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See detailFormes et enjeux du premier Verlaine
Saint-Amand, Denis ULg

in Acta Fabula : Revue des Parutions en Théorie Littéraire (2009)

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See detailContributions of the driven process and the loading-unloading process during substorms: A study based on the IMAGE-SI12 imager
Blockx, Caroline ULg; Gérard, Jean-Claude ULg; Coumans, Valérie ULg et al

in Journal of Geophysical Research (2009), 114

Substorm energetics has been shown to have two components, the "loading-unloading'' component releasing energy previously stored in the tail and the "directly driven'' component dissipating simultaneously ... [more ▼]

Substorm energetics has been shown to have two components, the "loading-unloading'' component releasing energy previously stored in the tail and the "directly driven'' component dissipating simultaneously fed solar wind energy. Previous studies disagree about the relative importance of each process. The SI12 spectral imager onboard the IMAGE satellite provides images of the Doppler-shifted Lyman alpha auroral emission at 121.8 nm every 2 min. It has been used to determine the auroral intensity during substorms, which may be compared to the solar wind characteristics and interplanetary magnetic field components before and/or after substorm onsets. In this study, we analyze 256 substorms between June 2000 and December 2002, which satisfy criteria relative to the viewing conditions. We compare the mean nightside intensity during the expansion phase with the magnetic open flux, the epsilon parameter, and other coupling functions (used as proxies of transfer of solar wind energy to the magnetosphere) integrated over the growth phase or the expansion phase. The mean auroral intensity during the expansion phase correlates well with coupling functions integrated over the growth phase. We also find that the correlation between the auroral precipitation during the expansion phase and the coupling functions integrated over the expansion phase is lower but still significant. This implies that, even though both mechanisms contribute to the energy precipitated during substorms, the loading-unloading process is statistically dominant. [less ▲]

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See detailLe Mésolithique récent du Trou Al’Wesse (comm. de Modave, Prov. de Liège) Découverte de tessons de type non rubanés ou «Bereitkeramiek»
Miller, Rebecca ULg; Otte, Marcel ULg; Stewart, John

in Notae Praehistoricae (2009), 29

On the terrace of the site of Trou Al'Wesse, commun of Modave (province of Liège, Belgium), stratum 4b-δ, excavated in 2008, has been attributed to the Late Mesolithic. Ceramic sherds of La Hoguette type ... [more ▼]

On the terrace of the site of Trou Al'Wesse, commun of Modave (province of Liège, Belgium), stratum 4b-δ, excavated in 2008, has been attributed to the Late Mesolithic. Ceramic sherds of La Hoguette type have been recovered from near the top of this Mesolithic context, which contains lithic artifacts, a charcoal lens, wild fauna including an aurochs astragalus with cutmarks, and a sawn red deer crown antler. LBK sherds of the type found in overlying stratum 4a, are absent in facies 4b-δ. This is the first time that La Hoguette sherds have been found instratified context associated with material that can be radiometrically dated, and also the first time that such sherds have been discovered south of the Meuse and Sambre in Belgium. New dates from this stratum contribute to placing these sherds and the other elements in chronological context. [less ▲]

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See detailStudying the sivers function by model calculations
Courtoy, Aurore ULg; Scopetta, S.; Vento, V.

in AIP Conference Proceedings (2009), 1105

A formalism is presented to evaluate the Sivers function in constituent quark models. A non-relativistic reduction of the scheme is performed and applied to the Isgur-Karl model. The sign for the u and d ... [more ▼]

A formalism is presented to evaluate the Sivers function in constituent quark models. A non-relativistic reduction of the scheme is performed and applied to the Isgur-Karl model. The sign for the u and d flavor contributions that we obtained turns out to be opposite. The Burkardt Sum Rule is fulfilled to a large extent. After the estimate of the QCD evolution of the results from the momentum scale of the model to the experimental one, a reasonable agreement with the available data is obtained. © 2009 American Institute of Physics. [less ▲]

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See detailComparative analysis of painting recipes: a new contribution to the study of the texts of the Strasbourg family
Neven, Sylvie ULg

in HERMENS, Erma; TOWNSEND, Joyce (Eds.) Sources and Serendipity. Testimonies of Artists’ Practice (2009)

For many years, the Strasbourg Manuscript was believed to be the oldest German-language source for the study of Northern European painting techniques. Unfortunately, the manuscript was lost in the 1870 ... [more ▼]

