References of "2004"
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See detailMeteor excitation and meteoroid abundances from quantitative spectroscopy
Jenniskens, P.; Laux, C. O.; Jehin, Emmanuel ULg

in 35th COSPAR Scientific Assembly (2004)

Meteor spectroscopy provides both quantitative data on the excitation conditions in the meteor plasma, the progressive ablation of mineral species in the meteoroid, and the meteoroid's elemental ... [more ▼]

Meteor spectroscopy provides both quantitative data on the excitation conditions in the meteor plasma, the progressive ablation of mineral species in the meteoroid, and the meteoroid's elemental abundances for selected elements. The recent NASA and USAF sponsored Leonid Multi-Instrument Aircraft Campaign provided high-resolution spectra of relatively faint meteors using a slit-less cooled CCD spectrograph. Additional observations from ground and space extended the wavelength range from 250 to 1050 nm. We have measured excitation conditions in the meteor plasma from studies of meteoric air plasma emissions (N_2, N, O, O_2) and ablated metal atom line emissions (Fe). Results were compared to laboratory calibrated air plasma emission models and LTE models of metal atom line emissions. Further insight was provided by a spectrum recorded serendipitously at the European Southern Observatory VLT telescope, which provides the first spectral information over a cross-section of a meteor trail. We also searched for emissions from CN, H, and OH that may be ablation products of organic matter and mineral water contained in the meteoroid. We will present an overview of the information gathered to date and discuss the meteoric metal atom abundances (Fe, Mg, Si, Na, Ca, Mn, Al, Ni, Ti, Sc, Cr, Co, and V) measured for representative meteoroids. [less ▲]

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See detailEffect of secondary schools on academic choices and on success in higher education
Pustjens, Heidi; Van De Gaer, Eva ULg; Van Damme, Jan et al

in School Effectiveness & School Improvement (2004)

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See detailAssimilation of Sea Surface Temperature predicted by a satellite-based forecasting system in a doubly nested primitive equation model of the Ligurian Sea
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Alvarez, A. et al

Conference (2004)

Data assimilation is traditionally used to combine model dynamics and observations in a statistical optimal way. Assimilation of observations improves therefore hindcasts and nowcasts of the ocean state ... [more ▼]

Data assimilation is traditionally used to combine model dynamics and observations in a statistical optimal way. Assimilation of observations improves therefore hindcasts and nowcasts of the ocean state than otherwise obtained by the model alone. The observational constraints are necessary to reduce uncertainties and imperfections of the ocean model. Due to the obvious lack of future observations, the model forecast cannot be controlled by observations and the predictive skill degrades as the forecast time lag increases. The error grow is not only caused by the chaotic nature of the system but also by the biases and drifts of the model. The later part can be reduced by considering different models with different imperfections. Data assimilation provides the statistical frame for merging the different model results. A primitive equation model of the Mediterranean Sea (1/4° resolution) has been implemented with two successive grid refinements of the Liguro-Provençal Basin (1/20°) and the Ligurian Sea (1/60°) respectively (Barth et al, 2003). The dependence of the ``parent'' model and the embedded ``child'' model is bi-directional; it involves the exchange of boundary conditions and feedback between the models. Alvarez el al. (2004) developed a statistical predictor for forecasting the SST of the Ligurian Sea with a time lag of 7 days based on the previous remote sensed SST. The degrees of freedom of the SST are reduced by an Empirical Orthogonal Function (EOF) analysis. A genetic algorithm trained by the historical SST evolution in the Ligurian Sea is used to predict the EOF amplitudes. Observed and forecasted SST are assimilated in the hydrodynamic model and the results of this two experiments are compared to the model run without assimilation. The assimilation of the forecasted SST reduces the error of the model by an amount comparable to the assimilation of real SST, showing the potential of skill improvement of combining statistical and hydrodynamic models. [less ▲]

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See detailL’enseignement et la connaissance de la matière des professeurs d’EPS. Le cas de la natation dans un lycée de l’agglomération grenobloise
Attikleme, Kossivi; Tanimomo, Libéral; Cloes, Marc ULg et al

in Revue de l'Education Physique (2004), 44(3), 83-93

Le but de cette étude est de montrer, d'une part, dans le système éducatif français, les diverses transformations ou modifications que les enseignants d'EPS font subir aux pratiques sportives lorsqu'ils ... [more ▼]

