References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
See detailSimenon et les médias
Tomasovic, Dick ULg

Conference (2003, February 22)

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailDevelopment of a metrology and figuring machine for large X-ray mirror
Gailly, Patrick ULg; de Chambure, Daniel; Collette, Jean Paul et al

Conference (2003, February 20)

To improve the image quality of X-ray replicated mirror, A new metrology machine has been built link to a ion beam figuring machine. The first one allows to accurately measure the shape of replicated X ... [more ▼]

To improve the image quality of X-ray replicated mirror, A new metrology machine has been built link to a ion beam figuring machine. The first one allows to accurately measure the shape of replicated X-ray mirrors. The machine is dedicated to cylindrical mirrors shape whose dimensions can vary from 50 to 800 mm in height and 600 to 800 mm in diameter. The present contribution will sum up the results achieved with this machine on an actual mirror. The machine calibration results and the data analysis to obtain the mirror final shape will be detailed. The final results are compared with other measurements performed by a traditional 3-D machine. The second one is a dedicated ion figuring machine dedicated for the figuring of the X-ray mirrors. The preliminary tests were undertaken to evaluate the ion figuring process on Nickel replicated surfaces. Those results were used to improve the design of the figuring machine, a detailed description of that machine follows. The reliability of the ion figuring process is shown through an actual problem. Finally, some leading remarks about the improvements of the ion figuring ion machine and the ion figuring process in general are drawn. [less ▲]

Detailed reference viewed: 18 (2 ULg)
See detailLes conseils de fumure azotée
Bodson, Bernard ULg; Destain, Jean-Pierre ULg; Vancutsem, Françoise ULg et al

in Fumure et Protection phytosanitaire des céréales (2003, February 19)

Detailed reference viewed: 2 (0 ULg)
Full Text
See detailEvolution du fractionnement de la fumure azotée
Bodson, Bernard ULg; Vancutsem, Françoise ULg; Destain, Jean-Pierre ULg et al

in Fumure et protection phytosanitaire des céréales (2003, February 19)

Detailed reference viewed: 11 (2 ULg)
Full Text
See detailFongicides: quelle stratégie adpoter?
Vancutsem, Françoise ULg; Bodson, Bernard ULg

in Fumure et protection phytosanitaire des céréales (2003, February 19)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailProperties of localized, high latitude, dayside aurora
Frey, H. U.; Immel, T. J.; Lu, G. et al

Conference (2003, February 19)

[1] The FUV instrument on the IMAGE spacecraft frequently observes intense ultraviolet (UV) emission from a localized dayside region poleward of the general auroral oval location. One type of these ... [more ▼]

[1] The FUV instrument on the IMAGE spacecraft frequently observes intense ultraviolet (UV) emission from a localized dayside region poleward of the general auroral oval location. One type of these emissions has been described as the signature of direct proton precipitation into the cusp after lobe reconnection during northward interplanetary magnetic field (IMF) and high solar wind dynamic pressure periods [Frey et al., 2002]. Here we describe a completely different type of high latitude aurora, which does not show any signature of precipitating protons. It also occurs during northward IMF conditions however, only during periods of very low solar wind dynamic pressure. It occurs at a much higher geomagnetic latitude than the normal cusp location and only during periods of positive IMF By. The intensity of the UV emission is somewhat anti-correlated with the solar wind dynamic pressure, much in contrast to the cusp emission. The brightness of the localized emission changes rapidly on time scales between 30 and 70 minutes without corresponding changes in solar wind properties. Coincident measurements by the FAST spacecraft verify that this is not the cusp, that ion precipitation is absent in these regions, and that strong precipitation of field-aligned accelerated electrons causes the aurora. We interpret this aurora as the optical signature of electron precipitation in the upward leg of a current system which closes the downward leg of the current system into the cusp in the ionosphere. [less ▲]

Detailed reference viewed: 10 (1 ULg)
Full Text
See detailLes mesures agri-environnementales
Buyze, Olivier; Doguet, Marie-Paule; Bontemps, Pierre-Yves et al

in Fumure et protection phytosanitaire des céréales (2003, February 19)

Detailed reference viewed: 39 (4 ULg)
See detailDiabète et hypertension artérielle
Krzesinski, Jean-Marie ULg

Conference (2003, February 15)

Detailed reference viewed: 3 (0 ULg)
See detailEtude ALLHAT : intérêt
Krzesinski, Jean-Marie ULg

Conference (2003, February 13)

Detailed reference viewed: 2 (0 ULg)
See detailLe Campylobacter fetus.
HUYNEN, Pascale ULg

Conference (2003, February 05)

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailAchromatic four quadrants phase mask coronagraph using the dispersion of form birefringence
Mawet, Dimitri; Lenaerts, Cedric ULg; Moreau, Vincent et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2003, February 01)

We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually ... [more ▼]

We describe an alternative design for the 4-quadrant phase mask coronagraph described recently by Rouan et al. 2000. Based on the same principle, i.e. producing a very efficient nulling by mutually destructive interferences of the coherent light from the main source, our mask realises the pi phase shift using some properties of ZOGs (Zeroth Order Gratings) and according to an original scheme respecting the 4-quadrant symmetry. When the period of the one-dimension grating structure is smaller than the wavelength of the incident light, the structure becomes birefringent. The effective refractive indices depend on the wavelength. Using this feature, we can design a mask whose nulling e±ciency is maintained within a wide wavelength range. Numerical simulations were made according to the RCWT (Rigorous Coupled Wave Theory). [less ▲]

Detailed reference viewed: 19 (8 ULg)
Full Text
See detailInfluence of optical path delay control on a ground-based nulling interferometer
Absil, Olivier ULg; Coude du Foresto, Vincent

in Traub, Wesley (Ed.) Interferometry for Optical Astronomy II (2003, February 01)

