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See detailCoronary heart disease: the MONICA-BELLUX Register
JeanJean, Michel; Krzesinski, Jean-Marie ULg; Wunsch, Guillaume

Conference (2012, December 05)

Background : Cardiovascular diseases contribute to 42% of overall mortality in the European Union. Over a third of deaths from CVD are from coronary heart disease and just over a quarter are from ... [more ▼]

Background : Cardiovascular diseases contribute to 42% of overall mortality in the European Union. Over a third of deaths from CVD are from coronary heart disease and just over a quarter are from cerebrovascular disease (stroke). Standardized death rates for heart disease have fallen dramatically in the last 25 years in Western Europe, both for men and for women. Multinational MONItoring of trends and determinants in CArdiovascular disease The MONICA Project : A major source of information on cardiovascular diseases established in the early 1980s under the auspices of WHO, to monitor trends in cardiovascular diseases and to relate these to risk factor changes over a ten year period. There were a total of 37 MONICA Collaborating Centres in 21 countries (including 29 populations in 16 European countries). The ten year data collection was completed in the late 1990s, though several Centres are still active today. Conclusions : CVD registers remain nevertheless an invaluable source for monitoring levels and trends in incidence and case fatality. Trends in incidence rates and in case fatality rates can significantly differ from one another. This situation requires better detection of individuals at risk. The intervention component of the BELLUX register is well-suited for this task. [less ▲]

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See detailDurabilité de lots de bois de peuplier modifié thermiquement
Jourez, Benoît ULg; Verheyen, Cécile

Conference (2012, December 05)

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See detailBiolixiviation de la carrolite-Application aux minerais polymétalliques de l'Arc Cuprifère du Katanga (cas de minerais de la mine de Kamoya, Kambove) en RDC
Nkulu Wa Ngoie, Guy ULg

Doctoral thesis (2012)

The present work focuses on the bioleaching of carrolite as pure mineral and application of bioleaching as an alternative technique for processing the polymetallic sulphide ores in Katanga copperbelt ... [more ▼]

The present work focuses on the bioleaching of carrolite as pure mineral and application of bioleaching as an alternative technique for processing the polymetallic sulphide ores in Katanga copperbelt (case of Kamoya deposit ores) in Democratic Republic of Congo (DRC). A preliminary study on the bioleaching of carrolite in the presence of mesophilic bacteria has highlighted the effect of the initial pH (pH = 1.5, 2.0 and 2.5), particle size (-53μm, -75+53 µm, -106+75µm), the pulp density (dp= 2.5 and 10) on the pH, the solution redox and on the dissolution performance of copper, nickel and cobalt. The results obtained at this stage showed that the initial pH, particle size and pulp density greatly influences the process of bioleaching of carrolite. The evolution of pH, solution redox and the efficiency of metals dissolution with time considering these factors indicate the importance of bacterial growth. Good bacterial activity thereby yields high metal dissolution which is being obtained at initial pH 2.0, particle size of -53μm and 2% pulp density. A second study upon the bioleaching of carrolite has allowed highlighting the metal dissolution mechanism during the bioleaching process. The evolution of the bacterial population, observations of Optical Microscope (MO), Scanning Electron Microscope (SEM), Confocal Laser Scanning Microscope (CLSM) of carrolite grains during bioleaching and spectroscopical analysis in X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) of bioleaching residues allowed us to demonstrate the role and importance of bacteria attached on the surface of carrolite grains from one hand, and ferric ions on the other hand, during the carrolite bioleaching. Strong adhesion of bacteria to the surface of the carrolite grains was observed during early bioleach stages and playing an important role in the process. This phenomenon would cause the release of ferrous ions in solution by a direct contact mechanism on the one hand and causing oxidation of ferrous ions, elemental sulfur or sulfur compounds on the other hand, compounds which would accumulate at the surface of carrolite grains. The number of free bacteria in solution increases thus promoting the oxidation of ferrous to ferric ions, which oxidize the mineral through indirect mechanism. The number of free bacteria in solution and that of attached bacteria became constant over time, suggesting a cooperative mechanism of carrolite bioleaching. Finally, a statistical study of bioleaching of polymetallic concentrate from Kamoya deposit by Taguchi methodology and analysis of variance (ANOVA) was used to investigate the effect of different physicochemical parameters (initial pH, temperature, agitation, pulp density and duration of bioleaching) on the process efficiency. The results obtained from this statistical approach showed the possibility of bioleaching application as an alternative technique for treatment of the polymetallic sulphide ores of the Katanga copperbelt in Democratic Republic of Congo (DRC) but further investigation using thermophilic bacteria should be considered to improve metal dissolution. [less ▲]

