. Phys. J. ST (2008), 162

Detailed reference viewed: 5 (1 ULg)
Full Text
Peer Reviewed
See detailModel-based diagnosis of acute pulmonary embolism - results from a porcine model
Desaive, Thomas ULg; Ghuysen, Alexandre ULg; Kolh, Philippe ULg et al

in Intensive Care Medicine (2008), 34(suppl. 1), 78

Detailed reference viewed: 23 (2 ULg)
Full Text
Peer Reviewed
See detailPrimary seed dispersal by tamarins into a secondary forest
Culot, Laurence ULg; Muñoz Lazo, Fernando J. J.; Huynen, Marie-Claude ULg et al

in Primate Eye (2008), 96

Detailed reference viewed: 26 (7 ULg)
Full Text
Peer Reviewed
See detailEvaluation de la condition physique chez le cheval d’endurance : comparaison d’un test de terrain adapté et d’un test sur tapis roulant
Fraipont, Audrey ULg; Van Erck, Emmanuelle; Toussaint, Marie et al

in 36èmes Journées AVEF (2008)

Detailed reference viewed: 147 (13 ULg)
Peer Reviewed
See detailOptimization of a drug-cyclodextrin complexation reaction by a static supercritical carbon dioxide process
Brion, Michael; Nizet, Dominique; Evrard, Brigitte ULg

Poster (2008)

Detailed reference viewed: 11 (0 ULg)
See detailLe nom de Chaudfontaine
Boutier, Marie-Guy ULg

in Pierret, Jean-Marie (Ed.) Le deux cent cinquantième anniversaire de l'opéra wallon "Li voyèdje di Tchaufontainne" (1757), avec une reproduction de l'édition faite par Jean Haust en 1924 (2008)

Présentation des grandes étapes d'une recherche toponymique sur la "configuration" toponymique Chèvremont, Chyvecourt et Chaudfontaine destinée au grand public; cf. Bouter 2004.

Detailed reference viewed: 46 (0 ULg)
Full Text
See detailA regional travel model for predicting the number of visitors in forests: application to the Walloon region
Colson, Vincent ULg; Lejeune, Philippe ULg

in Raschi, A.; Trampetti, S. (Eds.) Management for protection and sustainable development (2008)

The Walloon forests are visited by local people and tourists but the importance of forest recreation is very different from one part of the Region to another. As it was particularly difficult to obtain ... [more ▼]

The Walloon forests are visited by local people and tourists but the importance of forest recreation is very different from one part of the Region to another. As it was particularly difficult to obtain quantified information by counting, a model has been built by GIS and taking results from different surveys (telephone survey and face-to-face interviews) into account. This model makes the distinction between local visitors and one-day tourists coming from the neighbouring regions (in a buffer zone of 50 km). A decay curve based on travel time is used for predicting the number of visits throughout all Walloon forests from each departure point. An attraction function is added to the model to attribute each visit to a woodland and different scenarios have been tested to obtain a distribution of people by regions of provenance as similar as the results of surveys. At a regional level, this model is a good alternative to counting and gives a good overview of the forests for which recreation activities are more relevant and have to be taken into account in forest management plans. [less ▲]

Detailed reference viewed: 53 (4 ULg)
Full Text
Peer Reviewed
See detailA short C-rich PNA fragment capable to form novel G-quadruplex-PNA complexes
Amato, Jussara; Gabelica, Valérie ULg; Borbone, Nicola et al

in Nucleic Acids Symposium Series (2008), 52

In this work we investigated the interaction between the short ac(4)a C-rich peptide nucleic acid (PNA) probe and two intramolecular G-quadruplex targets having the same G-tetrad core, but different ... [more ▼]

In this work we investigated the interaction between the short ac(4)a C-rich peptide nucleic acid (PNA) probe and two intramolecular G-quadruplex targets having the same G-tetrad core, but different folding topologies. The T(G(4)T)(3)G(4)T and the recently reported tetra-end-linked-(TG(4)T)(4) G-rich oligonucleotides (GROs) were chosen and synthesized for this study. UV, CD, and MS experiments revealed the formation of novel 1:1 G-quadruplex-PNA complexes besides the expected DNA-PNA heteroduplexes [less ▲]

Detailed reference viewed: 58 (7 ULg)
See detailLa consécration de la Charte des droits fondamentaux
Defossez, Alexandre ULg

Conference (2008)

Detailed reference viewed: 46 (5 ULg)
Full Text
See detailGround-based CO observations at the Jungfraujoch: Comparison between FTIR and NDIR measurements
Dils, Bart; Mahieu, Emmanuel ULg; Demoulin, Philippe ULg et al

in Geophysical Research Abstracts (2008), 10

Measurements of CO have been performed at the Swiss Alpine Jungfraujoch station (46.5º N, 8.0° E, 3580m a.s.l.) on a regular basis since the mid-1980’s, using Fourier Transform Infrared solar absorption ... [more ▼]

Measurements of CO have been performed at the Swiss Alpine Jungfraujoch station (46.5º N, 8.0° E, 3580m a.s.l.) on a regular basis since the mid-1980’s, using Fourier Transform Infrared solar absorption spectrometry (FTIR), and since 1996 using an in situ Nondispersive Infrared technique (NDIR). While the in situ measurements detect local CO concentrations at the site, the FTIR technique provides integrated measurements along the line-of-sight. Nevertheless, the pressure broadening of the spectral absorption lines recorded at high resolution enables retrieving information on the vertical distribution of CO, mainly in the troposphere, including its concentration near the surface. Considering the inherent capabilities of the two independent measurement techniques, substantial differences between both data sets for surface level CO could potentially arise. Here we present a comparison of both data sets for the 1997 -2004 time period. Both data sets have been analysed by using successive Kolmogorov-Zurbenko filters. It appears that the long-term trend over the given time period is significantly different for both datasets. Possible causes for this difference will be critically discussed. [less ▲]

Detailed reference viewed: 60 (1 ULg)
Full Text
Peer Reviewed
See detailReproduction Performances and Risk Factors in dairy and beef cattle in Belgium.
Hanzen, Christian ULg; Theron, Léonard ULg; Sterkendries, José et al

in Proceedings of the XXVth World Buiatric Congress. (2008)

Detailed reference viewed: 32 (9 ULg)
Peer Reviewed
See detailThermo-hydro-mechanical simulation of Atlas in situ large-scale test in Boom clay
François, Bertrand ULg; Laloui, Lyesse

Conference (2008)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailNumerical Simulation of a Scroll Expander for Use in a Rankine Cycle
Lemort, Vincent ULg; Quoilin, Sylvain ULg; Lebrun, Jean ULg

(2008)

This paper presents two simulation models of scroll expanders for use in heat recovery Rankine cycle applications: a detailed reference model and a simplified model. The reference model associates a ... [more ▼]

This paper presents two simulation models of scroll expanders for use in heat recovery Rankine cycle applications: a detailed reference model and a simplified model. The reference model associates a detailed geometrical description of the expander to a thermodynamic modeling of the expansion process in the machine. Due to large computational effort, the reference model is not appropriate for simulation of the entire Rankine cycle system. The paper shows how a simplified model can be built from the reference model. This model involves a limited number of parameters, which describe the main features of the machine. An experimental study is carried out on a prototype of Rankine cycle working with HCFC-123. Based on detailed measurements, the validation of both models is conducted. It is found that both models are able to predict the mass flow rate, the delivered shaft power and the discharge temperature with a good accuracy. [less ▲]

