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See detailAxions and polarisation of quasars
Payez, Alexandre ULg; Cudell, Jean-René ULg; Hutsemekers, Damien ULg

in AIP Conference Proceedings (2008), 1038

We present results showing that, thanks to axion-photon mixing in external magnetic fields, it is actually possible to produce an effect similar to the one needed to explain the large-scale coherent ... [more ▼]

We present results showing that, thanks to axion-photon mixing in external magnetic fields, it is actually possible to produce an effect similar to the one needed to explain the large-scale coherent orientations of quasar polarisation vectors in visible light that have been observed in some regions of the sky. [less ▲]

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See detailAxions et polarisation des quasars
Payez, Alexandre ULg

in Barillon, Pierre (Ed.) Journées Jeunes Chercheurs 2008 (2010)

[Français] Je présente rapidement l'objet de mes recherches et tente ensuite l'exercice consistant à exposer - le plus clairement possible - les idées et considérations physiques ayant amené à la ... [more ▼]

[Français] Je présente rapidement l'objet de mes recherches et tente ensuite l'exercice consistant à exposer - le plus clairement possible - les idées et considérations physiques ayant amené à la proposition de l'existence de l'axion. [less ▲]

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See detailAxions et polarisation des quasars
Payez, Alexandre ULg

Master's dissertation (2007)

Suite à l’observation de la polarisation de la lumière provenant de quasars, une tendance à l’alignement des vecteurs de polarisation de ces lointains objets fut détectée dans certaines régions du ciel ... [more ▼]

Suite à l’observation de la polarisation de la lumière provenant de quasars, une tendance à l’alignement des vecteurs de polarisation de ces lointains objets fut détectée dans certaines régions du ciel, celle-ci restant inexplicable par des effets locaux et semblant mettre en évidence l’existence de corrélations à très grande échelle, sur des distances cosmologiques. L’objet de ce travail, qui s’inscrit à l’interface entre la physique des particules et l’astrophysique, sera de se pencher sur ce problème et de déterminer dans quelle mesure l’existence d’un certain type de particules encore hypothétiques, nommées axions, pourrait permettre de rendre compte de ce phénomène ; les propriétés prédites pour celles-ci incluant un couplage (faible, mais les distances entrant en jeu étant très grandes, les effets de ce couplage pourraient malgré tout être observables) avec la lumière. [less ▲]

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See detailAxisymmetric transient modelling of a suction caisson in dense sand
Cerfontaine, Benjamin ULg; Levasseur, Séverine ULg; Collin, Frédéric ULg et al

in Hicks, Michael A.; Brinkgreve, Ronald, B.J.; Rohe, Alexander (Eds.) Numerical Methods in Geotechnical Engineering (2014)

Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation ... [more ▼]

Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is currently used for the modelling of their cyclic behaviour. It’s able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully- coupled transient axisymmetric analysis of a suction caisson is carried out. A vertical pseudo-random loading is transformed into equivalent ones. Comparison of the permanent displacement accumulated shows a good agreement between them. The influence of the interface conditions is also addressed. For low tension amplitude applied to the caisson, it can be modelled as “stuck” to the inner soil. However higher amplitude might lead to a total unplugging. [less ▲]

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See detailAxisymmetric transient modelling of a wind turbine foundation in cohesionless soil using the Prevost’s model
Cerfontaine, Benjamin ULg; Levasseur, Séverine ULg; Charlier, Robert ULg

in Computational Methods in Marine Engineering (2013)

Suction caissons are more and more used for offshore foundations. This paper deals with the cyclic modelling of suction caissons using the Prevost's model. The case study is a 8m large diameter embedded ... [more ▼]

Suction caissons are more and more used for offshore foundations. This paper deals with the cyclic modelling of suction caissons using the Prevost's model. The case study is a 8m large diameter embedded in dense No. 0 Lund sand. Parameters for the model are calibrated using drained triaxial tests. A parametric study concerning the influence of the constitutive law, the skirt length and permeability is carried out. [less ▲]