Atmospheric turbulence is a major source of noise in any fiber-linked interferometer through the piston effect between the two arms of the interferometer which induces an erratic movement of the fringes ... [more ▼]

Atmospheric turbulence is a major source of noise in any fiber-linked interferometer through the piston effect between the two arms of the interferometer which induces an erratic movement of the fringes. Because the stellar light has to be permanently cancelled by the central dark fringe, a ground-based nulling interferometer is not possible without stringent optical path delay (OPD) control. In this paper, we investigate the influence of the residual OPD error of a fringe tracking unit on the performances of a nulling interferometer. The accuracy required for this control system strongly depends on the observation wavelength. If we want to detect exozodiacal clouds ten times as dense as our zodiacal dust cloud in the near-infrared (L' band), the performances of the fringe tracker are crucial: the residual OPD should be about 20 nanometers RMS. This specification can only be reached if the fringe sensor is optimized for bright sources. In the mid-infrared (N band), the requirements are strongly relaxed: OPD control with an accuracy of 400 nm RMS is sufficient to be background-limited, but a lower residual OPD (about 50 nm RMS) is strongly recommended to reduce the stellar leakage. [less ▲]

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailInfrared colours of star-forming galaxies and a flux calibration of ISOCAM ELAIS catalogues
Vaisanen, Petri; Morel, Thierry ULg

in Exploiting the ISO Data Archive. Infrared Astronomy in the Internet Age (2003, February 01)

We present J and K-band near-infrared photometry of a sample of ISOCAM sources detected by the European Large Area ISO-Survey (ELAIS). All of the high-reliability LW2 (6.7 μm) sources and 80 per cent of ... [more ▼]

We present J and K-band near-infrared photometry of a sample of ISOCAM sources detected by the European Large Area ISO-Survey (ELAIS). All of the high-reliability LW2 (6.7 μm) sources and 80 per cent of the LW3 (15 μm) sources are identified in the near-IR survey reaching K â 17.5 mag. The near- to mid-IR flux ratios can effectively be used to separate stars from galaxies in mid-IR surveys: at 6.7 μm, 80 per cent of the identified ELAIS objects are stars while at 15 μm 80 per cent are galaxies. The stars are then used to perform an accurate new calibration of the ELAIS ISOCAM data at both 6.7 and 15 μm: we adopt values of 1.23 and 1.05 ADU/gain/s/mJy for the LW2 and LW3 filters, respectively. The ISOCAM ELAIS survey is found to mostly detect strongly star-forming late-type galaxies. We show that near to mid-IR colour-colour diagrams can be used to further classify galaxies, as well as study star-formation. In a [15/2.2] vs. [6.7/2.2] plot the Hubble type of a galaxy can be roughly estimated from its position along the diagonal ([6.7/15] = 1) and the star-forming efficiency from a galaxys departure from the diagonal (eg. [6.7/15] <1). The ELAIS galaxies yield an average mid-IR flux ratio LW2/LW3 =0.67 ± 0.27. We discuss this [6.7/15] ratio as a star formation tracer using ISO and IRAS data of a local comparison sample. The [2.2/15] ratio is also found to be a good indicator of activity level in galaxies and conclude that the drop in the [6.7/15] ratio seen in strongly star-forming galaxies is a result of both an increase of 15 μm emission and an apparent depletion of 6.7 μm emission. [less ▲]

Detailed reference viewed: 7 (1 ULg)
Full Text
See detailInherent modulation: a fast chopping method for nulling interferometry
Absil, Olivier ULg; Karlsson, Anders; Kaltenegger, Lisa

in Shao, Michael (Ed.) Interferometry in Space (2003, February 01)

The reduction of the thermal background emission from the local and exozodiacal dust clouds is a critical element for the success of ESA's space mission, DARWIN. Internal modulation, a technique using ... [more ▼]

The reduction of the thermal background emission from the local and exozodiacal dust clouds is a critical element for the success of ESA's space mission, DARWIN. Internal modulation, a technique using fast signal chopping, isolating the planetary signal from these noise sources, was proposed by Mennesson and Léger. In this paper, a short review of internal modulation is given, and new configurations with internal modulation are proposed to reduce the complexity of the beam-combining optics. A modification to the implementation of internal modulation is then investigated. It provides similar performance with a single detector and a greatly simplified optical layout: the number of beam-combiners is reduced by a factor of about two. The principle of inherent modulation is different from internal modulation in that no sub-interferometers are used: different phase shifts are applied to the input beams before recombination such that an asymmetric transmission map is obtained directly, without plus or minuspi/2 modulation as used in internal modulation. By combining the phase shifts and the input beams differently a transposed transmission map is obtained, allowing the signal to be chopped. During operations, multiplexing between the two interferometers is performed, such that at any time only one interferometer is being used. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Full Text
See detailDarwin ground-based European nulling interferometer experiment (GENIE)
Gondoin, Philippe; Absil, Olivier ULg; Fridlund, C V Malcolm et al

in Traub, Wesley (Ed.) Interferometry for Optical Astronomy II (2003, February 01)

Darwin is one of the most challenging space projects ever considered by the European Space Agency (ESA). Its principal objectives are to detect Earth-like planets around nearby stars and to characterize ... [more ▼]

