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See detailJovian Auroral Lyalpha Self-Reversals: A Window on Jupiter's Auroral Electrojet?
Gladstone, G. R.; Waite, J H, Jr; Gérard, Jean-Claude ULg

in Bulletin of the American Astronomical Society (1998, September 01)

High-resolution GHRS profiles of Lyalpha lines emitted from Jupiter's auroral regions were presented by Prang{e} et al. (Astrophys. J., 484, L169--L173, 1997). Their data show asymmetric self-reversed ... [more ▼]

High-resolution GHRS profiles of Lyalpha lines emitted from Jupiter's auroral regions were presented by Prang{e} et al. (Astrophys. J., 484, L169--L173, 1997). Their data show asymmetric self-reversed line profiles, with the blue or red peak brighter depending on the target location in Jupiter's northern auroral region. The measured asymmetries are equivalent to Doppler velocities towards and away from the observer of several km/s. As suggested by Sommeria et al. (Icarus, 119, 2--24, 1995), electrojet velocities of ~ 10--20 km/s may be present at Jupiter. Here we investigate the possibility that the observed wavelength shifts of the auroral Lyalpha line are a result of multiple scattering by H atoms carried along in Jupiter's auroral electrojet. If this explanation is found to be viable, then HST/STIS mapping of the velocity shifts in the Lyalpha line may represent (as with ground-based high-resolution observations of jovian auroral H_3(+) emission lines) a means for determining the dynamics of Jupiter's upper atmosphere and ionosphere. [less ▲]

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See detailJovian auroral spectroscopy with FUSE: analysis of self-absorption and implications for electron precipitation
Gustin, Jacques ULg; Feldman, Paul D.; Gérard, Jean-Claude ULg et al

in Icarus: International Journal of Solar System Studies (2004), 171(2), 336-355

High-resolution (similar to 0.22 Angstrom) spectra of the north jovian aurora were obtained in the 905-1180 Angstrom window with the Far Ultraviolet Spectroscopic Explorer (FUSE) on October 28, 2000. The ... [more ▼]

High-resolution (similar to 0.22 Angstrom) spectra of the north jovian aurora were obtained in the 905-1180 Angstrom window with the Far Ultraviolet Spectroscopic Explorer (FUSE) on October 28, 2000. The FUSE instrument resolves the rotational structure of the H-2 spectra and the spectral range allows the study of self-absorption. Below 1100 Angstrom, transitions connecting to the upsilon" less than or equal to 2 levels of the H-2 ground state are partially or totally absorbed by the overlying H2 molecules. The FUSE spectra provide information on the overlying H2 column and on the vibrational distribution of H-2. Transitions from high-energy H-2 Rydberg states and treatment of self-absorption are considered in our synthetic spectral generator. We show comparisons between synthetic and observed spectra in the 920-970, 1030-1080, and 1090-1180 Angstrom spectral windows. In a first approach (single-layer model), the synthetic spectra are venerated in a thin emitting layer and the emerging photons are absorbed by a layer located above the source. It is found that the parameters of the single-layer model best fitting the three spectral windows are 850, 800, and 800 K respectively for the H-2 gas temperature and 1.3 x 10(18), 1.5 x 10(20), and 1.3 x 10(20) cm(-2) for the H-2 self-absorbing vertical column respectively. Comparison between the H-2 column and a 1-D atmospheric model indicates that the short-wavelength FUV auroral emission originates from just above the homopause. This is confirmed by the high H-2 rovibrational temperatures, close to those deduced from spectral analyses of H-3(+) auroral emission. In a second approach, the synthetic spectral generator is coupled with a vertically distributed 3 energy degradation model, where the only input is the energy distribution of incoming electrons (multi-layer model). The model that best fits globally the three FUSE spectra is a sum of Maxwellian functions, with characteristic energies ranging from 1 to 100 keV, giving rise to an emission peak located at 5 mubar, that is similar to 100 km below the methane homopause. This multi-layer model is also applied to a re-analysis of the Hopkins Ultraviolet Telescope (HUT) auroral spectrum and accounts for the H2 self-absorption as well as the methane absorption. It is found that no additional discrete soft electron precipitation is necessary to fit either the FUSE or the HUT observations. (C) 2004 Elsevier Inc. All rights reserved. [less ▲]

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See detailJovian ion energy spectra - Ion stochastic acceleration by Alfven waves
Radioti, Aikaterini ULg; Krupp, N.; Woch, J. et al

Conference (2005)

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See detailJovian thermal structure inferred from the energy degradation of auroral electrons
Grodent, Denis ULg; Gérard, Jean-Claude ULg; Waite, J. H.

in Bulletin of the American Astronomical Society (1999, October 10)

A one--dimensional model has been developed to investigate the links between auroral heat input and the atmospheric temperature and composition structure of Jupiter. Different energy distributions are ... [more ▼]

