Using natural radiocarbon to assess the effects of numerics on biological tracers

Conference (1999, July)

Between the Valorisation of Individualism and the Need for a Welfare State: Opinions of Québécois, Ontarian and French Students

Conference (1999, July)

Multivariate analyses like hierarchical ascending classification allows us not only to simplify information collected with complex series of questions, but in a more significant way, to stress the ... [more ▼]

Multivariate analyses like hierarchical ascending classification allows us not only to simplify information collected with complex series of questions, but in a more significant way, to stress the plurality of behaviours and cognition in a given population. Our analysis of the results of a 1996 survey on distributive justice and the role of the state show us, on the one hand, that French students seem to give a more important role to the state in society and economy than their Quebec counterparts, and even more than Ontario students. However, many aspects may be hidden by this overall picture. In fact, considering the students who responded to our survey in 1996, different patterns become apparent when we consider profiles of answers based on opinions about equality among citizens, individualistic orientations, solidarity and services the state should provide. This more precise picture allows us to suggest that even a context of economic and financial constraints which could justify attacks on the welfare state does not necessarily engender homogeneous and foreseeable attitudes among students. [less ▲]

La participation et lʼintérêt politiques chez les élèves de 4e et 5e secondaire dans la région de Québec : comparaisons de données recueillies en 1990 et en 1998

Conference (1999, June 06)

En 1990 et en 1998, nous avons eu l’occasion de distribuer un questionnaire à plus de 800 élèves de sept écoles secondaires de la région de Québec dans le but, entre autres, de déterminer leurs niveaux ... [more ▼]

En 1990 et en 1998, nous avons eu l’occasion de distribuer un questionnaire à plus de 800 élèves de sept écoles secondaires de la région de Québec dans le but, entre autres, de déterminer leurs niveaux d’intérêt pour la politique et de participation aux associations. La comparaison de données, à une dizaine d’années d’intervalle, s’avère instructive. Plus précisément, nos résultats sont analysés à l’aide d’une méthode multidimensionnelle, la classification ascendante hiérarchique, qui nous permet de regrouper les répondants en fonction des similitudes d’un profil de réponses. Ainsi, bien que nos enquêtes, en 1990 comme en 1998, révèlent qu’environ les deux tiers des élèves participent aux activités d’une ou de plusieurs associations de nature très diverse, le fait de considérer simultanément plusieurs dimensions de la participation nuance ce portrait pour le politologue. Il en résulte que plusieurs types d’attitudes et de comportements apparaissent au sein de notre population. Il convient de les garder à l’esprit autant ces types variés que cette projection globale qui nous amène à noter qu’environ le quart de nos répondants peuvent être identifiés comme des élèves participants à des mouvements de nature politique ou de « revendication » et fortement disposés à s’engager. [less ▲]

Mobilité résidentielle et diffusion périurbaine : le bonheur serait donc dans le pré…

Conference (1999, June 01)

Late Quaternary Relative Sea-level variations on the East Coast of North America from Nova Scotia to South Carolina and Bermuda.

Conference (1999, June)

Comorbidité du trouble panique chez les hyperventilants chroniques : implications pour la clinique : 5èmes Journées Scientifiques de l'AFFORTHEC, Lyon, 27-29 mai 1999

Conference (1999, May 28)

Prévention primaire, maladies sexuellement transmisibles et SIDA : intervention comportementale chez des adolescents brésiliens : 5èmes Journées Scientifiques de l'Association Francophone de Formation et de Recherche en Thérapie Comportementale et Cognitive (AFFORTHEC), Lyon, 27-29 mai 1999

Conference (1999, May 27)

Impulser, accompagner, coordonner : une formation européenne à l'encadrement des professionnels de la petite enfance

Conference (1999, May 19)

A multidimensional tool for measuring job control: evidence about the construct validity

Conference (1999, May 15)

Prévention des infections périnatales à streptocoques du groupe B.