Darwin is one of the most challenging space projects ever considered by the European Space Agency (ESA). Its principal objectives are to detect Earth-like planets around nearby stars and to characterize their atmospheres. Darwin is conceived as a space "nulling interferometer" which makes use of on-axis destructive interferences to extinguish the stellar light while keeping the off-axis signal of the orbiting planet. Within the frame of the Darwin program, the European Space Agency (ESA) and the European Southern Observatory (ESO) intend to build a ground-based technology demonstrator called GENIE (Ground based European Nulling Interferometry Experiment). Such a ground-based demonstrator built around the Very Large Telescope Interferometer (VLTI) in Paranal will test some of the key technologies required for the Darwin Infrared Space Interferometer. It will demonstrate that nulling interferometry can be achieved in a broad mid-IR band as a precursor to the next phase of the Darwin program. The present paper will describe the objectives and the status of the project. [less ▲]

Detailed reference viewed: 37 (2 ULg)
Full Text
See detailDesign and tests for the heliospheric imager of the STEREO mission
Defise, Jean-Marc ULg; Halain, Jean-Philippe ULg; Mazy, Emmanuel ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2003, February 01)

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2005. The two HI instruments will provide stereographic image pairs of solar ... [more ▼]

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2005. The two HI instruments will provide stereographic image pairs of solar coronal plasma and coronal mass ejections (CME) over a wide field of view (~90°), ranging from 13 to 330 R[SUB]0[/SUB]. These observations compliment the 15 R[SUB]0[/SUB] field of view of the solar corona obtained by the other SECCHI instruments (2 coronagraphs and an EUV imager). The key challenge of the instrument design is the rejection of the solar disk light, with total straylight attenuation of the order of 10[SUP]-13 [/SUP]to 10[SUP]-15[/SUP]. A multi-vane diffractive baffle system has been theoretically optimized to achieve the lower requirement (10[SUP]-13[/SUP] for HI-1) and is combined with a secondary baffling system to reach the 10[SUP]-15[/SUP] rejection performance in the second camera system (HI-2). This paper presents the last updates of the SECCHI/HI design concept, with the expected performance. A verification program is currently in progress. The on-going stray-light verification tests are discussed. A set of tests has been conducted in air, and under vacuum. The results are presented and compared with the expected theoretical data. [less ▲]

Detailed reference viewed: 12 (4 ULg)
Full Text
Peer Reviewed
See detailDecentralized local backup LSP calculation with efficient bandwidth sharing
Mélon, Laurent; Blanchy, François; Leduc, Guy ULg

in 10th IEEE International Conference on Telecommunications (2003, February)

This paper focuses on the protection of virtual circuits (Label Switched Paths, LSPs) in a (G)MPLS (Generalised Multi-Protocol Label Switching) network. The proposed algorithm is designed to protect ... [more ▼]

This paper focuses on the protection of virtual circuits (Label Switched Paths, LSPs) in a (G)MPLS (Generalised Multi-Protocol Label Switching) network. The proposed algorithm is designed to protect traffic with strong delay requirements such as EF (Expedited Forwarding) ordered aggregates in a DiffServ domain. For this type of application endto- end recovery schemes are usually considered to be far too slow. Local, fast-rerouting is the only solution which can compete with restoration times offered by SONET self-healing ring. However local restoration has a cost in terms of extra bandwidth consumed for the backup paths. Our scheme thus includes a sophisticated resource aggregation mechanism based on the concepts of "backup-backup aggregation" and "backupprimary aggregation". The path selection algorithm is also designed to efficiently reduce the resource usage. Moreover, when considering LSPs at different preemption levels, our algorithm is able to correctly calculate the amount of bandwidth that can be preempted despite the sharing of resource. We show that our approach, though local, can compete with the state-of-theart end-to-end recovery schemes in terms of resource reservation. The major contribution of our scheme, the "backup-primary aggregation", was then also used in the context of end-to-end recovery and improved its performance substantially. [less ▲]

Detailed reference viewed: 28 (1 ULg)
See detailLa fibromyalgie : exploration fonctionnelle musculaire
Maquet, Didier ULg; Croisier, Jean-Louis ULg; Demoulin, Christophe ULg et al

in Abstract book des Mardis de la Kinésithérapie 2003 (2003, February)

Detailed reference viewed: 41 (2 ULg)
Full Text
Peer Reviewed
See detailHuman-Visual-System-Based Fusion of Multimodality 3D Neuroimagery using Brain-Shift-Compensating Finite-Element-Based Deformable Models
Verly, Jacques ULg; Vigneron, Lara; Petitjean, Nicolas et al

in Proceedings of SPIE (2003, February), 5029

Our goal is to fuse multimodality imagery to enhance image-guided neurosurgery. Images that need to be fused must be registered. Registration becomes a challenge when the imaged object deforms between the ... [more ▼]

Our goal is to fuse multimodality imagery to enhance image-guided neurosurgery. Images that need to be fused must be registered. Registration becomes a challenge when the imaged object deforms between the times the images to be fused are taken. This is the case when “brain-shift” occurs. We begin by describing our strategy for nonrigid registration via finite-element methods. Then, we independently discuss an image fusion strategy based on a model of the human visual system. We illustrate the operation of many components of the registration system and the operation of the fusion system. [less ▲]

Detailed reference viewed: 29 (4 ULg)
Peer Reviewed
See detailPit-I and other somatotrope candidate genes to optimize selection for milk traits in bovine species: the 21 century's strategy.
Parmentier, Isabelle; Gillard, Nathalie; Abras, Sven et al

Poster (2003, February)

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailRegulation of training system for adults in educational technology
Denis, Brigitte ULg; Piette, Sylvie-Anne

in Stacey, E.; Davies, E. (Eds.) Quality education @ a distance (2003, February)

This paper reports the characteristics of a post graduate diploma on educational technologies based on a combination of face-to-face and distance activities and assesses its quality. We first define the ... [more ▼]

