Description of Saturn’s auroral morphology during Cassini’s approach of the magnetosphere

Conference (2005, April 24)

Utilisation des IEC ou des sartans en pathologie

Conference (2005, April 21)

Feelings of justice at school: Results of a survey among 8th graders in Europe

Conference (2005, April 13)

Local assimilation of sea surface temperature and elevation in a two-way nested model of the Gulf of Lions, using a single multigrid state vector

Conference (2005, April)

A three fold nested model is built, covering (a) the Mediterranean Sea (resolution 1/4 degree) (b) its North-Western part (resolution 1/20 degree), and (c) the Gulf of Lions (resolution 1/100 degree). The ... [more ▼]

A three fold nested model is built, covering (a) the Mediterranean Sea (resolution 1/4 degree) (b) its North-Western part (resolution 1/20 degree), and (c) the Gulf of Lions (resolution 1/100 degree). The GHER hydrodynamic model (see e.g. [1]) is used for a simulation of the springs of 1997 and 1998. As the model allows mode splitting, the timestep in each grid is 3 seconds for the barotropic modes, and 3 minutes for the baroclinic modes. ECMWF atmospheric forcings and MODB4/MEDAR climatic data are used. This simulation is run with one-directionnal and bi-directionnal nesting (i.e. without and with statevector feedback), and results are compared. The output of the 1997 and 1998 simulations (3D temperature and salinity fields, and sea surface elevation field) are then used to build 3D multivariate EOFs over the 3 grids alltogether. This guarantees perfect correlations between points from different grids, that are physically at the same location. The following twin experiment is then set up. The simulation from 1998 serves as a control run. A delayed state of this run, serves as initial conditions for the perturbed run. The first 40 EOFs are used to build a reduced-rank model errorspace. Sea surface temperature and sea surface elevation from the reference run, physically located in the Gulf of Lions, are then assimilated in the perturbed run, using a reduced-rank optimal interpolation assimilation scheme. A previous experiment showed non-physical long-range corrections (far outside the Gulf of Lions); these corrections are removed by multiplying the corrections with a radial Gaussian function centered on the corresponding observations. The multivariate statevector ensures corrections are made to temperature, salinity and sea surface elevation fields. Using the corrected fields, the geostrophic equilibrium is used to calculate corrections to the velocity field. In this above twin experiment, observations are assimilated all at once in the 3 grids since a single statevector is used. The results are compared to classic approaches where each grid has a corresponding statevector, and observations are assimilated in a single grid (or in different grids separately). Finally, ongoing research about statistical predictors is presented. Indeed, primitive equation models are too costly to evolve the errorspace in time, even when reducedrank assimilation schemes are used. Statistical methods aim to replace the hydrodynamic model by a much faster method, that would then be used to evolve in time each of the directions of the errorspace, or alternately, the members of an ensemble method. Statistical methods need to be trained on real results; they are thus first tested on the model itself rather than on the errorspace. Preliminary results are presented. [less ▲]

The reconstruction of an Atlantic salmon population in the Belgian River Meuse basin. First success and new threats.

Conference (2005, April)

A 'Meuse Salmon' project aiming at restoring an Atlantic salmon run in the River Meuse basin was put forward in 1983 (after the discovery of several 'sea trout' in the Meuse near Liège) and started ... [more ▼]

A 'Meuse Salmon' project aiming at restoring an Atlantic salmon run in the River Meuse basin was put forward in 1983 (after the discovery of several 'sea trout' in the Meuse near Liège) and started officially in 1987 as a contribution of Wallonia to the European Year of Environment. In the course of this programme, most dams (3-8 m in height) obstructing the canalised River Meuse in Belgium and The Netherlands have been fitted with modern fish-ways in order to restore the free circulation of diadromous fish species. A second facet of the Salmon Meuse programme consisted in restocking salmonid streams in the Belgian Ardennes with hatchery reared salmon parr and smolt (maximum 200.000 fish per year) from foreign origins (Scotland, Ireland and France). Returning adult salmon have been scientifically recorded in the Meuse in The Netherlands (estuary and lower course) since 1994 but only since the year 2002 in Belgium: 13 (61-79 cm FL) fish in 2002 and 2 (71-76 cm FL) fish in 2003 caught mostly (13 fish) in a new big fish-pass at the Visé-Lixhe dam and (2 fish) in the River Berwinne, a small tributary of the Meuse known as the last spawning place for S. salar in Belgium in the 1920's. Female and male returning salmon in 2002 were successfully artificially reproduced in order to build a captive freshwater brood stock to be used for production of parrs and smolts of the new Meuse strain next autumn. The communication briefly reports on the progress of the program as concerns the salmon culture for stocking in Wallonia, the population dynamics of stocked parrs in nursery rivers, the patterns of upstream and downstream migration of salmon in the Belgian Meuse and its tributaries and the new challenges to meet (impact on salmon of rising water temperature, development of power generation, increasing predation on smolts by piscivorous birds). [less ▲]