Conference (1999, May 08)

Intervention de la mémoire à long terme dans des tâches de mémoire de travail

Conference (1999, May)

Coupled modelling of global ocean circulation and carbon cycle

Conference (1999, May)

Etude des processus inhibiteurs au moyen de l'épreuve de Hayling

Conference (1999, May)

Effects of dolomite lime and clearcut on nitrate leaching from acid forest soils

Conference (1999, May)

Forest liming has received increased attention since the 1980s, when unusual needle yellowing and fall were observed in large parts of Europe and North America. This ‘new forest decline’ has been ... [more ▼]

Forest liming has received increased attention since the 1980s, when unusual needle yellowing and fall were observed in large parts of Europe and North America. This ‘new forest decline’ has been attributed to several causes acting individually or in synergy, amongst which were 'acid rain', nitrogen saturation and nutritional imbalances. Liming at moderate doses was suggested as a counteracting measure against soil acidification and to remove nutritional deficiencies. Another major forest management operation is whole tree harvesting. Both liming and clearcut may however affect the water quality leaving the treated areas. In particular, nitrate leaching is of major concern, as nitrate leaching may be linked to soil acidification, associated cation and/or aluminium release, and nitrate contamination of surface and groundwater. In this paper, I summarise main results of studies performed in the Belgian Ardennes. In this area, the acid brown soils are naturally poor in magnesium and the observed forest dieback symptoms were supposed to be the consequence of increased pollution exacerbating magnesium deficiency. Liming was suggested for prevention and correction. However, possible side effects, in particular on soil solution and stream water chemistry needed to be evaluated. Another major concern was the effects of clearcut operations on the streamwater quality in this area important for drinking water collection. The effects of dolomite lime were investigated at the watershed, plot and laboratory level. Paired watersheds of approximately 80 ha were mainly covered with Picea abies. One watershed of each pair was limed with 3 T/ha of fine ground dolomite and 200 kg/ha K2SO4. Runoff chemistry was analysed for major cations and anions and time series intervention analysis was used to detect statistically significant changes in stream water chemistry. Results showed increased magnesium concentrations immediately after liming, but a major part of the lime was retained by the soil system, and consequences on water chemistry were minor. However, in the plot study, where 5 T ha-1 of a dolomite lime suspension were applied to adjacent Quercus petraea and Picea abies stands, soil solution nitrate concentrations were significantly increased through liming in the Quercus plots. Increased net nitrification in the Quercus stand was confirmed by potential net nitrification measurements in the laboratory. The effects of tree harvesting on streamwater ion concentrations were investigated by clear felling 22 ha (9650 m3 wood) of a 81 ha watershed. This area represented one third of the forested area, the remaining area being covered equally with young plantations and 70-100 year old Picea abies. First data indicate increased potassium, iron, lead and organic carbon concentrations, but no major change in streamwater nitrate concentrations. Results will be discussed in relation to literature data and known controlling factors of the nitrification process. This analysis reveals that the speed, extent and duration of a perturbation in nitrate leaching after liming or felling vary at different sites. Risks assessment for nitrate leaching is therefore difficult and prediction of nitrate leaching in response to a perturbation remains an important challenge for further studies. In particular, basic controls of the nitrification process and relation nitrification/immobilisation need further investigation. [less ▲]

La châsse de saint Remacle à Stavelot et les reliquaires aixois

Conference (1999, April 23)

Distortion-Invariant FOPEN Detection Filter Improvements

Conference (1999, April)

Deep structure of Southern Tian Shan (China) and its neotectonic expression

Conference (1999, April)

Streptocoques du groupe B: culture et recherche rapide d'antigène

Conference (1999, March 26)

Surgical aspects of spine and spinal cord injury

Conference (1999, March 24)

Cytokines et nouveaux marqueurs inflammatoires

Conference (1999, March 13)

An Open Problem of MCDA: Aid to the Conception of the Building Envelope

Conference (1999, March)

