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See detailPoints to consider for the development of new indications for hormone replacement therapies and estrogen-like molecules
Stevenson, JC; GASPARD, Ulysse ULg; Avouac, B et al

in Climacteric : The Journal of the International Menopause Society (1998), 1

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See detailPoints, chiffres et lettres: la critique des images selon Harun Farocki
Hamers, Jérémy ULg

Conference (2010, April 30)

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See detailLes points-clés de la gestion financière des PMEs familiales
Van Caillie, Didier ULg

in Donckels, Rik (Ed.) Pleins feux sur les PME : de la théorie au vécu du terrain (1993)

This chapter proposes a complete overview of the key elements that characterize an efficient financial management in familly businesses. It proposes a synthesis of the main findings coming from the series ... [more ▼]

This chapter proposes a complete overview of the key elements that characterize an efficient financial management in familly businesses. It proposes a synthesis of the main findings coming from the series of empirical researches conducted by the KMO StudieCentrum in Brussels and the "Centre de Recherche PME" in Liège with the funding of the King Baudouin Foundation between 1988 and 1993. [less ▲]

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See detailPointwise smoothness of space-filling functions
Jaffard, S.; Nicolay, Samuel ULg

in Applied & Computational Harmonic Analysis (2009), 26(2), 181-199

We study irregularity properties of generic Peano functions: we apply these results to the determination of the pointwise smoothness of a Peano function introduced by Lebesgue and of some related ... [more ▼]

We study irregularity properties of generic Peano functions: we apply these results to the determination of the pointwise smoothness of a Peano function introduced by Lebesgue and of some related functions, showing that they are either monoholder or multifractal functions. We test on these examples several numerical variants of the multifractal formalism, and we show how a change of topology on R can affect the Holder regularity of such functions. (C) 2008 Elsevier Inc. All rights reserved. [less ▲]

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See detailLes poisons de flèches africains I. Zaire (Congo), Rwanda et Burundi
Angenot, Luc ULg

in Africa-Tervuren (1978), 24(2), 36-54

The study of arrow poisons is a vast subject, involving many different sciences, among them ethnology, botany, chemistry and pharmacology. Afetr an introduction and a critical study of the literature ... [more ▼]

The study of arrow poisons is a vast subject, involving many different sciences, among them ethnology, botany, chemistry and pharmacology. Afetr an introduction and a critical study of the literature referring to arrow poisons from Cental Africa, the author has described the notes about herbarium samples kept in the Botanic Graden of Belgium at Meise. Then, he has stated his chemical study on well-identified poisoned arrows preserved in the Royal Museum of Central Africa at Tervuren.From all these data, the author has been able to plot a map showing the geographic distribution of the main poisons used in Zaïre ( Congo-RDC), Rwanda and Burundi. Finally , this publication also demonstrates the great benefit that poisons can provide to organic chemists and pharmacologists in the never-ending search for new and better drugs. [less ▲]

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See detailLes Poissons de la Marchette (Eau d'Heure)
Philippart, Jean-Claude ULg; Rimbaud, Gilles ULg

Conference given outside the academic context (2011)

Après un bref rappel des principales caractéristiques hydroécologiques de la Marchette et du R. d’Heure, est présentée une analyse des résultats de deux pêches à l’électricité exécutées pour le compte du ... [more ▼]

