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See detailInstability strips of main sequence B stars: a parametric study of iron enhancement
Miglio, Andrea ULg; Bourge, P.-O.; Montalban Iglesias, Josefa ULg et al

in Communications in Asteroseismology (2007), 150

The discovery of beta Cephei stars in low metallicity environments, as well as the difficulty to theoretically explain the excitation of the pulsation modes observed in some beta Cephei and SPB stars ... [more ▼]

The discovery of beta Cephei stars in low metallicity environments, as well as the difficulty to theoretically explain the excitation of the pulsation modes observed in some beta Cephei and SPB stars, suggest that the iron opacity ``bump'' provided by standard models could be underestimated. We investigate, by means of a parametric study, the effect of a local iron enhancement on the location of the beta Cephei and SPB instability strips. [less ▲]

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See detailInstability strips of slowly pulsating B stars and beta Cephei stars: the effect of the updated OP opacities and of the metal mixture
Miglio, Andrea ULg; Montalban Iglesias, Josefa ULg; Dupret, Marc-Antoine ULg

in Monthly Notices of the Royal Astronomical Society (2007), 375

The discovery of beta Cephei stars in low-metallicity environments, as well as the difficulty in theoretically explaining the excitation of the pulsation modes observed in some beta Cephei and hybrid ... [more ▼]

The discovery of beta Cephei stars in low-metallicity environments, as well as the difficulty in theoretically explaining the excitation of the pulsation modes observed in some beta Cephei and hybrid slowly pulsating B-beta Cephei pulsators, suggest that the `iron opacity bump' provided by stellar models could be underestimated. We analyze the effect of uncertainties in the opacity computations and in the solar metal mixture on the excitation of pulsation modes in B-type stars. We carry out a pulsational stability analysis for four grids of main-sequence models with masses between 2.5 and 12M[SUB]solar[/SUB] computed with OPAL and OP opacity tables and two different metal mixtures. We find that in a typical beta Cephei model the OP opacity is 25 per cent larger than OPAL in the region where the driving of pulsation modes occurs. Furthermore, the difference in the Fe mass fraction between the two metal mixtures considered is of the order of 20 per cent. The implication on the excitation of pulsation modes is non-negligible: the blue border of the slowly pulsating B star (SPB) instability strip is displaced at higher effective temperatures, leading to a larger number of models being hybrid SPB-beta Cephei pulsators. Moreover, higher overtone p-modes are excited in beta Cephei models and unstable modes are found in a larger number of models for lower metallicities, in particular beta Cephei pulsations are also found in models with Z = 0.01. [less ▲]

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See detailInstallations fixes soumises à permis d'urbanisme en Région wallonne
Delnoy, Michel ULg

in Immobilier (2001), 1

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See detailL'instance arbitrale et le temps
Caprasse, Olivier ULg

in Saletti, A.; van Compernolle, J.; van Drooghenbroeck, J.-F. (Eds.) L'arbitre et le juge étatique - Etudes de droit comparté à la mémoire de Giuseppe Tarzia (2014)

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See detailL'instauration d'un seuil électoral de 5% en Belgique: analyse critique du raisonnement de la Cour constitutionnelle
Onclin, François ULg

in Revue de la Faculté de Droit de l'Université de Liège (2011), (3-4), 569-573

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See detailL'instauration et les effets du seuil électoral de 5%
Onclin, François ULg

in Courrier Hebdomadaire du CRISP (2009), (2041-2042),

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See detailInstituants et prix culturels, Québec, 1919-1939 : histoire culturelle et base de données
Dozo, Björn-Olav ULg; Lacroix, Michel; Lapointe, Olivier

E-print/Working paper (2012)

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See detailLa institución como metáfora del discurso. Análisis discursivo de la polémica en torno a 'Mundo Nuevo'
Vanden Berghe, Kristine ULg

in De Paepe, C.; Lie, N.; Rodríguez, L. (Eds.) et al Literatura y poder (1995)

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See detailL'institut de Chimie Générale de l'Université de Liège
Spring, Walthère ULg

