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See detailL'astronomie dans le monde
Manfroid, Jean ULg

Article for general public (2008)

Chang'e 1; Météorites; Aurore mystérieuse sur Saturne; CoRoT; XO-3b; Disque de gaz autour d'étoiles jeunes; Hauméa; L'origine de Titan et de son atmosphère; Jupiter; Météorites; Le Crabe vu par Chandra; L ... [more ▼]

Chang'e 1; Météorites; Aurore mystérieuse sur Saturne; CoRoT; XO-3b; Disque de gaz autour d'étoiles jeunes; Hauméa; L'origine de Titan et de son atmosphère; Jupiter; Météorites; Le Crabe vu par Chandra; L'univers en UV; Images d'exoplanètes ?; Epsilon Eridani; [less ▲]

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See detailLe Passage Lemonnier à Liège
Charlier, Sébastien ULg; Micha, Edith ULg; Moor, Thomas

in Cahiers de l'Urbanisme (Les) (2008), 70

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See detailRapport d'évaluation du réseau "Mieux manger à l'école" de la Fondation Roi Baudouin
Van Hoye, Aurélie; Vandoorne, Chantal ULg

Report (2008)

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See detailEtude chromatographique de substances volatiles : cas des sémiochimiques
Heuskin, Stéphanie ULg

Scientific conference (2008, December)

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Peer Reviewed
See detailAn-Naïm, pour une réforme du droit musulman
Carlier, Jean-Yves ULg

in Revue Nouvelle (2008)

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See detailPetits commerces, grands préjugés
Dawance, Sophie ULg

in Politique : Revue de Débats (2008), 55

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See detailLe Childhood Anxiety Sensitivity Index-Revised (CASI-R) : Etude de validation.
Stassart, Céline ULg; Depauw, Brigitte; Delvaux, Muriel ULg et al

Poster (2008, November 28)

La sensibilité à l'anxiété est la peur des sensations corporelles liées à l’anxiété, qui proviendrait de croyances que ces sensations ont des conséquences somatiques, psychologiques ou sociales néfastes ... [more ▼]

La sensibilité à l'anxiété est la peur des sensations corporelles liées à l’anxiété, qui proviendrait de croyances que ces sensations ont des conséquences somatiques, psychologiques ou sociales néfastes. Ce concept a été très peu exploré dans le contexte infantile. L’AS étant considérée comme un facteur de risque dans le développement et le maintien des troubles anxieux, ceci montre l’intérêt de s’intéresser davantage à l’outil d’évaluation de l’AS dans le contexte infantile, le Childhood Anxiety Sensitivity Index revised. L'objectif de cette étude est de d'évaluer les propriétés psychométriques de la version française de la CASI-R auprès d'un échantillon de 60 enfants âgés de 10 à 11 ans. En ce qui concerne les résultats, la confrontation de la CASI-R aux qualités psychométriques nous fournit des premiers éléments en faveur de l’intérêt clinique et de la pertinence théorique de cet outil dans le contexte infantile. En ce sens, la poursuite de son développement paraît constituer une perspective intéressante. [less ▲]

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See detailCe que les NAC nous apprennent sur la médecine factuelle
Vandeweerd, Jean-Michel; Vandenput, Sandrina ULg

Conference (2008, November 28)

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See detailDesign of perfluorinated macroligand for the implementation of atom transfer radical polymerization in supercritical carbon dioxide
Grignard, Bruno ULg; Jérôme, Christine ULg; Calberg, Cédric ULg et al

Conference (2008, November 28)

Due to an increasing need for polymers with well-defined architecture (diblock-, graft-, star-shaped copolymers), molecular weight and/or functional end-groups, the use of controlled radical ... [more ▼]

Due to an increasing need for polymers with well-defined architecture (diblock-, graft-, star-shaped copolymers), molecular weight and/or functional end-groups, the use of controlled radical polymerization (CRP) in scCO2 has started to gain attention. Among all the controlled processes, Atom Transfer Radical Polymerization has emerged as a robust tool for the preparation of polymers with well-defined molecular weight, architecture and chain-end functionality. The goal of the research relies on the development of ATRP of vinyl monomers in scCO2. Perfluorinated polymethacrylate, i.e. poly2,2,2-trifluoroethyl methacrylate (PFMA), was successfully prepared by homogenous ATRP using a polymeric ligand in order to complex the copper catalyst. CO2-soluble poly(2,2,2-trifluoroethylmethacrylate) was also prepared in supercritical CO2 by supported ATRP using a “pseudo-homogeneous” catalyst consisting of copper (I) ligated by macroligand immobilized onto an inorganic support, that results in polymers with well defined molecular weight and low polydispersity. The first efficient dispersion ATRP of methyl methacrylate (MMA) in scCO2 using a fluorinated polymeric ligand that had a dual role, i.e., the complexation of the copper salt and the stabilization of PMMA growing particles was also reported and the concept of dispersion ATRP was extended to the dispersion ATRP of styrene, to the synthesis of diblock copolymers beads using PMMA beads as macroinitiators, leading to (co)polymers with predictable molecular weight and narrow polydispersity. Finally, because both ATRP and alkyne-azide Huisgen’s 1,3-dipolar cycloaddition relies on the use of a Cu(I) catalyst, synthesis of pyrene end-functionalized polymers by simultaneous dispersion ATRP and click reaction was also investigated in supercritical carbon dioxide, leading to the formation of PMMA of well defined characteristics that was collected as fluorescent micropheres. [less ▲]