A 12-year study of the upstream migration of Anguilla anguilla in a fish-pass in the river Meuse reveals a dramatic decline of the stock in Belgium.

Conference (2005, April)

From 1992 to 2004 upstream migrating eels were collected in a trap (0,5 cm mesh size) installed at the top of a small pool-type fish-pass at the Visé-Lixhe dam (built in 1980 for navigation purposes and ... [more ▼]

From 1992 to 2004 upstream migrating eels were collected in a trap (0,5 cm mesh size) installed at the top of a small pool-type fish-pass at the Visé-Lixhe dam (built in 1980 for navigation purposes and hydropower generation; height : 8,2 m; not equipped with a ship-lock) on the international River Meuse near the Dutch -Belgium border (290 km from the North Sea; width: 200 m; mean annual discharge: 238 m3/s; summer water temperature 21-26°C).The trap in the fish-pass was checked continuously (three times a week) over the migration period from March to September each year, except in 1994. We caught a total number of 32157 eels (biomass 1,955 kg) with a size from 14 cm to 85 cm and a mean value of 31,6 cm corresponding to yellow eels. The study based on a constant year-to-year sampling effort revealed a regular decrease of the annual catch from a maximun of 5613 fish in 1992 to a minimum of 423 in 2004. This demographic trend is fitted by the equation: number per year = 5.614 - 299 t, where t is time in years with 1992 as year 1. According to this model, the upstream migrating yellow eelstock in the Belgian Meuse should drop to near zero within the next ten years, as an expression of a collapsing recruitment of glass eels in the estuary in the Netherlands. In the discussion of these results, we examine the possible role of two other factors on the decrease over time of the number of yellow eels caught in the fish-pass. i) the effect of environmental variables (river discharge, water temperature and dissolved oxygen content) on the timing and intensity of upstream migration waves and ii) the existence and use of alternative migration routes. [less ▲]

Influence de la température du fluide de soufflage sur le bruit de fente

Conference (2005, April)

Les bouches de soufflage des systèmes de ventilation peuvent produire des sifflements de forte intensité. Pour étudier leur mécanisme de production un modèle expérimental où un jet rectangulaire heurte ... [more ▼]

Les bouches de soufflage des systèmes de ventilation peuvent produire des sifflements de forte intensité. Pour étudier leur mécanisme de production un modèle expérimental où un jet rectangulaire heurte une plaque fendue est étudié. Cette configuration donne naissance à un type de sons auto-entretenus connus sous le nom de bruit de fente. [less ▲]

Cellular and nervous environment of mouse mesenteric lymph node germinal centres

Conference (2005, April)

Le syndrome métabolique et le traitement antihypertenseur

Conference (2005, March 25)

The Missing Chapter in Janet Frame's 'Living in the Maniototo'

Conference (2005, March 23)

Aérogels, cryogels et xérogels de carbone: influence de la méthode de séchage sur les propriétés texturales des matériaux carbonés poreux

Conference (2005, March 22)

Prise en compte des contraintes liées aux bioprocédés pour la réalisation d'un système de régulation de bio-réacteur"

Conference (2005, March 16)

De la naissance de l'homme à l'humanisation de la naissance. La passion de la liberté dans la phénoménologie de Jean-Paul Sartre

Conference (2005, March 11)

Regards et réflexions critiques sur l’insécurité mise en scène auprès des personnes âgées

Conference (2005, March 03)

L’administration locale dans la société de l’information: d'une perspective diffusionniste à une approche basée sur la théorie de la traduction

