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See detailLe froment d'hiver
Couvreur, Luc; Vancutsem, Françoise ULg; Bodson, Bernard ULg et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2004, September 09)

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See detailThe Oka varicella vaccines are more equal than different
Rentier, Bernard ULg; Gershon, Anne A.

in Vaccine (2004), 22(25-26), 3225-3226

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See detailSolar Concentration
Collette, Jean-Paul ULg; Defise, Jean-Marc ULg; Habraken, Serge ULg

Patent (2004)

We propose a solar concentrator based on a combination of Fresnel lens and reflectors. This architecture allows for a better light distribution and a thinner lighweight concentrator.

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See detailThe Polarization Evolution of the Optical Afterglow of GRB 030329
Greiner, J.; Klose, S.; Reinsch, K. et al

in GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY (2004, September 01)

We report 31 polarimetric observations of the afterglow of GRB 030329 with high signal-to-noise and high sampling frequency. The data imply that the afterglow magnetic field has small coherence length and ... [more ▼]

We report 31 polarimetric observations of the afterglow of GRB 030329 with high signal-to-noise and high sampling frequency. The data imply that the afterglow magnetic field has small coherence length and is mostly random, probably generated by turbulence. [less ▲]

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See detailThe XMM-LSS survey. Survey design and first results
Pierre, Marguerite; Valtchanov, Ivan; Altieri, Bruno et al

in Journal of Cosmology and Astroparticle Physics [= JCAP] (2004), 09

The XMM Large Scale Structure survey (XMM-LSS) is a medium deep large area X-ray survey. Its goal is to extend large scale structure investigations attempted using ROSAT cluster samples to two redshift ... [more ▼]

The XMM Large Scale Structure survey (XMM-LSS) is a medium deep large area X-ray survey. Its goal is to extend large scale structure investigations attempted using ROSAT cluster samples to two redshift bins between 0<z<1 while maintaining the precision of earlier studies. Two main goals have constrained the survey design: the evolutionary study of the cluster cluster correlation function and of the cluster number density. The adopted observing configuration consists of an equatorial mosaic of 10 ks pointings, separated by 20^\prime and covering 8° à 8°, giving a pointsource sensitivity of {\sim } 5\times 10^{-15}~{\mathrm {erg~cm^{-2}~s^{-1}}} in the 0.5 2 keV band. This will yield more than 800 clusters of galaxies and a sample of X-ray AGN with a space density of about 300 deg[SUP]-2[/SUP]. We present the expected cosmological implications of the survey in the context of LgrCDM models and cluster evolution. We give an overview of the first observational results. The XMM-LSS survey is associated with several other major surveys, ranging from the UV to the radio wavebands, which will provide the necessary resources for X-ray source identification and further statistical studies. In particular, the associated CFHTLS weak lensing and AMiBA Sunyaev Zel'dovich surveys over the entire XMM-LSS area will provide for the first time a comprehensive study of the mass distribution and of cluster physics in the universe on scales of a few hundred Mpc. We describe the main characteristics of our wavelet-based X-ray pipeline and source identification procedures, including the classification of the cluster candidates by means of a photometric redshift analysis. This permits the selection of suitable targets for spectroscopic follow-up. We present preliminary results from the first 25 XMM-LSS pointings: X-ray source properties, optical counterparts, and highlights from the first Magellan and VLT/FORS2 spectroscopic runs as well as preliminary results from the NIR search for z>1 clusters. The results are promising and, so far, in accordance with our predictions. In particular: (1) we reproduce the logN logS distribution for point sources obtained from deeper surveys at our sensitivity; (2) we find a cluster number density of 15 20 deg[SUP]-2[/SUP] (3) for the first time, we statistically sample the group mass regime at a redshift out to {\sim } 0.5 . Paper based on observations obtained with the XMM,CFH, ESO (Prg: P70. A-0283 .A-0733), VLA, CTIO and Las Campanas observatories. [less ▲]

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See detailL'astronomie dans le monde
Manfroid, Jean ULg

Article for general public (2004)

Cassini; Distance des Pléiades; Gaz très chaud au centre de notre Galaxie; FUSE; Peser une étoile froide; Masse d'une étoile; Naines brunes; Sursaut gamma dans la Galaxie; Trou noir record; Masse des ... [more ▼]