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See detailContesting Frames in Public Health
Hendrickx, Kim ULg

Scientific conference (2012, December 05)

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See detailGround-based remote sensing of tropospheric water vapour isotopologues within the project MUSICA
Schneider, M.; Barthlott, S.; Hase, F. et al

in Atmospheric Measurement Techniques (2012), 5(2012), 3007-3027

Within the project MUSICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water), long-term tropospheric water vapour isotopologue data records are provided for ... [more ▼]

Within the project MUSICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water), long-term tropospheric water vapour isotopologue data records are provided for ten globally distributed ground-based mid-infrared remote sensing stations of the NDACC (Network for the Detection of Atmospheric Composition Change). We present a new method allowing for an extensive and straightforward characterisation of the complex nature of such isotopologue remote sensing datasets. We demonstrate that the MUSICA humidity profiles are representative for most of the troposphere with a vertical resolution ranging from about 2 km (in the lower troposphere) to 8 km (in the upper troposphere) and with an estimated precision of better than 10%. We find that the sensitivity with respect to the isotopologue composition is limited to the lower and middle troposphere, whereby we estimate a precision of about 30‰ for the ratio between the two isotopologues HD16O and H216O. The measurement noise, the applied atmospheric temperature profiles, the uncertainty in the spectral baseline, and the cross-dependence on humidity are the leading error sources. We introduce an a posteriori correction method of the cross-dependence on humidity, and we recommend applying it to isotopologue ratio remote sensing datasets in general. In addition, we present mid-infrared CO2 retrievals and use them for demonstrating the MUSICA network-wide data consistency. In order to indicate the potential of long-term isotopologue remote sensing data if provided with a well-documented quality, we present a climatology and compare it to simulations of an isotope incorporated AGCM (Atmospheric General Circulation Model). We identify differences in the multi-year mean and seasonal cycles that significantly exceed the estimated errors, thereby indicating deficits in the modeled atmospheric water cycle. [less ▲]

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See detailZinc hyperaccumulation: a model to examine metal homeostasis in plants
Hanikenne, Marc ULg

Scientific conference (2012, December 05)

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See detailInitiation à ArcGIS - Travaux pratiques sur les Systèmes d'Information Géographique - SIG
Denis, Antoine ULg

Learning material (2012)

Introduction to ArcGIS (GIS) manual for beginners with data

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See detailFuture surface mass balance contribution of the Antarctic ice-sheet to sea level rise
Agosta, Cécile ULg; Fettweis, Xavier ULg; Krinner, Gerhard et al

Scientific conference (2012, December 04)

Most of the IPCC-AR4 global circulation models predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. High-resolution modeling ... [more ▼]

Most of the IPCC-AR4 global circulation models predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. High-resolution modeling is necessary to adequately capture the Antarctic SMB, that is why we present here a downscaling method leading to 15-km SMB resolution for century time-scales over Antarctica. Our first results show that a higher resolution induce at the same time more run-off but a significantly higher mitigation of sea level rise for the next centuries. [less ▲]

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See detailREDI: budgets de référence pour une vie digne, une application web
Cornelis, Ilse; Peeters, Nele; Reynaert, Jean-François ULg et al

Report (2012)

En résumé, l’application web REDI permet d’utiliser un cadre de référence uniforme tout en calculant un budget adapté au bénéficiaire. En outre, cet outil peut être un guide pour obtenir un aperçu des ... [more ▼]

