References of "2003"
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See detailStandardized test mixture for the characterization of comprehensive two-dimensional gas chromatography columns: the Phillips mix
Dimandja; Clouden; Colon et al

in Journal of Chromatography. A (2003), 1019

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See detailSylviculture et qualité du bois de l'épicéa en Région wallonne
Hebert, Jacques ULg; Herman, Marc; Jourez, Benoît ULg

in Forêt Wallonne (2003), 62

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See detailValidation of two homologous radioimmunoassays for measuring pregnancy-associated glycoprotein in ewes.
El Amiri, B.; Karen, A.; Sulon, J. et al

in Reproduction in Domestic Animals (2003), 38(4), 358

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See detailFrançois Schuiten, créateur sans frontière
Dejasse, Erwin ULg

Article for general public (2003)

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See detailThe Wife of Bath's Wanderinge by the Weye and Conduct Books for Women
Dor, Juliette ULg

in Harding, Wendy (Ed.) Drama Narrative and Poetry in the Canterbury Tales (2003)

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See detailSeismic triggering of landslides. Part B: Simulation of dynamic failure processes
Havenith, Hans-Balder ULg; Strom, A.; Calvetti, F. et al

in Natural Hazards & Earth System Sciences (2003), 3

From field observations it is possible to establish correlations between geological conditions and landslide occurrence. However, in general, it is difficult to assess the affect of individual factors on ... [more ▼]

From field observations it is possible to establish correlations between geological conditions and landslide occurrence. However, in general, it is difficult to assess the affect of individual factors on slope instability because of their mutual interaction. In addition, the dynamic effect of propagating seismic waves significantly increases the complexity of the slope stability problem. Wave diffraction, reflection and focusing effects are dependent on local geological conditions and make it difficult to analyse dynamic sliding mechanisms using field observations alone. As a consequence, in order to examine the influence of various geological and seismic factors on slope movements, it is often necessary to produce numerical models. This paper describes the results of such models as applied to two case studies in Kyrgyzstan: the Ananevo rockslide, located in granite, and the Suusamyr debris slump-flow, situated within soft sediments (see Part A: Havenith et al., 2003). Discrete element modelling (UDEC), adapted both to the discontinuous character of fractured rock and to the heterogeneity of layered mediums, was used. This permitted simulation of deformation mechanisms, including seismically induced bending, block tilting, and slip. Particular attention was paid to the interaction between deformation mechanisms, site-specific amplification effects, and subsurface structure. [less ▲]

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See detailEtude des modifications environnementales à partir des données pluviométriques et NDVI de NOAA-AVHRR en Afrique de l’Ouest
Hountondji, Yvon ULg; Ozer, Pierre ULg; Tychon, Bernard ULg

in Schmitz, Serge; Meert, Henk (Eds.) Les Journées des Géographes Belges: Evaluer la capacité du milieu (2003)

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference ... [more ▼]

Since the late 1960s, The Sahel of West Africa is affected by a long-term drought and increasing human pressure on the environment leading to desertification processes. The Normalised Difference Vegetation Index (NDVI), calculated from satellite imagery, is a reliable index of the vegetation status as the vegetation response to rainfall is very strong in semiarid environments. This article presents the NDVI and rainfall evolution from 1981 to 1999 in nine locations along a north-south transect from north-western Niger to north-eastern Benin. These two parameters are then statistically analysed to identify breaks in the trends within the datasets. Over the 19 years analysed, it appears that five out of the nine locations have recorded a significant increase of rainfall, while only two presented a significant increase in NDVI. This dichotomy in observed trends may highlight the on-going slow processes of environmental degradation. [less ▲]

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See detailRetrospective time trend study of brominated flame retardants and polychlorinated biphenyls in human serum from various regions of the United States, 1985-2002
Sjödin, Andreas; Jones, Richard S.; Lapeza, Chester et al

in Organohalogen Compounds (2003), 61

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See detailVerso il coordinamento : formazione e innovazione nella Comunità francese del Belgio
Pirard, Florence ULg

in Musatti, T.; Mayer, S. (Eds.) Il coordinamento dei servizi educativi per l’infanzia. Una funzione emergente in Italia e in Europa (2003)