For many years, the Strasbourg Manuscript was believed to be the oldest German-language source for the study of Northern European painting techniques. Unfortunately, the manuscript was lost in the 1870 fire at the Strasbourg Library, and the text only survives in a 19th-century transcription made for Eastlake (1847). Studies such as those of Ploss and more recently those of Oltrogge have already highlighted the existence of texts with very similar contents, grouping them under the name of the ‘Strasbourg family’. Since these studies, a clearly defined corpus of manuscripts has been established as belonging to this family. This paper shows the different degrees of connection between the texts and presents some suggestions concerning their compilation process. The possibility of collating different versions of an identical text and cross-checking recipes can also be exploited to learn more about the ways in which recipe books were compiled, and to provide information concerning their use and function. [less ▲]

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See detailLe Code des sociétés annoté
Caprasse, Olivier ULg

Book published by La Charte (2009)

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See detailRoller Compacted Concrete with contaminated recycled aggregates
Courard, Luc ULg; Debieb, Farid; Kenai, Saïd et al

in Construction & Building Materials (2009), 23

Recycling waste building materials from construction and demolition (C&D) sites is increasingly investigated for economical and environmental reasons. Roller compacted concrete (RCC) is a special dry ... [more ▼]

Recycling waste building materials from construction and demolition (C&D) sites is increasingly investigated for economical and environmental reasons. Roller compacted concrete (RCC) is a special dry concrete mix; laid down and compacted like a soil, it is especially used for the construction of massive structures like dams or large horizontal surfaces like road foundation. In this paper, natural concrete slabs were cured in water, sea water, chloride solutions or sulphate solutions and then crushed to obtain virgin and contaminated (polluted) recycled aggregates. The aim of this research is the total replacement (100% coarse and fine) of natural aggregates (NA) by recycled concrete aggregates (RA) in the composition of a roller compacted concrete. The natural and recycled aggregates are characterised and compared. The mechanical properties and durability performances of concrete with contaminated RA are analysed. The experimental results showed that the polluted RA are much richer in chlorides than in sulphates and are leached if they are soaked in water. Significant differences were observed between the properties of original and new concrete and the results demonstrated the need of taking these contaminations into account. [less ▲]

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See detailATRP of Methacrylates Catalysed by Homo- and Heterobimetallic Ruthenium Complexes
Borguet, Yannick ULg; Sauvage, Xavier; Bicchielli, Dario ULg et al

in Matyjaszewski, Krzysztof (Ed.) Controlled/Living Radical Polymerization: Progress in ATRP (2009)

The catalytic activity of a series of ruthenium-based homo- and heterobimetallic complexes was determined by investigating the atom transfer radical polymerisation of methyl methacrylate. The complexes ... [more ▼]

The catalytic activity of a series of ruthenium-based homo- and heterobimetallic complexes was determined by investigating the atom transfer radical polymerisation of methyl methacrylate. The complexes under investigation were [(arene)Ru(µ-Cl)3RuCl(C2H4)-(L)] (L = PCy3 or a N-heterocyclic carbene ligand), [(p-cymene)-Ru(µ-Cl)3RuCl(=C=CHR)(PCy3)] (R = Ph or t-Bu), and [RuCl2-(p-cymene){PCy2(CH2)2(eta5-C5H4)TiX2(eta5-C5H5)}] (X = Cl, F, and OBz). The catalytic activity of a variety of related [(p-cymene)-ClRu(µ-Cl)2Ru(O‚^N)(=CHPh)] complexes (O^N is a Schiff base ligand) is also reported. The results clearly demonstrate that the ligands strongly affect the ability of the resulting ruthenium complexes to favour the occurrence of a well-behaved ATRP. [less ▲]

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See detailMonitoring certain endocrine parameters for predicting stillbirth in dairy cows
Szenci, Otto; Bajcsy, A Cs; Brydl, E. et al

in Proceedings: XVII International congress of mediterranean federation of health and production of ruminants (2009)

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See detailmycoses
PIERARD, Gérald ULg; QUATRESOOZ, Pascale ULg; PIERARD-FRANCHIMONT, Claudine ULg

in Dermatologie et infections sexuellement transmissibles (2009)

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See detailHomeostatic sleep pressure and responses to sustained attention in the suprachiasmatic area.
Schmidt, Christina ULg; Collette, Fabienne ULg; Leclercq, Yves ULg et al

in Science (2009), 324(5926), 516-9

Throughout the day, cognitive performance is under the combined influence of circadian processes and homeostatic sleep pressure. Some people perform best in the morning, whereas others are more alert in ... [more ▼]

Throughout the day, cognitive performance is under the combined influence of circadian processes and homeostatic sleep pressure. Some people perform best in the morning, whereas others are more alert in the evening. These chronotypes provide a unique way to study the effects of sleep-wake regulation on the cerebral mechanisms supporting cognition. Using functional magnetic resonance imaging in extreme chronotypes, we found that maintaining attention in the evening was associated with higher activity in evening than morning chronotypes in a region of the locus coeruleus and in a suprachiasmatic area (SCA) including the circadian master clock. Activity in the SCA decreased with increasing homeostatic sleep pressure. This result shows the direct influence of the homeostatic and circadian interaction on the neural activity underpinning human behavior. [less ▲]

