References of "2005"
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See detailHigh-Order, High-Frequency Methods for Wave Scattering I, II and III
Geuzaine, Christophe ULg

Scientific conference (2005, November 07)

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See detailSéance d'information sur les mémoires (Présentation Powerpoint)
Simons, Germain ULg; Delville, Michel ULg

Diverse speeche and writing (2005)

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See detailCultures de la qualité des services et cultures de l'accompagnement dans le secteur de l'éducation des jeunes enfants : essai de théorisation
Pirard, Florence ULg

Doctoral thesis (2005)

La thèse se présente comme un essai de théorisation des conceptions de la qualité des services et de leur accompagnement dans le secteur de l'éducation des jeunes enfants. Elle appréhende celles-ci sous ... [more ▼]

La thèse se présente comme un essai de théorisation des conceptions de la qualité des services et de leur accompagnement dans le secteur de l'éducation des jeunes enfants. Elle appréhende celles-ci sous le prisme de cultures, marquant le caractère construit de l'objet de recherche. Inspirée des méthodologies de la théorisation ancrée, elle propose deux approches complémentaires. La première interroge les usages de la notion de qualité dans les recherches sur l'éducation des jeunes enfants de manière à la fois diachronique et internationale ainsi que la référence à l'accompagnement dans les publications récentes parues en sciences de l'éducation et de la formation. La deuxième approche consiste à analyser les conceptions de la qualité des services et de leur accompagnement dans des débats menés dans des dispositifs de formation que l'auteure a elle-même mis en place. [less ▲]

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See detailVers une démarche structurée de gestion forestière intégrée et participative
Rondeux, Jacques ULg

Learning material (2005)

This paper is aiming at presenting the main guidelines of a structured approach to an integrated forest management. Such a type of management that can be defined as being a concerted multipurpose ... [more ▼]

This paper is aiming at presenting the main guidelines of a structured approach to an integrated forest management. Such a type of management that can be defined as being a concerted multipurpose management takes into account numerous objectives that forest should be able to fulfil as well as the opinions of the actors involved in the forestry world. This approach consists of an evaluation and a subsequent multicriteria comparison of possible management alternatives. These management options and the expected consequences of their application on the future forest in terms of structure, composition and ability to meet all the expectations must be analyzed. In this respect scenario modellings are built, using simulations that suppose a good and very large knowledge of species autecology, site quality, level of biological quality. Various criteria and indicators are then used to assess the capacity of each alternative to achieve each defined and concerted objective. This is the starting point for comparisons between the management alternatives, based on the multicriteria decision-making technique, the so called ELECTRE III. This promising method has been tested in the context of a belgian pilot forest covering nearly 800 hectares in which foresters, private and public forest owners, hunters, naturalists, walkers and some other stakeholders are deeply involved. [less ▲]

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See detailAn O(1) Solver for the Helmholtz Equation
Geuzaine, Christophe ULg

Scientific conference (2005, November 04)

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See detailAssessing the effects of compositional heterogeneity on phylogenomic analyses
Baurain, Denis ULg; Beiko, Robert G.; Ragan, Mark A.

Conference (2005, November 04)

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See detailModulation of intestinal urea cycle by dietary spermine in suckling rat
Gharbi, Myriam ULg; Powroznik, Brigitte; Mazzucchelli, Gabriel ULg et al

in Biochemical and Biophysical Research Communications (2005), 336(4), 1119-1124

Argininosuccinate synthetase, an ubiquitous enzyme in mammals, catalyses the formation of argininosuccinate, the precursor of arginine. Arginine is recognised as an essential amino acid in foetuses and ... [more ▼]

