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See detailThe Masses and Radii of HD186753B and TYC7096-222-1B: The First M-dwarfs known to Eclipse A-type Stars
Bentley, S. J.; Smalley, B.; Maxted, P. F. L. et al

in Astronomy and Astrophysics (2009)

We present observations of two new single-lined eclipsing binaries, both consisting of an Am star and an M-dwarf, discovered by the Wide Angle Search for Planets transit photometry survey. Using WASP ... [more ▼]

We present observations of two new single-lined eclipsing binaries, both consisting of an Am star and an M-dwarf, discovered by the Wide Angle Search for Planets transit photometry survey. Using WASP photometry and spectroscopic measurements we find that HD186753B has an orbital period of $P=1.9194$ days, a mass of $M=0.24\pm0.02 M_{\odot}$ and radius of $R=0.31^{+0.06}_{-0.06} R_{\odot}$; and that TCY7096-222-1B has an orbital period of $P=8.9582$ days, a mass of between 0.29 and 0.54 $M_{\odot}$ depending on eccentricity and radius of $R=0.263^{+0.02}_{-0.07} R_{\odot}$. We find that the Am stars have relatively low rotational velocities that closely match the orbital velocities of the M-dwarfs, suggesting that they have been "spun-down" by the M-dwarfs. [less ▲]

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See detailContre le "fin sourire": la poétique du rire de Georges Fourest
Robert, Laurent ULg

in Acta Iassyensia Comparationis (2009), 7

Cet article propose une analyse de la poétique du rire à l’œuvre dans La Négresse blonde de Georges Fourest. Se démarquant de Corbière et Laforgue, Fourest renoue avec un rire carnavalesque hérité de ... [more ▼]

Cet article propose une analyse de la poétique du rire à l’œuvre dans La Négresse blonde de Georges Fourest. Se démarquant de Corbière et Laforgue, Fourest renoue avec un rire carnavalesque hérité de Rabelais, mais nuancé de références blasphématoires ou sataniques inspirées par la littérature décadente, et notamment par les écrits de Huysmans. [less ▲]

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See detailSocial security and early retirement: the relationship between workers, firms and government
Lefebvre, Mathieu ULg

E-print/Working paper (2009)

In this paper we survey a number of theoretical and empirical studies in order to propose explanations to the fall of labor force participation at older age. Starting from the largely studied effect of ... [more ▼]

In this paper we survey a number of theoretical and empirical studies in order to propose explanations to the fall of labor force participation at older age. Starting from the largely studied effect of social security schemes on labor supply, we explore the employers behavior and the role of governments in the development of early retirement schemes. We show that early retirement is the result of a global agreement between firms and government where workers have incentives to early exit the labor market due to generous non actuarial bene ts. Firms have an advantage to separate older workers because they are costly compare to young workers and governments hope that by pushing elderly into early retirement they will solve the massive unemployment problem. [less ▲]

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See detailDesigning Steel Structures for Fire Safety
Franssen, Jean-Marc ULg; Kodur, Venkatesh; Zaharia, Raul

Book published by Taylor & Françis Ed. (2009)

In this book the information relevant to fire design of steel structures is presented in a systematic way in seven chapters. Each Chapter begins with an introduction of various concepts to be covered and ... [more ▼]

In this book the information relevant to fire design of steel structures is presented in a systematic way in seven chapters. Each Chapter begins with an introduction of various concepts to be covered and follows with detailed explanation of the concepts. The calculation methods as relevant to code provisions (in Europe, North America or other continents) are discussed in detail. Worked examples relevant to calculation methodologies on simple structural elements are presented. For the case of complete structures guidance on how analysis can be carried out is presented. Chapter 1 of the book is devoted to providing relevant background information to codes and standards and principles of fire resistance design. The chapter discusses the fire safety design philosophies, prescriptive and performance-based design fire safety design issues. Chapter 2 deals with basis of design and mechanical loads. The load combinations to be considered for fire design of structures, as per European and North American codes and standards, are discussed. Chapter 3 discusses the detailed steps involved in establishing the fire scenarios for various cases. Both Eurocode and North American temperature-time relationships are discussed. Procedures in this section allow the designer to establish the time-temperature relationships or heat flux evolutions under a specified design fire. Chapter 4 deals with steps associated in establishing the temperature history in the steel structure, resulting from fire temperature. The various approaches for undertaking thermal analysis by simple calculation models are discussed. Chapter 5 presents the steps associated for establishing the mechanical response of a structure exposed to fire. The possibilities for analysis at different levels: member level, sub-structure level and global level are discussed. Full details related to simple calculation methods for undertaking strength analysis at member level are presented. Chapter 6 is devoted to fire resistance issues associated with design of joints. The steps associated with the fire resistance of a bolted or a welded joint through simplified and detailed procedure are discussed. Chapter 7 deals with thermal and mechanical analysis through advanced calculation models. The procedures involved in the sub-structure analysis or global structural analysis under fire exposure is fully discussed. Case studies are presented to illustrate the detailed fire resistance analysis of various structures. Chapter 8 presents four design examples showing how a complex structure can be designed using the concept of element or sub-structure analysis. The book concludes with two Annexes which present some of the design information related to material properties and temperature profiles. Annex 1 focuses on thermal properties of structural steel and commonly used insulation materials and resulting temperature profiles in steel. Annex 2 focuses on mechanical properties of structural steel. [less ▲]

