References of "2008"
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See detailOscillation of Saturn's southern auroral oval
Nichols, J. D.; Clarke, J. T.; Cowley, S. W. H. et al

in Journal of Geophysical Research (2008), 113(A11),

Near-planetary-period oscillations in the Cassini plasma and magnetic field data have been observed throughout Saturn's magnetosphere despite the fact that Saturn's internal magnetic field is apparently ... [more ▼]

Near-planetary-period oscillations in the Cassini plasma and magnetic field data have been observed throughout Saturn's magnetosphere despite the fact that Saturn's internal magnetic field is apparently highly axisymmetric. In addition, the period of the Saturn kilometric radiation has been shown to vary over time. In this paper we present results from the recent Hubble Space Telescope observations of Saturn's southern ultraviolet auroral emission. We show that the center of the auroral oval oscillates with period 10.76 h +/- 0.15 h for both January 2007 and February 2008, i.e., close to the periods determined for oscillations in other magnetospheric phenomena. The motion of the oval center is described for 2007 by an ellipse with semimajor axis similar to 1.4 degrees +/- 0.3 degrees oriented toward similar to 09-21 h LT, eccentricity similar to 0.93, and center offset from the spin axis by similar to 1.8 degrees toward similar to 04 h LT. For 2008 the oscillation is consistent with an ellipse with semimajor axis similar to 2.2 degrees +/- 0.3 degrees oriented toward similar to 09-21 h LT, eccentricity similar to 0.99, and a center offset from the spin axis by similar to 2.2 degrees toward similar to 03 h LT. The motion of the auroral oval is thus highly elliptical in both cases, and the major oscillation axis is oriented toward prenoon/premidnight. This result places an independent constraint on the magnitude of the planet's dipole tilt and may also indicate the presence of an external current system that imposes an asymmetry in the ionospheric field modulated close to the planetary period. [less ▲]

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See detailToll-like receptor-4 is expressed in meningiomas and mediates the antiproliferative action of paclitaxel.
Tichomirowa, Maria A.; Theodoropoulou, Marily; Daly, Adrian ULg et al

in International Journal of Cancer = Journal International du Cancer (2008), 123(8), 1956-63

Meningiomas are the second most common type of brain and CNS tumors by histology. Surgery and radiotherapy are main treatment options, but meningiomas may be impossible to adequately resect or may regrow ... [more ▼]

Meningiomas are the second most common type of brain and CNS tumors by histology. Surgery and radiotherapy are main treatment options, but meningiomas may be impossible to adequately resect or may regrow after surgery. In spite of many experimental attempts, there is no generally accepted chemotherapeutic approach. We have studied in a series of meningiomas the expression of the Toll-like receptor 4 (TLR4), which apart from its major role as a key factor of the innate immune system, is believed to play a role in tumorigenesis. All meningiomas studied expressed TLR4 mRNA and protein at variable degree. Paclitaxel, a ligand of TLR4, exhibited a dose- and time-dependent growth suppression in both monolayer and spheroid meningioma cell cultures. The knockdown of TLR4 with siRNA in meningioma cell cultures abrogated the inhibitory effect of paclitaxel. The suppressive action of paclitaxel on meningioma cell growth was enhanced in the presence of fluvastatin or the mitogen-actvated protein kinase (ERK1/2) inhibitor PD98059. At least part of the growth suppressive effect was mediated by the induction of apoptosis in meningioma cells by paclitaxel alone or in combination with fluvastatin. In conclusion, our in vitro results suggest that paclitaxel alone or in combination with other inhibitors of cell growth (statins, MAPK inhibitors) could provide a potential tool for the treatment of TLR4 expressing meningiomas. [less ▲]

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See detailQualité des fourrages en Région Wallonne
Decruyenaere, Virginie; Agneessens, Richard; Toussaint, Bernard et al

Book published by REQUASUD (2008)

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See detailL'actualité du droit des ententes en 2007
Petit, Nicolas ULg

in Les Petites Affiches (2008)

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See detailValidation of a method for the determination of sterols and triterpenes in the aerial part of Justicia anselliana (Nees) T. Anders by capillary gas chromatography.
Kpoviessi, Dossou Sika Salome; Gbaguidi, Fernand; Gbenou, Joachim et al

in Journal of Pharmaceutical & Biomedical Analysis (2008), 48(4), 1127-35

An accurate and sensitive method, combining soxhlet extraction, solid phase-extraction and capillary gas chromatography is described for the quantitative determination of one triterpene (lupeol) and three ... [more ▼]