Argininosuccinate synthetase, an ubiquitous enzyme in mammals, catalyses the formation of argininosuccinate, the precursor of arginine. Arginine is recognised as an essential amino acid in foetuses and neonates, but also as a conditionally essential amino acid in adults. Argininosuccinate synthetase is initially expressed in enterocytes during the developmental period, it disappeared from this organ then appeared in the kidneys. Although the importance of both intestinal and renal argininosuccinate synthetases has been recognised for a long time, nutrients have not yet been identified as inducers of the gene expression. In the context of a proteomic screening of intestinal modifications induced by dietary spermine in suckling rats, we showed that argininosuccinate synthetase and carbamoyl phosphate synthase disappeared from enterocytes after this treatment. The disappearance of argininosuccinate synthetase in small intestine was confirmed by immunodetection. Expression of carbamoyl phosphate synthase and argininosuccinate synthetase coding genes decreased also after spermine administration. Expression of other urea cycle enzyme coding genes was modulated by spermine administration: argininosuccinate lyase decreased and arginase increased. Our results fit with the developmental variation of argininosuccinate synthetase and carbamoyl phosphate synthase. Modulation of the gene expression for several urea cycle enzymes suggests a coordination between all the pathway steps and switch toward polyamine (or proline and glutamate) biosynthesis from ornithine. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailFrançais de Belgique et travaux belges dans le TLF
Boutier, Marie-Guy ULg

Scientific conference (2005, November 04)

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See detailMédecine familiale et approche communautaire
Vanmeerbeek, Marc ULg

Conference (2005, November 02)

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See detailSignature of Saturn's auroral cusp: Simultaneous Hubble Space Telescope FUV observations and upstream solar wind monitoring
Gérard, Jean-Claude ULg; Bunce, Emma J; Grodent, Denis ULg et al

in Journal of Geophysical Research. Space Physics (2005), 110

Model simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn's dayside cusp regions is not capable of producing significant FUV aurora. Instead, they suggested the ... [more ▼]

Model simulations by Bunce et al. (2005a) have shown that direct precipitation of electrons in Saturn's dayside cusp regions is not capable of producing significant FUV aurora. Instead, they suggested the possibility that the FUV bright emissions sometimes observed near noon are associated with reconnection occurring at the dayside magnetopause, possibly pulsed, analogous to flux transfer events seen at the Earth. Pulsed reconnection at the low-latitude dayside magnetopause when the IMF is directed northward (antiparallel to Saturn's magnetic field lines) is expected to give rise to pulsed twin-vortical flows in the magnetosphere and hence to bipolar field-aligned currents centered in the vortical flows closing in ionospheric Pedersen current. In the case of southward IMF and high-latitude lobe reconnection the model predicts that the vortical flows are displaced poleward of the open-closed field line boundary with reversed field-aligned currents compared with the former case. During January 2004, a unique campaign took place during which magnetic field and plasma instruments on board the Cassini-Huygens spacecraft measured the in situ solar wind and embedded interplanetary magnetic field while the Hubble Space Telescope simultaneously observed the far ultraviolet aurora in Saturn's southern hemisphere. The IMF was highly structured during this interval. The electric potential at Cassini is estimated from solar wind magnetic field and velocity measurements for the case of low-latitude or lobe reconnection. We show that a dayside FUV signature of intense electron precipitation is found poleward of or along the main oval during a period of minor compression period when the dayside reconnection voltage is estimated to be ~30-100 kV. Overall, we find that the conceptual model of Bunce et al. (2005a) provides a good estimate of the UV brightness and power for the case of northward IMF but somewhat underestimates the power for the southward IMF case, except if the speed of the vortical flow is larger than its value in the nominal model. [less ▲]

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See detailA survey for gamma-ray emission from OB associations with INTEGRAL: some preliminary results
Leyder, Jean-Christophe ULg; Rauw, Grégor ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

Recent studies indicated that there might be a correlation between OB associations and unidentified gamma-ray sources from the 3EG catalogue. Moreover, when extrapolating the fluxes measured by EGRET at ... [more ▼]