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See detailTrend analysis of greenhouse gases over Europe measured by a network of ground-based remote FTIR instruments
Gardiner, Tom; Forbes, A.; De Mazière, Martine et al

in Atmospheric Chemistry and Physics (2008), 8(22), 6719-6727

This paper describes the statistical analysis of annual trends in long term datasets of greenhouse gas measurements taken over ten or more years. The analysis technique employs a bootstrap resampling ... [more ▼]

This paper describes the statistical analysis of annual trends in long term datasets of greenhouse gas measurements taken over ten or more years. The analysis technique employs a bootstrap resampling method to determine both the long-term and intra-annual variability of the datasets, together with the uncertainties on the trend values. The method has been applied to data from a European network of ground-based solar FTIR instruments to determine the trends in the tropospheric, stratospheric and total columns of ozone, nitrous oxide, carbon monoxide, methane, ethane and HCFC-22. The suitability of the method has been demonstrated through statistical validation of the technique, and comparison with ground-based in-situ measurements and 3-D atmospheric models. [less ▲]

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See detailLexical Learning in Bilingual Adults: The Relative Importance of Short-Term Memory for Serial Order and Phonological Knowledge
Majerus, Steve ULg; Poncelet, Martine ULg; Van der Linden, Martial ULg et al

in Cognition (2008)

Studies of monolingual speakers have shown a strong association between lexical learning and short-term memory (STM) capacity, especially STM for serial order information. At the same time, studies of ... [more ▼]

Studies of monolingual speakers have shown a strong association between lexical learning and short-term memory (STM) capacity, especially STM for serial order information. At the same time, studies of bilingual speakers suggest that phonological knowledge is the main factor that drives lexical learning. This study tested these two hypotheses simultaneously in participants with variable levels of English-French bilingual proficiency. A word-nonword paired-associate learning task was administered, with nonwords obeying French phonotactic patterns. French phonological knowledge was estimated by a composite French proficiency score summarizing productive and receptive French vocabulary knowledge as well as quantitative and qualitative measures of French exposure. STM measures maximized retention of order information (serial order reconstruction) or retention of phonological item information (single nonword delayed repetition). The French proficiency score and the serial order STM measure independently predicted performance on the paired-associate learning task. These results highlight the conjoined role of phonological knowledge and serial order STM in lexical learning. Importantly, serial order STM remains a strong predictor of lexical learning, even for bilingual individuals who have broad phonological knowledge. [less ▲]

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See detailAccompagner efficacement des acteurs du système scolaire dans la mise en place de projets éducatifs visant au développement de compétences citoyennes chez chacun des élèves: proposition d'un protocole d'accompagnement
Radermaecker, Geoffray ULg

in Analele Ştiinţifice ale Universităţii "Alexandru Ioan Cuza" - Secţ. Ştiinţele Educaţiei (2008), vol. XII

In the present article, we tried to conceive an action methodology to help ground practitioners in school context to manage situations lived as difficult, real and complex and to elaborating knowledge ... [more ▼]

In the present article, we tried to conceive an action methodology to help ground practitioners in school context to manage situations lived as difficult, real and complex and to elaborating knowledge validated by the action. To do it, we imagined a device of accompaniment – answering the criteria of research-action elaborated by Liu (1997) – who considers the ground professionals as co-experts [Stengers, on 1997]. We hope this fact to establish more actionnables knowledges. [less ▲]

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See detailResonant and rolling droplet
Dorbolo, Stéphane ULg; Terwagne, Denis ULg; Vandewalle, Nicolas ULg et al

in New Journal of Physics (2008), 10

When an oil droplet is placed on a quiescent oil bath, it eventually collapses into the bath due to gravity. The resulting coalescence may be eliminated when the bath is vertically vibrated. The droplet ... [more ▼]

When an oil droplet is placed on a quiescent oil bath, it eventually collapses into the bath due to gravity. The resulting coalescence may be eliminated when the bath is vertically vibrated. The droplet bounces periodically on the bath, and the air layer between the droplet and the bath is replenished at each bounce. This sustained bouncing motion is achieved when the forcing acceleration is higher than a threshold value. When the droplet has a sufficiently low viscosity, it significantly deforms: spherical harmonic Y-1(m) modes are excited, resulting in resonant effects on the threshold acceleration curve. Indeed, a lower acceleration is needed when I modes with m = 0 are excited. Modes m not equal 0 are found to decrease the bouncing ability of the droplet. A break of degeneracy is observed for the m parameter. In particular, when the mode 1 = 2 and m = 1 is excited, the droplet rolls on the vibrated surface without touching it, leading to a new self-propulsion mode. [less ▲]