A one--dimensional model has been developed to investigate the links between auroral heat input and the atmospheric temperature and composition structure of Jupiter. Different energy distributions are used to evaluate the importance of the energy spectrum of the incident electrons for the thermal balance of Jupiter's auroral thermosphere. Radiative cooling by H_3(+) and hydrocarbon (CH_4, C_2H_2) and downward conduction are calculated to solve the heat conduction equation. The values of observable quantities such as the altitude of the H_2 emission peak, infrared (IR) and ultraviolet (UV) emissions and temperatures associated with H_2 and H_3(+) optical signatures are used to constrain the parameters of the auroral electron energy distributions. From these simulations, it appears that the precipitated auroral energy is not able to directly provide the necessary heat to balance the hydrocarbon cooling below the homopause. It is suggested however that the auroral upper stratosphere is warmer than the equatorial upper stratosphere measured by Galileo. A Maxwellian energy distribution with a total flux of 20 ergs cm(-2) s(-1) and a characteristic energy of 22 keV added to a soft Maxwellian component of 1 erg cm(-2) s(-1) and 350 eV produces results in good agreement with thermospheric observations. [less ▲]

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See detailJovian thermal structure inferred from the energy degradation of auroral electrons.
Grodent, Denis ULg; Gérard, Jean-Claude ULg; Waite, J H, Jr

in Bulletin of the American Astronomical Society (1999)

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See detailLa joyeuse rentrée de l'eLearning
Verpoorten, Dominique ULg

Article for general public (2013)

Message clé : il faut s'intéresser aux moocs pour les chances et les menaces dont ils sont porteurs MAIS ils ne représentent pas le tout de l'eLearning

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See detailJPEG 2000
Van Droogenbroeck, Marc ULg

Learning material (2001)

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See detailJuan Gabriel Vásquez: découvrir pourquoi ce qui est obscur continue de l'être
Vanden Berghe, Kristine ULg

Article for general public (2014)

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See detailJuan José Saer, comentador de las versiones del Ulises
Willson, Patricia ULg

in Barnabé, Jean-Philippe; Vegh, Beatriz (Eds.) Proust y Joyce en ámbitos rioplatenses (2007)

The interpretation of the Spanish translations of Joyce’s Ulysses made by the Argentine writer Juan José Saer is the starting point for the elaboration of a series of topics related to literary import in ... [more ▼]

The interpretation of the Spanish translations of Joyce’s Ulysses made by the Argentine writer Juan José Saer is the starting point for the elaboration of a series of topics related to literary import in general and translation in Argentina in particular. In the first place, the influence exercised by the early versions of canonical literary texts in a specific literature; in the second place, the defence of the own dialectal variety when evaluating a translation. Finally, the view on a golden age of translation in Argentina is addressed, which implies not only to evaluate Santiago Rueda’s publishing project –where José Salas Subirat’s Ulysses was first published− during the 1940s, but also the reception of its translations among young artists and writers during the 1960s. [less ▲]

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See detailJuan Luis Vives, Introductio ad Sapientiam. Satellitium sive Symbola. Epistolae duae de ratione studii puerilis
Adam, Renaud ULg

in De Schepper, Marcus; Kelders, Ann; Pauwels, Jan (Eds.) In de ban van boeken. Grote verzamelaars uit de negentiende eeuw in de Koninklijke Bibliotheek van België (2008)

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See detailJuan Ramon Jiménez: vie et oeuvre d'un Prix Nobel
Dechêne, Antoine ULg

Article for general public (2011)

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See detailLes jubés dans les édifices religieux du Hainaut (1535-1650) : inventaire, typologie et fonctions
Joly, Emmanuel ULg

Conference (2013, November 08)

Au cours des XVIe et XVIIe siècles, un grand nombre d’édifices religieux du Comté de Hainaut se dotent d’un ouvrage d’art, appelé jubé ou doxal, séparant le chœur de la nef. Disparus pour la plupart au ... [more ▼]

Au cours des XVIe et XVIIe siècles, un grand nombre d’édifices religieux du Comté de Hainaut se dotent d’un ouvrage d’art, appelé jubé ou doxal, séparant le chœur de la nef. Disparus pour la plupart au XVIIIe siècle et dans les siècles qui suivirent, on ignore souvent l’importance que les jubés revêtaient pour l’organisation spatiale de l’édifice religieux, la pratique liturgique et musicale. Après avoir fait le point sur la littérature qui leur est consacrée, on précisera les questions méthodologiques que pose ce type d’objet pour l’histoire de l’art et l’histoire de la musique. Ensuite nous tenterons de réaliser l’inventaire des jubés connus pour le Hainaut, d’en préciser la typologie, la chronologie et les usages. A travers cette analyse, il s’agira finalement de lancer des pistes de réflexion afin de mieux comprendre la place que les jubés occupaient pour la pratique musicale au sein des édifices religieux du Hainaut. [less ▲]