This paper reports the characteristics of a post graduate diploma on educational technologies based on a combination of face-to-face and distance activities and assesses its quality. We first define the bases of the training program and present several tools (logbook, portfolio and questionnaires) which have been used to evaluate and regulate both training and individual learning process. Our observations indicate an increase and better regulation of the quality of the educational and learning processes. On the basis of the results we achieved, we propose that our original design could be extended to similar adult training programs. The way this innovative system is integrated in the universities shows an evolution due to its success that implies a certain kind of return on investment due to the demand of such kinds of device. [less ▲]

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
See detailRouting in a MPLS network featuring preemption mechanisms
Blanchy, François; Mélon, Laurent; Leduc, Guy ULg

in 10th IEEE International Conference on Telecommunications (2003, February)

In the context of Multiprotocol Label Switching (MPLS), we propose an integration of a computationally efficient preemption mechanism into a very dynamic Label Switched Paths (LSPs) routing scheme ... [more ▼]

In the context of Multiprotocol Label Switching (MPLS), we propose an integration of a computationally efficient preemption mechanism into a very dynamic Label Switched Paths (LSPs) routing scheme described in a previous paper. This preemption scheme includes a quick heuristic able to select the most interesting LSPs to reroute from a link. The efficiency of this algorithm is obtained through a very rigid but seemingly appropriate policy concerning which LSPs are appropriate for preemption. A feedback from preemption on the routing process is proposed, in order to regulate the rate of the reroutings and to tune the balance between stability and continuous reorganization in a network. This integrated traffic engineering entity is tested on the accuracy of the heuristic, the relevance of the feedback and the whole integration, the influence of the routing policy on the preemption mechanism and the reliability of the managed network. [less ▲]

Detailed reference viewed: 35 (2 ULg)
Peer Reviewed
See detailNouveaux analogues du cromakalim en tant qu’agents pharmacologiques potentials de la classe des activateurs des canaux KATP
Sebille, S.; Boverie, S.; De Tullio, Pascal ULg et al

Conference (2003, January 31)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailEtude de la sélectivité tissulaire d’un nouvel antagoniste des récepteurs au thromboxane A2, le BM-613
Hanson, Julien ULg; Rolin, S.; De Leval, X. et al

Poster (2003, January 31)

Detailed reference viewed: 7 (0 ULg)
See detailSélection dans les conditions subtropicales d’une bactérie lactique aux propriétés probiotiques.
Bayane, A.; Diawara, B.; Roblain, D. et al

Poster (2003, January 22)

Detailed reference viewed: 4 (1 ULg)
See detailMéthode rapide de sélection de bactéries probiotiques par choc osmotique et marquage aux fluorochromes
Sow, M.; Roblain, D.; Thonart, Philippe ULg

Poster (2003, January 22)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailPISA, a powerful tool to foster literacy development.
Lafontaine, Dominique ULg

Conference (2003, January 10)

Detailed reference viewed: 14 (2 ULg)
Full Text
See detailCalcification and organic production of coccolithophorids Emiliania huxleyi under different atmospheric pCO2 in a mesocosm experiment
Delille, Bruno ULg; Harlay, Jérôme ULg; Chou, Lei et al

Poster (2003, January 07)

The response of primary production and calcification of the coccolithophorid Emiliania huxleyi to different partial pressures of CO2 (p CO2) have been investigated during a mesocosm bloom experiment in a ... [more ▼]

The response of primary production and calcification of the coccolithophorid Emiliania huxleyi to different partial pressures of CO2 (p CO2) have been investigated during a mesocosm bloom experiment in a Norwegian fjord. Glacial, present and next century atmospheric p CO2 conditions (respectively 180, 370 and 700 ppmV) have been simulated above the surface of large sea-water enclosures. If production of organic matter remains constant under elevated p CO2, the production of inorganic carbon appears to be affected in two ways. First, the beginning of calcification is delayed. Second, the production rate of inorganic carbon appears to be lowered by 40% in the future conditions, decreasing subsequently the calcification/photosynthesis ratio from 1 to 0.6. During the experiment a strong viral growth have been experienced, which have seriously depressed calcification as well. We propose the threshold of 5.10 6 cell/ml for E huxleyi virus abundance above which the production and calcification of the population of E. huxleyi are severely affected. [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailAssessment of the importance of the carbonate pump in surface waters of the Bay of Biscay
Harlay, Jérôme ULg; Chou, Lei; Dedonder, Virginie et al

Poster (2003, January 07)

Marine carbon research in the past decade has been mainly devoted to the understanding and quantification of processes controlling the fluxes of organic matter in the ocean. Little attention has been paid ... [more ▼]

Marine carbon research in the past decade has been mainly devoted to the understanding and quantification of processes controlling the fluxes of organic matter in the ocean. Little attention has been paid until now to the particulate inorganic carbon whose net fluxes to the sediments are comparable to those of the organic matter. There remains still a large uncertainty in the production and the fate of biogenic calcium carbonate in the oceanic carbon cycle. In the framework of the Belgian global change programme, we have developed a project devoted to the study of the inorganic carbon cycle in the Bay of Biscay where coccolithophorid blooms occur frequently. The study focuses on processes associated with the oceanic production and dissolution of calcium carbonate, by combining field investigations, laboratory experiments and modelling efforts. The rate of primary production and of calcification by phytoplankton is evaluated by 14C incubation experiments during a coccolithophorid bloom-forming period in the area of investigation. The relative production of organic matter and calcium carbonate in the photic zone along a transect from the continental shelf across the slope to deep waters will be presented. A tentative mass balance of the carbon fluxes for this area will be constructed. These preliminary results confirm the importance that the calcium carbonate pump may play in open ocean. [less ▲]

Detailed reference viewed: 10 (0 ULg)
See detailCharacterization of marine CaCO3 particles in the context of Global Change
Aerts, Katrien; Godoi, Ricardo; Harlay, Jérôme ULg et al

Poster (2003, January 07)