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See detailAyahuasca et Iboga: secte et néo-chamanisme
Collart, Anne-Françoise ULg

Conference (2008, June 17)

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See detailAz emlőbesugárzásnál alkalmazott tangenciális mezők multiszegmentálásával javiitható a céltérfogat dózis-homogenitása
GULYBAN, Akos ULg; Bellyei, Szabolcs; Farkas, Robert et al

in Magyar Onkologia (2005), 45(265), 2005

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See detailAz energiaegyensúly zavarának hatása a méh involúciójára és a ciklikus petefészek működésére tejhasznú tehenekben]
Könyves, L.; Brydl, E.; Jurkovich, V. et al

in Proceedings: 5th Middle-European Buiatrics Congress (2004)

The aim of the study was to evaluate the effect of energy imbalance (manifested increased blood NEFA) on reactivation of the ovaries, uterine involution and the incidence of retained placenta and ... [more ▼]

The aim of the study was to evaluate the effect of energy imbalance (manifested increased blood NEFA) on reactivation of the ovaries, uterine involution and the incidence of retained placenta and endometritis [less ▲]

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See detailAz MR-képalkotással vezérelt prostata-brachytherapia metodikai tervezése
LAKOSI, Ferenc ULg; Antal, Gergely; Vandulek, Csaba et al

in Magyar Radiologia (2007), 81(5-6), 224-229

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See detailDe Aziatische Duizendknopen: samenvatting fiche beheer
Delbart, Emmanuel ULg; Mahy, Grégory ULg; OBV

Learning material (2012)

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See detailAzidothymidine as a potential modifier of radiation-reponse
Copaceanu, M-L; COUCKE, Philippe ULg; Cottin, E et al

in Acta Oncologica (1995)

Abstract The potential effect of AZT as a thymidine analogue on radiation response in vitro was investigated. Two human cell lines (WiDr and HeLa) were used. The effect of 10 μM AZT on exponentially ... [more ▼]

Abstract The potential effect of AZT as a thymidine analogue on radiation response in vitro was investigated. Two human cell lines (WiDr and HeLa) were used. The effect of 10 μM AZT on exponentially growing cells was studied after different exposure times (24, 48 and 72 h). The surviving fraction (clonogenic assay) or metabolic activity (MTT assay) after irradiation of AZT-exposed cells, was compared to unexposed irradiated controls. Flow cytometry was used to assess the cell-cycle effect of pre-exposure of exponentially growing cells to AZT. AZT had a radioprotective effect for all experimental time points as far as WiDr was concerned. For HeLa the effect was significant at 24 h. Cell-cycle analysis showed a significant accumulation in S-phase at 72 h for WiDr. For HeLa there was a significant accumulation in S-phase at 48 h. We conclude that under the reported experimental conditions, AZT as a thymidine analogue seems to reduce the cytotoxic effect of irradiation. [less ▲]

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See detailAzione, testualizzazione, notazione
Dondero, Maria Giulia ULg

in Espressione e contenuto. Rivista on-line dell'AISS Associazione Italiana di Studi Semiotici (2014, October)

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See detailThe Aznalcóllar disaster: An in-depth PIXE study of the pirite mine spill of 1998
Calvo Del Castillo, Helena ULg; Ruvalcaba Sil, Jose Luis; Álvarez, M. A. et al

Poster (2007)

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See detailL'azote minéral du sol en 2000-2001 sous froment d'hiver
Herman, Jean-Luc; Destain, Jean-Pierre ULg; Goffart, Jean-Pierre et al

in Livre Blanc: Céréales - Gembloux (2001, February)

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See detailL'azote minéral du sol en 2001-2002 sous froment d'hiver
Bodson, Bernard ULg; Destain, Jean-Pierre ULg; Vancutsem, Françoise ULg et al

in Livre Blanc: Céréales - Gembloux (2002, February 27)

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