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See detailAndropause and psychopathology: minor symptoms rather than pathological ones.
Delhez, Marie; Hansenne, Michel ULg; Legros, Jean-Jacques ULg

in Psychoneuroendocrinology (2003), 28(7), 863-74

This study examined the psychological symptomatology of men diagnosed with andropause and the association between calculated free testosterone (T) and depressed mood, anxiety and quality of life. Subjects ... [more ▼]

This study examined the psychological symptomatology of men diagnosed with andropause and the association between calculated free testosterone (T) and depressed mood, anxiety and quality of life. Subjects were 153 men, aged 50-70 years, who participated in a screening of andropause. Total testosterone, FSH, LH and SHBG levels were measured. Depressed mood was assessed with the Carroll Rating Scale, anxiety with the "anxiety-insomnia" dimension of the General Health Questionnaire, and quality of life with the World Health Organisation Quality of Life questionnaire. The results showed that levels of free T decreased with age, whereas FSH and LH increased. Carroll Rating Scale scores were higher among hypogonadal subjects, but the mean score was low and not pathological. A negative correlation was observed between severity of depression as assessed by the Carroll Rating Scale and free T levels. However, subjects with a significant score on this scale did not exhibit different free T levels compared to subjects with a non-significant depressive score. Anxiety and quality of life did not differ between hypogonadal and eugonadal subjects. The present study therefore suggests that andropause is not characterised by specific psychological symptoms, but may be associated with "depressive symptoms" that are not considered as pathological. [less ▲]

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See detailStochastic modelling of the hydrogeological environment in low permeability sediment
Huysmans, Marijke; Berckmans, Arne; Feyen, Luc et al

in Proceedings of IAMG 2003 (2003)

In Belgium, the Boom Clay is being considered as a potential host formation for the disposal of nuclear waste. Part of the safety assessment and feasibility studies of a potential nuclear waste disposal ... [more ▼]

In Belgium, the Boom Clay is being considered as a potential host formation for the disposal of nuclear waste. Part of the safety assessment and feasibility studies of a potential nuclear waste disposal consists of hydrogeological modeling. In order to model the groundwater flow and possible radionuclide transport in the clay, the spatial distribution of the hydraulic conductivity of the clay has to be assessed. In this study, geostatistical methods are used to characterize the hydraulic conductivity field. More specific, direct sequential simulation of the hydraulic conductivity is carried out, using measurements of hydraulic conductivity and 4 types of soft data or secondary variables: resistivity logs, gamma ray logs, grain size measurements and descriptions of the lithology. The primary and secondary information is analyzed with geostatistical tools and combined to generate 100 fields of the hydraulic conductivity of the Boom Clay. Next, each field is input to a groundwater flow model to predict the advective travel time of constituents released from the disposed waste in the Boom Clay to the aquifers surrounding the Boom Clay. Statistical analysis of the ensemble of model predictions results in a predictive distribution for the advective travel time. This distribution reflects the uncertainty of the advective travel time that results from the uncertainty of the spatial distribution of the hydraulic conductivity of the Boom Clay [less ▲]

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See detailPhysical processes study in the transition zone of the Northwest African upwelling: climatological data analysis
Elmoussaoui, Abdellali; Djenidi, Salim ULg; Kostianoy, Andrey

(2003)

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See detailComplex Hydrogeological Study of the Alluvial Transboundary Aquifer of Szamos/Somes (Romania-Hungary)
Lenart, Laszlo; Madarasz, Tamas; Miko, Lajos et al

in Water resources management in the 21th century. Subtheme 4, Relevance and sustainability of the intensive groundwater developments (2003)

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See detailGrowth hormone (GH) secretion in patients with childhood-onset GH deficiency: Retesting after one year of therapy and at final height
Thomas, Muriel; Massa, Guy; Maes, Maes et al

in Hormone Research (2003), 59(1), 7-15

Background. Recent studies have shown that many patients treated with growth hormone (GH) during childhood because of idiopathic GH deficiency (GHD) are no longer GH deficient when retested after ... [more ▼]