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See detailLe Jubilé
Delfosse, Annick ULg

Scientific conference (2012, July 11)

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See detailEen jubilerend oud maar schoon paard
Vromans, Joseph ULg

in Gerritsen, Marinel (Ed.) Taalverandering in Nederlandse dialekten. Honderd jaar dialekt-vragenlijsten 1879-1979 (1979)

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See detailJUDE: A Far-UV Imager for JUICE
Grodent, Denis ULg; Bunce, Emma; Bannister, Nigel et al

Poster (2011, August 31)

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See detailThe Judgement of the European Court of Justice in VEBIC:Filling a Gap in Regulation 1/2003
Petit, Nicolas ULg

in Journal of European Competition Law and Practice (2011)

In VEBIC, the Court of Justice of the EU clarifies the prerogatives of National Competition Authorities under Regulation 1/2003 and paves the way towards regulatory reform in Belgium

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See detailThe Judgment of the European Court of Justice in VEBIC: Filling a Gap in Regulation 1/2003
Petit, Nicolas ULg

in Journal of European Competition Law & Practice (2011), 2(4), 340-344

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See detailJudicial Independence Conference
Sibony, Anne-Lise ULg

Conference (2011, June 24)

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See detailJudicial Remedies Under EC Competition Law: Complex Issues Arising from the Modernization Process
Petit, Nicolas ULg; Geradin, Damien

in Fordham Corporate Law (2005)

Article 230 EC allows any natural or legal person to institute proceedings against a decision addressed to that person or against a decision which, although in the form of a regulation or a decision ... [more ▼]

Article 230 EC allows any natural or legal person to institute proceedings against a decision addressed to that person or against a decision which, although in the form of a regulation or a decision addressed to another person, is of direct and individual concern to the former . Private parties thus frequently rely on this provision to challenge acts adopted by the European Commission (hereafter the Commission ) in accordance with the powers granted to it in the field of competition law. While this particular subject has generated extensive scholarly analysis, the last decade of reforms of EC competition law often cited as the modernisation process makes it particularly necessary to re-examine this topic. Two major developments in the field of competition law give rise to novel and complex questions with regard to judicial review pursuant to Article 230 EC. First, the reforms introduced by virtue of the modernisation of the implementation of EC competition rules have generated a proliferation of new acts whose legal character (and therefore by implication the possibility to challenge these new acts before the European Court of Justice hereafter, the ECJ and the Court of First Instance hereafter, the CFI ) is not necessarily clear. This is the case, for example, of the multitude of soft law instruments (notices, guidelines, etc.) which the Commission adopted with a view to clarifying its decisional practice, as well as new binding acts envisaged by Regulation 1/2003 such as findings of inapplicability and decisions to remove a case from a National Competition Authority. Second, the increased emphasis on the use of economic analysis following the successive reforms of the rules pertaining to horizontal and vertical agreements and merger control has transformed competition law into a technically complex subject matter whereby economists are stealing a lead over lawyers. The corollary of this development could be to limit the scope of judicial review exercised by generalist EC and national courts. Indeed, faced with having to make complex evaluations involving the weighing up of anti-competitive restrictions and efficiency gains, the generalist judge could quickly find himself lost. Therefore, the more opaque and complex a particular case is, the wider the Commission s discretion in its decision making becomes. Certain recent judgments of the CFI concerning the annulment of Commission prohibition decisions in merger control, however, put this danger into perspective. Apart from the above-mentioned developments, it is equally worth highlighting the proliferation of litigation running in parallel to annulment actions. Such litigation calls for, first and foremost, a re-examination and revision of the fines imposed by the Commission under Articles 81 and 82 EC. Subsequent to successful annulment actions, such litigation also encompasses actions for compensation of the losses incurred by the firm(s) subjected to unlawful Commission decisions. The recent case Holcim v. Commission or the request lodged by Mytravel after the Airtours judgment illustrate the development of such litigation in the field of competition law. Against this background, the developments that follow intend to provide a critical analysis of annulment actions against Commission decisions in the field of competition law in the aftermath of the modernisation process. This study is made up of seven parts. Part II identifies those acts that can be the subject of an annulment action within the meaning of Article 230 EC. Part III reviews and analyses the rules laying down who is entitled to initiate an annulment action. Part IV recalls the modalities for an annulment action. Part V evokes the parallel actions (revision of fines) and subsequent actions for indemnity following an annulment action. Part VI evaluates the effectiveness of the Community annulment action procedure in the light of the principles laid down by the CFI and ECJ as regards judicial review. Part VII provides a brief conclusion. [less ▲]

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