Après un bref rappel des principales caractéristiques hydroécologiques de la Marchette et du R. d’Heure, est présentée une analyse des résultats de deux pêches à l’électricité exécutées pour le compte du SPW-DGARNE-DEMNA en juin 2010 dans la Marchette aval, dans le camp militaire. Ces résultats sont confrontés à ceux obtenus lors d’études réalisées par l’ULg en 1976-1979. Les captures en 2010 sur une distance de 392 m et une superficie de 0,2211 ha s’élèvent à 3 949 poissons et 16,625 kg (densité de 17 860 ind./ha et 75,2 kg/ha) appartenant à 17 espèces indigènes. Près de 94,2 % des captures en nombre (58,8 % en biomasse) sont formés par 3 espèces (vairon, loche franche et goujon) de petite taille (< 18 cm) et assez peu exigeantes pour la qualité de l’eau et du milieu physique (espèces ubiquistes et polluorésistantes). La présence de l’épinoche en effectif assez important reflète un état de pollution chronique. Les poissons indicateurs d’un meilleur niveau de qualité de l’eau sont représentés mais en faibles effectifs et biomasses par des cyprins d’eau vive (chevaine, vandoise, ablette spirlin ainsi que barbeau et hotu moins nombreux), par la truite commune de rivière toutefois très rare et provenant surtout de repeuplements et, fait encourageant, par deux espèces Natura 2000, le chabot et la petite lamproie. Il faut aussi signaler la capture de carnassiers représentés en faible effectif par le brochet, la perche fluviatile et l’anguille européenne. L’interprétation de ces résultats nécessite de distinguer les trois milieux bien différenciés que sont le R. d’Heure (RE) de bonne qualité écologique, la Marchette en amont du RE fort dégradée (= masse d’eau fortement modifiée selon la Directive Cadre sur l’Eau) et la Marchette en aval du RE de qualité moyenne (effet du mélange). Il faut aussi tenir compte du fait que les cours d’eau famenniens sont naturellement peu favorables (faible pente + courant lent + substrat faiblement caillouteux) au développement des Salmonidés (truite, ombre) et des autres poissons pondeurs sur gravier (barbeau, chabot). Enfin, les repeuplements (diversité et intensité) en poissons d’élevage influencent aussi la composition de la communauté des poissons. Dans la Marchette aval étudiée en 2010, on trouve une bonne diversité piscicole (17 espèces) mais la communauté d’une ‘zone à barbeau’ présente d’importants déséquilibres structurels résultant de la pollution de l’eau venant de l’amont (Indice biotique Invertébrés benthiques souvent mauvais=8/20 en 1996-2008). Les Indices de qualité de l’eau d’après les poissons varient de ‘médiocre’ à ‘moyen/bon’ selon les méthodes et les lieux. La biomasse piscicole totale est nettement (3-4 fois) inférieure à ce qu’elle devrait être dans ce type de rivière en l’absence de pollution. En matière de gestion durable de la qualité écologique et piscicole des milieux quelques propositions générales peuvent être formulées : * Accorder une priorité absolue à l’amélioration de la qualité de l’eau par des actions sur la Marchette en amont du R. d’Heure (contrôle des rejets, épuration) sans négliger le R. d’Heure lui-même * Améliorer l’habitat physique des poissons (notamment frayères et nurseries pour le brochet) et développer des opérations appropriées de repeuplement (truite fario, cyprins d’eau vive, civelles). * Préserver et, si nécessaire, rétablir la libre circulation des poissons en remontée dans le bassin Marchette/R. d’Heure et encadrer les éventuels projets hydro-électriques [less ▲]

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See detailPoissons migrateurs : objectif Meuse.
Hanon, L.; Philippart, Jean-Claude ULg; Poncin, Pascal ULg

Article for general public (2007)

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See detailPolar lipids analysis from the MFGM by SPE and HPLC-ELSD
Bodson, Pascal ULg; Danthine, Sabine ULg; Blecker, Christophe ULg et al

Poster (2008, January 23)

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See detailPolar Microoganisms and Biotechnology
Feller, Georges ULg; Margesin, Rosa

in Miller, R. V.; Whyte, L. G. (Eds.) Polar Microbiology: Life in a Deep Freeze (2012)

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See detailPolar overdominance at the ovine callipyge locus
Cockett, N.; Jackson, S.; Shaw, T. et al

in Science (1996), 273(5272), 236-238

An inheritable muscular hypertrophy was recently described in sheep and shown to be determined by the callipyge gene mapped to ovine chromosome 18. Here, the callipyge phenotype was found to be ... [more ▼]

An inheritable muscular hypertrophy was recently described in sheep and shown to be determined by the callipyge gene mapped to ovine chromosome 18. Here, the callipyge phenotype was found to be characterized by a nonmendelian inheritance pattern, referred to as polar overdominance, where only heterozygous individuals having inherited the callipyge mutation from their sire express the phenotype. The possible role of parental imprinting in the determinism of polar overdominance is envisaged. [less ▲]

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See detailPolar stratospheric descent of NOy and CO and Arctic denitrification during winter 1992-1993
Rinsland, C. P.; Salawitch, R. J.; Gunson, M. R. et al

in Journal Of Geophysical Research. Atmospheres (1999), 104(D1), 1847-1861

Observations inside the November 1994 Antarctic stratospheric vortex and inside the April 1993 remnant Arctic stratospheric vortex by the Atmospheric Trace Molecule Spectroscopy (ATMOS) Fourier transform ... [more ▼]