In the conception of the envelope of a building, the sketch design is a crucial moment of the design. The first drawing gives a concrete expression to the first choices of the project author, in respect ... [more ▼]

In the conception of the envelope of a building, the sketch design is a crucial moment of the design. The first drawing gives a concrete expression to the first choices of the project author, in respect of a set of requirements and of general preferences, expressed by the multiple stakeholders of the project, namely: the building owner, the users, the administrative authorities and the design team surrounding the architect. In order to help the stakeholders in improving this stage of the sketch design, the present study explores a multicriteria decision aiding procedure. This MultiCriteria Decision Aid (MCDA) methodology should be close to the usual design process. This paper presents the design aid procedures, in parallel. At this time of the study, the decision aid process is a first attempt to cope with this architectural design challenge. The floor is expected to react to the suggested presentation of this MCDA open problem. [less ▲]

Rééducation logopédique des dysphonies dysfonctionnelles.

Conference (1999, February 26)

La formation documentaire en Belgique

Conference (1999, February 19)

Role of Heat Shock Proteins (HSP27 and HSP70) in ischemic protection and neuronal plasticity

Conference (1999, January 27)

Hybridations dans le film d’animation

Conference (1999, January 11)

Physiopathologie et performances de reproduction : une approche terminologique

Conference (1999, January)

Electron spin resonance study of basteriochlorin a incorporation into membranes models

Conference (1999)

Electron spin resonance study of basteriochlorin a incorporation into membranes models

Conference (1999)

Place des parents dans les services de médecine foetale et de néonatalogie: de l'idéal à la réalité

Conference (1999)

Foetus et nouveau-né: deux poids, deux mesures

Conference (1999)

Inulin incorporation in the weaning piglet diet as alternative to growth promoters.

Conference (1999)

Increased expression of bone sialoprotein in skeletal metastases compared with non skeletal metastases from human breast and prostate cancers

Conference (1999)

Increase of the bacteriochlorin a photosensitizing efficiency by incorporation in liposomes

Conference (1999)

Des tenues de palabre à la gestion en partenariat : place et rôle potentiel de l'exploitation forestière dans la gestion des ressources naturelles

Conference (1999)

Avec l’avancement des recherches sur la gestion des ressources forestières, avec la mise en application des dispositions prévues par la nouvelle loi forestière, il est de plus en plus évident que les ... [more ▼]

Avec l’avancement des recherches sur la gestion des ressources forestières, avec la mise en application des dispositions prévues par la nouvelle loi forestière, il est de plus en plus évident que les impératifs de gestion durable vont conduire à une synthèse entre les domaines forestiers dits permanent, qui vont être classés en UFA, et ceux dits non permanents ou agro-forestiers, réservés entre autre aux populations forestières, mais également à d’autres activités concurrentes (Ventes de coupes, récupérations). Dans cette intervention, nous discutons l’attitude et le rôle de l’exploitant forestier face à l’impact de ses activités et vis-à-vis des questions de gestion durable des ressources naturelles comme la faune. Des indicateurs permettent d’évaluer l’usage actuel de la faune, que ce soit par les villageois ou les employés des exploitations forestières, au sein de ce qu’il convient d’appeler la filière viande de brousse. Les prélèvements actuels sont conséquent et non durables dans bien des cas, ce qui soulève la question des alternatives et de la gestion de la chasse. Malgré tout, il semble illusoire de vouloir arrêter à court terme l’usage actuel de la faune au risque de se trouver confronté à des explosions sociales, principalement au niveau des chantiers d’exploitation forestière mais ailleurs également. L’étude des maîtrises développées chez différent peuples d’essarteurs nous montre qu’il n’est pas possible de préjuger d’un quelconque modèle de gestion de la faune par les populations locales et donc qu’une gestion essentiellement villageoise ne semble pas en mesure de donner les résultats escomptés en terme de durabilité. Ce constat nous conduit à proposer de repenser des actions à mener, en terme de développement ou de conservation. Les aires protégées ont un rôle très important à jouer, tant qu’une gestion effective des aires non protégées n’a pas vu le jour. Aborder ces questions amène à s’interroger sur les échelles d’interventions. Nous analysons un exemple de conflit lors de l’exploitation de la licence 1818 par l’entreprise R. Pallisco qui montre cette fois l’importance de la prise en compte des maîtrises foncières. Ces différents points nous amènent à évoquer l’évolution dans la responsabilités de chacun des acteurs et à la possibilité d’un l’élargissement du rôle de l’exploitant forestier, dont l’efficacité est connu, et qui d’instrument de désenclavement pourrait devenir un instrument de gestion et de protection de la biodiversité sur les vastes espaces qui lui sont alloués. Cette contribution peut se réaliser dans le cadre d’un partenariat avec une assistance technique qui met à disposition des l’exploitants forestiers les capacités scientifiques de suivi et de gestion des ressources comme la faune. Cette intégration permettrait une approche plus globale des questions de conservation et de développement sous la responsabilité d’une structure indépendante de contrôle dont le pilotage serait assuré en partie par l’administration. [less ▲]