Recent studies indicated that there might be a correlation between OB associations and unidentified gamma-ray sources from the 3EG catalogue. Moreover, when extrapolating the fluxes measured by EGRET at energies higher than 100 MeV with a power-law down to the energy range of ISGRI, the expected count rates should be large enough to be detected with INTEGRAL. As most of these OB associations are located within the Galactic plane, they are being observed by INTEGRAL as part of the Core Program (CP) during both the Galactic Plane Scans (GPS) and the Galactic Center Deep Exposure (GCDE). Combining public and CP data, we have performed a survey for gamma-ray emission from OB associations and the first results are presented in this paper. [less ▲]

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See detailA spectroscopic investigation of the young open cluster IC 1805
De Becker, Michaël ULg; Rauw, Grégor ULg

in Rauw, Grégor; Nazé, Yaël; Blomme, R. (Eds.) et al Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We present the main results of a spectroscopic campaign devoted to the O-type stars in the young open cluster IC 1805. This study aims at the investigation of the multiplicity and the line profile ... [more ▼]

We present the main results of a spectroscopic campaign devoted to the O-type stars in the young open cluster IC 1805. This study aims at the investigation of the multiplicity and the line profile variability of its brightest massive members. We present new results concerning the line profile variability of He II 4686 and H-beta for HD 15570 and HD 15629. For these two stars, our radial velocity analysis does not reveal any variations compatible with a binary motion. We also significantly improve the orbital parameters of the long period binary HD 15558. For this latter system, we present for the first time evidence for the detection of the secondary, leading to spectral types of O5.5 and O7 respectively for the two components. [less ▲]

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See detailEffect of dynamic left ventricular dyssynchrony on dynamic mitral regurgitation in patients with heart failure due to coronary artery disease
LANCELLOTTI, Patrizio ULg; STAINIER, Pierre-Yves ULg; LEBOIS, Florence ULg et al

in American Journal of Cardiology (2005), 96(9), 1304-1307

In patients with heart failure, exercise-induced increases in mitral regurgitation (MR), which convey a poor prognosis, are related to the dynamic distortion of mitral valve geometry. It was hypothesized ... [more ▼]

In patients with heart failure, exercise-induced increases in mitral regurgitation (MR), which convey a poor prognosis, are related to the dynamic distortion of mitral valve geometry. It was hypothesized that dynamic MR may also be related to intermittent changes in left ventricular synchronicity during exercise. (c) 2005 Elsevier Inc. All rights reserved. [less ▲]

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See detailThe young open cluster NGC 6231: five years of investigations
Sana, H.; Rauw, Grégor ULg; Gosset, Eric ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

In this contribution, we present an overview of the main results obtained by the Liège multiwavelength (in the X-ray and optical domains) campaign on the young open cluster NGC 6231. We probe the ... [more ▼]

In this contribution, we present an overview of the main results obtained by the Liège multiwavelength (in the X-ray and optical domains) campaign on the young open cluster NGC 6231. We probe the distribution of the O star properties, and especially their binary nature. In this regard, we revise the O-type binary fraction and we briefly discuss the distribution of the binary parameters. We then present the latest developments of the canonical L[SUB]X[/SUB]-L[SUB]bol[/SUB] relation. We discuss the causes of the observed deviations from this relation and of the X-ray variability among O-type stars. Probing the population of low mass pre-main sequence stars detected in the X-ray domain, we propose a scenario for the star formation history in NGC 6231. [less ▲]

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See detailCPD-41° 7742: an unusual wind interaction
Sana, H.; Gosset, Eric ULg; Rauw, Grégor ULg et al

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We summarize the results of a multiwavelength observing campaign on the massive eclipsing binary CPD-41° 7742, another remarkable object in the young open cluster NGC 6231. Our campaign relies on high ... [more ▼]

