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See detailÉtude fréquentielle de données via la transformée en ondelette : application aux cycles climatiques
Mabille, Georges ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg et al

in Bulletin de la Société Géographique de Liège (2012), 58

Understanding the climate requires a complex study of time series connected to weather parameters. The climatologist frequently applies signal processing tools and often uses the harmonic analysis and the ... [more ▼]

Understanding the climate requires a complex study of time series connected to weather parameters. The climatologist frequently applies signal processing tools and often uses the harmonic analysis and the Fourier transform. This article is dedicated to the description of a new tool, elaborated by mathematicians, which completes the outfit of intruments intended for signal analysis. The scale spectrum, which synthetizes a part of the information supplied by the wavelet transform, possesses the property to reveal pseudo-cycles which evolves around an average period. When applied to air surface temperature time series obtained from more than one hundred weather stations, to reanalysis data and to climatic indices which characterize the tropospheric flows, the wavelet transforms and the scale spectra reveal cycles with periods close to 30 months and 42 months. The Solar parameters analysis also leads to the existence of pseudo-cycles with frequencies corresponding to those found in the temperature time series and climatic indices. [less ▲]

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See detailEtude génétique de l'intelligence manipulatoire chez des enfants africains à l'aide des dispositifs de Rey
Richelle, Marc ULg

in International Journal of Psychology (1966), 1(4), 273-287

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See detailEtude génétique de la distance de dispersion du tali (Erythrophleum suaveolens (Guill& Perr.) Brenan) en forêt dense humide tropicale
Gillet, Pauline ULg

Master's dissertation (2012)

The study of the regeneration of tropical timber species is intended to design appropriate conservation strategies and to enable the sustainable exploitation of their populations. This study based on ... [more ▼]

The study of the regeneration of tropical timber species is intended to design appropriate conservation strategies and to enable the sustainable exploitation of their populations. This study based on sample collection made in Cameroon and Gabon in two forest contexts with different population densities, has allowed us to characterize gene flow from tali (Erythrophleum suaveolens) using molecular markers. Direct methods based on analyzes of kinship and proceeding by maximum likelihood, as well as indirect methods based on the heterogeneity of the pollen pool and on the spatial structure of the population, allowed the reconstruction of the events of seed and pollen dispersal. The results show that the species present an exponential distribution of pollen and seeds, the average distance of pollen dispersal would be 240 meters and that of seeds would be 135 meters. We also defined a minimum effective density of 0.09 to 0.2 individuals per hectare depending on the forest context studied. The tali has a rate of inbreeding of 25% to 30 % coupled with strong inbreeding depression. These two features are most likely to affect the regeneration of the species in case of overexploitation. [less ▲]

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See detailEtude génétique et anatomopathologique du syndrome de McCune-Albright chez l'adulte
Beckers, Albert ULg; Burlacu, Maria Cristina ULg; Thiry, Albert ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 345

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See detailEtude génétique et anatomopathologique du syndrome de McCune-Albright chez l'adulte
Beckers, Albert ULg; Burlacu, M.; Thiry, Albert ULg et al

in 27ème Congrès de la Société Française d'Endocrinologie - Deauville, 29 septembre - 2 octobre 2010 (2010, September)

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See detailEtude génétique Viola calaminaria (Dc) Lej. à l'aide de marqueur moléculaire du type RAPD
Bizoux, Jean-Philippe ULg

Master of advanced studies dissertation (2003)

Detailed reference viewed: 33 (4 ULg)