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See detailConfigurations and Modulation Schemes Trade-off
Absil, Olivier ULg

in Lacoste, H. (Ed.) GENIE - DARWIN Workshop - Hunting for Planets (2003, March)

During the preliminary phase A of the Ground-based European Nulling Interferometer Experiment (GENIE), a number of interferometric configurations have been studied, in the cases of exozodiacal cloud and ... [more ▼]

During the preliminary phase A of the Ground-based European Nulling Interferometer Experiment (GENIE), a number of interferometric configurations have been studied, in the cases of exozodiacal cloud and hot Jupiter detection. Their expected performances have been computed in light of the measured or expected performances of the VLTI subsystems. A simple Bracewell nulling interferometer, formed of two Unit Telescopes and working in the L’ or N bands, has been identified as a good candidate configuration for exozodiacal cloud detection. External or internal chopping, fringe tracking and intensity matching will be critical issues for this configuration. In the case of hot Jupiter detection, a double Bracewell with internal modulation in the L’ band seems well appropriate, and should allow to carry out low resolution spectroscopy on a few bright exoplanets. The basic assumptions and computations which have lead to these candidate configurations are described in this paper. [less ▲]

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See detailConfigurations and modulation schemes trade-off (invited)
Absil, Olivier ULg

Scientific conference (2002, June 05)

During the preliminary phase A of GENIE, a number of interferometric configurations have been studied, in the cases of exo-zodiacal cloud and hot Jupiter detection. Their expected performances have been ... [more ▼]

During the preliminary phase A of GENIE, a number of interferometric configurations have been studied, in the cases of exo-zodiacal cloud and hot Jupiter detection. Their expected performances have been computed in light of the measured or expected performances of the VLTI sub-systems. A simple Bracewell nulling interferometer, formed of two Unit Telescopes and working in the L' or N bands, has been identified as a good candidate configuration for exo-zodiacal cloud detection. External or internal chopping, fringe tracking and amplitude matching will be critical issues for this configuration. In the case of hot Jupiter detection, a double Bracewell with internal modulation in the L' band seem well appropriate, and should allow to carry out low resolution spectroscopy on a few bright exoplanets. The basic assumptions and computations which have lead to these candidate configurations will be described in this talk. [less ▲]

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See detailLes configurations de risques comme approche de la résilience dans une étude longitudinale
Boët, S.; Born, Michel ULg

in Revue Québécoise de Psychologie (2001), 22(1), 93-116

Cette recherche s'inscrit dans le cadre d'une étude longitudinale des facteurs de risque et de protection en délinquance juvénile. Nous avons observé les pratiques éducatives de la mère ainsi que le ... [more ▼]

Cette recherche s'inscrit dans le cadre d'une étude longitudinale des facteurs de risque et de protection en délinquance juvénile. Nous avons observé les pratiques éducatives de la mère ainsi que le comportement de l'enfant de sa naissance à cinq ans. Nous avons pu mettre en évidence quatre configurations de risque familial qui s'avèrent contenir nombre des enfants les plus turbulents de notre échantillon. Cependant, ces configurations rassemblent aussi des enfants qui ne manifestent aucun trouble comportemental, ce sont des enfants que nous considérons comme résilients. [less ▲]

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See detailConfigurations institutionnelles de la protection de l’enfance: regards croisés de l’Afrique, de l’Europe et de l’Amérique du Nord
Wouango, Joséphine ULg; Turcotte, Daniel

in Revue Internationale Enfances Familles Générations (2013)

Cet article porte sur l’analyse de trois configurations institutionnelles de la protection de l’enfance : celle en place au Burkina Faso, en Belgique et au Québec. Pour chaque configuration, le texte ... [more ▼]