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See detailEntanglement and Localization of Wavefunctions
Giraud, Olivier; Georgeot, Bertrand; Martin, John ULg

in Complex Phenomena in Nanoscale Systems, NATO Science for Peace and Security Series B: Physics and Biophysics, Volume . ISBN 978-90-481-3118-1. Springer Netherlands, 2009, p. 51 (2009)

We review recent works that relate entanglement of random vectors to their localization properties. In particular, the linear entropy is related by a simple expression to the inverse participation ratio ... [more ▼]

We review recent works that relate entanglement of random vectors to their localization properties. In particular, the linear entropy is related by a simple expression to the inverse participation ratio, while next orders of the entropy of entanglement contain information about e.g. the multifractal exponents. Numerical simulations show that these results can account for the entanglement present in wavefunctions of physical systems. [less ▲]

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See detailJudicial Review in French Competition Law and Economic Regulation: A Post Commission v. Tetra laval Assessment
Petit, Nicolas ULg; RABEUX, L.

in ESSENS, Oda; GERBRANDY, Anna; LAVRIJSSEN, Saskia (Eds.) National courts and the Standard of Review in Competition Law and Economic Regulation (2009)

The present article seeks to assess the degree of judicial scrutinity performed by French courts when reviewing decisions of National competition Authorities and National Regulatory Authorities in the ... [more ▼]

The present article seeks to assess the degree of judicial scrutinity performed by French courts when reviewing decisions of National competition Authorities and National Regulatory Authorities in the aftermath of the seminal ruling handed down by the European Court of Justice in Commission v. Tetra Laval [less ▲]

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See detailMeasuring home-range quality in the frugivorous gibbon (Hylobates lar)
Hambuckers, Alain ULg; Huynen, Marie-Claude ULg; Savini, Tommaso

Conference (2009)

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See detailScedosporium apiospermum septicemia following a wedge excision of an ingrown toenail.
Vanhooteghem, Olivier ULg; Gillard, Patricia ULg; Dezfoulian, Bita ULg et al

in International Journal of Dermatology (2009), 48(10), 1137-1139

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See detailProduction and toxicity of γ-decalactone and 4-hydroxydecanoic acid from Rhodotorula aurantiaca
Alchihab, Mohamed ULg; Destain, Jacqueline ULg; Aguedo, Mario ULg et al

Poster (2009)

The objective of this study was to compare the production of γ- decalactone in different scales and to study the effects of 4- hydroxydecanoic acid and γ-decalactone on the growth of R. aurantiaca. The ... [more ▼]

The objective of this study was to compare the production of γ- decalactone in different scales and to study the effects of 4- hydroxydecanoic acid and γ-decalactone on the growth of R. aurantiaca. The effect of gum tragacanth on the production of γ-decalactone by R. aurantiaca was evaluated. [less ▲]

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See detailCorrelation between the roughness of the substrate surface and the debonding risk
Perez, Fabien; Morency, Maxim; Bissonnette, Benoît et al

in Alexander, M. G.; Beushausen, H.-D.; Dehn, F. (Eds.) et al Concrete Repair, Rehabilitation and Retrofitting II (2009)

This paper presents the influence of substrate surface preparation on the adhesion strength of repaired beams system. Bond between new and old concrete has been the subject of a number of investigations ... [more ▼]