Book published by Auguste Bernard (1894)

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See detailL'Institut de Droit Européen fait appel aux avocats
Kohl, Benoît ULg; Dal, G.A.; Philippe, D.

in La Tribune du Barreau (2013)

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See detailL’institution imaginaire de la Belgique résiduelle
Verjans, Pierre ULg

in Revue Nouvelle (2008), (n°4 - avril 2008), 76-80

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See detail"Une institution nommée Baillon"
Demoulin, Laurent ULg

in Les Nouveaux Cahiers André Baillon (2010), 7-8

A Liège, une institution psychiatrique porte le nom de l'écrivain belge André Baillon. Quelle est cette institution et quel lien entretient-elle avec l'écrivain?

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See detailInstitutional Change and Legislative Stability: Explicit and Contested Decision-Making in the EU Council (1995-2010)
Van Aken, Wim ULg

E-print/Working paper (2012)

In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the ... [more ▼]

In contrast to general expectations the growth of EU membership as well as European treaty reform has not had any significant impact on the Council’s overall legislative and roll call activity. On the basis of a new dataset representing the total population of public roll calls and recorded votes in the Council this paper explains why the EU Council has been so successful in guaranteeing legislative and roll call stability between 1995 and 2010. The quantitative and qualitative analysis finds that frontloading legislation, changing voting behaviour, reinforcement of existing coalition patterns and the successful adjustment of newer Member States to the EU Council have contributed to the EU Council’s decision-making capacity during the observed 16 years. In explaining the apparent contradiction between institutional change and the Council’s legislative stability this paper contributes to our knowledge of the functioning, the decision-making processes and the geography of contestation in the EU Council. [less ▲]

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See detailInstitutional Investors, Information Asymmetry, Stock Market Liquidity
Sougné, Danielle ULg; Aymen, Ajina; Faten, Lakhal

in International Journal of Managerial Finance (in press), 11

Purpose. The purpose of this study is to examine the effect of institutional investors ownership and activism on information asymmetry and stock market liquidity in France. Design/methodology/approach ... [more ▼]

Purpose. The purpose of this study is to examine the effect of institutional investors ownership and activism on information asymmetry and stock market liquidity in France. Design/methodology/approach. Our sample includes 162 French-listed firms over a period ranging from 2007 to 2009. Our methodology relies on linear regressions using the method of ordinary least square(OLS). Befor examining the interaction between liquidity and institutional investors, we check for the existence of the endogeneity problem by applying the Durbin-Wu_Hausman test of Davidson and MacKinnon (1993). The results of the endogeneity test show that institutional investor ownership and stock liquidity are endogenous. A simultaneous equation model using the second least square method is then tested to address this problem. Findings The findings show that the proportion of institutional investors has a positive and significant effect on stock-market liquidity, which confirms the signal theory and trading hypothesis. These investors perform high trading activity which favourably affect market liquidity. The results suggests that pension funds manage huge assets decreasing transaction costs and improving liquidity. They display a positive signal to the market about more transparency and a low level of information asymmetry.These results highlight the institutional investors'role in defining the level of liquidity of assets on the French market. Our findings also stress the importance of developing institutional investors'demand for the Paris market in order to better assess firms'values, protect minority ownership and improve market liquidity. Originality/Value In the French institutional setting, institutional investors act as a control device since minority shareholder interests are less protected than in Anglo-American counterparts. This result highlights the significant rôle of institional investors in corporate governance structures and a finacila markets. Their prsence is a guarantee for minority interest protection and for improving market liquidity. [less ▲]

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See detailInstitutionalisation dynamics of Parliamentary Technology Assessment
Rosskamp, Benedikt ULg

Scientific conference (2012, March)

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See detailInstitutionalization dynamics of Parliamentary Technology Assessment
Rosskamp, Benedikt ULg

Conference (2012, October 19)

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See detailInstitutiones semioticae. L'enseignement des manuels
Provenzano, François ULg

in Signata. Annales des Sémiotiques = Annals of Semiotics (2012), 3

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