Detailed reference viewed: 837 (41 ULg)
Full Text
Peer Reviewed
See detailLes pouvoirs locaux et le droit dérivé des marchés publics
Durviaux, Ann-Lawrence ULg

in Les pouvoirs locaux et le droit communautaire (2008)

Detailed reference viewed: 52 (9 ULg)
Full Text
Peer Reviewed
See detail3D fully coupled multiphase modelling of Ekofisk reservoir
Ringlet, Clémence; Charlier, Robert ULg; Schroeder, Christian ULg et al

in Shao, Jian-Fu; Burlion, Nicolas (Eds.) Thermo-hydromechanical and chemical Coupling in Geomaterials and Applications (2008)

During reservoir production, the depletion usually induces a compaction of the reservoir layers. To enhance oil recovery, waterflooding operations are generally performed but, in the North Sea chalk ... [more ▼]

During reservoir production, the depletion usually induces a compaction of the reservoir layers. To enhance oil recovery, waterflooding operations are generally performed but, in the North Sea chalk reservoir, they have also induced an additional compaction. This latter phenomenon has a positive impact (improve the ‘Compaction drive’ oil recovery) but endangers the offshore platforms and causes huge extra costs. The coupling effects between mechanical behaviour and fluids flow are thus a key issue in petroleum engineering. Pasachalk program I & II have proposed a constitutive model (referred as Pasachalk model), where the suction is the key parameter to explain the water weakening effect. This model has been used for the modelling of waterflooding experiment on chalk plug and bi-dimensional reservoir. However, as the reservoir modelling is actually a 3D model, the purpose of this paper is to present 3D fully coupled modelling of a simplified Ekofisk reservoir during production and waterflooding phases. In order to exhibit the influence of the constitutive mechanical model, different studies are performed: increasing the complexity of the mechanical model (from an elastic model up to the Pasachalk one with suction effect). The numerical results show the influence of the mechanical law on the oil production and exhibit that only an elasto-plastic law with suction effects succeeds to reproduce compactions during both production and waterflooding. [less ▲]

Detailed reference viewed: 218 (27 ULg)
Full Text
Peer Reviewed
See detailEvaluation of medicinal plants from Reunion Island for antimalarial and cytotoxic activities
Jonville, Marie ULg; Kodja, H.; Humeau, L. et al

in Planta Medica (2008), 74(9), 1002-1002

Detailed reference viewed: 50 (16 ULg)
Full Text
See detailExploration of nonlinear shunting strategies as effective vibration absorbers
Viguié, Régis ULg; Peeters, Maxime ULg; Kerschen, Gaëtan ULg et al

in 45th Technical Meeting of the Society of Engineering Science, Urbana Champaign, 2008 (2008)

Detailed reference viewed: 40 (7 ULg)
Full Text
See detailPlant species extinction debt in a biodiversity hotspot: community and species approaches
Piqueray, Julien ULg; Bisteau, Emmanuelle ULg; Cristofoli, Sara ULg et al

in Belgian Journal of Botany (2008), 141(2), 189

Destruction and fragmentation of natural and semi-natural habitats are considered as major threats for plant species richness. However, the response of plant species richness to habitat alteration is ... [more ▼]

Destruction and fragmentation of natural and semi-natural habitats are considered as major threats for plant species richness. However, the response of plant species richness to habitat alteration is sometimes delayed. This delay induces an extinction debt in plant communities that are thus prone to undergo species extinctions in the following years. Several methodologies were proposed to detect this extinction debt and estimate the mean number of species yet to disappear. In this study, we developed a new methodology for the estimation of the extinction debt extent. Moreover, we proposed a species approach aimed at determining which species are more sensitive to extinction as a consequence of habitat destruction and fragmentation. Finally, we explored the colonization ability of habitat specialist species. This aspect is of fi rst importance to counteract local species extinctions. Our model habitat is calcareous grasslands of Southeast Belgium that have suffered an important fragmentation process since the beginning of the twentieth century. We estimated that the mean extinction debt of the calcareous grassland patches was ca. 24 species, including ca. six specialist species. We showed that 16 of the 46 specialist species did not meet their area requirement anymore and were therefore considered as sensitive to extinction. However, the species composition of the more recent grasslands indicates a non-negligible recolonization potential of specialist species. There is thus a real possibility to reduce extinction risk by restoring suitable habitats. [less ▲]

Detailed reference viewed: 57 (20 ULg)
Peer Reviewed
See detailLa contre-performance du cheval de CSO – une cause médicale
Van Erck, E.; Lekeux, Pierre ULg

in 36èmes Journées AVEF (2008)

Detailed reference viewed: 41 (3 ULg)
Full Text
Peer Reviewed
See detailTemps des bailleurs, temps de la gestion communautaire ? Genèse difficile d’une Zone d’Intérêt Cynégétique à Gestion Communautaire dans l’Est Cameroun
Vermeulen, Cédric ULg; Julve Larrubia, C.

in CIRAD (Ed.) Actes de l'Atelier d’échange d’expériences panafricaines sur les approches communautaires de conservation des ressources naturelles, la Tapoa (Niger) Mars 2008 (2008)

De 2002 à 2004 le projet UE « Réseau de partenariat » a étudié la faisabilité de la mise en place d’une Zone d’Intérêt Cynégétique à gestion communautaire (ZICGC) superposée à l’Unité Forestière ... [more ▼]

De 2002 à 2004 le projet UE « Réseau de partenariat » a étudié la faisabilité de la mise en place d’une Zone d’Intérêt Cynégétique à gestion communautaire (ZICGC) superposée à l’Unité Forestière d’Aménagement 10039 au Cameroun, puis a entamé les premières étapes d’information/sensibilisation auprès des communautés locales. Les premières études techniques, relatives au suivi de la pression de chasse ont également été lancées. Techniquement séduisante et novatrice dans son principe, cette initiative a avorté faute de temps, le projet UE financé sur trois années n’ayant pas été prolongé. A l’examen, le manque de pertinence temporelle de cette action est flagrant, la mise en place d’une ZICGC requérant au strict minimum cinq années complètes. Il s’avère que, outre la complexité sociale et technique du concept, ce sont les contraintes de l’appel d’offre UE (niveau de cofinancement notamment) qui ont, dès le départ, conditionné des temps courts dans l’exécution du projet. Ces temps ont ensuite été encore amputés par la mise en place lente des équipes et du matériel sur le terrain, en raison notamment des procédures d’appel d’offre. Il semble donc que les contraintes mises en place par le bailleur de fonds à l’origine pourraient grever l’efficacité immédiate du projet et participent en partie à l’échec de certaines initiatives à fondement social. [less ▲]

Detailed reference viewed: 83 (15 ULg)
Full Text
Peer Reviewed
See detailPredicting gene essentiality from expression patterns in Escherichia coli
Irrthum, Alexandre ULg; Wehenkel, Louis ULg