Cet article porte sur l’analyse de trois configurations institutionnelles de la protection de l’enfance : celle en place au Burkina Faso, en Belgique et au Québec. Pour chaque configuration, le texte explore les transformations qui ont marqué le passage de la prise en charge exclusive de l’enfant par la famille vers la présence accrue de l’État et la manière dont la Convention internationale des droits de l’enfant de 1989 a influencé ce passage. Il montre, au travers d’une lecture historique, que l’implication de l’État dans la protection des enfants a connu des formes et des modalités variables selon le temps et l’espace. L’approche actuelle en matière de protection de l’enfance au Nord et au Sud, approche largement inspirée de la perspective des droits, représente un défi tant pour les intervenants que pour les familles, car son application dépend à fois des ressources disponibles pour aider les enfants et les familles en difficulté, de la capacité d’action des institutions publiques et de l’efficacité des interventions. [less ▲]

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See detailConfigurations publiques de Dionysos dans le cadre de l'hellénisation de Rome
Caneva, Stefano ULg

in Pirenne, Vinciane; Bonnet, Corinne; Pironti, Gabriella (Eds.) Dieux des Grecs, dieux des Romains : panthéons en dialogue à travers l’histoire et l’historiographie (in press)

En 140/39 av. J.-C., une mission romaine composée, entre autres, de Scipion Emilien et du philosophe Panétios visita les alliés orientaux de Rome et se rendit notamment à Alexandrie. Le roi Ptolémée VIII ... [more ▼]

En 140/39 av. J.-C., une mission romaine composée, entre autres, de Scipion Emilien et du philosophe Panétios visita les alliés orientaux de Rome et se rendit notamment à Alexandrie. Le roi Ptolémée VIII y accueillit officiellement ces hôtes prestigieux, vêtu d’un habit étrange : un chiton long et subtil, dont les auteurs anciens réfèrent unanimement l’effet efféminé et caricatural, au point de susciter le rire des Romains et une condamnation du luxe effréné et décadent du royaume égyptien par comparaison avec la sobriété romaine. Il a fallu attendre une étude de H. Heinen en 1983 pour reconnaître, d’une part, l’envergure idéologique du lien entre la tenue de Ptolémée VIII – en fait empruntée à l’iconographie hellénistique de Dionysos – et la mise en scène officielle de la tryphè et du pouvoir royal et, de l’autre, le sens politique de la représentation caricaturale qu’en donna probablement déjà Panétios, représentation qui fut relayée et amplifiée par toute une tradition historiographique philo-romaine, qui se développa tout au long de la conquête romaine de la Méditerranée et ensuite à l’occasion du conflit entre Octavien et Antoine. Cette tradition nous a transmis, par le biais des auteurs de l’époque impériale, un discours fondé sur l’opposition entre Rome (et l’Italie), vertueuse source de citoyens et de soldats, et l’Orient dégénéré. Dans un tel cadre, Dionysos et le dionysisme sont sollicités pour servir à la construction d’un modèle accusatoire contre les ennemis de Rome, incarnant le désordre dans une dimension à la foi individuelle et institutionnelle. Mais est-ce que cette vision idéologique nous donne un portrait satisfaisant des rapports réels entre Rome et Dionysos / Bacchos / Liber Pater ? En partant de cette question, je propose dans ma contribution une approche visant à analyser, à l’aide de sources aussi littéraires que documentaires, les contextes de contact entre Rome et Dionysos de l’époque hellénistique au début du Principat, pour essayer de mettre en relief les relations entre, d’une part, la répulsion et le refus idéologiques du dionysisme, de l’autre les démarches d’appropriation et d’adaptation, à la culture romaine, de traits caractérisant les cultes hellénistiques de Dionysos et leurs utilisation dans la mise en forme des pratiques du pouvoir et de leurs représentations. [less ▲]

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See detailConfinement and cut-off: A model for the Pion Quark Distribution Function
Stassart, Pierre ULg; Bissey, F.; Cudell, Jean-René ULg et al

(2003)

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We ... [more ▼]

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We show that the introduction of non-perturbative effects, linked through a cut-off to the size of the pion, allows the reproduction of important features of the pion quark distribution function. [less ▲]

