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See detailJupiter’s polar auroral dynamics
Grodent, Denis ULg; Bonfond, Bertrand ULg

in AAS/Division for Planetary Sciences Meeting Abstracts (2014, November 01)

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be ... [more ▼]

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be discriminated by their temporal behaviour, where the narrowest parts of the main “oval” remain relatively stable over time periods of several hours, and the satellite footprints show large variability with timescales of minutes. Inside the main emission the so-called polar aurora, presumably corresponding to the polar cap mixing open and closed magnetic field lines, is characterized by rapid motions taking the form of swirls, giving rise to the “swirl region” and by intermittent brightenings in the “active region”. Coarse analysis of these motions suggests that they are too fast to respond to an equatorial magnetospheric forcing. Instead, they appear to be related to processes taking place in or above the ionosphere where distances travelled by plasma waves match those of the subtended auroral emission. Here, we present a preliminary improved analysis of the auroral motion in the polar region based on the application of an iterative “Advection Corrected Correlation Image Velocimetry” (ACCIV) method (Asay-Davis et al., 2009). This method allows one to build velocity fields quantifying local and overall auroral motions which may then be used to constrain their origin. [less ▲]

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See detailJupiter's polar auroral emissions
Grodent, Denis ULg; Clarke, J. T.; Waite, J. H. et al

in Journal of Geophysical Research. Space Physics (2003), 108(A10),

[1] This paper reports a study of Jupiter's polar auroral emissions observed in an extended series of FUV images. They were obtained on seven days, during winter 2000-2001, with the STIS camera on board ... [more ▼]

[1] This paper reports a study of Jupiter's polar auroral emissions observed in an extended series of FUV images. They were obtained on seven days, during winter 2000-2001, with the STIS camera on board the Hubble Space Telescope. The fixed pointing yielded highly accurate and consistent tracking of emisson features as Jupiter rotated, allowing the analysis of the auroral morphology and brightness on timescales ranging from seconds to days. In the Northern Hemisphere, the polar emissions, located poleward of the main oval, usually represent about 30% of the total auroral FUV emitted power. They show emission bursts lasting similar to100 s, while the main oval remains stable. The polar region may be divided into three regions apparently fixed in magnetic local time: the dawnside dark region, the poleward swirl region, and the duskside active region in which flares and arc-like features are observed. Each of these UV emission regions can be identified with its infrared counterpart and probably relates to a different sector of the Dungey cycle or Vasyliunas cycle plasma flows. [less ▲]

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See detailJupiter’s polar auroral emissions-signatures of magnetic reconnection
Radioti, Aikaterini ULg; Gérard, Jean-Claude ULg; Grodent, Denis ULg et al

Conference (2007, August 23)

The polar auroral emissions at Jupiter can be divided into three regions fixed in mag- netic local time: the dawnside dark region, the poleward swirl region and the duskside active region in which flares ... [more ▼]

The polar auroral emissions at Jupiter can be divided into three regions fixed in mag- netic local time: the dawnside dark region, the poleward swirl region and the duskside active region in which flares and arc-like features are observed. Previous studies re- lated the polar emissions to the solar wind driven Dungey cycle and Vasyliunas flow cycle. Based on HST STIS and ACS images we study extensively the time variations of the morphology and brightness of various polar auroral features as well as their duration and reoccurrence. We magnetically map their location in the equatorial plane and we compare their spatial size and time scales with the reconnection events taking place in the Jovian magnetotail. We discuss the possibility that some polar auroral features are signatures of magnetic reconnection. [less ▲]

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See detailJupiter's Polar Cap Aurora
Grodent, Denis ULg; Bonfond, Bertrand ULg

Scientific conference (2014, November 18)

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be ... [more ▼]

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be discriminated by their temporal behaviour, where the narrowest parts of the main “oval” remain relatively stable over time periods of several hours, and the satellite footprints show large variability with timescales of minutes. Inside the main emission the so-called polar aurora, presumably corresponding to the polar cap mixing open and closed magnetic field lines, is characterized by rapid motions taking the form of swirls, giving rise to the “swirl region” and by intermittent brightenings in the “active region”. Coarse analysis of these motions suggests that they are too fast to respond to an equatorial magnetospheric forcing. Instead, they appear to be related to processes taking place in or above the ionosphere where distances travelled by plasma waves match those of the subtended auroral emission. Here, we present a preliminary improved analysis of the auroral motion in the polar region based on the application of an iterative “Advection Corrected Correlation Image Velocimetry” (ACCIV) method (Asay-Davis et al., 2009). This method allows one to build velocity fields quantifying local and overall auroral motions which may then be used to constrain their origin. [less ▲]