(2008)

Essential genes are genes whose loss of function causes lethal- ity. In the case of pathogen organisms, the identification of these genes is of considerable interest, as they provide targets for the ... [more ▼]

Essential genes are genes whose loss of function causes lethal- ity. In the case of pathogen organisms, the identification of these genes is of considerable interest, as they provide targets for the development of novel antibiotics. Computational analyses have revealed that the posi- tions of the encoded proteins in the protein-protein interaction network can help predict essentiality, but this type of data is not always avail- able. In this work, we investigate prediction of gene essentiality from expression data only, using a genome-wide compendium of expression patterns in the bacterium Escherichia coli, by using single decision trees and random forests. We first show that, based on the original expression measurements, it is possible to identify essential genes with good accu- racy. Next, we derive, for each gene, higher level features such as average, standard deviation and entropy of its expression pattern, as well as fea- tures related to the correlation of expression patterns between genes. We find that essentiality may actually be predicted based only on the two most relevant ones among these latter.We discuss the biological meaning of these observations. [less ▲]

Detailed reference viewed: 25 (0 ULg)
Full Text
Peer Reviewed
See detailEtude de l'écologie des communautés macrophytiques en vue de fournir des indicateurs paléo-environnementaux pour les lacs-cratères d'Afrique de l'Est
Lebrun, Julie ULg; Mahy, Grégory ULg

in Anne Bonis (Ed.) Actualité de la recherche en écologie des communautés végétales. Actes du quatrième Colloque ECOVEG: Rennes, 12-14 mars 2008 (2008)

This research is part of an integrated paleoecological project which aims at coupling reconstructions of past vegetation and water-quality changes with climate variability. Crater-lakes from East Africa ... [more ▼]

This research is part of an integrated paleoecological project which aims at coupling reconstructions of past vegetation and water-quality changes with climate variability. Crater-lakes from East Africa are favourable to the conservation of proxy indicators such as plant macrofossils used to reconstruct the lake ecosystem. The study of modern macrophytic communities in relationship with present environmental parameters was the first step of this research. Eventually, it will allow us to select species with high proxy-indicator value. Phytosociologic and environmental data were collected in 18 crater-lakes in South-western Uganda. In each relevé, species abundance and habitat conditions were described. Environmental parameters were used to develop a lake typology. A cluster analysis identified 6 aquatic and semi-aquatic communities and the indicator species were highlighted. The CA ordination emphasized the importance of geography, physico-chemistry and trophic level in the community structure. Temperature, pH, sediment type, depth and slope were the most correlated parameters to floristic variation in the CCA ordination. These preliminary results give some trends about the ecology of macrophytes communities. A complete dataset and the study of species ecological range will allow us to go further in the ecological significations of macrofossils. [less ▲]

Detailed reference viewed: 98 (5 ULg)
Full Text
Peer Reviewed
See detailComparison between a commercial kibble and hatchling chickens as diets for adult ferrets (Mustela putorius furo) : effects on digestibility coefficients and blood parameters
Piazza, Stéphanie; Robaye, Vincent ULg; Lhoest, Estelle et al

in Iben, C. (Ed.) Proceedings of the 12th ESVCN Congress (2008)

Detailed reference viewed: 62 (4 ULg)
Full Text
Peer Reviewed
See detailThe spin-flip amplitude in the impact-parameter representation
Selyugin, O. V.; Cudell, Jean-René ULg

in European Physical Journal. Special Topics (2008)

The impact-parameter representation of the spin-flip amplitude of hadron elastic scattering is examined in different unitarisation schemes, taking the Born term of the spin-flip amplitude from the Dubna ... [more ▼]

The impact-parameter representation of the spin-flip amplitude of hadron elastic scattering is examined in different unitarisation schemes, taking the Born term of the spin-flip amplitude from the Dubna Dynamical Model (DDM). It is shown that the basic properties of the unitarisation schemes are independent of the functional form used for unitarisation but heavily depend on the asymptotic value of the unitarised amplitude. [less ▲]

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailWind quantification in urban environments
Reiter, Sigrid ULg

in Kenny, Paul; Brophy, Vivienne; Lewis, J.Owen (Eds.) Towards Zero Energy Buildings, Proceedings of the 25th Conference on Passive and Low Energy Architecture (2008)

There is today a real lack of scientific studies and simple design tools to understand wind flows around buildings. This research is based on a great number of CFD (computational fluid dynamics ... [more ▼]

There is today a real lack of scientific studies and simple design tools to understand wind flows around buildings. This research is based on a great number of CFD (computational fluid dynamics) simulations carried out with FLUENT software to evaluate wind comfort at pedestrian level. This paper describes first the wind comfort criteria chosen. It then develops the process used for validating FLUENT software for wind studies in dense urban environments by comparing our simulations results with wind tunnel tests. This validation shows that wind mean velocities around buildings can be simulated numerically with a very high degree of accuracy. Based on the results of our simulations, we developed simple graphical tools to quantify critical wind speeds around buildings. This article should thus help in practice architects and town planners to design our built environment. Moreover, this paper shows how numerical modelling is now a high-performance tool to work out useful guidelines and simple design tools for urban planners. [less ▲]

Detailed reference viewed: 99 (16 ULg)
Full Text
Peer Reviewed
See detailModel of Irrigation Development for Floodplain of the Tonle Sap Great Lake
someth, Paradis; Kubo, n; Ly, Sarann ULg et al

Poster (2008)

Rice is a staple crop in Cambodia. To meet the large requirement of rice consumption due to rapid increased population and to boost the economy, the rice production in this country needs to be enhanced ... [more ▼]

Rice is a staple crop in Cambodia. To meet the large requirement of rice consumption due to rapid increased population and to boost the economy, the rice production in this country needs to be enhanced. The Tonle Sap Great Lake of Cambodia has huge floodplain suitable for large amount for rice production and potential water resources for rice-based farming system. Due to large variation of water level of the lake, some areas around the lake are flooded in wet season and shortage of water in dry season. Studies to exploit the flood and the water rsources of the lake and its tributaries have not been well conducted yet. The West Baray and Batheay irrigation systems are located in the floodplain of the Tonle Sap Great Lake and the Mekong River. In this research, the irrigation systems are studied as model sites for future development of the floodplain of the Tonle Sap Great Lake. [less ▲]

Detailed reference viewed: 259 (1 ULg)
Peer Reviewed
See detailWATER QUALITY AND POLLUTION CONTROL IN PHNOM PENH, CAMBODIA
men, nareth; Ly, Sarann ULg; ann, vannak et al

Conference (2008)

The urban infrastructure, particularly water supply and drainage systems, have deteriorated severely in the past two decades in Phnom Penh, the capital city and the economic center of Cambodia. Water ... [more ▼]

