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See detailForbidden FeIII-lines in celestial spectra
Edlén, B.; Swings, Polydore ULg

in Observatory (The) (1939), 62

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See detailThe forbidden line spectrum in the edges of H II regions
Manfroid, Jean ULg

in Astrophysics & Space Science (1977), 48

It is shown analytically that the motion of exciting stars can affect the forbidden emission-line spectra of H II regions in an observable manner. A model is used which comprises a small solid angle of a ... [more ▼]

It is shown analytically that the motion of exciting stars can affect the forbidden emission-line spectra of H II regions in an observable manner. A model is used which comprises a small solid angle of a spherical nebula that is symmetric with respect to the direction of stellar motion and consists of a mixture of H, He, C, N, O, and Ne with ionization states up to He II, C III, N III, O III, and Ne III. Consideration is given to the case of a 36-solar-mass O5 star with an effective temperature of 43,000 K moving at a velocity of 10 km/s in a nebula having a density of 10 times the proton mass per cu cm. The results obtained indicate that: (1) the region where forbidden lines characteristic of ionization fronts are produced is broadened considerably at the trailing edge of the nebula; (2) the spectrum in this region is comparable to that of fossil H II regions; and (3) the ionization front at the leading edge is sharper, the temperature there is higher, and the forbidden-line spectrum is similar to that of young ionization fronts. [less ▲]

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See detailForbidden Lines in 6pk (j=1-5) configurations
Biémont, Emile ULg; Quinet, Pascal ULg

in Physica Scripta (1996), 54

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See detailForbidden Lines in 6pk (k=1-5) configurations
Biémont, Emile ULg; Quinet, Pascal ULg

Conference (1995)

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See detailForbidden lines in a newly formed H II region
Manfroid, Jean ULg

in Astronomy and Astrophysics (1975), 43

The initial evolution of a spherically symmetric H II region forming around a star of 36 solar masses is calculated numerically using a program based on a finite-difference scheme extrapolated from those ... [more ▼]

The initial evolution of a spherically symmetric H II region forming around a star of 36 solar masses is calculated numerically using a program based on a finite-difference scheme extrapolated from those previously proposed for solving hydrodynamic problems involving shock waves. The helium abundance is assumed to be 10 per cent, and no account is taken of magnetic fields, turbulent motions, or interstellar grains. The evolution of the positions of the hydrogen and helium ionization fronts is plotted as a function of time, and the total spectra of the forbidden emission lines of C II, N II, N III, O II, O III, Ne II, and Ne III are computed at each time. The intensities of the 29 strongest lines at five different epochs are compared with a rough estimate of the total strength of H-beta. The temporal evolution of the nebula and the emission lines is described qualitatively. [less ▲]

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See detailForbidden lines of CrII, Ni II, and Fe II
Swings, Polydore ULg

in Publications of the Astronomical Society of the Pacific [=PASP] (1944), 56

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See detailForbidden lines of ionized nickel in the spectra of bright-line stars
Swings, Polydore ULg

in Publications of the Astronomical Society of the Pacific [=PASP] (1943), 55

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See detailForbidden oxygen lines in comets at various heliocentric distances
Decock, Alice ULg; Jehin, Emmanuel ULg; Hutsemekers, Damien ULg et al

in Astronomy and Astrophysics (2013), 555

We present a study of the three forbidden oxygen lines [OI] located in the optical region - i.e., 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in order to better understand ... [more ▼]

We present a study of the three forbidden oxygen lines [OI] located in the optical region - i.e., 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in order to better understand the production of these atoms in cometary atmospheres. The analysis is based on 48 high-resolution and high signal-to-noise spectra collected with UVES at the ESO VLT between 2003 and 2011 referring to 12 comets of different origins observed at various heliocentric distances. The flux ratio of the green line to the sum of the two red lines is evaluated to determine the parent species of the oxygen atoms by comparison with theoretical models. This analysis confirms that, at about 1 AU, H[SUB]2[/SUB]O is the main parent molecule producing oxygen atoms. At heliocentric distances >2.5 AU, this ratio changes rapidly, an indication that other molecules are starting to contribute. The most abundant species after H[SUB]2[/SUB]O in the coma, CO and CO[SUB]2[/SUB], are good candidates, and the ratio is used to estimate their abundances. We found that the CO[SUB]2[/SUB] abundance relative to H[SUB]2[/SUB]O in comet C/2001 Q4 (NEAT) observed at 4 AU can be as high as ~70%. The intrinsic widths of the oxygen lines were also measured. The green line is on average about 1 km s[SUP]-1[/SUP] broader than the red lines, while the theory predicts that the red lines are broader. This might be due to the nature of the excitation source or to a contribution of CO[SUB]2[/SUB] as the parent molecule of the 5577.339 Å line. At 4 AU, we found that the width of the green and red lines in comet C/2001 Q4 are the same, which could be explained if CO[SUB]2[/SUB] becomes the main contributor to the three [OI] lines at high heliocentric distances. Based on observations made with ESO Telescope at the La Silla Paranal Observatory under programs ID 268.C-5570, 270.C-5043, 073.C-0525, 274.C-5015, 075.C-0355, 080.C-0615, 280.C-5053, 086.C-0958, and 087.C-0929. [less ▲]