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See detailConfirmation and disconfirmation : Their social advantages
Leyens, J. P.; Dardenne, Benoît ULg; Yzerbyt, V. et al

in European Review of Social Psychology (1999)

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See detailConfirmation bias as a social skill
Dardenne, Benoît ULg; Leyens, J.

in Personality & Social Psychology Bulletin (1995), 21

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See detailConfirmation de la présence de Neospora caninum en Belgique
Poncelet, Luc; Bjerkas, I.; Charlier, G. et al

in Annales de Médecine Vétérinaire (1990)

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See detailConfirmation des effets délétères rénaux des AINS anti COX2 illustrée par trois cas cliniques
Piront, P.; Krzesinski, Jean-Marie ULg

in Acta Clinica Belgica (2002), 57(1), 35

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See detailConfirmation of a 2.3-DAY Periodicity in the Wolf-Rayet Star WR 134: a Twin of EZ Cma?
Morel, Thierry ULg; Marchenko, S. V.; Eenens, P. R. J. et al

in Cyclical Variability in Stellar Winds (1998)

Not Available

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See detailConfirmation of high cytokine clearance by hemofiltration with a cellulose triacetate membrane with large pores: an in vivo study
Delanaye, Pierre ULg; Lambermont, Bernard ULg; Dogné, Jean-Michel ULg et al

in International Journal of Artificial Organs (2006), 29(10), 944-948

Objective: To confirm in vivo the hypothesis that hemofiltration with a large pore membrane can achieve significant cytokine clearance. Method: We used a well-known animal model of endotoxinic shock (0.5 ... [more ▼]

Objective: To confirm in vivo the hypothesis that hemofiltration with a large pore membrane can achieve significant cytokine clearance. Method: We used a well-known animal model of endotoxinic shock (0.5 mg/kg of lipopolysaccharide from Escherichia Coli over a period of 30 mins). Six pigs were hemofiltrated for 3 hours with a large pore membrane (78 angstrom pore, 80 kDa cut off) (Sureflux FH 70, Nipro, Osaka, Japan). The ultrafiltration rate was 45 ml/kg/min. Samples were taken from arterial, venous line and in the ultrafiltrate at T120 and T240. We measured concentrations of interleukin 6, interleukin 10 and albumin. Results: At T120 and T240, the IL-6 clearances were 22 +/- 7 and 15 +/- 3 ml/min, respectively. The IL-6 sieving coefficients were 0.97 and 0.7 at T120 and T240, respectively. At T120 and T240, the IL-10 clearances were 14 +/- 4 and 10 +/- 7 ml/min, respectively. The sieving coefficients were 0.63 and 0.45 at T120 and T240, respectively. The concentrations of IL-6 and IL-10 were the same at T0 and T240. At T60 and T240, the plasmatic albumin concentrations were 24 +/- 4 g/L and 23 +/- 4 g/L, respectively ( p = 0.13). Conclusions: In this animal model of endotoxinic shock, we confirm the high cytokine clearance observed when hemofiltration is applied to a large pore membrane. The loss of albumin seems negligible. The impact of such clearances on hemodynamic stability and survival remains to be proved. [less ▲]

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See detailConfirmation of the existence of coherent orientations of quasar polarization vectors on cosmological scales
Hutsemekers, Damien ULg; Lamy, H.

in Astronomy and Astrophysics (2001), 367

In order to verify the existence of coherent orientations of quasars polarization vectors on very large scales, we have obtained new polarization measurements for a sample of quasars located in a given ... [more ▼]