The urban infrastructure, particularly water supply and drainage systems, have deteriorated severely in the past two decades in Phnom Penh, the capital city and the economic center of Cambodia. Water pollution caused by untreated wastewater is one of the serious problems that confront most developing countries (Kwai et al.1991). In Phnom Penh City, all kinds of wastewater are discharged to rivers, lakes and wetlands throughout the city without proper treatment causing serious surface water pollution. Water testing is an essential factor to control water pollution. However, water quality data and water quality testing systems are still poorly developed in Cambodia due to lack of facilities and technical expertise. Therefore, there is no information available on sewage water quality in Phnom Penh City. That’s why the work is aimed at collating basic information about the situation of water supply, waste water system and solid waste. The present information will provide the basis for targeting further field research. This is included the overview of sources and activities that may lead to pollution, with an appreciation of type of water pollutants involved, their magnitude and movement. Types of waste and effluent disposal including sanitation, liquid and solid waste management systems are described. After reviewing all the available, we found that the distribution of water has been well organized by the Phnom Penh Water Supply Authority while the managements of the wastewater, storm water and solid waste are poor due to the rapid urbanisation and industrialisation. [less ▲]

Detailed reference viewed: 1597 (2 ULg)
Peer Reviewed
See detailInfluence of environmental conditions on the interfacial organisation of fengycin, a bioactive lipopeptide produced by Bacillus subtilis
Eeman, Marc; Pegado, Luis; Dufrêne, Yves et al

Poster (2008)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailDevelopment of Procedural Learning in Children : The “Toy Task”
Lejeune, Caroline ULg; Meulemans, Thierry ULg

Poster (2008)

The authors generally agree that procedural learning abilities play an important role in the child development and that they are present early in childhood. However, few studies have been carried out in ... [more ▼]

The authors generally agree that procedural learning abilities play an important role in the child development and that they are present early in childhood. However, few studies have been carried out in this area because of the difficulty to develop tests specifically designed for the evaluation of these capacities in young children. In this study, we presented a new task aimed to evaluate visuo-motor skill learning in the young child. The purpose of the present study was to explore whether procedural learning abilities are present in the same extent in 4-year as 7- and 10-year-old children. Our sample is composed of 60 children divided into 3 age-groups. The task is composed of 5 blocks of 12 trials during which each subject has to use a reversed mouse of a computer in order to “catch” different toys appearing on the screen; 2 blocks of 12 trials was administered after a 15 minutes delay. Our results show an important difference between the groups for the first block; on the other hand, for the next blocks, the results show an absence of age-related difference between participants in our perceptive-motor skill learning task, confirming the idea according to which procedural learning abilities are efficient early in development (the difference observed during the first block being probably due to the intervention of executive mechanisms). [less ▲]

Detailed reference viewed: 31 (3 ULg)
Peer Reviewed
See detailHafting Traces on Flint Tools
Rots, Veerle ULg

in Longo, Laura; Della Riva, Martina (Eds.) Proceedings of the Congress "Prehistoric Technology: 40 years later. Functional Studies and the Russian Legacy" (2008)

Detailed reference viewed: 20 (1 ULg)
Peer Reviewed
See detailThe contribution of ethnoarchaeological macro- and microscopic wear traces to the understanding of archaeological hide-working processes
Beyries, Sylvie; Rots, Veerle ULg

in Longo, Laura; Della Riva, Martina (Eds.) Proceedings of the Congress "Prehistoric Technology: 40 years later. Functional Studies and the Russian Legacy" (2008)

Detailed reference viewed: 48 (2 ULg)
Full Text
Peer Reviewed
See detailLes hyperconflits en organisation
Faulx, Daniel ULg; Delvaux, Sophie

in Actes du 15ème Congrès de Psychologie du Travail et des Organisation de Langue Française. CD-rom. Québec.. (2008)

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de ... [more ▼]

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de huit focus groups composés de professionnels du traitement des conflits, nous dégageons 24 indicateurs des hyperconflits. Plus généralement, il ressort de notre étude que ces situations sont liées à une réduction de la complexité du système organisationnel couplée à une généralisation de la dynamique conflictuelle du point de vue de l’espace-temps, des processus et des conséquences. Les implications en termes d’interventions sont également discutées. [less ▲]

Detailed reference viewed: 124 (8 ULg)
Peer Reviewed
See detailSports injury surveillance in young athletes in Luxembourg
Frisch, Anne ULg; Windal, T.; Croisier, Jean-Louis ULg et al

in Isokinetics & Exercise Science (2008), 16(3), 188

Detailed reference viewed: 50 (6 ULg)
Full Text
See detailThe practical challenges of the Biosafety officer : interacting with the user
Grignet, Christine ULg

in The Biosafety Professional: roles and interactions in a complex network (2008)

Detailed reference viewed: 37 (11 ULg)
Full Text
Peer Reviewed
See detailGait analysis during an original walking test
Croisier, Jean-Louis ULg; Crielaard, Jean-Michel ULg; Chapelier, Dominique et al

in Parkinsonism & Related Disorders (2008), 14

Detailed reference viewed: 85 (13 ULg)
Full Text
Peer Reviewed
See detailClinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe.
Monty, Arnaud ULg; Mahy, Grégory ULg

Poster (2008)

Plant population differentiation may play a role in decreasing the ability to predict whether, where, and when an introduced species will invade. However, few studies have addressed the level of genetic ... [more ▼]

Plant population differentiation may play a role in decreasing the ability to predict whether, where, and when an introduced species will invade. However, few studies have addressed the level of genetic change an alien species may undergo during range expansion, e.g. in response to climatic variation with altitude. In the present study, we tested the hypothesis that invasive populations of Senecio inaequidens (Asteraceae) differentiated during migration from two independent introduction sites into divergent altitudinal and climatic zones. We carried out two years of common garden experiments with eight populations from a Belgian altitudinal transect and ten populations from similar French transect. Climatic analysis revealed that the Belgian transect followed a temperature and precipitation gradient. A temperature and summer drought gradient characterized the French study site. We evaluated differentiation and clinal variation in the following characters: days to germination, days to flowering, height at maturity, final plant height and aboveground biomass. Results showed that S. inaequidens populations differentiated in growth traits during invasion. First year of experiment, regressing population growth trait means against source population altitude indicated the presence of clinal variation along both transects. Second year, similar results were found along the French transect, i.e. a reduction in height at maturity, plant height and aboveground biomass with increasing altitude. Including seed mass as a covariate did not change the outcome of the analysis. The possible evolutionary causes for the differentiation observed are discussed. [less ▲]

Detailed reference viewed: 24 (6 ULg)
Peer Reviewed
See detailA model-based relevance estimation approach for feature selection in microarray datasets
Bontempi, Gianluca; Meyer, Patrick ULg

in Artificial Neural Networks-ICANN 2008 (2008)

Detailed reference viewed: 15 (4 ULg)
Full Text
Peer Reviewed
See detailIntegrated assessment of flood protection measures in the context of climate change: hydraulic modelling and economic approach
Dewals, Benjamin ULg; Giron, Eve; Ernst, Julien ULg et al

in Aravossis, K.; Brebbia, C. A.; Gomez, Nieves (Eds.) Environmental Economics (2008)

Detailed reference viewed: 64 (37 ULg)
Full Text
See detailL’Imaginaire des Pays-Bas au XIXe siècle. Regards croisés français et allemands
Andringa, Kim ULg

in L'Idée et le texte (2008)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailAdvantages and limits of a video multitracking system for quantification of individual behavior in a large fish shoal
Delcourt, Johann ULg; Becco, Christophe ULg; Vandewalle, Nicolas ULg et al

in Spink, A.; Ballintijn, M. R.; Bogers, N. D. (Eds.) et al Proceedings of Measuring Behavior 2008 (2008)