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See detailNeed for high-standard translation methodology for the dissemination of guidelines.
Henrotin, Yves ULg

in Osteoarthritis and Cartilage (2009), 17(12), 1536-8

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See detailDe nouveaux enjeux sur l’espace : la délimitation des premières forêts communautaires au Gabon
Vermeulen, Cédric ULg; Schippers, C.; Ndouna, A. A. et al

in International Journal of Biological and Chemical Sciences (2009), 3(5), 1171-1181

Le Gabon s’est doté il y a quelques années d’une nouvelle loi forestière intégrant les populations locales dans la gestion durable des massifs forestiers à travers le concept de « forêts communautaires » ... [more ▼]

Le Gabon s’est doté il y a quelques années d’une nouvelle loi forestière intégrant les populations locales dans la gestion durable des massifs forestiers à travers le concept de « forêts communautaires ». L’une des premières étapes dans la mise en place de ces forêts communautaires est la délimitation de celles-ci. Cet article aborde le cas concret de la délimitation d’une première forêt communautaire dans ce pays, le cas du regroupement de villages de Ebe Messe Melane. La délimitation suit une approche intégrée afin de concilier d’une part les contraintes légales et d’autre part l’occupation de l’espace actuelle par les populations villageoises. Cet exemple permet d’illustrer les différents enjeux que soulève la délimitation des forêts communautaires. Des enjeux spatiaux, financiers ou identitaires qui impliquent les acteurs aux intérêts parfois divergents que sont les communautés villageoises, l’Etat et les opérateurs forestiers privés. [less ▲]

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See detailClinal differentiation during invasion: Senecio inaequidens (Asteraceae) along altitudinal gradients in Europe.
Monty, Arnaud ULg; Mahy, Grégory ULg

Poster (2009)

Plant population differentiation may play a role in decreasing the ability to predict whether, where, and when an introduced species will invade. However, few studies have addressed the level of genetic ... [more ▼]

Plant population differentiation may play a role in decreasing the ability to predict whether, where, and when an introduced species will invade. However, few studies have addressed the level of genetic change an alien species may undergo during range expansion, e.g. in response to climatic variation with altitude. In the present study, we tested the hypothesis that invasive populations of Senecio inaequidens (Asteraceae) differentiated during migration from two independent introduction sites into divergent altitudinal and climatic zones. We carried out two years of common garden experiments with eight populations from a Belgian altitudinal transect and ten populations from similar French transect. Climatic analysis revealed that the Belgian transect followed a temperature and precipitation gradient. A temperature and summer drought gradient characterized the French study site. We evaluated differentiation and clinal variation in the following characters: days to germination, days to flowering, height at maturity, final plant height and aboveground biomass. Results showed that S. inaequidens populations differentiated in growth traits during invasion. First year of experiment, regressing population growth trait means against source population altitude indicated the presence of clinal variation along both transects. Second year, similar results were found along the French transect, i.e. a reduction in height at maturity, plant height and aboveground biomass with increasing altitude. Including seed mass as a covariate did not change the outcome of the analysis. The possible evolutionary causes for the differentiation observed are discussed. [less ▲]

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See detailPsychological harassment in the workplace : case-study and building of a new analysis model.
Faulx, Daniel ULg; Delvaux, Sophie; Brun, Jean-Pierre

in Relations Industrielles = Industrial Relations (2009), 64(2), 286-306

From a case-study based on an analysis model, which takes into account four levels of explanation (personal, interpersonal, group and organizational), and includes the study of the interactions between ... [more ▼]

From a case-study based on an analysis model, which takes into account four levels of explanation (personal, interpersonal, group and organizational), and includes the study of the interactions between these different levels, this report puts forward six observations: (1) the importance of performing the analysis on several levels, (2) the existence within harassment situations of two types of process (victimizing and conflictual), (3) the fact that these processes can co- exist at different levels of analysis, (4) the existence of interactions between processes, (5) the variability of a situation across time, and (6) the necessity of distinguishing two categories of influence involved in contextual processes. From these conclusions, the authors develop a new analysis model, which is process- based, integrative and dynamic. [less ▲]

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See detailDe la codicologie à l'archéologie du savoir. Le cas particulier du carnet de notes de l'historien égyptien al-Maqrīzī (m. 845/1442)
Bauden, Frédéric ULg

in Archives et Bibliothèques de Belgique = Archief en Bibliotheekwezen in Belgie (2009), 87

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