The expected increase in greenhouse gasses concentrations as a result of human activity is leading to significant climate change in the coming years. The fate of the anthropogenic CO2 has been intensively ... [more ▼]

The expected increase in greenhouse gasses concentrations as a result of human activity is leading to significant climate change in the coming years. The fate of the anthropogenic CO2 has been intensively studied. Being the largest reservoir of reactive carbon, the ocean acts as an important sink for anthropogenic CO2 and plays a significant role on the global biogeochemical cycle of carbon and its perturbations. There remain, however, large uncertainties concerning the uptake of carbon by the ocean, mainly due to insufficient knowledge of processes controlling the carbonate chemistry in surface waters. The effects of precipitation of calcium carbonate by calcifying organisms in the euphotic zone and redissolution of their skeletons have not been fully taken into account. This precipitation-dissolution process affects both the concentration of dissolved inorganic carbon and of total alkalinity and plays thus a significant role in the buffering capacity of seawater and its potential to act as a sink or a source of CO2 for the atmosphere. We aim to study the processes associated with the oceanic production and dissolution of CaCO3 in order to quantify the role of calcifying phytoplanktonic organisms in sequestering CO2. The calcareous skeletons of Coccolithophores, which comprise one of the main groups of calcifying organisms in the photic zone of the ocean, are analysed. The gut content of copepods, which grazes on coccolithophores is examined by different methods like Electron Probe Micro-Analysis (EPMA) and Micro X-Ray Fluorescence (M-XRF) in order to detect the possible dissolution features at the calcite surface. Automatic EPMA is used for the characterization of individual particles from ocean samples for their composition, morphology and size. Subsequent statistical processing techniques classifies the particles into specific particle clusters. [less ▲]

Detailed reference viewed: 5 (2 ULg)
See detailCaractérisation physiologique de Bifidobactérium pour utilisation probiotique.
Majad, L.; Evrard, P.; Thonart, Philippe ULg

Poster (2003, January)

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailAppliquer le nez électronique pour reconnaître et suivre en continu de mauvaises odeurs dans l'environnement
Nicolas, Jacques ULg

Conference (2003, January)

Le nez électronique avec une configuration très simple fournit des résultats encourageants pour détecter une odeur dans l’environnement. Il existe un réel espoir de pouvoir fabriquer des instruments ... [more ▼]

Le nez électronique avec une configuration très simple fournit des résultats encourageants pour détecter une odeur dans l’environnement. Il existe un réel espoir de pouvoir fabriquer des instruments portables capables de prévoir une odeur inconnue en temps réel sur le terrain. Le monitoring des odeurs environnementales est un challenge, mais une simple estimation est suffisante, il n'y a pas besoin de conditions opératoires très rigoureuses. Il reste néanmoins beaucoup de travail à faire avant que le nez électronique ne devienne une réalité dans l’environnement. La communication présente ce challenge en l'illustrant par de nombreuses applications réalisées par l'équipe de recherche. [less ▲]

Detailed reference viewed: 56 (4 ULg)
Peer Reviewed
See detailExchange processes and nitrogen cycling on the shelf and slopes area of the Black Sea basin.
Grégoire, Marilaure ULg; Beckers, Jean-Marie ULg; Kostianoy, A. et al

Conference (2003, January)

Detailed reference viewed: 15 (2 ULg)
See detailEtude in vivo d’une adsorption de probiotique (Lb. Plantarum) au niveau du tractus intestinal d’un poulet
Dubois Dauphin, Robin ULg; Amor, L.; Roblain, D. et al

Poster (2003, January)

Detailed reference viewed: 3 (0 ULg)
See detail« Preuve et signature électronique des actes juridiques »,
Lecocq, Pascale ULg

in Delnoy, Paul (Ed.) Chronique de droit à l'usage des juges de paix et de police 2003 (2003, January)

Detailed reference viewed: 4 (0 ULg)
See detailVariability of air-sea CO2 fluxes in the Southern Ocean inferred from CARIOCA drifters, ships and remotely sensed measurements
Boutin, J.; Rangama, Y.; Etcheto, J. et al

Poster (2003, January)

Detailed reference viewed: 7 (0 ULg)
See detailFonds de vallée : quelle gestion pour un développement durable ?
Rosillon, Françis ULg

in Actes du séminaire préalable à la définition d'un programme de recherche interdisciplinaire (2003, January)

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailLes facteurs de succès dans l'accompagnement du portage à distance de cours
Delfosse, Catherine ULg; Harmeling, Danielle; Poumay, Marianne ULg et al

in Actes du Colloque des deuxièmes rencontres du Kirchberg. (2003, January)

This paper presents a reflection about the key success factors involved in the process of turning traditional courses into on-line active courses. Within the context of ‘FORMADIS’ and other programmes ... [more ▼]

This paper presents a reflection about the key success factors involved in the process of turning traditional courses into on-line active courses. Within the context of ‘FORMADIS’ and other programmes, more than twenty projects have been accompanied by the LabSET in the past 3 years. The paper gives an overview of the tools and methods used for teacher support and training. It examines the projects ‘doing well’ and analyse what makes them sucessful. It considers the moment at which the success factors take place (before, during and after the various phases of development). It illustrates these key factors with practical examples. Whereas the majority of these factors seem to be obvious, this analysis will help considering the relations between them as well as the way of managing them successfully. [less ▲]

Detailed reference viewed: 137 (8 ULg)
See detailApports de la recherche et outils mis en place pour la gestion et le contrôle de la qualité.
Sindic, Marianne ULg; Dardenne, Pierre

in L'avenir des filières de qualité différenciée. (2003, January)