Cassini; Distance des Pléiades; Gaz très chaud au centre de notre Galaxie; FUSE; Peser une étoile froide; Masse d'une étoile; Naines brunes; Sursaut gamma dans la Galaxie; Trou noir record; Masse des neutrinos; Un satellite de notre Galaxie; Une jumelle de notre Galaxie; Vie sur Mars?; Rencontre intergalactique; Hawking change d'avis; Pollution lumineuse; Sursauts gamma; Le système solaire, une exception?; Babar et l'antimatière; Spicules; Tau Ceti; Anneau de poussières; Naissance d'une étoile; Vieilles galaxies [less ▲]

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See detailContributions to the development of a test-day model adjusted to New Zealand dairy cattle
Vanderick, Sylvie ULg

Master's dissertation (2004)

A test-day model was developed in order to study the feasibility and the usefulness of a random regression test-day model based on dairy cattle data from New Zealand. (Co)variance components were ... [more ▼]

A test-day model was developed in order to study the feasibility and the usefulness of a random regression test-day model based on dairy cattle data from New Zealand. (Co)variance components were estimated first within breeds then across breeds for Holstein-Friesian and Jersey animals. Results from single breed analysis showed that there are several differences between the two main breeds of dairy cattle in New Zealand. This was confirmed with the genetic correlations below one (r²= 0.926 for milk in first lactation) for breed specific additive genetic effects provided by the across breeds analysis. The specificity of the model used was first the capacity for taking account of these differences between breeds since more than one third of the dairy population are crossbred; and secondly the estimation of different breeding values considering each animal as a potential mate within each of the two breeds. From genetic evaluations, ranking changes in sires were observed by using the model with breed specific additive genetic effects and a model assuming the same breed composition for all animals. This first investigation showed the opportunity to carry on more research in the way to develop an accurate test-day model permitting to evaluate the crossbred dairy cattle of New Zealand and to perform an optimal selection of animals in function of the mating strategy to apply. [less ▲]

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See detailMulticenter evaluation of analytical performance of the Liaison((R)) troponin I assay
Pagani, F.; Stefini, F.; Chapelle, Jean-Paul ULg et al

in Clinical Biochemistry (2004), 37(9), 750-757

Objectives: This study evaluated the analytical characteristics of the Liaison(R) immunoassay for cardiac troponin I (cTnI). Design and methods: The protocol consisted of eight sections: evaluation of ... [more ▼]

Objectives: This study evaluated the analytical characteristics of the Liaison(R) immunoassay for cardiac troponin I (cTnI). Design and methods: The protocol consisted of eight sections: evaluation of antibody specificity, linearity, detection limit and imprecision, method comparison, evaluation of endogenous interferents, anticoagulant interference, sample stability, and reference values. Results: The assay equally measured free and complexed cTnI. The minimum detectable cTnI concentration was 0.021 mug/l. The cTnI concentration corresponding to a total CVof 10% was 0.056 mug/l. Linearity of response was demonstrated along the entire dynamic range of the assay. Assay interferences were minimal. cTnI concentrations in serum and heparinized plasma were significantly different. Values in EDTA plasma were on average approximately 5% higher than in matched serum, but this difference was not significant. The 99th percentile cTnI value in healthy subjects was 0.036 mug/l. Conclusions: Being sensitive, specific, and precise, the Liaison(R) cTnI assay meets current requirements to aid in the diagnosis of myocardial necrosis. (C) 2004 The Canadian Society of Clinical Chemists. All rights reserved. [less ▲]

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See detailA guidance assistance method for precision sugar beet sowing using machine vision.
Leemans, Vincent ULg; Destain, Marie-France ULg

in Pr. Josse De Baerdemaeker (Ed.) AgEng 2004 Conference - Engineering the future - Book of abstracts (2004, September)

This paper presents a method for seed drill guidance by using machine vision

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See detailSeconde campagne de mesure des odeurs sur le CET "Cour-au-Bois" à Braine-le-Château Estimation des nuisances olfactives
Nicolas, Jacques ULg; Denne, Pierre; Otte, Benoît

Report (2004)

The study is made in the frame of a follow-up monitoring of all landfill sites in Wallonia, initiated by the Ministry of Environment and managed by ISSeP. The present report concerns a second campaign on ... [more ▼]

The study is made in the frame of a follow-up monitoring of all landfill sites in Wallonia, initiated by the Ministry of Environment and managed by ISSeP. The present report concerns a second campaign on the landfill site "Cour-au-Bois" at Braine-le-Château. The usual field inspection technique was applied together with a GC-MS analysis aiming at determining the chemical composition of the ambiant air around the tipping area. [less ▲]