Detailed reference viewed: 84 (26 ULg)
Full Text
Peer Reviewed
See detailAnti-inflammatory properties of stigmasterol in cartilage: new insights
Gabay, Odile; Sanchez, Christelle ULg; Chevy, F. et al

in Osteoarthritis and Cartilage (2008), 16(Suppl 4), 79

Detailed reference viewed: 119 (3 ULg)
Full Text
Peer Reviewed
See detailFinite element modelling of thermo-elasto-plastic water saturated porous materials
Luison, Loris; François, Bertrand ULg; Bortolotto, Roberto et al

Poster (2008)

Detailed reference viewed: 21 (2 ULg)
Peer Reviewed
See detailClinical and functional responses to inhaled albuterol, ipratropium bromide and combination of both in ascaris suum-sensitized cats with allergen-induced bronchospasm
Leemans, Jérôme ULg; Kirschvink, N.; Cambier, Carole ULg et al

in Proceedings: 26th Annual Symposium of the Veterinary and Comparative Respiratory Society (2008)

Detailed reference viewed: 31 (3 ULg)
Full Text
Peer Reviewed
See detailDemandes et ressources de travail, stress, engagement et intention de quitter : comparaison entre les travailleurs âgés et les jeunes travailleurs
Bertrand, Françoise ULg; Dardenne, Benoît ULg; Hansez, Isabelle ULg

in Pettersen, N.; Boudrias, J. S.; Savoie, A. (Eds.) Entre tradition et innovation, comment transformons-nous l'univers de travail? Actes du 15ème congrès de Psychologie du Travail et des Organisations de Langue Française (2008)

En Belgique, le taux d’emploi des travailleurs âgés est un des plus faibles de toute l’Europe. Cela constitue un problème tant au niveau économique que social (Griffiths, 1997 ; Kilbom, 1999). Cette ... [more ▼]

En Belgique, le taux d’emploi des travailleurs âgés est un des plus faibles de toute l’Europe. Cela constitue un problème tant au niveau économique que social (Griffiths, 1997 ; Kilbom, 1999). Cette nouvelle problématique est le point de départ de recherches visant à identifier ce qui pousse les travailleurs à quitter précocement le lieu de travail. Se basant sur le modèle ‘Job Demands Resources (JDR) Model’ (e.g. Demerouti, Bakker, Nachreiner & Schaufeli, 2001; Schaufeli & Bakker, 2004), une étude a été conduite afin d’identifier les raisons de départ (Griffeth, Hom & Gaertner, 2000). Il s’agit également d’étudier le rôle du stress et de l’engagement dans l’explication de ces retraits précoces. Le but est de comparer un modèle d’explication du turnover pour trois classes d’âges ; les jeunes travailleurs, les travailleurs d’âge moyen et les travailleurs âgés. Un questionnaire a été développé afin d’identifier les raisons de départ des travailleurs. Quatre facteurs de départ sont considérés dans cette dimension trans-générationnelle. Deux d’entre eux concernent les ressources de travail, soit le manque de ressources, le manque de développement personnel, et les deux autres concernent les demandes du travail, soit la pression et les changements organisationnels. Une mesure du stress, de l’engagement et de l’intention de quitter a aussi été inclue. Au total, 11 entreprises belges ont participé à cette enquête, ce qui correspond à 1772 questionnaires. Les résultats montrent que le manque de développement personnel et les changements expliquent directement l’intention de quitter pour les jeunes et les travailleurs d’âge moyen. Par contre, le manque de ressources explique directement l’intention de quitter pour les travailleurs âgés. Le stress et l’engagement jouent un rôle important dans l’explication de l’intention de quitter pour les trois groupes d’âges. La pression et le manque de ressources expliquent le stress. Le manque de ressources, le manque de développement personnel et la pression ont un impact sur l’engagement. Les changements organisationnels n’expliquent pas le stress. Pour les travailleurs âgés, le manque de ressources n’affecte pas l’engagement. En conclusion, le manque de développement personnel et les changements organisationnels ont plus d’impact au début de la carrière et le manque de ressources est un problème qui concerne davantage les travailleurs âgés. L’état psychologique et l’évaluation des conditions de travail sont très importants pour toutes les classes d’âge dans la décision du retrait. [less ▲]

Detailed reference viewed: 533 (21 ULg)
Full Text
Peer Reviewed
See detailDetailed 2D flow simulations as an onset for evaluating socio-economic impacts of floods
Dewals, Benjamin ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

in Proceedings of the European Conference on Flood Risk Management - FloodRisk 2008 (2008)

A 2D hydraulic numerical model is presented. It is based on the fully dynamic shallow-water equations, solved by means of a finite volume scheme on multiblock structured grids. The model handles highly ... [more ▼]

A 2D hydraulic numerical model is presented. It is based on the fully dynamic shallow-water equations, solved by means of a finite volume scheme on multiblock structured grids. The model handles highly accurate DSM derived from airborne laser altimetry for the floodplains and sonar detection for the bathymetry of the main channel. The flow simulations are performed with a typical grid spacing of 2m, comparable to the resolution of the DSM and fine enough to represent reliably the flows at the scale of each building. Consequently, the model succeeds in predicting accurately the pattern of flood depth even in densely urbanized floodplains, as confirmed by several validation examples, which also demonstrate the ability of the model to reproduce depth measurements for a wide range of flood discharges without the need for recalibration of the roughness coefficient. Finally, the hydraulic model is exploited as a component of a complete flood risk modelling chain, accounting for socio-economic and ecological impacts of floods and dedicated to the assessment of flood protection measures in the context of climate change. [less ▲]

Detailed reference viewed: 55 (10 ULg)
Full Text
Peer Reviewed
See detailDetailed flood extension forecasting in the Walloon region with a 2D finite volume multiblock free surface flow solver
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Detrembleur, Sylvain ULg et al

in Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

Detailed reference viewed: 32 (8 ULg)
See detailAperture imaging beyond the classical resolution limit by using incoherent photons
Thiel, C.; Bastin, Thierry ULg; von Zanthier et al

Conference (2008)

Detailed reference viewed: 5 (0 ULg)
Full Text
See detailIl sacro approssimato: la fotografia artistica e devozionale
Dondero, Maria Giulia ULg

in Marrone, Gianfranco; Dusi, Nicola (Eds.) Destini del sacro. Discorso religioso e semiotica della cultura (2008)

Cet article porte sur les pratiques de la photographie qui ont visé à capturer et représenter l’invisible sur la plaque photographique. Il prend en considération la photographie médicale de Charcot, la ... [more ▼]

Cet article porte sur les pratiques de la photographie qui ont visé à capturer et représenter l’invisible sur la plaque photographique. Il prend en considération la photographie médicale de Charcot, la photographie spirite, la photographie des fluides, la photographie en tant qu’ex-voto, la photographie-relique et enfin la photographie dévotionnelle. Cette dernière est mise en relation avec la tradition iconographique et interprétative des images pieuses et des icones byzantines. Il s’est agi en ce dernier cas de prendre en compte la relation entre indicialité et attestation d’un au-delà tout en considérant les pratiques dévotionnelles comme des pratiques itératives d’accessibilité à une dimension sacrée de l’existence humaine. L’analyse a été consacrée à l’étude des configurations textuelles des photos ainsi qu’à leurs pratiques de réception. [less ▲]