Detailed reference viewed: 24 (1 ULg)
See detailJupiter's Thermospheric General Circulation Model (JTGCM): Equatorial thermal structure in comparison with Galileo probe measurements
Majeed, T.; Bougher, S. W.; Waite, J. H. et al

Poster (2001, June 25)

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See detailJupiter's ultraviolet polar auroral emissions
Coumans, Valérie ULg; Bonfond, Bertrand ULg; Grodent, Denis ULg et al

Conference (2009, September)

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See detailJupiter's ultraviolet polar emission: a statistical study
Coumans, Valérie ULg; Bonfond, Bertrand ULg; Grodent, Denis ULg et al

Conference (2010, September)

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See detailJurés de prix littéraires. Liens et figurations
Dozo, Björn-Olav ULg

Conference given outside the academic context (2013)

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See detailLa juridiction de l’Ordre de Cîteaux sur les communautés de la branche féminine aux Pays-Bas et dans la principauté de Liège : 15e-18e s.
Henneau, Marie-Elisabeth ULg

in Henneau, Marie-Elisabeth; Barrière, Bernadette; Bonis, Armelle (Eds.) et al Cîteaux et les femmes (2001)

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See detailJuridiction ordinaire et juridiction administrative en droit belge
Pâques, Michel ULg; Donnay, Luc ULg

in Chroniques de Droit Public = Publiekrechtelijke Kronieken (2007)

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See detailJuridiction ordinaire et juridiction administrative en droit belge
Pâques, Michel ULg; Donnay, Luc ULg

in Ben Salah, Hafedh; Ridha Jenayah, Mohamed (Eds.) La justice administrative dans les pays du Maghreb, la réception du modèle européen (2008)

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See detailLes juridictions d'instruction
Chichoyan, Daisy ULg

in Postal Memorialis (2007), J38

Etude systématique des juridictions d'instruction

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See detailJuridische professionals en herstelgerichte praktijken
Lauwaert, Katrien ULg

in Tijdschrift voor Herstelrecht (2009), 9(2), 8-22

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See detail“Jurilingüística : Las equivalencias interlingüísticas en Derecho »
Thiry, Bernard ULg

in Maria Rosa Álvarez Silva, Celia, Álvarez Moreno, Leonel Ruiz Miyaress (Ed.) Actas del XI Simposio Internacional de Comunicación Social (2009)

La communication proposée offre l'analyse des conclusions d'une expérience de terminologie juridique bilingue menées au travers d'une double publication : un dictionnaire juridique bilingue (français ... [more ▼]

La communication proposée offre l'analyse des conclusions d'une expérience de terminologie juridique bilingue menées au travers d'une double publication : un dictionnaire juridique bilingue (français - espagnol) de la Responsabilité civile et un ouvrage de synthèse sur la Terminologie et le Droit . Dans la ligne du titre du colloque, le Droit occupe un lieu significatif, puisque le problème d'intercompréhension qu'il pose consiste à établir les points d'équivalence possibles entre deux "mondes" (deux droits) par définition étrangers l'un à l'autre. Cette affirmation se fonde sur une analyse des domaines du savoir humain, orientée vers la démonstration de ce que le Droit entre, avec peu d'autres domaines, dans la catégorie de ceux qui n'ont pas de référent universel, ce qui, aux dires de certains, rend sa traduction prétendument impossible. Ensuite, la communication détaillera l'analyse des équivalences (et degrés de celles-ci) dont fait montre le dictionnaire cités ci-dessus, selon qu'il établit des catégories d'équivalence totale, d'équivalence partielle ou d'absence de toute équivalence possible. Cette analyse, avec tous les exemples illustratifs disponibles, cède alors le pas à plusieurs réflexions théoriques et conduit à proposer enfin une théorie de la traduction juridique :"qu'est-ce que traduire en droit?". [less ▲]

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See detailjurisprudence communautaire/Europese rechtspraak
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2014), 2014/4

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See detailJurisprudence communautaire/Europese rechtspraak
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2014), 2014/3

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See detailJurisprudence communautaire/Europese rechtspraak
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2014), 2014/2

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See detailJurisprudence communautaire/Europese rechtspraak
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2014), 2014/2

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See detailjurisprudence communautaire/Europese rechtspraak
Durviaux, Ann-Lawrence ULg

in Marchés et Contrats Publics = Overheidsopdrachten en -Overeenkomsten (2013), 2013/3

Detailed reference viewed: 6 (0 ULg)