Detailed reference viewed: 12 (1 ULg)
See detailEtude de l'hyperactivité bronchique induite par l'administration pulmonaire de cyclodextrines chez la souris
Bertholet, Pascal; Guéders, Maud ULg; Barillaro, Valery et al

Conference (2003, January)

Detailed reference viewed: 100 (1 ULg)
See detailEffects of a dust storm on the coupled Mars thermosphere ionosphere
Witasse, Olivier; Bougher, S. W.; Cerisier, Jean-Claude et al

Conference (2003)

Detailed reference viewed: 12 (0 ULg)
Peer Reviewed
See detailOndelettes et télédétection.
Charles, Catherine ULg

in Actes des XXXVèmes Journées de Statistiques (2003)

Detailed reference viewed: 13 (4 ULg)
Peer Reviewed
See detailSTAT5 promotes granulocyte survival during inflammation
Fievez, Laurence ULg; Desmet, Christophe ULg; Pajak, B. et al

Poster (2003)

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailAnalysis of PCDD/Fs in human blood plasma using CALUX bioassay and GC-HRMS: a comparison
Van Wouwe, Nathalie; Eppe, Gauthier ULg; Xhrouet, Céline ULg et al

in Organohalogen Compounds (2003)

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailHow ergodic is the Fragmentation of the Pyridine Cation ? A Maximum Entropy Ananlysis
Gridelet, E.; Locht, Robert ULg; Lorquet, Andrée ULg et al

in Anton, J.; Cederquist, H.; Larsson, M. (Eds.) et al 23rd International Conference on the Photonic, Electronic and Atomic Collisions: Book of Abstracts. (2003)

The experimental KER and the statistical distributions are compared by the Maximum Entropy Method. An Ergodicity Index F(E) is defined to measure the phase space sampling efficiency. This is applied to ... [more ▼]

The experimental KER and the statistical distributions are compared by the Maximum Entropy Method. An Ergodicity Index F(E) is defined to measure the phase space sampling efficiency. This is applied to the KERD of C4H4+ cation produced by the C5H5N+ -> HCN+C4H4+ fragmentation path. In this particular case the F(E) is found to decrease steadily with increasing internal energy. [less ▲]

Detailed reference viewed: 31 (6 ULg)
Peer Reviewed
See detailComment évoluent les représentations des publics demandeurs d'une formation professionnelle en informatique au cours des 15 dernières années ?
Chenu, Florent ULg; Mattar, C.; Mélotte, C.

in Actes en lignes des premières journées francophones de didactique des progiciels, Université de Paris Val de Marne, Juillet 2003. (2003)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailExperimental and numerical study on mechanoregulation of tissue differentiation around a loaded implant in a bone chamber
Van Oosterwyck; Geris, Liesbet ULg; Duyck, Joke et al

in Bischoff, G.; Hein, H.-J. (Eds.) Proceedings of the seventh conference of ESEM (2003)

Detailed reference viewed: 18 (0 ULg)
Full Text
Peer Reviewed
See detailFast, sensitive, and comprehensive analytical methods including three-dimensional analysis (GCXGC-TOFMS) for measuring halogenated persistent organic pollutants
Patterson, Donald G.; Turner, Wayman E.; Sjödin, Andreas et al

in Organohalogen Compounds (2003), 60-65

Detailed reference viewed: 17 (2 ULg)
See detailSynthèse d'analogues de tétraponérines, alcaloïdes défensifs des fourmis du genre tetraponera
Rouchaud, Anne; Durvaux, Christophe; Laurent, Pascal ULg et al

Poster (2003)

Les fourmis du genre Tetraponera appartiennent à la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d’attaque, ces fourmis disposent ... [more ▼]

Les fourmis du genre Tetraponera appartiennent à la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d’attaque, ces fourmis disposent leur abdomen latéralement et badigeonnent la cuticule de l’adversaire au moyen de leur aiguillon en forme de tire-ligne. L’injection en chromatographie gazeuse capillaire de cette sécrétion a montrés qu’elle était constituée de huit dérivés, les tétraponérine T-1 à T-8. Ces molécules se rattachent à des squelettes tricycliques originaux et possèdent des propriétés neurotoxiques et insecticides. Dans le cadre d’une étude structure-activité de ces alcaloïdes, nous nous sommes intéressés à la synthèse d’analogues basés sur un squelette decahydro-dipyrido[1,2-a : 1’,2’-c]pyrimidine. Les différentes conditions réactionnelles utilisées pour synthétiser ce squelette à partir de pipéridéine et de malonate de diéthyle, ainsi que la nature et la détermination de structure des produits obtenus dans chaque cas seront discutées. [less ▲]

Detailed reference viewed: 23 (1 ULg)
See detailThe mazer physics
Bastin, Thierry ULg

Conference (2003)

Detailed reference viewed: 9 (2 ULg)
Peer Reviewed
See detailMetabolic properties of bovine muscles: regulation by genetic and nutritional factors.
Hocquette, J. F.; Cabaraux, Jean-François ULg; Jurie, C. et al

in Book of absracts of the 54th Annual Meeting of the European Association for Animal Production (2003)

Detailed reference viewed: 2 (0 ULg)
Full Text
See detailDeficient splines wavelets
Bastin, Françoise ULg; Laubin, P.; Kerner, R. et al

in Group 24 : Physical And Mathematical Aspects Of Symmetries (2003), 173

Detailed reference viewed: 15 (0 ULg)
See detailForecasting Skill Assessment of a Doubly, Two-Way Nested Model of the Ligurian Sea driven by Assimilation of Sea Surface Temperature
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Rixen, M. et al

Conference (2003)

The GHER 3D primitive equation model is implemented with threedifferent resolutions: a low resolution model (1/4Ž°) coveringthe whole Mediterranean Sea, an intermediate resolution model (1/20Ž°)of the ... [more ▼]