Le but de cette étude est de montrer, d'une part, dans le système éducatif français, les diverses transformations ou modifications que les enseignants d'EPS font subir aux pratiques sportives lorsqu'ils ont la volonté de les enseigner et, d'autre part, de mettre en évidence la connaissance de la nage qui caractérise chacun d'eux ou qui sous-tend le processus de transformation qu'ils opèrent en matière d'enseignement. C'est en effet un processus qui n'est pas spécifique au système éducatif français organisé au collège en cycles d'étude. ... [less ▲]

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See detailSegregation of the bulk blend fertilizers
Miserque, Olivier; Pirard, Eric ULg

in Chemometrics and Intelligent Laboratory Systems (2004), 74(1), 215-224

Bulk blend fertilizers are a mixture of different kinds of fertilizers in order to obtain a predicted N-P-K chemical composition. Although this production method has some advantages, segregation appears ... [more ▼]

Bulk blend fertilizers are a mixture of different kinds of fertilizers in order to obtain a predicted N-P-K chemical composition. Although this production method has some advantages, segregation appears at different stages, from the production to the final spreading on the field. An experiment has been implemented to predict and quantify the influence of some physical properties on the occurrence of segregation. The principle was to blend two fertilizers having identical physical properties except for one, such as size, shape or density and to measure the segregation of the blend following various operations, such as filling or emptying a container. Results show that the spread of the fragment size distribution has a big influence on the segregation of the generated heap. In order to reduce this phenomenon, the granulometric spread index (GSI) [(d(84)-d(16))/2d(50)] must be smaller than 10. Other properties don't seem to have an influence. The granulometric segregation can lead to a chemical heterogeneity. The absolute sum of the difference between d(16) and d(84) must be limited around 0.5 mm. Above this value, the chemical segregation begins to be excessive. It seems also that if there is a limited difference in size for the components, the chemical segregation is amplified if the density of the fertilizer with the biggest particles is lower. It is not the case for the difference in shape. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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See detailDouble-faced monster in the bottlenosed dolphin (Tursiops truncatus) found in the Mediterranean sea
Dabin, W.; Cesarini, C.; Clemenceau, I. et al

in Veterinary Record : Journal of the British Veterinary Association (2004), 154(10), 306-308

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See detailWhen Memory Shifts Toward More Typical Category Exemplars: Accentuation Effects in the Recollection of Ethnically Ambiguous Faces
Corneille, Olivier; Huart, Johanne ULg; Becquart, Emilie et al

in Journal of Personality & Social Psychology (2004), 86

In 4 studies, the authors examined the impact of categorization on the recollection of ethnically ambiguous faces. Participants were presented with faces lying at various locations on mixed-race continua ... [more ▼]

In 4 studies, the authors examined the impact of categorization on the recollection of ethnically ambiguous faces. Participants were presented with faces lying at various locations on mixed-race continua (i.e., Caucasian–North African and Caucasian–Asian faces were used as source images in a morphing program). In all studies, the prevalence of exclusive ethnic features in a face distorted participants’ recollections of the face toward faces more typical of the category. Specifically, the recollection of 30% North African (or 30% Asian) faces shifted toward Caucasian source faces, whereas the recollection of 70% North African (or 70% Asian) faces shifted toward North African (Asian) source faces. Memory distortions did not emerge for extremely ambiguous (50%) faces and proved larger on mixed-race than same-race continua (Studies 3 and 4). Memory distortions also emerged with high levels of confidence. The authors elaborate on the theoretical and practical implications of these findings. [less ▲]

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See detailExtraction of land use / landcover – related information from very high resolution data in urban and suburban areas
Van de Voorde, Tim; De Genst, William; Canters, Frank et al

in Goossens, Rudi (Ed.) Remote Sensing in Transition (2004)

Very High Resolution (VHR) satellite images offer a great potential for the extraction of landuse and land-cover related information for urban areas. The available techniques are diverse and need to be ... [more ▼]

Very High Resolution (VHR) satellite images offer a great potential for the extraction of landuse and land-cover related information for urban areas. The available techniques are diverse and need to be further examined before operational use is possible. In this paper we applied two pixel-by-pixel classification techniques and the object-oriented image analysis approach (eCognition) for a land-cover classification of a Quickbird image of a study area in the northern part of the city of Ghent (Belgium). Only small differences in overall Kappa were noted between the best results of the pixel-based approach (neural network classification with Haralick texture measures) and the object-oriented classification (eCognition). A rule-based procedure using ancillary information on elevation derived from a digital surface model was applied on the pixel-based land-cover classification in order to obtain information on the spatial distribution of buildings and artificial surfaces. [less ▲]