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See detailForbidden transitions in Fe II
Quinet, Pascal ULg; Le Dourneu, M; Zeippen, C J

in Proceedings of the 5th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas (1996)

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See detailForbidden transitions of Astrophysical Interest in the 5pk (k=1-5) Configurations
Biémont, Emile ULg; Hansen, J. E.; Quinet, Pascal ULg et al

in Astronomy and Astrophysics. Supplement Series (1995), 111

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See detailForbidding Bodies: Avatars of the Phisical in the Work of Janet Frame
Delrez, Marc ULg

Conference (2002, April 23)

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See detailForbidding Bodies: Avatars of the Physical in the Work of Janet Frame
Delrez, Marc ULg

in World Literature Written in English (2004), 38(2), 70-79

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See detailLa force du mi-dit : Figures de style dans le roman de Lawrence Scott, Witchbroom
Pagnoulle, Christine ULg

in Palimpsestes (2005), 16

Beyond some obvious comparisons, the article traces the function of some embedded metaphors, and the kind of problem they may raise in a translation.

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See detailForce Limiting at CSL premises
Grodent, Christophe ULg; Cucchiaro, Antonio ULg; ronchain, philippe

(2001, June)

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See detailForce musculaire isocinétique du couple quadriceps / ischio-jambiers des joueurs de rugby professionnels
Julia, Marc; Pereira, B.; Morand, D. et al

in Résumés des communications orales SFTS (2012, October)

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See detailLa force persuasive de l'Idéo-graphie
Leclercq, Bruno ULg

Conference (2010, April 17)

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See detail- La force probante de la preuve irrégulièrement recueillie : Antigone aurait-elle perdu son âme ?
Jacobs, Ann ULg

in Saint-Pau, Jean Christophe; Bergeaud, Aurélie (Eds.) La preuve pénale – Problèmes contemporains en droit comparé (2012)

Jurisprudence belge en matière de preuve illégale et irrégulière.

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See detailForced Saving, Redistribution, and Nonlinear Social Security Schemes
Cremer, Helmuth; De Donder, Philippe; Maldonado, Dario et al

in Southern Economic Journal (2009), (76), 86-98

This paper studies the design of nonlinear social security schemes when individuals differ in productivity and in their degree of myopia. Myopic individuals may not save ‘‘enough’’ for their retirement ... [more ▼]

This paper studies the design of nonlinear social security schemes when individuals differ in productivity and in their degree of myopia. Myopic individuals may not save ‘‘enough’’ for their retirement. The welfare function is paternalistic: The rate of time preference of the farsighted is used for both types. We show that the solution does not necessarily imply forced savings for the myopics: Paternalistic considerations are mitigated by incentive effects. Numerical results suggest that as the proportion of myopic individuals increases, there is less redistribution and more forced saving, and the desirability of social security increases. [less ▲]

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See detailForcer l'avenir, alliances innovantes pour le développement durable - Écologie industrielle
Sartor, Kevin ULg; Huysmans, Hélène ULg; Corman, Marjorie

Conference given outside the academic context (2012)

En préparation au sommet Rio + 20, les étudiants du master en sciences de gestion à finalité en Management des entreprises sociales de l'Université de Liège organisent un colloque le 27 avril sur le thème ... [more ▼]

En préparation au sommet Rio + 20, les étudiants du master en sciences de gestion à finalité en Management des entreprises sociales de l'Université de Liège organisent un colloque le 27 avril sur le thème des alliances innovantes pour le développement durable. Quatre pistes seront évoquées, soit: - Alliance producteurs- consommateurs - Ecologie industrielle - Emplois verts et inclusion sociale - Organisations et dispositifs supports Les ministres de l'Economie, Jean-Claude Marcourt, et du Développement Durable, Jean-Marc Nollet seront présents. [less ▲]

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See detailForcer, cadrer, confisquer le débat. Réflexions sur les médias européens et le discours eurofédéraliste
Geuens, Geoffrey ULg

Conference given outside the academic context (2014)

Detailed reference viewed: 36 (22 ULg)