The GHER 3D primitive equation model is implemented with threedifferent resolutions: a low resolution model (1/4Ž°) coveringthe whole Mediterranean Sea, an intermediate resolution model (1/20Ž°)of the Liguro-Provençal basin and a high resolution model (1/60Ž°)simulating the fine mesoscale structures in the Ligurian Sea. Boundaryconditions and the averaged fields (feedback) are exchanged betweentwo successive nesting levels. The model of the Ligurian Sea is also coupled with the assimilationpackage SESAM. It allows to assimilate satellite data and in situobservations using the local adaptative SEEK (Singular EvolutiveExtended Kalman) filter. Instead of evolving the error space by thenumerically expensive Lyapunov equation, a simplified algebraicequation depending on the misfit between observation and modelforecast is used. Starting from the 1st January 1998 the low and intermediate resolutionmodels are spun up for 18 months. The initial conditions for theLigurian Sea are interpolated from the intermediate resolutionmodel. The three models are then integrated until August 1999. Duringthis period AVHRR Sea Surface Temperature of the Ligurian Sea isassimilated. The results are validated by using CTD and XBT profilesof the SIRENA cruise from the SACLANT Center. In a second validation exercise,the AVHRR SST and model forecast %(not yet affected by the SST used for validation) are decomposed at different scalesusing a horizontal wavelet transform.The processes characteristic for each scale are isolated in the model and the SST images.The error statistics calculated on the wavelet amplitudes can thus be related to the ability of the model in forecasting the correspondingmarine processes. In a second validation exercise, the AVHRR SST and model forecast areboth decomposed at different scales using a horizontal wavelet transform.The characteristic processes for each scale are isolated in the modeland the SST images. The error statistics calculated on the waveletamplitudes can thus be related to the ability of the model inforecasting the corresponding marine processes. [less ▲]

Detailed reference viewed: 8 (2 ULg)
Full Text
Peer Reviewed
See detailStudy and comparison of multibeam photorefractive recordings and photorefractive crystals stack to holographic interferometry
Thizy, Cédric ULg; Georges, Marc ULg; Scauflaire, V. et al

in Delaye, Ph; Denz, C.; Mager, L. (Eds.) Photorefractive Effects, Materials, and Devices (2003)

Two techniques with the common objective to integrate multiple view holographic interferometry in one optical head are presented: multi recordings in a photorefractive BSO crystal and the use of a series ... [more ▼]

Two techniques with the common objective to integrate multiple view holographic interferometry in one optical head are presented: multi recordings in a photorefractive BSO crystal and the use of a series of BSO crystals as the recording medium. After a description of the principles we will show their application to holographic interferometry. The results will be presented and a comparison of the two methods, based on the quality of the interferograms, will be performed, showing the respective advantages and limitations of each technique compared to the other and to classical experiment of holographic interferometry. Up to four holograms have been recorded in one crystal, or two holograms in two crystals, corresponding to the four positions of illumination of the object [less ▲]

Detailed reference viewed: 8 (1 ULg)
See detailBauforschung et dendrochronologie
Hoffsummer, Patrick ULg

in De Jonge, Krista; Van Baelen, Koen (Eds.) Preparatory Architectural Investigation in the Restauration of Historical Buildings (2003)

Detailed reference viewed: 18 (0 ULg)
Peer Reviewed
See detailEtude rétrospective des causes médicales d’intolérance à l’effort chez 345 chevaux
Ponthier, Jérôme ULg; Van Erck, Emmanuelle; Art, Tatiana ULg et al

in Proceedings du Congrès de l'Association Vétérinaire Equine Française (AVEF) (2003)

Detailed reference viewed: 25 (5 ULg)
Peer Reviewed
See detailAcoustical communication of Przewalski horses (Equus przewalski Poliakov, 1881) in Hungary.
Dewasmes, J.; Woeger, F.; Huynen, Marie-Claude ULg et al

Poster (2003)

Detailed reference viewed: 3 (1 ULg)
See detailProduction de sons chez les Carapidae : approche multidisciplinaire
Parmentier, Eric ULg; Gennotte, Vincent ULg; Lagardère, Jean-Paul

Conference (2003)

Detailed reference viewed: 5 (0 ULg)
See detailThe identification of experimental microscopic hafting traces on lithic tools
Rots, Veerle ULg

in Le Sécretariat du Congrès (Ed.) Sessions Générales et Posters / General Sessions and Posters. Acts of the XIVth UISPP Congress University of Liège, Belgium, 2 – 8 September 2001 (2003)

Detailed reference viewed: 23 (0 ULg)
Full Text
Peer Reviewed
See detailThe architectural sketch and the concept of the absent interface
Leclercq, Pierre ULg

in Proceedings of theInternational Conference on Industrial Engineering and Production Management (2003)

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailElevated atmospheric CO2 influences ammonia oxidiser community structure and net nitrification
Carnol, Monique ULg; Malchair, Sandrine ULg

in International Symposium: Structure and Function of Soil Microbiota, Philipps-University Marburg, Germany, September 18-20, 2003 (2003)

Detailed reference viewed: 7 (2 ULg)
Full Text
Peer Reviewed
See detailLevels of PCDDs, PCDFs and PCBs in International Fast Food Samples
Focant, Jean-François ULg; Pirard, Catherine; De Pauw, Edwin ULg

in Organohalogen Compounds (2003), 60-65

Detailed reference viewed: 7 (0 ULg)
See detailSynthèse d'analogues de tétraponérines, alcaloïdes défensifs des fourmis du genre Tetraponera
Rouchaud, Anne; Durvaux, Christophe; Laurent, Pascal ULg et al

Poster (2003)

Les fourmis du genre Tetraponera appartiennent a la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d'attaque, ces fourmis disposent ... [more ▼]