Detailed reference viewed: 31 (1 ULg)
Full Text
See detailDosage des pepsinogènes bovins A et C par RIA
Terroni, D.; Melo de Sousa, Noelita ULg; Michiels, J. A. et al

Poster (2008)

Detailed reference viewed: 13 (3 ULg)
Full Text
Peer Reviewed
See detailInvestigation of the geomechanical aspects of a large landslide by means of a finite-element method: a case study
François, Bertrand ULg; Bonnard, Christophe; Laloui, Lyesse

in 12th IACMAG Conference (2008)

Using advanced geomechanical finite element modelling, it has been possible to simulate the mechanical behaviour of a large slope movement, namely the Triesenberg landslide. This slope is located along ... [more ▼]

Using advanced geomechanical finite element modelling, it has been possible to simulate the mechanical behaviour of a large slope movement, namely the Triesenberg landslide. This slope is located along the Rhine valley in the Principality of Liechtenstein, covering an area of around 5 km2 which includes two villages. Pore water pressure fields calculated by a separated hydrogeological model were used as an input for the geomechanical model. The results obtained through 2- and 3-dimension numerical simulations agree fairly well with field measurements of peak velocity, spatial and temporal distribution of velocity and total displacements. Such results were obtained using a Modified Cam-Clay elasto-plastic constitutive model. In addition, a parametric study has been carried out to evaluate the effect of the selected friction angle and of the range of water pressure variation on the movements during a crisis period. [less ▲]

Detailed reference viewed: 38 (4 ULg)
Full Text
Peer Reviewed
See detailIn vitro evaluation of antiplasmodial activity of plant samples used in traditional medicine in Benin
Ganfon, H.; Gbaguidi, F.; Frederich, Michel ULg et al

in Planta Medica (2008), 74(9), 1140-1140

Detailed reference viewed: 15 (1 ULg)
Full Text
See detailSynthèse de nouveaux surfactants dérivés des acides D-glucuronique et D-galacturonique.
Laurent, Pascal ULg; Richel, Aurore ULg; Richard, Gaetan ULg et al

Poster (2008)

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source ... [more ▼]

A l'heure actuelle, le bioraffinage se présente de plus en plus comme une alternative prometteuse aux filières pétrochimiques puisqu'il vise à la fois le remplacement d'une partie du pétrole comme source d'énergie et le développement de produits chimiques issus de la biomasse (végétale principalement) tels que détergents, produits phytopharmaceutiques, dissolvants, matières plastiques, etc. La valorisation de carbohydrates provenant de matières premières renouvelables [1] fait ainsi actuellement l'objet de nombreuses recherches. Dans ce cadre, la synthèse de nouveaux tensioactifs non ioniques dérivés des acides Dglucuronique et D-galacturonique a été effectuée de manière chimique et/ou enzymatique. [less ▲]

Detailed reference viewed: 76 (11 ULg)
Full Text
Peer Reviewed
See detailThe economic, social and ecologic impact of the tourism in the Vatra Dornei area
Petrescu, Iustinian; Burny, Philippe ULg

in Bran, Florina; Radulescu, Carmen Valentina; Ioan, Ildiko (Eds.) et al International Conference "Ecological Performance in a Competitive Economy", Bucharest 20-21 November 2008 : proceedings, volume II (2008)

The tourism can hold a decisional role in the development of an area that does not have access to remarkable economic resources and has the capacity to contribute decisively to the exploitation of ... [more ▼]

The tourism can hold a decisional role in the development of an area that does not have access to remarkable economic resources and has the capacity to contribute decisively to the exploitation of specific natural and antropic resources (mineral water, sediment, proper areals for sport or recreative activities, etc.) wich atract the touristic fluxes and lead to the apparition and development of the locality as a trousitic resort. In this context, the work aims to highlight the contribution and impact of the touristic activities to the socio-économic development of the Vatrea Dornei area [less ▲]

Detailed reference viewed: 54 (0 ULg)
Peer Reviewed
See detailProbable microfossils in 3.2 Ga-old shallow-water siliciclastic deposits
Javaux, Emmanuelle ULg; Marshall, Craig; Bekker, Andrey

Conference (2008)

Detailed reference viewed: 5 (0 ULg)
Full Text
See detailAnalyse des lipides polaires de la MFGM par SPE et HPLC-ELSD
Bodson, P.; Danthine, Sabine ULg; Blecker, Christophe ULg et al

Poster (2008)

Detailed reference viewed: 22 (6 ULg)
Peer Reviewed
See detailGmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities
Geuzaine, Christophe ULg; Remacle, J.-F.

in Proceedings of the 9th International Workshop on Finite Elements for Microwave Engineering (2008)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailImprovements of image processing for wheat ear counting
Cointault, Frédéric; Journaux, Ludovic; Miteran, Joel et al

in Agricultural and biosystems engineering for a sustainable world (2008)

One of the most important activity of agricultural research insititutes concerns the agronomical experiments done under different conditions needing many land observations and valuations to quantify ... [more ▼]

One of the most important activity of agricultural research insititutes concerns the agronomical experiments done under different conditions needing many land observations and valuations to quantify several variables. These observations, although generally accurate, are visually done by the agriculturist technicians and present numerous drawbacks: penibility, weak productivity, numerous labor force, limited sampling … Two feasibility studies lead in our laboratory recently have shown that some of the previous observations, and particularly the counting of the number of wheat ear per m², can be done by color and/or texture image processing for images taken directly in the field with a specific acquisition system. This paper describes the improvements of the previous studies concerning the image acquisition system, and especially the illumination control, and the justification of different hypothesis on the number of classes to detect in an image. The use of a cluster validity index has allowed to prove that 3 classes to determine all the objects in a wheat ear image are not sufficient. A correlation with a study based on the size of the analysis window is currently under investigation to improve the ear detection, which is now of 6%, compared to manual counting done by agriculturist technicians. [less ▲]

Detailed reference viewed: 69 (4 ULg)
Peer Reviewed
See detailIn Anticipation of the Loop : Stein’s Four Saints
Delville, Michel ULg

Conference (2007, December 21)

Detailed reference viewed: 22 (0 ULg)
Peer Reviewed
See detailLes applications de la logique modale dans l’étude des modalités linguistiques
Polis, Stéphane ULg

Conference (2007, December 20)

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailUsing survey data to resolve the exchange risk exposure puzzle
Muller, Aline ULg; Jongen, Ron; Verschoor, Willem

Conference (2007, December 20)

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailLes temporalités véridictoires dans la photo de sport
Dondero, Maria Giulia ULg

in Nouveaux Actes Sémiotiques (2007, December 14)

La première partie de cet article approche le problème de la véridiction de l’image et du jugement épistémique en prenant en considération la relation entre la textualité photographique et ses pratiques ... [more ▼]