En résumé, l’application web REDI permet d’utiliser un cadre de référence uniforme tout en calculant un budget adapté au bénéficiaire. En outre, cet outil peut être un guide pour obtenir un aperçu des dépenses et revenus de la personne et a prouvé sa valeur éducative dans le cadre d’accompagnements individuels des clients. REDI peut contribuer à une plus grande prise de conscience sur le besoin d’uniformité existant au sein des CPAS auprès des assistants sociaux et des conseillers pour l’octroi de soutien financier supplémentaire. En outre, l’utilisation des budgets de référence contribue à ce que les assistants sociaux et conseillers comprennent mieux ce qui est nécessaire pour vivre dans la dignité, et participer pleinement à la vie en société. Espérons que sur le long terme, cela puisse modifier les politiques d’aide sociale et permettre une société plus inclusive. [less ▲]

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See detailIntroduction aux théories de la perception du paysage
Vranken, Isabelle ULg

Speech (2012)

La perception du paysage est abordée sous l'angle de l'école behavioriste, plus particulièrement les travaux de Kevin Lynch en urbanisme sur l'image de la ville. Elle part du postulat que la perception de ... [more ▼]

La perception du paysage est abordée sous l'angle de l'école behavioriste, plus particulièrement les travaux de Kevin Lynch en urbanisme sur l'image de la ville. Elle part du postulat que la perception de l'environnement influence le comportement de l'individu qui y vit (le citoyen)et modifie à son tour son environnement. Ceci sert à dégager des principes d'aménagement du territoire pour plus de bien-être. La voirie joue un rôle central dans la perception de la ville, étant donné que c'est le point d'observation principal de celle-ci par les citoyens. Selon sa forme, ses accès et ses abords, ou encore l'organisation de l'écran construit, différents effets d'ambiance urbaine peuvent être ménagés. Dans ce paysage s'implantent les éléments principaux de la structure de la ville: limites, voies, noeuds, points de repère, quartiers. Leur organisation relative fait émerger les caractéristiques globales de la ville que sont la lisibilité et l'imagibilité. Ces techniques ont été utilisées et adaptées pour l'analyse de la ville de Lubumbashi et de l'Avenue Louise à Bruxelles. [less ▲]

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See detailLiquidity Shocks and Global Imbalances
Artige, Lionel ULg

Conference (2012, December 04)

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See detailENMG et expertise
WANG, François-Charles ULg

Conference (2012, December 04)

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See detailRelationship between milk composition estimated from mid infrared and methane emissions in dairy cows
Kandel, Purna Bhadra ULg; Vanlierde, Amélie ULg; Dehareng, F et al

Scientific conference (2012, December 03)

N/A

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See detailSurvival analysis: finding relevant epistatic SNP pairs using Model- Based Multifactor Dimensionality Reduction
Van Lishout, François ULg; Vens, Céline; Urrea, Victor et al

Conference (2012, December 03)

Analyzing the combined effects of genes (and/or environmental factors) on the development of complex diseases is quite challenging, both from the statistical and computational perspective, even using a ... [more ▼]

Analyzing the combined effects of genes (and/or environmental factors) on the development of complex diseases is quite challenging, both from the statistical and computational perspective, even using a relatively small number of genetic and non-genetic exposures. Several data-mining methods have been proposed for interaction analysis, among them, the Multifactor Dimensionality Reduction Method (MDR). Model-Based Multifactor Dimensionality Reduction (MB-MDR), a relatively new dimensionality reduction technique, is able to unify the best of both nonparametric and parametric worlds, and has proven its utility in a variety of theoretical and practical settings. Until now, MB-MDR software has only accommodated traits that are measured on a binary or interval scale. Time-to-event data could therefore not be analyzed with the MB-MDR methodology. MB-MDR-3.0.0 overcomes this shortcoming of earlier versions. We show the added value of MB-MDR for censored traits by comparing the implemented strategies with more classical methods such as those based on a parametric regression paradigm. The simulation results are supplemented with an application to real-life data. [less ▲]

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