In order to verify the existence of coherent orientations of quasars polarization vectors on very large scales, we have obtained new polarization measurements for a sample of quasars located in a given region of the three-dimensional Universe where the range of polarization position angles was predicted in advance. For this new sample, the hypothesis of uniform distribution of polarization position angles may be rejected at the 1.8% significance level on the basis of a simple binomial test. This result provides an independent confirmation of the existence of alignments of quasar polarization vectors on very large scales. In total, out of 29 polarized quasars located in this region of the sky, 25 have their polarization vectors coherently oriented. This alignment occurs at redshifts z =~ 1-2 suggesting the presence of correlations in objects or fields on Gpc scales. More global statistical tests applied to the whole sample of polarized quasars distributed all over the sky confirm that polarization vectors are coherently oriented in a few groups of 20-30 quasars. Some constraints on the phenomenon are also derived. Considering more particularly the quasars in the selected region of the sky, we found that their polarization vectors are roughly parallel to the plane of the Local Supercluster. But the polarization vectors of objects along the same line of sight at lower redshifts are not accordingly aligned. We also found that the known correlations between quasar intrinsic properties and polarization are not destroyed by the alignment effect. Several possible mechanisms are discussed, but the interpretation of this orientation effect remains puzzling. Based in part on observations collected at the European Southern Observatory (ESO, La Silla). [less ▲]

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See detailConfirmation of the magnetic oblique rotator model for the Of?p star HD 191612
Wade, G. A.; Howarth, I. D.; Townsend, R. H. D. et al

in Monthly Notices of the Royal Astronomical Society (2011), 416

This paper reports high-precision Stokes V spectra of HD 191612 acquired using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope, in the context of the Magnetism in Massive Stars ... [more ▼]

This paper reports high-precision Stokes V spectra of HD 191612 acquired using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope, in the context of the Magnetism in Massive Stars (MiMeS) Project. Using measurements of the equivalent width of the Hα line and radial velocities of various metallic lines, we have updated both the spectroscopic and orbital ephemerides of this star. We confirm the presence of a strong magnetic field in the photosphere of HD 191612, and detect its variability. We establish that the longitudinal field varies in a manner consistent with the spectroscopic period of 537.6 d, in an approximately sinusoidal fashion. The phases of minimum and maximum longitudinal field are, respectively, coincident with the phases of maximum and minimum Hα equivalent width and H[SUB]p[/SUB] magnitude. This demonstrates a firm connection between the magnetic field and the processes responsible for the line and continuum variability. Interpreting the variation of the longitudinal magnetic field within the context of the dipole oblique rotator model, and adopting an inclination i= 30° obtained assuming alignment of the orbital and rotational angular momenta, we obtain a best-fitting surface magnetic field model with obliquity β= 67°± 5° and polar strength B[SUB]d[/SUB]= 2450 ± 400 G. The inferred magnetic field strength implies an equatorial wind magnetic confinement parameter η[SUB]*[/SUB]≃ 50, supporting a picture in which the Hα emission and photometric variability have their origin in an oblique, rigidly rotating magnetospheric structure resulting from a magnetically channelled wind. This interpretation is supported by our successful Monte Carlo radiative transfer modelling of the photometric variation, which assumes the enhanced plasma densities in the magnetic equatorial plane above the star implied by such a picture, according to a geometry that is consistent with that derived from the magnetic field. Predictions of the continuum linear polarization resulting from Thompson scattering from the magnetospheric material indicate that the Stokes Q and U variations are highly sensitive to the magnetospheric geometry, and that expected amplitudes are in the range of current instrumentation. [less ▲]

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See detailConfirmative study of the effectiveness of thymopentin in active rheumatoid arthritis
Malaise, Michel ULg; Franchimont, P.; Hauwaert, Christian ULg et al

in Survey of Immunologic Research (1985), 4

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See detailConflagrations. La mosaïque du Coup de dés
Durand, Pascal ULg

in Belloi, Livio; Delville, Michel (Eds.) L’Œuvre en morceaux. Esthétiques de la mosaïque (2006)

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See detailLe conflit au Kurdistan et la diaspora kurde
Jamin, Jérôme ULg

Report (2001)

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See detailLe conflit dans l'état civil : l'envers du droit chez Thomas Hobbes
Herla, Anne ULg

Conference (2007, March 15)

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