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See detailComplementary two-dimensional finite element formulations with inclusion of a vectorized Jiles-Atherton model
Gyselinck, Johan; Vandevelde, Lieven; Melkebeek, Jan et al

in Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering (2004), 23(4), 959-967

This paper deals with the magnetic vector and scalar potential formulation for two-dimensional (2D)finite element (FE) calculations including a vector hysteresis model, namely a vectorized Jiles-Atherton ... [more ▼]

This paper deals with the magnetic vector and scalar potential formulation for two-dimensional (2D)finite element (FE) calculations including a vector hysteresis model, namely a vectorized Jiles-Atherton model. The particular case of a current-free FE model with imposed fluxes and magnetomotive forces is studied. The non-linear equations are solved by means of the Newton-Raphson method, which leads to the use of the differential reluctivity and permeability tensor. The proposed method is applied to a simple 2D model exhibiting rotational flux, viz the T-joint of a three-phase transformer. [less ▲]

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See detailDu métier à l'expertise du sociologue : introduction en hommage à Renaud Sainsaulieu
Legrand, Monique; Vrancken, Didier ULg

in Legrand, Monique; Vrancken, Didier (Eds.) L’expertise du sociologue (2004)

Introductif, cet article précise le positionnement général de l'ouvrage en regard des travaux précédents portant sur la professionnalisation de la sociologie et établissant un lien avec les travaux de ... [more ▼]

Introductif, cet article précise le positionnement général de l'ouvrage en regard des travaux précédents portant sur la professionnalisation de la sociologie et établissant un lien avec les travaux de Renaud Sainsaulieu [less ▲]

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See detailCollective Retrieval hy Autonomous Rohots
Meyer, Patrick ULg

Conference (2004)

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See detailCrescere: difficoltà condivise tra genitori e figli
D'Amore, Salvatore ULg; Mulè, Angela M.

in Onnis, Luigi (Ed.) Il tempo sospeso. Anoressia e Bulimia tra Individuo, Famiglia e Società (2004)

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See detailNinawa-Former Excavations
Van der Stede, Véronique ULg

in Anastasio, Stefano; Lebeau, Marc; Sauvage, Martin (Eds.) Atlas of Preclassical Upper Mesopotamia (2004)

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See detailIntegration und Interaktion: Möglichkeiten des Einsatzes von Notebooks und Internet in der regelungstechnischen Lehre
Schumm, Peter; Bullinger, Eric ULg; Schweickhardt, Tobias et al

in AT-Automatisierungstechnik (2004), vol.52, no.2

Since a few years high-schools are testing the use of notebooks for teaching purposes and already use them quite successfully. A new approach is to use them also for academic education. In the first part ... [more ▼]

Since a few years high-schools are testing the use of notebooks for teaching purposes and already use them quite successfully. A new approach is to use them also for academic education. In the first part of this article an overview will be given about the concepts of the BMBF-sponsored project Notebook University. The second part describes how notebooks are used in the e-learning project to support the teaching of control theory [less ▲]

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See detailL’expertise sociologique en débat
Vrancken, Didier ULg; Piriou, Odile

in Legrand, Monique; Vrancken, Didier (Eds.) L’expertise du sociologue (2004)

Cet article résulte d'un débat conclusif entre les auteurs qui confrontent leurs points de vue autour de leurs travaux respectifs sur la professionnalisation, les métiers, l'expertise, l'intervention en ... [more ▼]

Cet article résulte d'un débat conclusif entre les auteurs qui confrontent leurs points de vue autour de leurs travaux respectifs sur la professionnalisation, les métiers, l'expertise, l'intervention en sociologie. [less ▲]

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See detailSimenon et la “crise” du roman
Denis, Benoît ULg

in Traces. Travaux du Centre d'Études Georges Simenon (2004), (15), 95-106

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See detailLe Haricot-igname Africain (Sphenostylis stenocarpa (Hochst. ex A. Rich.) Harms) : une légumineuse à graines et à tubercules sous-exploitée
Baudoin, Jean-Pierre ULg; Kamion Ngansia, F.

in Troupeaux et Cultures des Tropiques (2004), II(IV), 44-46

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See detailSartre en phénoménologie : A propos de "Sartre phénoménologue"
Cormann, Grégory ULg; Caeymaex, Florence ULg

in Etudes Sartriennes (2004), 9

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See detailTwo-dimensional model for the cold atom micromaser
Martin, John ULg; Solano, E.; Zagury, N. et al

Poster (2004)

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