La première partie de cet article approche le problème de la véridiction de l’image et du jugement épistémique en prenant en considération la relation entre la textualité photographique et ses pratiques de production et de réception. On porte l’attention sur le fait que la textualité, qu’elle soit ou non photographique, ne peut pas être étudiée uniquement à partir de ses configurations plastiques et figuratives et de la constatation d’une cohérence sémiotique interne à l’image. En effet sa signification dépend fortement de ses pratiques productives (ou mieux encore de ce qu’on connaît des pratiques productives), de ses dispositifs « présentationnels » (comme par exemple l’album de famille, les affiches, la presse, Internet, etc.), de ses statuts (scientifique, documentaire, testimoniale, artistique, publicitaire) et de son histoire interprétative. La seconde partie de l’article analyse les stratégies énonciatives d’un reportage sportif, les Jeux Olympiques d’été de 2004 à Athènes. Le corpus d’images pris en considération construit différentes configurations de point de vue et diverses manières de mettre en présence de l’observateur le corps de l’athlète : des corps en action, des corps fatigués, des corps en équilibre, des corps concentrés, des corps tendant vers le but, enfin des corps avec lesquels nous construisons une « relation inhérente » grâce à une saisie analogisante. Nous avons ainsi individualisé trois types de mise en présence du corps et trois types de temps présent. Dans le premier type de présent, appelé dimensionné, le mouvement corporel entre en résonance avec la « traînée » des moments retenus et la « protension » de ceux qui se profilent comme possibles ; le second type est un présent d’appariement : dans ce deuxième cas l’exploration perceptive du photographe et du récepteur de l’image se coordonnent avec l’alternance des « points d’attaque » synchronisés des corps dansants. Le troisième type de présent, intervalle-échantillon, enfin, construit l’athlète en tant qu’identité et conscience en acte. [less ▲]

Detailed reference viewed: 55 (4 ULg)
Full Text
See detailAnalyse pluviométrique au Niger : récentes modifications et impacts environnementaux. Focus sur la région de Gouré, Niger oriental.
Ozer, Pierre ULg

Conference (2007, December 13)

Depuis la fin des années 1960, la région sahélienne est touchée par une terrible sécheresse. Cet article analyse les variations climatiques enregistrées dans la région de Gouré, Niger oriental, entre 1936 ... [more ▼]

Depuis la fin des années 1960, la région sahélienne est touchée par une terrible sécheresse. Cet article analyse les variations climatiques enregistrées dans la région de Gouré, Niger oriental, entre 1936 et 2003. Il apparaît que la zone étudiée est sortie de la « Grande Sécheresse » à la fin des années 1980. Cependant, les conséquences de ce retour à des conditions plus humides ne se seraient pas accompagné d’une amélioration significative de la longueur de la saison des pluies. [less ▲]

Detailed reference viewed: 71 (8 ULg)
See detailLes glomérulonéphrites
Krzesinski, Jean-Marie ULg

Conference (2007, December 11)

Detailed reference viewed: 3 (0 ULg)
Full Text
See detailDecontamination of Resistant Emerging Pathogens
Melin, Pierrette ULg

Conference (2007, December 11)

Detailed reference viewed: 3 (0 ULg)
See detailThe role of Constitutional Courts as positive framework-legislators
Behrendt, Christian ULg

Conference (2007, December 11)

Conference in comparative constitutional law given in 2007 at the Law Faculty of the Erasmus University of Rotterdam (Erasmus Law School), and exposing the results of my PhD research, published in 2006 ... [more ▼]

Conference in comparative constitutional law given in 2007 at the Law Faculty of the Erasmus University of Rotterdam (Erasmus Law School), and exposing the results of my PhD research, published in 2006, on the role of Constitutional Courts as framework-legislators. [less ▲]

Detailed reference viewed: 67 (0 ULg)
See detailNumerical and experimental characterization of flow in a radial flow cell with aspect ration one.
Detry, Jean; Jensen, B.; Koitzsch, R. et al

Conference (2007, December 10)

Detailed reference viewed: 8 (4 ULg)
Full Text
See detailCauses et mécanismes de la perte de l’aptitude au fractionnement du maïs séché à haute température
Malumba Kamba, Paul ULg; Deroanne, Claude; Masimango, Thaddée et al

Poster (2007, December 10)

Le séchage par entrainement d’air chaud dénature les principales familles des protéines du maïs, ce qui entraine la diminution de leur solubilité. Les températures élevées de séchage induisent également ... [more ▼]

Le séchage par entrainement d’air chaud dénature les principales familles des protéines du maïs, ce qui entraine la diminution de leur solubilité. Les températures élevées de séchage induisent également une diminution de l’aptitude à l’imprégnation d’eau des grains lors du trempage des maïs avec pour conséquence la diminution du ramollissement des grains, ce qui occasionne des moutures imparfaites et une réduction de la libération des granules d’amidon lors des phases de séparation de l’amidon et des protéines. La fonction logistique à deux asymptotes permet une meilleure prévision des rendements d’extraction de l’amidon et des quantités des glutens récoltées au tamisage en fonction de la température du séchage. [less ▲]

Detailed reference viewed: 27 (7 ULg)
See detailSalt, hypertension and the kidneys
Krzesinski, Jean-Marie ULg

Conference (2007, December 07)

Detailed reference viewed: 4 (0 ULg)
See detailLes apories du matérialisme dialectique
Seba, Jean-Renaud ULg

Conference (2007, December 07)

Detailed reference viewed: 39 (3 ULg)
Full Text
See detailConciliation qualité de vie au travail et qualité de vie en général
Etienne, Anne-Marie ULg

Conference (2007, December 07)

Detailed reference viewed: 34 (0 ULg)
See detailRisque cardiovasculaires chez les jeunes étudiants
Krzesinski, Jean-Marie ULg

Conference (2007, December 07)

Detailed reference viewed: 4 (1 ULg)
Full Text
See detailFrom the numerisation of the Soil Map of Wallonia to a real information and management tool
Legrain, Xavier ULg; Bah, Boubacar Billo ULg; Veron, Philippe et al

Poster (2007, December 05)

Detailed reference viewed: 33 (6 ULg)
See detailRegulation of CXCL8/IL-8 by Zonula Occludens-1 during breast tumor-associated epithelial-to-mesenchymal transitions.
Mestdagt, M; Polette, M; Bindels, S et al

Poster (2007, December 05)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailFunctional Characterization of Snail2 Mediated E-Cadherin repression
Molina Ortiz, Patricia ULg; MacPherson, Matthew; Cano, Amparo et al

Poster (2007, December 02)

Snail2, also called Slug, is a member of the Snail-family of zinc-finger transcription factors that plays a significant role both during development and carcinogenesis, by controlling epithelial ... [more ▼]