Conference (2005, March)

Les administrations publiques développent ces dernières années plusieurs initiatives visant à améliorer leurs modes de gestion et à moderniser leurs relations avec la population, notamment par un recours ... [more ▼]

Les administrations publiques développent ces dernières années plusieurs initiatives visant à améliorer leurs modes de gestion et à moderniser leurs relations avec la population, notamment par un recours accru aux technologies de l'information et de la communication (TIC). Si des projets de e-administration sont progressivement mis sur pied par les collectivités locales, ils ne rencontrent toutefois encore qu’un succès relatif à l'heure actuelle. A partir de trois cas concrets, mis en œuvre dans des administrations communales belges, notre communication entend cerner le pourquoi d’une appropriation mitigée des projets de e-gouvernement ainsi que proposer, sur base de la sociologie de la traduction, des pistes de réflexion pour une meilleure conduite et une gestion optimalisée des projets de e-administration. [less ▲]

"Existe-t-il une littérature comique belge?"

Conference (2005, March)

Influence des cyclodextrines sur la vitesse de libération de la bétamethasone encapsulée sous forme de complexe dans des liposomes

Conference (2005, March)

L'opéré asthmatique

Conference (2005, March)

Symptomatic pituitary metastasis

Conference (2005, March)

Connexin 30 expression in high grade gliomas : correlation with survival and resistance to ionizing radiation.

Conference (2005, March)

Marine research at the Liège University: a long tradition of oceanography far away from the sea

Conference (2005, February 25)

MARE gathers 24 laboratories of the Faculties of Science, Applied Science, Law and Veterinary Medicine. It integrates complementary disciplines of Oceanology through both pluridisciplinary field works and ... [more ▼]

MARE gathers 24 laboratories of the Faculties of Science, Applied Science, Law and Veterinary Medicine. It integrates complementary disciplines of Oceanology through both pluridisciplinary field works and modeling. Major research themes of MARE are: 1) The detection and prediction of changes in coastal ecosystems integrating data collection, the development of statistical tools and 3D interdisciplinary models used conjointly with specific diagnostic tools tailored to management purposes; 2) The study of the CO2 dynamics in order to budget fluxes in major coastal areas and the Southern Ocean, through data collection, satellite imagery and modeling studies; 3) The dynamic and diversity of the Ocean Pelagic Ecosystem; 4) Biodiversity and taxonomic studies in different coastal and deep-sea areas; 5) Study of marine trophic webs using stable carbon and nitrogen isotopes; 6) Ecotoxicology and Ecophysiology: study of the effects of pollutants on marine organisms including marine mammals and investigations on genetic diversity, pathology and causes of death of marine mammals and seabirds; 7) Ecology of macrophytes systems and of benthic algae; 8) Sediments studies (e.g. sediment transport, sediment structure analysis, benthic habitats characterization and diversity); 9) Reconstruction of paleocirculations using isotope analysis (Nd, Pb); 10) Study of coastal evolution and management. This includes the study of coastal geomorphology using remote sensing data and coastal engineering. Moreover, MARE researchers have access to the research station STARESO in Corsica (http://www.stareso.com/), and to the Belgian R.V. Belgica, which operates in the North Sea and adjacent areas (http://www.mumm.ac.be/EN/Monitoring/Belgica/). Finally, the MARE centre supports the extant set of second and third cycle Teachings (master in Oceanography; http://www.ulg.ac/oceanbio/, DEA in Oceanology, European DEA in Marine Environment Modeling) - unique in the French-speaking Community of Belgium -, of a Doctoral School, and of international Conferences and Colloquia (The International Liège Colloquium on Ocean Dynamics and associated Symposia). [less ▲]

La constitution sémantique de l’ontologie fondamentale

Conference (2005, February 18)

En m'appuyant sur la critique du néokantien Rudolf Zocher, j'étudie ici la dimension sémantique constitutive du projet heideggérien d'ontologie fondamentale: la question heideggérienne n'est pas la ... [more ▼]

En m'appuyant sur la critique du néokantien Rudolf Zocher, j'étudie ici la dimension sémantique constitutive du projet heideggérien d'ontologie fondamentale: la question heideggérienne n'est pas la question de l'être, mais la question du sens de l'être. [less ▲]

Why does the red algal plastid lineage lack plastocyanin?