We summarize the results of a multiwavelength observing campaign on the massive eclipsing binary CPD-41° 7742, another remarkable object in the young open cluster NGC 6231. Our campaign relies on high resolution echelle spectroscopy, narrow-band optical photometry, and XMM-Newton X-ray observations. Combined with the spectroscopic analysis, the light curve analysis provides a direct measurement of the masses and sizes of the system components. However, the most outstanding results come from the XMM observations. Our 180 ks campaign towards NGC 6231, and CPD-41° 7742, provides an unprecedented phase coverage of such a close early-type binary. The EPIC-MOS light curves almost fully cover the 2.4 day period of the system and the brightness of the object is sufficient to yield a time resolution as tight as 1 ks. The X-ray flux presents clear variations along the orbit, that we interpret as the signature of an unusual wind interaction. We indeed expect that, in this O+B system, the dominant primary wind crashes into the secondary surface, leading to a wind-photosphere interaction. As a strong support to our interpretation, we provide a geometrical model that associates an extra X-ray emission to the secondary inner surface. Though quite simple, the present model matches the main features of the X-ray light curve. [less ▲]

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See detailPreliminary results of an observational campaign aiming at the study of the binary system LSS3074
Gosset, Eric ULg; Rauw, Grégor ULg; Manfroid, Jean ULg et al

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We present preliminary results of an observational campaign aiming at the study of the binary system LSS3074. A new lightcurve clearly indicates that the system is in contact. Recent spectroscopy broadly ... [more ▼]

We present preliminary results of an observational campaign aiming at the study of the binary system LSS3074. A new lightcurve clearly indicates that the system is in contact. Recent spectroscopy broadly confirms the previous results and the rather low masses of both components (O4f[SUP]+[/SUP] and O6-7:(f):). We further analyse an XMM-Newton observation of the object that indicates a rather hard X-ray spectrum. This is partly due to the high interstellar extinction towards the object but also to the high plasma temperature (kT Ë 1.2-1.3 keV). [less ▲]

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See detailAre WC9 Wolf-Rayet stars in colliding-wind binaries?
Williams, P. M.; van der Hucht, K. A.; Rauw, Grégor ULg

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

We present results from a spectroscopic search for massive companions to dust-making Galactic WC9 stars as a step to testing the paradigm that dust formation in these systems requires colliding winds to ... [more ▼]

We present results from a spectroscopic search for massive companions to dust-making Galactic WC9 stars as a step to testing the paradigm that dust formation in these systems requires colliding winds to produce over densities. We find evidence for OB companions to the WC9 stars WR 59 and WR 65, but not WR 121 or WR 117. We identify lines of N III-V and possibly N II in the spectrum of WR 88, one of the few Galactic WC9 stars which do not make circumstellar dust, and suggest that WR 88 is a transitional WN--WC9 object and less evolved than the other WC9 stars. On the other hand, the possible identification of a strong emission line at 4176 in the spectrum of WR 117 with Ne I suggests that this star is more evolved than other WC9 stars studied. [less ▲]

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See detailThe peculiar Of?p stars HD 108 and HD 191612
Nazé, Yaël ULg; Rauw, Grégor ULg; Walborn, N. R. et al

in Massive Stars and High-Energy Emission in OB Associations (2005, November 01)

The Of?p spectral category was introduced by Walborn in 1972 to describe peculiar stars which possess intense emission lines of C III 4647,4650,4651. Recently, two of them, HD 108 and HD 191612, were ... [more ▼]

The Of?p spectral category was introduced by Walborn in 1972 to describe peculiar stars which possess intense emission lines of C III 4647,4650,4651. Recently, two of them, HD 108 and HD 191612, were found to display spectacular line profile variations in the visible domain: these stars apparently alternate between two different spectral states (O6-O8). To discover the origin of this intriguing behaviour, a multiwavelength campaign was undertaken. In this context, the analysis of the X-ray emission is especially important since it provides crucial information for constraining the nature of these peculiar objects and testing conflicting models. We are therefore carrying out high-quality XMM-Newton observations of these stars and we present the results of the data obtained up to now. [less ▲]

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