Observations inside the November 1994 Antarctic stratospheric vortex and inside the April 1993 remnant Arctic stratospheric vortex by the Atmospheric Trace Molecule Spectroscopy (ATMOS) Fourier transform spectrometer are reported. In both instances, elevated volume mixing ratios (VMRs) of carbon monoxide (CO) were measured. A peak Antarctic CO VMR of 60 ppbv (where 1 ppbv = 10(-9) per unit volume) was measured at a potential temperature (Theta) of 710 K (similar to 27 km), about 1 km below the altitude of a pocket of elevated NOy (total reactive nitrogen) at a deep minimum in N2O (<5 ppbv). The Arctic observations also show a region of elevated vortex CO with a peak VMR of 90 ppbv at 630-670 K (similar to 25 km) but no corresponding enhancement in NOy, perhaps because of stronger dynamical activity in the northern hemisphere polar winter and/or interannual variability in the production of mesospheric NO. By comparing vortex and extravortex observations of NOy obtained at the same N2O VMR, Arctic vortex denitrification of 5 +/- 2 ppbv at 470 K (similar to 18 km) is inferred. We show that our conclusion of substantial Arctic winter 1992-1993 denitrification is robust by comparing our extravortex observations with previous polar measurements obtained over a wide range of winter conditions. Correlations of NOy with N2O measured at the same Theta by ATMOS in the Arctic vortex and at midlatitudes on board the ER-2 aircraft several weeks later lie along the same mixing line. The result demonstrates the consistency of the two data sets and confirms that the ER-2 sampled fragments of the denitrified Arctic vortex following its breakup, An analysis of the ATMOS Arctic measurements of total hydrogen shows no evidence for significant dehydration inside the vortex. [less ▲]

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See detailA polar+equatorial wind model for broad absorption line quasars. I. Fitting the C IV BAL profiles
Borguet, Benoît ULg; Hutsemekers, Damien ULg

in Astronomy and Astrophysics (2010), 515

Context. Despite all the studies, the geometry of the wind at the origin of the blueshifted broad absorption lines (BAL) observed in nearly 20% of quasars still remains a matter of debate. <BR /> Aims: We ... [more ▼]

Context. Despite all the studies, the geometry of the wind at the origin of the blueshifted broad absorption lines (BAL) observed in nearly 20% of quasars still remains a matter of debate. <BR /> Aims: We want to see if a two-component polar+equatorial wind geometry can reproduce the typical BAL profiles observed in these objects. <BR /> Methods: We built a Monte Carlo radiative transfer code (called MCRT) to simulate the line profiles formed in a polar+equatorial wind in which the photons, emitted from a spherically symmetric core are resonantly scattered. Our goal is to reproduce typical C iv line profiles observed in BAL quasars and to identify the parameters governing the line profiles. <BR /> Results: The two-component wind model appears to be efficient in reproducing the BAL profiles from the P Cygni-type profiles to the more complex ones. Some profiles can also be reproduced with a pole-on view. Our simulations provide evidence of a high-velocity rotation of the wind around the polar axis in BAL quasars with non P Cygni-type line profiles. [less ▲]

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See detailPolar-interferometry: what can be learnt from the IOTA/IONIC experiment
Le Bouquin, Jean-Baptiste; Rousselet-Perraut, Karine; Berger, Jean-Philippe et al

in Schöller, Markus; Danchi, William; Delplancke, Françoise (Eds.) Optical and Infrared Interferometry (2008, July 01)

We report the first near-IR polar-interferometric observations, performed at the IOTA array using its integrated optics combiner IONIC. Fringes have been obtained on calibration stars and resolved late ... [more ▼]

We report the first near-IR polar-interferometric observations, performed at the IOTA array using its integrated optics combiner IONIC. Fringes have been obtained on calibration stars and resolved late-type giants. Optical modeling of the array and dedicated laboratory measures allowed us to confirm the good accuracy obtained on the calibrated polarized visibilities and closure phases. However, no evidences for polarimetric features at high angular resolution have been detected. The simulations and the results presented here open several perspectives for polar-interferometry, especially in the context of fibered, single-mode combiners. [less ▲]