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See detailModelling the Ionosphere over Europe: Investigation of NeQuick Formulation
Bidaine, Benoît ULg; Warnant, René ULg

Poster (2008, November 18)

The modelling of the Total Electron Content (TEC) plays an important role in global satellite navigation systems (GNSS) accuracy, especially for single-frequency receivers, the most common ones ... [more ▼]

The modelling of the Total Electron Content (TEC) plays an important role in global satellite navigation systems (GNSS) accuracy, especially for single-frequency receivers, the most common ones constituting the mass market. For the latter and in the framework of Galileo, the NeQuick model has been chosen for correcting the ionospheric error contribution. It has been designed to calculate the electron density at a given point of the ionosphere according to the time conditions and the solar activity. This electron density can be integrated along the path from the receiver to the considered satellite to provide the TEC. For Galileo, a parameter Az (“effective ionisation level”) will be provided to the model as solar activity information and will be daily updated by the ground stations. Since NeQuick was chosen for Galileo purpose, a new version of the model has been released. It involves simplifications in the representation of the bottomside as well as a unique formula for a key parameter of the topside formulation previously defined through two equations, each one used for six months of the year. Hence we decided to investigate consecutive improvements and remaining weaknesses of this new formulation. To this extent, we take benefit of various ionosphere data from several European stations (Chilton in UK, Dourbes in Belgium, El Arenosillo and Roquetes in Spain, Pruhonice in Czech Republic) where ionosonde and GPS TEC data are available for different solar activity levels. These data allow us to study NeQuick representation of the ionosphere at mid-latitudes. We investigate the difference between GPS-derived vTEC and corresponding values from NeQuick for the latest years (between solar maximum in 2000 and minimum in 2007) in order to observe the temporal dependencies towards Universal Time, season and solar activity. We use ionosonde data to constrain the model so that we can concentrate on its formulation of the profile only. We especially highlight the improvements from the second version of NeQuick and show the critical importance of the topside formulation. [less ▲]

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See detailIonospheric variability which degrades the precision of real time GNSS applications
Wautelet, Gilles ULg; Lejeune, Sandrine; Warnant, René ULg

Poster (2008, November 18)

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See detailA very short presentation about LaTeX
Merciadri, Luca ULg

Learning material (2008)

A short presentation about LaTeX typesetting system.

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See detailModelling soil heterotrophic respiration in an agricultural soil: Model structure and first comparison with experimental data.
Buysse, Pauline ULg; Le Dantec, Valérie; Sagnier, Charlotte et al

Poster (2008, November 17)

Ce travail visait à adapter un modèle de respiration hétérotrophe du sol à un site agricole situé en Hesbaye (Belgique) et cultivé avec une rotation betterave sucrière / blé d’hiver / pomme de terre / blé ... [more ▼]

Ce travail visait à adapter un modèle de respiration hétérotrophe du sol à un site agricole situé en Hesbaye (Belgique) et cultivé avec une rotation betterave sucrière / blé d’hiver / pomme de terre / blé d’hiver. A long terme, ce modèle fera partie intégrante d’un modèle plus important qui décrira la respiration totale du sol et l’évolution du contenu en carbone du sol dans les cultures. Le modèle utilisé dans ce travail est dérivé du modèle Century, possède un pas de temps journalier et couvre une échelle spatiale de l’ordre de l’écosystème. La paramétrisation du modèle a été réalisée sur base d’une recherche bibliographique et de données collectées sur le site Carbo-Europe de Lonzée. Les caractéristiques du sol sont issues d’analyses réalisées sur des sols limoneux, typiques de la région de Hesbaye. Les variables conductrices (variables météorologiques et apports de litière) furent obtenues suite à une campagne de mesures de 4 ans réalisée sur le site expérimental de Lonzée. Les paramètres biochimiques du blé, de la pomme de terre et de la betterave furent tirés de la littérature. Une analyse de sensibilité fut réalisée en vue de classer les différents paramètres par rapport à leur impact sur le taux de respiration et les contenus en carbone de chaque pool. Les paramètres les plus importants étaient ceux contrôlant la réponse à la température, l’apport de litière et les teneurs en lignine et en azote. Des différences d’impact à court et long terme ont aussi été mises en évidence, notamment à cause de la dynamique de stabilisation des pools et des types de résidus de culture. Finalement, cette analyse nous a permis de définir de futures expériences qui seraient nécessaires pour améliorer l’ajustement du modèle sur des données expérimentales. [less ▲]

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