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See detailEcologie de la loutre (Lutra lutra) et conservation de ses habitats riverains
Libois, Roland ULg

in Actes du 1er colloque international "gestion et préservation des ressoures en eau" (2004, September)

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See detailDynamique d'une population de martins pêcheurs (Alcedo atthis) en Belgique en liaison avec la gestion des cours d'eau.
Libois, Roland ULg

in Actes du 1er colloque international "gestion et préservation des ressoures en eau" (2004, September)

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See detailL'image du mois. Une masse mediastinale de decouverte fortuite
MEURISSE, Nicolas ULg; Marchettini, P.; radermecker, R.P et al

in Revue Médicale de Liège (2004), 59(9), 477-478

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See detailSocial security, retirement age and optimal income taxation
Cremer, H.; Lozachmeur, J. M.; Pestieau, Pierre ULg

in Journal of Public Economics (2004), 88(11), 2259-2281

It is often argued that implicit taxation on continued activity of elderly workers is responsible for the widely observed trend towards early retirement. In a world of laissez-faire or of first-best ... [more ▼]

It is often argued that implicit taxation on continued activity of elderly workers is responsible for the widely observed trend towards early retirement. In a world of laissez-faire or of first-best efficiency, there would be no such implicit taxation. The point of this paper is that, when first-best redistributive instruments are not available, because some variables are not observable, the optimal policy does imply a distortion of the retirement decision. Consequently, the inducement of early retirement may be part of the optimal tax-transfer policy. We consider a model in which individuals differ in their productivity and their capacity to work long and choose both their weekly labor supply and their age of retirement. We characterize the optimal non-linear tax-transfer that maximizes a utilitarian welfare function when weekly earnings and the length of active life are observable while individuals' productivity and health status are not observable. (C) 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailLe syndrome de Brugada
Richardy, M.; Melon, Pierre ULg; Waleffe, André ULg et al

in Revue Médicale de Liège (2004), 59(9), 509-12

The Brugada syndrome, a genetically transmitted disease according to an autosomal mode with a variable penetrance, is responsible for sudden death secondary to polymorphic ventricular tachycardia. The ... [more ▼]

The Brugada syndrome, a genetically transmitted disease according to an autosomal mode with a variable penetrance, is responsible for sudden death secondary to polymorphic ventricular tachycardia. The diagnosis is based on a typical electrocardiographical paturn that combines a right bundle branch block with ST elevation in the right precordial leads. In high risk patients, the automatic implantable defibrillator has the unique capability to protect against the occurrence of ventricular arrhythmias. [less ▲]

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See detailLes differentes voies d'abord de l'oreillette gauche
RADERMECKER, Marc ULg; Limet, Raymond ULg

in Revue Médicale de Liège (2004), 59(9), 504-8

The knowledge of the anatomy of the atria and interatrial septum permits different routes to approach the left atrioventricular valve. The Waterston's or Sondegaard's groove approach is the most ... [more ▼]

The knowledge of the anatomy of the atria and interatrial septum permits different routes to approach the left atrioventricular valve. The Waterston's or Sondegaard's groove approach is the most frequently used, but other approaches such as Dubost'transseptal technique, vertical transseptal approach (Berreklouw-Guiraudon), biatrial inferior transseptal approach (Couetil) or Saksena's approach may be relevant in special situations. It is the purpose of this article to review the anatomic and technical basis of these different approaches and their respective merits. [less ▲]

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See detailArchitecture et minimum : quel degré zéro ?
Dawans, Stéphane ULg

in Intervalles (2004), 1

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See detailIntrinsic and irradiation-induced tumor selectivity of liposome-based gene therapy targeting Akt activation.
Martinive, Philippe ULg; Sonveaux, Pierre; Brouet, Agnes et al

Poster (2004, September)

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See detailL'innovation en matière d'alimentation fonctionnelle: le cas des oméga 3
Kouembeu Tagne, Jean Jacques ULg

Master of advanced studies dissertation (2004)

Comment avoir un aperçu général et spécifique tant sur les aliments fonctionnels que sur les oméga 3 ? Comment s'est opérée l'innovation en la matière? pour répondre à ces interrogations, j'ai essayé de ... [more ▼]

Comment avoir un aperçu général et spécifique tant sur les aliments fonctionnels que sur les oméga 3 ? Comment s'est opérée l'innovation en la matière? pour répondre à ces interrogations, j'ai essayé de répondre à quatre questions : le rôle des intermédiaires, le rôle de la crise de l’agro-alimentaire, les enjeux économiques qui entourent ces questions et la dimension internationale du problème. [less ▲]

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