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See detailPolarimetric Standard Stars Observed with FORS1 at ESO-VLT
Mason, E.; Bagnulo, S.; Szeifert, T. et al

in ASP Conference Series (2005, December 01), 343

A Paranal Observatory project aims to analyze all the polarimetric standard stars in use at FORS1 to both check they have a constant polarization signal and measure the instrumental polarization ... [more ▼]

A Paranal Observatory project aims to analyze all the polarimetric standard stars in use at FORS1 to both check they have a constant polarization signal and measure the instrumental polarization. Preliminary results for 3 standards in the FORS1 calibration plans are presented. [less ▲]

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See detailPolarimetry and Spectropolarimetry of a Sample of Broad Absorption Line Quasars
Lamy, H.; Hutsemekers, Damien ULg

in Structure and Kinematics of Quasar Broad Line Regions. ASPC 175 (1999)

Optical polarimetric and spectropolarimetric observations of a sample of broad absorption line QSOs were recently carried out with the 3.6m telescope and EFOSC1 in La Silla, Chile. Some preliminary ... [more ▼]

Optical polarimetric and spectropolarimetric observations of a sample of broad absorption line QSOs were recently carried out with the 3.6m telescope and EFOSC1 in La Silla, Chile. Some preliminary results are presented here with emphasis on interesting correlations between polarization and other quantities characterizing the optical spectra of the objects. [less ▲]

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See detailPolarised light induced birefringence in azo dye doped polymer: a new model and polarised holographic experiments
Blanche, Pierre-Alexandre ULg; Lemaire, P. C.; Maertens, Christophe et al

in Optics Communications (1997), 139(1-3), 92-98

The photoinduced birefringence of azo dye DMNPAA (2,5-dimelthyl-4-(p-nitrophenylazo)anisole) in PVK (Poly(N-vinylcarbazole)) thin film is reported. A two-layer model of the film is proposed to take into ... [more ▼]

The photoinduced birefringence of azo dye DMNPAA (2,5-dimelthyl-4-(p-nitrophenylazo)anisole) in PVK (Poly(N-vinylcarbazole)) thin film is reported. A two-layer model of the film is proposed to take into account the different results obtained in photoinduced birefringence experiments. According to this model, the sample exhibits intrinsic birefringence but the absorbed light can induce orientation of the optically active molecules contained in the first layer of the film, lending to photoinduced birefringence. Holographic experiments have been carried out in this media with recording at 514 nm and readout at 633 nm. Diffraction efficiency versus polarisation shows that these polymers can record polarisation states as well as intensity patterns. [less ▲]

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See detailA polarity reversal in the large-scale magnetic field of the rapidly rotating sun HD 190771
Petit, Pascal; Dintrans, Boris; Morgenthaler, Audrey et al

in Astronomy and Astrophysics (2009), 508

Aims. We investigate the long-term evolution of the large-scale photospheric magnetic field geometry of the solar-type star HD 190771. With fundamental parameters very close to those of the Sun except for ... [more ▼]

Aims. We investigate the long-term evolution of the large-scale photospheric magnetic field geometry of the solar-type star HD 190771. With fundamental parameters very close to those of the Sun except for a shorter rotation period of 8.8 d, HD 190771 provides us with a first insight into the specific impact of the rotation rate in the dynamo generation of magnetic fields in 1 M_sun stars. Methods: We use circularly polarized, high-resolution spectra obtained with the NARVAL spectropolarimeter (Observatoire du Pic du Midi, France) and compute cross-correlation line profiles with high signal-to-noise ratio to detect polarized Zeeman signatures. From three phase-resolved data sets collected during the summers of 2007, 2008, and 2009, we model the large-scale photospheric magnetic field of the star by means of Zeeman-Doppler imaging and follow its temporal evolution. Results: The comparison of the magnetic maps shows that a polarity reversal of the axisymmetric component of the large-scale magnetic field occurred between 2007 and 2008, this evolution being observed in both the poloidal and toroidal magnetic components. Between 2008 and 2009, another type of global evolution occured, characterized by a sharp decrease of the fraction of magnetic energy stored in the toroidal component. These changes were not accompanied by significant evolution in the total photospheric magnetic energy. Using our spectra to perform radial velocity measurements, we also detect a very low-mass stellar companion to HD 190771. [less ▲]

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See detailPolarization and Intensity Effects on the Beam-Foil-Laser Interaction
Bastin, Thierry ULg; Krastev, T.; Garnir, Henri-Pierre ULg et al

Poster (1995)

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