An accurate and sensitive method, combining soxhlet extraction, solid phase-extraction and capillary gas chromatography is described for the quantitative determination of one triterpene (lupeol) and three sterols (stigmasterol, campesterol and beta-sitosterol) and the detection of another triterpene (alpha-amyrin) from the aerial part of Justicia anselliana. This is the first method allowing the quantification of sterols and triterpenes in this plant. It has been fully validated in order to be able to compare the sterol and triterpene composition of different samples of J. anselliana and therefore help to explain the allelopathic activity due to these compounds. This method showed that the aerial part of J. anselliana contained (292+/-2)mg/kg of lupeol, (206+/-1)mg/kg of stigmasterol, (266+/-2)mg/kg of campesterol and (184+/-9)mg/kg of beta-sitosterol. [less ▲]

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See detailSavoir rechercher et interroger : les repères méthodologiques
Pochet, Bernard ULg

in Noël, Elisabeth (Ed.) Ressources Electroniques pour les Etudiants, la Recherche et l'Enseignement (REPERE) (2008)

REPERE n’est pas une publication très ancienne, puisqu’elle a été créée en 2003 sous sa forme électronique, et est sortie pour la première fois en 2005 sous forme papier. Et pourtant, à l’aune du temps de ... [more ▼]

REPERE n’est pas une publication très ancienne, puisqu’elle a été créée en 2003 sous sa forme électronique, et est sortie pour la première fois en 2005 sous forme papier. Et pourtant, à l’aune du temps de l’Internet, une refonte de ses contenus était en grande partie nécessaire. En effet, ces dernières années ont vu de nombreuses évolutions, qui, sans révolutionner la recherche documentaire, l’ont modifié, en particulier pour les ressources électroniques. Ainsi, si Google fête à peine ses 10 ans en septembre 2008, cette décennie a été celle de son ascension, proposant sans cesse de nouvelles fonctionnalités, parfois discrètes. Google book search a, à une époque, fait couler beaucoup d’encre, mais Google Scholar, dans l’ombre du géant, prenait une place peut-être plus dangereuse, en tout cas en ce qui concerne la recherche d’information scientifique. De nos jours, la recherche d’information ne peut plus se penser sans Google, même si Google doit être dépassé et ne peut rester l’unique outil. Le web 2.0, terme certes galvaudé, reflète aussi une autre évolution de l’Internet, dans ce qu’il renforce l’aspect collaboratif et participatif de tous les internautes. La production d’information a changé, ainsi que son accès, et donc sa recherche. Les professionnels de l’information ont très vite intégré ces changements dans leurs formations, à travers les supports pédagogiques proposés par les URFIST et les Services communs de la documentation, ainsi que par les nombreuses formations dispensées. La notion d’éducation à l’information, de culture informationnelle est maintenant répandue au-delà de la simple sphère bibliothéconomique. Aussi, cette nouvelle version de REPERE reflète ces évolutions, et intègre de nouveaux outils. Certains chapitres ont été juste actualisés, d’autres complètement refondus, enfin de nouvelles parties ont été ajoutées, sur le besoin d’information ou le plagiat, pour ne pas les citer toutes. Nous espérons que cette brochure réactualisée saura être une première réponse à grands nombres de vos questions. N’hésitez pas à nous faire part de vos remarques, à nous signaler comment vous utilisez cette brochure et si elle répond à vos besoins. Nous en tiendrons compte pour la prochaine version. [less ▲]

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See detailLes hyperconflits en organisation
Faulx, Daniel ULg; Delvaux, Sophie

in Actes du 15ème Congrès de Psychologie du Travail et des Organisation de Langue Française. CD-rom. Québec.. (2008)

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de ... [more ▼]

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de huit focus groups composés de professionnels du traitement des conflits, nous dégageons 24 indicateurs des hyperconflits. Plus généralement, il ressort de notre étude que ces situations sont liées à une réduction de la complexité du système organisationnel couplée à une généralisation de la dynamique conflictuelle du point de vue de l’espace-temps, des processus et des conséquences. Les implications en termes d’interventions sont également discutées. [less ▲]

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See detailL'espace et le jeu chez l'enfant instable
Gauthier, Jean-Marie ULg; Berger, M.; Potelle, D. et al

in Joly, Fabien (Ed.) L’enfant hyperactif (2008)

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See detailA quasi-coulomb model for frictional contact interfaces. Application to metal forming simulations
Garcia-Garino, Carlos; Ponthot, Jean-Philippe ULg

in Latin American Applied Research (2008), 38(2), 95-104

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in ... [more ▼]