Background. Recent studies have shown that many patients treated with growth hormone (GH) during childhood because of idiopathic GH deficiency (GHD) are no longer GH deficient when retested after cessation of GH therapy when final height is achieved. These patients are labelled as transient GHD. We hypothesized that normalization of GH secretion in transient GHD could occur earlier during the course of GH treatment, which could allow earlier cessation of GH treatment. Methods: In a retrospective study, GH secretion was re-evaluated after cessation of GH treatment at final height in 43 patients diagnosed during childhood as idiopathic GHD 10 with multiple pituitary hormonal deficiencies (MPHD) and 33 with isolated GHD ([sGHD]). In a prospective study, GH secretion was re-assessed after interruption of GH treatment given for 1 year in 18 children with idiopathic GHD (2 MPHD, 16 IsGHD). GH secretion was evaluated by glucagon or insulin stimulation tests. Results: In the retrospective study, all the 10 patients with MPHD and 64% of the 33 patients with IsGHD were still deficient at re-evaluation using the paediatric criteria to define GHD (GH peak < 10 ng/ml at provocative test). The proportion of persisting deficiency was greater in patients with complete IsGHD (86%, 12/14 patients) than in patients with partial IsGHD (47%, 9/19 patients). With the criteria proposed in adulthood (GH peak <3 ng/ml), all the 10 patients with MPHD were still considered to be deficient. In contrast, only 15% (5/33 patients) with IsGHD had a maximal GH value < 3 ng/ml (36% of the 14 patients with complete IsGHD and none of the 19 patients with partial IsGHD). In the prospective study, after interruption of GH therapy given for 1 year, the 2 patients with MPHD were still GHD at re-evaluation and they resumed GH treatment. Among the 16 patients with IsGHD, 13 (81%) were still deficient (peak response < 10 ng/ml) after 1 year. Two of the 3 patients in whom GHD was not confirmed at retesting after 1 year GH showed again a deficient response at second retesting. Conclusions: Although many patients diagnosed with IsGHD during childhood have a normalized GH secretory capacity when retested during adulthood, early retesting after interruption of GH treatment given for 1 year during childhood does not enable to determine if GH therapy has to be discontinued before cessation of growth. Copyright (C) 2003 S. Karger AG, Basel. [less ▲]

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See detailNumerical shear tests for different elasto-plastic laws
de Montleau, P.; Duchene, Laurent ULg; Flores, Paulo et al

in Onate, E.; Owen, D. R. J. (Eds.) Proceedings of the VII International Conference on Computational Plasticity (COMPLAS 2003) (2003)

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu ... [more ▼]

This paper presents the numerical simulation of a cyclic simple shear test. The blank tested is a high strength steel sheet for which we use three different constitutive plastic laws derived from Teodosiu's model. These laws take into account respectively isotropic, kinematic and mixed isotropic-kinematic hardening. The goal of the paper is to provide a first numerical idea of the stress-strain path in the center of an experimental test sample. [less ▲]

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See detailUne méthode générique pour la classification automatique d'images à partir des pixels
Marée, Raphaël ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in Revue des Nouvelles Technologies de l'Information (2003), 1

Dans cet article, nous évaluons une approche générique de classification automatique d'images. Elle repose sur une méthode d'apprentissage récente qui construit des ensembles d'arbres de décision par ... [more ▼]

Dans cet article, nous évaluons une approche générique de classification automatique d'images. Elle repose sur une méthode d'apprentissage récente qui construit des ensembles d'arbres de décision par sélection aléatoire des tests directement sur les valeurs basiques des pixels. Nous proposons une variante, également générique, qui réalise une augmentation fictive de la taille des échantillons par extraction et classification de sous-fenêtres des images. Ces deux approches sont évaluées et comparées sur quatre bases de données publiques de problèmes courants: la reconnaissance de chiffres manuscrits, de visages, d'objets 3D et de textures. [less ▲]

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