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See detailTwo-dimensional harmonic balance finite element modelling of electrical machines taking motion into account
Gyselinck, Johan; Dular, Patrick ULg; Vandevelde, Lieven et al

in Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering (2003), 22(4), 1021-1036

An original and easy-to-implement method to take into account movement (motion) in the 2D harmonic balance finite element modelling of electrical machines is presented The global harmonic balance system ... [more ▼]

An original and easy-to-implement method to take into account movement (motion) in the 2D harmonic balance finite element modelling of electrical machines is presented The global harmonic balance system of algebraic equations is derived by applying the Galerkin approach to both the space and time discretisation. The harmonic basis functions, i.e. a cosine and a sine function for each nonzero frequency and a constant function 1 for the DC component, are used for approximating the periodic time variation as well as for weighing the time domain equations in the fundamental period. In practice, this requires some elementary manipulations of the moving band stiffness matrix. Magnetic saturation and electrical circuit coupling are considered in the analysis as well. As an application example, the noload operation of a permanent-magnet machine is considered. The voltage and induction waveforms obtained with the proposed harmonic balance method are shown to converge well to those obtained with time stepping. [less ▲]

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See detailLes incapacités
Leleu, Yves-Henri ULg

Book (2003)

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See detailHybrid magnetic equivalent circuit - finite element modelling of transformer fed electrical machines
Gyselinck, Johan; Dular, Patrick ULg; Legros, Willy ULg et al

in Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering (2003), 22(3), 643-658

This paper deals with the modelling of transformer supply in the two-dimensional (2D) finite element (FE) simulation of rotating electrical machines. Three different transformer models are compared The ... [more ▼]

This paper deals with the modelling of transformer supply in the two-dimensional (2D) finite element (FE) simulation of rotating electrical machines. Three different transformer models are compared The reference one is based on two 2D FE models, considering a cross-section either parallel or perpendicular to the laminations of the magnetic core. The parameters of the two other transformer models, a magnetic equivalent circuit and an electrical equivalent circuit, can be derived from the reference model Particular attention is paid to some common features of the transformer models, e.g. with regard to the inclusion of iron losses. The three models are used in the 2D FE simulation of the steady-state load operation and the starting from stand-still of an induction motor. [less ▲]

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See detailDysphagia Caused by Ventricular Pseudoaneurysm
Noukoua, C. T.; NCHIMI LONGANG, Alain ULg; Biquet, J. F. et al

in JBR-BTR : Journal Belge de Radiologie - Belgisch Tijdschrift voor Radiologie (2003), 86(3, May-Jun), 168-9

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See detailJustice et gacaca. L'expérience rwandaise et le génocide
Fierens, Jacques ULg; Digneffe, Françoise

Book published by Presses universitaires de Namur (2003)

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See detail12 septembre 1995 : Pierre Mertens est assigné en référé devant le tribunal de grande instance de Paris pour son roman Une paix royale. L’INTELLECTUEL ET SES FABLES
Denis, Benoît ULg

in Bertrand, Jean-Pierre; Biron, Michel; Denis, Benoît (Eds.) et al Histoire de la littérature belge francophone (1830-2000) (2003)

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See detailPhosphate mineral formation in Lake Baïkal sediments and implications for paleoclimate
Fagel, Nathalie ULg; Alleman, L. Y.; André, Luc et al

Poster (2003)

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See detailRecension critique : La fin de l'Ecole
Guillaume, Jean-François ULg

in Schweizerische Zeitschrift für Soziologie = Revue Suisse de Sociologie (2003), 29(1), 195-198

Les analyses, polémiques, sur l'avenir de l'institution scolaire (l'Ecole) ne manquent pas en cette période de glissements des modèles pédagogiques et d'affirmation de nouvelles orientations politiques ... [more ▼]

Les analyses, polémiques, sur l'avenir de l'institution scolaire (l'Ecole) ne manquent pas en cette période de glissements des modèles pédagogiques et d'affirmation de nouvelles orientations politiques tenant, entre autres, à l'imposition d'un modèle centré sur le "long life learning". Mais (ré)affirmer la nécessité d'un ordre républicain permettra-t-il d'affronter les nouveaux enjeux de l'éducation des générations actuelles ? [less ▲]