Snail2, also called Slug, is a member of the Snail-family of zinc-finger transcription factors that plays a significant role both during development and carcinogenesis, by controlling epithelial-mesenchymal transition (EMT) processes. Snail2 has been also described as a direct transcriptional repression of E-cadherin during EMT being implicated as a prosurvival factor during tumorogenesis. Snail1 and Snail2 are highly homologous factors, containing a common N-terminal transrepressor domain (SNAG), a C-terminus DNA binding domain of four (Snail1) or five (Snail2) zinc fingers, and a divergent central region, which in Snail2 is formed by a unique domain called `Slug domain´ whose function remains to be elucidated. Snail1 repressor activity has been shown to be dependent on SNAG-mediated interaction with a repression complex formed by the corepressor mSin3a and histone deacetylases 1/2 (HDAC1/2). Importantly Snail1 transcription factor is further regulated through phosphorylation by various kinases. However, at date little is known about the control of Snail2 repressor activity. Here, we present interesting data shedding light into the regulation and function of Snail2 as a E-cadherin repressor. For this purpose we have performed ectopic expression of several Snail2 deletion mutants and examined the contribution of the specific domains to protein stability, localization and E-cadherin repressor activity. These data reveal a key role for the `Slug domain´ to repress E-cadherin expression. Furthermore, in vivo phosphorylation analysis revealed that specific phosphorylation on Snail2 protein is implicated in Snail2 function as a transcriptional repressor whose functional significance is currently being investigated. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailDetección del BLV en muestras de semen de toros seropositivos
Rossich, L.; Gutiérrez, G.; Rodriguez, Sabrina ULg et al

Poster (2007, December 02)

Detección del BLV en muestras de semen de toros seropositivos Rossich Luciano1; Gutierrez Geronimo1; Rodriguez Sabrina1; Lefebvre Eduardo2; Trono Karina1; Dus Santos Maria Jose1. (1) Instituto de ... [more ▼]

Detección del BLV en muestras de semen de toros seropositivos Rossich Luciano1; Gutierrez Geronimo1; Rodriguez Sabrina1; Lefebvre Eduardo2; Trono Karina1; Dus Santos Maria Jose1. (1) Instituto de Virología, CICVyA, INTA-Castelar. CC 77. Buenos Aires, Argentina. (2) Centro de Inseminación Artificial La Elisa. Argentina. La principal ruta de transmisión del Virus de la Leucosis Bovina (BLV) es horizontal y esta dada por la exposición directa de fluidos biológicos contaminados con linfocitos infectados; principalmente sangre. A pesar de que antígenos virales y ADN proviral han sido identificados en semen, leche y calostro; la transmisión natural a través de estas secreciones no ha sido demostrada. El impacto sanitario y económico de la infección por BLV esta asociada con la interferencia en el movimiento internacional del ganado vacuno y su germoplasma. Datos experimentales soportan la improbabilidad de que el semen congelado de toros seropositivos para BLV puedan infectar vacas receptoras, sin embargo, aun hoy existen restricciones para la comercialización de semen de animales infectados. Dado que no existe vacuna ni tratamiento aplicable, la erradicación y control de la enfermedad esta exclusivamente basada en el diagnóstico temprano y segregación de los animales infectados. En este contexto la especificidad y la sensibilidad del diagnóstico utilizado constituyen un punto crítico. Hemos desarrollado previamente una PCR con alta sensibilidad y especificidad para detectar el genoma de BLV en muestras de semen congelado. El objetivo de este trabajo es el estudio del patrón de excreción natural de BLV en semen. Muestras de semen congelado de 30 toros seropositvos fueron analizados. Fue posible detectar ADN proviral en 144 de 752 muestras. La detección del genoma del BLV ha ocurrido en varias colecciones pero en forma alternada con períodos de no detección. Adicionalmente, la presencia de ARN proviral en sangre y muestras de sangre fue evaluada. [less ▲]

Detailed reference viewed: 17 (0 ULg)
See detailTitan Airglow Spectra from Cassini UVIS
Ajello, J. M.; Gustin, Jacques ULg; Stevens, M. et al

Conference (2007, December 01)

We present the first UV airglow observations of Titan's atmosphere by the Ultraviolet Imaging Spectrograph (UVIS) on Cassini. The known UV emissions of Titan have been examined with higher spectral ... [more ▼]

We present the first UV airglow observations of Titan's atmosphere by the Ultraviolet Imaging Spectrograph (UVIS) on Cassini. The known UV emissions of Titan have been examined with higher spectral resolution (0.4 nm FWHM) by the Cassini UVIS than in the past by the Voyager Ultraviolet Spectrometer (UVS) (3.0 nm FWHM). The UVIS observations, confirming Voyager UVS results, have shown that molecular nitrogen is the major constituent of the upper atmosphere of Titan. Using one spectral channel in the EUV from 56--118 nm and one in the FUV from 112--191 nm, the UVIS observed the disk on 13 December, 2004. The combined EUV and FUV spectral region is a probe of the stratosphere-mesosphere-thermosphere-exosphere region from about 300--2000 km. The EUV spectrum consists of three band systems of N2 (b {1}Πu, b' {1}Σu+, c{4'} {1}Σ{u+}--X {1}Σ{g+}), while the FUV spectrum consists of one N2 (a {1}Πg--X {1}Σ{g+}). The UVIS observations reveal that the c{4'}(0)--X(0) vibrational band near 95.8 nm is suppressed, and that N \sc{i} multiplets near 95.32 and 96.45 nm are present instead. Magnetospheric particle excitation is weak on this orbit, since the nightside EUV spectrum shows no observable N2 emission features and only H Lyman-β. The absence of significant darkside emission demonstrates that nitrogen emissions are predominantly excited on this orbit by photoelectrons near 900 km in the thermosphere. Above 145 nm most of the observed signal is due to sunlight reflected by N2 in the Titan mesosphere-stratosphere and modified by aerosol and hydrocarbon absorption. Mixing ratios of C2H2, C4H2, C2H4 and tholins have been derived from the reflected sunlight emission between 145 and 190 nm, using a Rayleigh scattering model. Assuming that the energy deposition at these wavelengths occurs near 300 km, these mixing ratios are in good agreement with recent photochemical models and previous Voyager observations in the IR. We also present the first geometric albedo measurement of Titan from 150--190 nm. [less ▲]

Detailed reference viewed: 18 (0 ULg)
Full Text
See detailDetermination du profil en acides gras du lait par spectroscopie moyen infrarouge.
Dehareng, Frédéric; Soyeurt, Hélène ULg; Veselko, Didier et al

in 14 emes Recontres autour des recherches sur les ruminants, Paris, les 5et 6 Decembre 2007 (2007, December 01)

Detailed reference viewed: 107 (8 ULg)
Full Text
See detailRadial Velocities and Atmospheric Parameters of Field Stars Suitable for RAVE Tests
Valentini, Marica ULg; Munari, U.; Tantalo, R. et al

in From Stars to Galaxies: Building the Pieces to Build Up the Universe (2007, December 01)

With the Asiago 1.82m telescope + Echelle spectrograph we have obtained high resolution spectra of 25 RAVE targets well distributed in atmospheric parameters. From them we have derived radial velocities ... [more ▼]

With the Asiago 1.82m telescope + Echelle spectrograph we have obtained high resolution spectra of 25 RAVE targets well distributed in atmospheric parameters. From them we have derived radial velocities and T_{eff}, log g, [M/H], V_{rot} sin i to the aim of serving as an external test for corresponding values derived from RAVE spectra. [less ▲]

Detailed reference viewed: 2 (0 ULg)