Les fourmis du genre Tetraponera appartiennent a la sous-famille des Pseudomyrmecinae et sont exceptionnelles par leur comportement défensif particulier. En effet, en cas d'attaque, ces fourmis disposent leur abdomen latéralement et badigeonnent la cuticule de 1'adversaire au moyen de leur aiguillon en forme de tire-ligne. L'injection en chromatographie gazeuse capillaire de cette sécrétion a montre qu'elle était constituée de huit dérivés, les tétraponérines T-1 à T-8. Ces molécules se rattachent a des squelettes tricycliques originaux et possèdent des propriétés neurotoxiques et insecticides. Dans le cadre d'une étude structure-activité de ces alcaloïdes, nous nous sommes intéressés à la synthèse d'analogues basés sur un squelette décahydro-dipyrido[l,2-a : 1’,2'-c]pyrimidine. Ce travail s'inspire d'une synthèse des tétraponérines T-1, T-2, T-5 et T-6 basée sur la réaction « one pot» entre deux molécules de 1-pyrroline et du malonate de diéthyle pour former un lactame tricyclique. Les différentes conditions réactionnelles utilisées pour synthétiser la molécule à partir de 1-pipéridéine et de malonate de diéthyle, ainsi que la nature et la détermination de structure des produits obtenus dans chaque cas seront discutées. [less ▲]

Detailed reference viewed: 13 (2 ULg)
See detailConsidérations sur la rémunération en tant qu'objet de recouvrement
Georges, Frédéric ULg

in Espace judiciaire et social européen (2003)

Detailed reference viewed: 16 (0 ULg)
Peer Reviewed
See detailA Probabilistic Simultaneous Iterative Reconstruction Technique Approach Applied to Subsurface Seismic Tomography
Sage, Sandrine; Grandjean, Gilles; Verly, Jacques ULg

Conference (2003)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailNanostructured mesoporous TiO2, ZrO2 and SiO2 synthesis by using the non-ionic Cm(EO)n - inorganic alkoxyde system : toward a better understanding on the formation mechanism
Blin, Jean-Luc; Léonard, Alexandre ULg; Gigot, Laurent et al

in Studies in Surface Science and Catalysis (2003), 146

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailInfluence de la substitution du tourteau de soja par des graines de lupin, avec ou sans complément d'alpha-galactosidase, sur la digestibilité des régimes et la rétention azotée du porc en croissance
Froidmont, Eric; Schoeling, Olivia; Deliège, Françoise et al

in Journées Recherche Porcine (2003)

Detailed reference viewed: 21 (2 ULg)
Full Text
Peer Reviewed
See detailSérapis et l'aigle : polysémie d'un iconotype
Veymiers, Richard ULg

in Cannuyer, Christian (Ed.) Les lieux de culte en Orient. Jacques Thiry in honorem (2003)

Detailed reference viewed: 54 (9 ULg)
Full Text
Peer Reviewed
See detailLe modèle WOLF : outil de modélisation d'écoulement de crue, de dimensionnement et de gestion des ouvrages hydrauliques
Pirotton, Michel ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Actes du colloque annuel du CEBEDEAU : Gestion des eaux pluviales et assainissement (2003)

Detailed reference viewed: 32 (4 ULg)
See detailIntoxications aiguës au méthanol et à l'éthylène glycol
Charlier, Corinne ULg

Conference (2003)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailLa voie transobturatrice de dedans en dehors: Considérations anatomiques
Bonnet, Pierre ULg; Waltregny, David ULg; de Leval, Jean ULg

in Progrès en Urologie (2003), 13(5)(Suppl.), 22

Detailed reference viewed: 8 (4 ULg)
Full Text
Peer Reviewed
See detailEmplacement of the Lyngdal granodiorite (SW Norway) at the brittle-ductile transition in a hot crust
Bogaerts, Michel; Scaillet, Bruno; Vander Auwera, Jacqueline ULg

in Geophysical Research Abstracts (2003), 5

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailPregnancy-associated glycoprotein concentrations in plasma and milk samples for early pregnancy diagnosis in Lacaune dairy sheep.
El Amiri, B.; Cognié, Y.; Sulon, J. et al

in Reproduction in Domestic Animals (2003), 38(4), 322

Detailed reference viewed: 7 (0 ULg)
See detailL'efficacité au prix de l'hétérogénéité : une approche comparative
Lafontaine, Dominique ULg

in Actes du colloque organisé par le Conseil de l'Education et de la Formation (2003)

Detailed reference viewed: 2 (0 ULg)
Full Text
See detailL’Histoire par allusion
Denis, Benoît ULg

in Traces. Travaux du Centre d'Études Georges Simenon (2003), (14), 95-109

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailHygro-thermal application conditions and adhesion
Courard, Luc ULg; Darimont, Anne ULg; Degeimbre, Robert ULg et al

in Seidler, Peter (Ed.) Industrial Floors 03 (2003)

Coatings are designed to protect concrete against environmental aggression. Water is one of the aggressive parameters able to deteriorate the concrete structure. The objectives of this paper are to ... [more ▼]

Coatings are designed to protect concrete against environmental aggression. Water is one of the aggressive parameters able to deteriorate the concrete structure. The objectives of this paper are to present the effects of water (i) during application of coating on the concrete substrate and (ii) pull-off test. Semi-permanent moisty state produced by absorption from the uncoated face, total immersion or diffusion of water from the back face of the substrate are analysed. Water vapour diffusion and influence of hydrophobic treatment are also investigated. A classification based on increasing influence of the tests and application conditions on adhesion is proposed and clearly points out the negative effect of capillary action from the uncoated face. [less ▲]

Detailed reference viewed: 12 (0 ULg)