This paper presents the influence of substrate surface preparation on the adhesion strength of repaired beams system. Bond between new and old concrete has been the subject of a number of investigations, but in most cases, only adhesion strength was addressed. This parameter was used to estimate the durability and/or the debonding risk for repaired structure and it’s a generally accepted auditing standards. Usually, surface preparation of the substrate concrete is considered essential to achieve a durable repair because of its influence on the bond strength. To better understand debonding mechanism, in particular these related to surface preparation, roughness parameters were calculated to quantify the influence of surface preparation on the structural behaviour. Using this approach, repair beams prepared by way of four (4) concrete surface preparations were characterized. Results obtained show that repaired beams presenting a substrate with a rough surface permit to achieve a monolithic behaviour of the repaired system. Opposite structural behaviour, with large debonding, was recorded for those having smooth surface. However, all surface preparations used have promoted the same bond strength regardless the roughness of the substrate. The resulting analysis highlights the relation between roughness parameter αrough and the debonding mechanism of repaired beams. Such results will be useful to better predict the performance of concrete repairs. [less ▲]

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See detailMulti-disciplinary approach for sediment dynamics study of active floodplains
Gautier, E.; Corbonnois, J.; Petit, François ULg et al

in Geomorphologie (2009)

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See detailIntentional patina of metal archaeological artefacts; a non-destructive investigation of Egyptian and Roman museum treasures
Mathis, François ULg; Aucouturier, Marc; Robcis, Dominique et al

Conference (2009)

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See detailDans le "Gyron" de Marguerite de Croy, comtesse de Lalaing (1508-1549)
Adam, Renaud ULg

in Adam, Renaud; Marchandisse, Alain (Eds.) Le livre au fil de ses pages : actes de la 14e journée d'étude du réseau de médiévistes belges de langue française, Université de Liège, 18 novembre 2005 (2009)

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See detailBottom friction formulations for free surface flow modeling
Machiels, Olivier ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in 8th NCTAM Congress (2009)

Bottom friction modeling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach ... [more ▼]

Bottom friction modeling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach based on turbulence analysis. Following the definition of the flow validity field of the main friction laws proposed in the iterature, an original continuous formulation has been developed. It is suited to model river flows with a high variability of properties (water depth, discharge, roughness…). The efficiency of this new formulation, theoretically established and numerically adjusted, is demonstrated through various practical applications. [less ▲]

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See detailTe Visioscan driven ULEV and SELS methods
QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

in Handbook of cosmetic science and technology (2009)

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See detailModal Analysis of a Nonlinear Periodic Structure with Cyclic Symmetry
Georgiades, Fostios; Peeters, Maxime ULg; Kerschen, Gaëtan ULg et al

in AIAA Journal (2009), 47

The objective of this paper is to examine nonlinear normal modes and their bifurcations in cyclic periodic structures. The nonlinear normal modes are computed using a numerical technique that combines ... [more ▼]

The objective of this paper is to examine nonlinear normal modes and their bifurcations in cyclic periodic structures. The nonlinear normal modes are computed using a numerical technique that combines shooting and pseudoarclength continuation. Unlike perturbation techniques, the resulting algorithm can investigate strongly nonlinear regimes of motion. This study reveals that modal interactions may occur without necessarily having commensurate natural frequencies in the underlying linear system. In addition, a countable infinity of such modal Q2 interactions are shown to exist in the system. [less ▲]

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See detailPerformance et conceptualisation : quelle place dans l’évaluation des compétences professionnelles à utiliser un traitement de texte ?
Chenu, Florent ULg

in Travail et Apprentissage. Revue de Didactique professionnelle (2009), 4

L’article présente les premiers résultats d’une recherche menée sur l’évaluation des compétences professionnelles . Plus précisément, ces travaux s’inspirent d’un texte de Mayen (2003) dans lequel il ... [more ▼]