The role of bone sialoprotein in bone metastasis

Conference (1999)

Steel Structures in Fire. From the Material Level to the Calculation Methods

Conference (1999)

Uncertainties in spatial decision, a policy-maker point of view

Conference (1999)

A strategy for a sustainable protection and restoration of endangered-vulnerable riverine fish populations. The barbel (Barbus barbus) case study in Belgium.

Conference (1999)

Anti-inflammatory properties of capsular polymers from blue-green algae.

Conference (1999)

Development of PCR-ELOSA for monitoring Debaryomyces hansenii (strain O), antagonistic of postharvest diseases on apples

Conference (1999)

Isolation of Microsporum canis from asymptomatic cats can reflect passive mechanical carriage or true subclinical infection

Conference (1999)

Contribution de l'étude électromyographique para-vertébrale dans le cadre des radiculopathies lombo-sacrées

Conference (1999)

A spectroscopic study inside liposomes of propofol singlet oxygen quenching properties

Conference (1999)

Des chats comme porteurs de Microsporum canis : prévalence en Belgique

Conference (1999)

Writing Poetry in the Age of Prose

Conference (1999)

Le pharmacien d'officine face à l'interprétation des tests de biologie clinique

Conference (1999)

Le pharmacien d'officine face à l'interprétation des tests de biologie clinique

Conference (1999)

Ion beam figuring of precision aspheric optical surfaces

Conference (1999)

An ion beam figuring facility is fully operational at the Centre Spatial de Liège since 1997. Ion beam figuring principle is briefly reminded and the present capabilities of the technique are described ... [more ▼]

An ion beam figuring facility is fully operational at the Centre Spatial de Liège since 1997. Ion beam figuring principle is briefly reminded and the present capabilities of the technique are described. An extensive characterisation programme is running in order to determine the optimised parameters for numerous materials and operating conditions. In this frame, tests have been performed on various optics to demonstrate the capability of the technique to figure aspheric shapes on glass or metallic substrates. At first, an aspherisation on a spherical gold-coated aluminium mirror plated in between with Nickel is presented. After removal of the gold coating with the ion beam, micro-roughness and etching rate measurements have been performed on the substrate material. Finally, the mirror has been figured from the original sphere to a parabola. The surface characteristics evolution is described in terms of micro-roughness and surface error. Other examples of complex aspherical figuring (polynomials of high order, ...) are shown. In conclusion, the potential impact and the results of this technique on optics fabrication, especially for exotic shapes, are exposed. The integration of the ion beam figuring process in a classical optics manufacturing sequence will be discussed, identifying the potential time and money savings. [less ▲]

Examen échographique de l'appareil podotrochléaire.

Conference (1999)

Accréditation d'un laboratoire d'analyse: aspects réglementaires et pratiques

Conference (1999)