Conference (2005, February 03)

Enjeux et stratégies d'action en matière d'intégration des personnes migrantes au travail: une analyse comparative Belgique-Québec

Conference (2005, February)

Perinatal Group B Streptococcal infections

Conference (2005, February)

Physiologie de la Reproduction des nouveaux animaux de compagnie (NAC) : rat, souris, hamster, lapin, gerbille, furet, cobaye, chinchilla, écureuil de Corée

Conference (2005, January 27)

Le bien-être et l'éthique au coeur de la relation homme-animal. Contribution de la biologie moléculaire au progrès de l'élevage.

Conference (2005, January 26)

Professionnels de la réflexivité et transformations de l’action publique

Conference (2005, January 22)

Traitement de l'hypertension : les nouvelles directives

Conference (2005, January 20)

Interculturalité et éducation bilingue au Burkina Faso

Conference (2005, January)

Vocal fold structure and voice pathology

Conference (2005)

The Middle-Devonian proto-ovule Runcaria heinzelinii Stockmans 1968

Conference (2005)

Finite element computations of hydro mechanical coupled problem using a local second gradient model

Conference (2005)

On the numerical modelling of shear banding around an excavation

Conference (2005)

Valorisation des produits du terroir : expérience de la Région wallonne de Belgique

Conference (2005)

Can existing landscape ecology theories contribute to urbanisation issues and concomitant ecosystem management?

Conference (2005)

Headache cases

Conference (2005)

Application of space-time adaptive processing (STAP) to conformal arrays

Conference (2005)

Factors affecting black grouse numbers : an overview of the part of predators.

Conference (2005)

Excessive alcohol consumption, socio-professional statute and follow-up in general medicine

Conference (2005)

Fast 2D model-to-image registration using vanishing points for sports video analysis

Conference (2005)

Multimodal analysis of sleep physiological signals: application to sleep disordered breathing screening ambulatory device

Conference (2005)

A Modular Multi-camera Framework for Team Sport Tracking

Conference (2005)

Les répercussions des hospitalisations psychiatriques sur l'accès aux soins de première ligne

Conference (2005)

L’importance de la transdisciplinarité pour la recherche et pour l’enseignement des sciences.

Conference (2005)

Array Interpolation Applied to Conformal Array STAP

Conference (2005)

Derivation of high-resolution ocean surface fields for regional and coastal models

Conference (2005)

Coastal ocean circulation models need high-resolution input fields, such as winds, sea surface height and heat fluxes, to represent the variability of coastal systems. Atmosphere model outputs and ... [more ▼]

Coastal ocean circulation models need high-resolution input fields, such as winds, sea surface height and heat fluxes, to represent the variability of coastal systems. Atmosphere model outputs and satellite data are usually used. However, atmosphere models are usually too coarse and do not represent the high variability of coastal systems, and satellite data do not present a complete coverage, mainly due to cloudiness. In situ observations can accurately represent the complex temporal variability of coastal regions, but usually their spatial coverage is far from optimal. Several products derived from atmosphere models, satellite images and in situ observations are prepared to use as high-resolution input fields suitable for coastal models. An optimally interpolated (OI) wind field has been realized by merging atmosphere model winds, satellite-derived winds (from quikSCAT) and in situ buoy measurements. Other fields, such as geostrophic currents, are derived from Sea Surface Height anomaly obtained from the Topex/Poseidon, Jason, ERS 1/2 and Envisat altimeter product of the CLS center, plus a MICOM mean dynamic topography. Sea Surface Temperature (SST) is also needed to correct surface heat fluxes, but satellite SST is often gappy due to clouds. Two different approaches are investigated in order to obtain complete fields, one using OI and the other using Empirical Orthogonal Functions (EOF) for the reconstruction of missing data. The EOF-based method can reconstruct different variables together, such as SST and surface chlorophyll, by using the correlation between them. This multi-variate approach is used here, and compared to the mono-variate OI product. [less ▲]

Multisensor flight simulation with emphasis on synthesis of IR imagery

Conference (2005)

Littérature

Conference (2005)

Physiological and physico-chemical factors modulating ISR elicitor production by Pseudomonas putida.

Conference (2005)