Frictional contact interfaces have to be modeled in practice when industrial problems such as metal forming operations, crashworthiness, and so on, have to be simulated. Usually a Coulomb model is used in order to describe the constitutive law for the frictional case. Following a standard non associated plasticity approach to Coulomb law a non-symmetric tangent operator results, and so a non-symmetric solver has to be used in order to take full advantage of consistent operators. With respect to symmetric ones, these non-symmetric operators lead to prohibitive computational times. However, in practice different schemes have been proposed in order to recover the symmetric operator, and consequently, use a symmetric solver. In this work an alternative approach based on an idea due to Garcia Garino and Oliver (1992) is defined in order to avoid to deal with non-symmetric solvers and thus save a large amount of computational time, which renders the computational simulation more attractive to industry. Applications to metal forming simulations and crashworthiness analysis are considered. [less ▲]

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See detailDecomposition of symmetric tensor fields in the presence of a flat contact projective structure
Frégier, Yaël; Mathonet, Pierre ULg; Poncin, Norbert

in Journal of Nonlinear Mathematical Physics (2008), 15(2), 252-269

Let M be an odd-dimensional Euclidean space endowed with a contact 1-form \alpha. We investigate the space of symmetric contravariant tensor fields over M as a module over the Lie algebra of contact ... [more ▼]

Let M be an odd-dimensional Euclidean space endowed with a contact 1-form \alpha. We investigate the space of symmetric contravariant tensor fields over M as a module over the Lie algebra of contact vector fields, i.e. over the Lie subalgebra made up of those vector fields that preserve the contact structure defined by \alpha. If we consider symmetric tensor fields with coefficients in tensor densities (also called symbols), the vertical cotangent lift of the contact form \alpha defines a contact invariant operator. We also extend the classical contact Hamiltonian to the space of symbols. This generalized Hamiltonian operator on the space of symbols is invariant with respect to the action of the projective contact algebra sp(2n+2) the algebra of vector fields which preserve both the contact structure and the projective structure of the Euclidean space. These two operators lead to a decomposition of the space of symbols, except for some critical density weights, which generalizes a splitting proposed by V. Ovsienko. [less ▲]

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See detailExercices corrigés de mathématiques, tome 2
Dupont, Pascal ULg

Book published by De Boeck Université - 3e édition (2008)

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See detailTutta colpa di Mick Jagger
Montana, Cyril; Ricciardi, Stefania ULg

Book published by Excelsior1881 (2008)

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See detailChemical Characterization Of Cuticular Extracts Of Sitobion Avenae (Hemiptera : Aphididae)
Muratori, Frédéric; Hance, Thierry; Lognay, Georges ULg

in Annals of the Entomological Society of America (2008), 101(3), 598-603

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See detailClimatologie - Topoclimatologie
Erpicum, Michel ULg

Book (2008)

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See detailAngles corniculaires et nombres superréels
Bair, Jacques ULg; Henry, Valérie ULg

in Bulletin of the Belgian Mathematical Society Simon Stevin (2008), 15(1), 77-86

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See detailEnergy requirements for growth in young tortoises (Testudo hermanni boettgeri Mojsisovic 1889)
Justet, Delphine; Rotat, Christelle; Lhoest, Estelle et al

in Iben, C. (Ed.) Proceedings of the 12th ESVCN Congress (2008)

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See detailIconografia dannunziana. Il corpo "esposto" in fotografia
Dondero, Maria Giulia ULg

in Curreri, Luciano (Ed.) D'Annunzio come personaggio nell'immaginario italiano ed europeo (1938-2008). Una mappa (2008)

Cet article développe une étude sémiotique sur les représentations photographiques de Gabriele D’Annunzio et des personnes, artistes, acteurs ou amis, qui ont été une source d’inspiration pour ses travaux ... [more ▼]

Cet article développe une étude sémiotique sur les représentations photographiques de Gabriele D’Annunzio et des personnes, artistes, acteurs ou amis, qui ont été une source d’inspiration pour ses travaux littéraires, mais aussi pour ses activités d’homme politique. À partir d’un corpus d’images photographiques, j’ai étudié les iconographies du « corps-membrane » et du « corps-statue » en les liant à des postures passionnelles et éthiques telle la grâce et l’ostentation, afin de comparer cette iconographie avec les élaborations littéraires, fictionnelles et journalistiques de D’Annunzio. [less ▲]

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