L’article présente les premiers résultats d’une recherche menée sur l’évaluation des compétences professionnelles . Plus précisément, ces travaux s’inspirent d’un texte de Mayen (2003) dans lequel il propose de prendre en compte des indicateurs basés sur la conceptualisation de l’action pour évaluer des compétences professionnelles. Le but de l’expérimentation est d’examiner quels liens existent entre performance et conceptualisation (explicitée) dans l’utilisation professionnelle d’un traitement de texte. Un dispositif a permis de rencontrer individuellement 32 personnes inscrites en formation professionnelle dans le domaine de la bureautique. Ces rencontres ont consisté en la réalisation de tâches de type professionnel, en la participation à un entretien d’explicitation à propos des raisonnements mis en œuvre dans le cadre ces tâches et en l’administration d’un test mesurant de manière décontextualisée la maîtrise des commandes et outils du traitement de texte utiles voire nécessaires pour agir efficacement par rapport à ces tâches. Les premiers résultats sont les suivants : 1. Les raisonnements repérés chez les personnes en formation ne semblent pas s’organiser comme d’autres travaux en didactique professionnelle décrivent qu’ils s’organisent chez des professionnels d’autres domaines. En effet, bien que le contenu des explicitations des sujets puisse être rapproché de « propositions tenues pour vraies sur le réel » (Vergnaud, 2002, p.20), on est loin de découvrir un système construit autour de concepts centraux organisant l’activité du sujet de manière globale. Ce n’est pas une esquisse de modèle opératif (Pastré, 2007, 2008a, 2008b) qui apparaît mais plutôt un éventail large de raisonnements, de principes, de règles relativement indépendants les uns des autres, pour décrire ou/et justifier des actions et des manipulations limitées. 2. Des catégories peuvent être établies pour caractériser les modes de raisonnements véhiculés relevés dans les explicitations des sujets rencontrés, notamment par rapport à leur degré de rationalité. Ce texte présente un premier contour de ces catégories. [less ▲]

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See detailMolecular characterization of the bovine GHRL gene
Colinet, Frédéric ULg; Portetelle, Daniel ULg; Renaville, Robert ULg

in Archiv für Tierzucht = Archives Animal Breeding (2009), 52(1), 79-84

Bovine ghrelin, a 27 amino acid pepticle, has been identified in oxyntic glands of the abomasum. It is an endogenous ligand for growth hormone secretagogue receptor and stimulates food intake and growth ... [more ▼]

Bovine ghrelin, a 27 amino acid pepticle, has been identified in oxyntic glands of the abomasum. It is an endogenous ligand for growth hormone secretagogue receptor and stimulates food intake and growth hormone secretion. The bovine GHRL gene was completely sequenced and consists of five exons and four introns. Like mouse and human GHRL genes, we found that the bovine GHRL gene also contains a first non-coding exon of 21 bp. The bovine GHRL gene codes for 116 amino acid pepticle named preproghrelin which contains the ghrelin pepticle and another pepticle similar to obestatin. Sequence analysis revealed eight polymorphisms, which are located in the non-coding sequence of the gene. [less ▲]

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See detailL’impact de l’exposition à des modèles d’entrepreneurs sur les antécédents de l’intention entrepreneuriale
Aouni, Zineb ULg; Pirnay, Fabrice ULg

in Actes du 6ème Congrès de l’Académie de L’Entrepreneuriat (2009)

Devant la multiplication des programmes de formation et de sensibilisation à l’entrepreneuriat, la question reste posée quant à l’efficacité des actions et des méthodes pédagogiques utilisées. La présente ... [more ▼]

Devant la multiplication des programmes de formation et de sensibilisation à l’entrepreneuriat, la question reste posée quant à l’efficacité des actions et des méthodes pédagogiques utilisées. La présente étude propose de à cette question en s’intéressant à l’impact d’un événement de sensibilisation de courte durée (une soirée) qui utilise prioritairement une seule méthode pédagogique consistant en l’exposition à des modèles d’entrepreneurs. L’évaluation d’impact se base sur des indicateurs liés aux changements d’attitudes à l’égard de l’entrepreneuriat et par conséquent à des changements au niveau de l’intention d’entreprendre. Se basant sur la théorie de l’apprentissage entrepreneurial qui suppose que les individus apprennent différemment d’une même expérience en fonction de leur niveau de connaissance initial (Minniti et Bygrave, 2001 ; Cope, 2005), cette étude distingue l’analyse d’impact selon deux groupes de participants en fonction de leur niveau de perceptions (attitudes et sentiment de capacité) et d’intention entrepreneuriale initial. Les résultats de cette étude permettent ainsi d’identifier les variables de perception pouvant influencer l’impact de l’exposition à des modèles d’entrepreneurs et de conclure par rapport à l’influence du stock de connaissances préalable sur le processus d’apprentissage entrepreneurial. La méthode préconisée propose une analyse comparative entre un échantillon de 288 participants à l’événement de sensibilisation et un groupe de contrôle composé de 46 répondants non participants. La présente étude repose ainsi sur le protocole pré-post test avec groupe de contrôle. En terme d’implications pratiques, cette étude permet aux responsables de formations à l’entrepreneuriat d’appliquer des méthodes pédagogiques appropriées au public auquel ils s’adressent (en terme de niveau de perceptions et d’intention entrepreneuriale) ou de mieux cibler le public approprié aux actions pédagogiques utilisées. [less ▲]

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