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See detailHow ergodic is the fragmentation of the pyridine cation? A maximum entropy analysis
Gridelet, E.; Locht, Robert ULg; Lorquet, Andrée ULg et al

in International Journal of Mass Spectrometry (2003), 228(2-3), 389-402

The kinetic energy released to the C4H4+ and HCN fragments produced by the dissociation of the pyridine ion has been determined by a retarding field technique up to an internal energy of 4eV above the ... [more ▼]

The kinetic energy released to the C4H4+ and HCN fragments produced by the dissociation of the pyridine ion has been determined by a retarding field technique up to an internal energy of 4eV above the reaction threshold. This extends our previous study limited to the metastable domain [Int. J. Mass Spectrom. Ion Process. 185/186/187 (1999) 155]. Retarding potential curves resulting from dissociative photoionization using the He(I), Ne(I), and Ar(II) resonance lines have been analyzed by the maximum entropy method. The comparison between the experimentally measured curves and those calculated for the prior (i.e., most statistical) situation reveals the existence of dynamical constraints that prevent phase space from being fully explored. The "ergodicity index" F(E) that measures the efficiency of phase space sampling as a function of the internal energy E of the molecular ion is found to decrease steadily as a function of E and to level off at a value of about 50% when E greater than or equal to 2.5 eV At these high internal energies where phase space exploration no longer decreases, spontaneous intramolecular vibrational energy redistribution (i.e., resulting from the anharmonicity of the molecular vibrations) is thought to contribute to internal energy randomization to a limited extent only. When the lifetime is short, phase space exploration is believed to result instead from the relaxation of the electronic energy via a cascade of non-radiative transitions, which leads to a great diversity of initial conditions, and thus, contributes to statisticity. (C) 2003 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailFaillites et successions: de quelques hypothèses particulières d'interférences
Thirion, Nicolas ULg

in Faillites et régimes matrimoniaux (2003)

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See detailDétermination des acides aminés limitants chez le taurillon BBBc recevant une ration à base d'ensilage de maïs
Frand, Xavier; Froidmont, Eric; Beckers, Yves ULg et al

in Rencontres autour des Recherches sur les Ruminants (2003), 10

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See detailA conceptual framework to design and support self-directed learning in a blended learning program. A case-stydy: the DES-TEF
Denis, Brigitte ULg

in Journal of Educational Media (2003), 28(2-3), 115-127

This paper relates different strategies developed in order to support the learning process in a blended learning programme involving adults from different backgrounds who are interested in the use of ... [more ▼]

This paper relates different strategies developed in order to support the learning process in a blended learning programme involving adults from different backgrounds who are interested in the use of Information and Communication Technologies for Education (ICTE). Referring to Carré & Pearn’s model of the seven pillars of self-learning, the author describes some principles, tools and resources that have been developed within the framework of a postgraduate diploma and that could be extended to similar adult training programmes. [less ▲]

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See detailIl pensiero progettuale: un’analisi critica. Abitare Radical, 1965-1975
Prina, Daniela ULg

Master's dissertation (2003)

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See detailDes lumières et ombres I. La liberté dans les lettres, de la Renaissance à nos jours
Dumortier, Jean-Louis ULg; Liemans, Michel; Marion, Claude ULg

Book published by Van In (2003)

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See detailGAIA and the spectroscopic binaries: what to expect in terms of orbit determination?
Pourbaix, D.; Jancart, Sylvie ULg

in GAIA Spectroscopy: Science and Technology (2003)

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See detailDrains verticaux et matériel associé
Van der Stede, Véronique ULg

in Lebeau, Marc; Suleiman, Antoine (Eds.) Tell Beydar, Five Seasons of Excavations (1995-1999), A Preliminary Report (2003)

 Cet article décrit en détail les dispositifs de drainage équipant le complexe palatial et le temple A de Tell Beydar. Il y est également question des aménagements fixes qui y sont associés et qui ... [more ▼]

 Cet article décrit en détail les dispositifs de drainage équipant le complexe palatial et le temple A de Tell Beydar. Il y est également question des aménagements fixes qui y sont associés et qui doivent vraisemblablement être interprétés comme des toilettes à siège. [less ▲]

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See detailCopropriété et servitudes
Lecocq, Pascale ULg

Scientific conference (2003)

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See detailBibliographie matérielle et critique textuelle. À propos de l'édition de 1751 des Pensées philosophiques de Diderot
Droixhe, Daniel ULg

in Recherches sur Diderot et l'Encyclopédie (2003), 34

Detailed reference viewed: 41 (2 ULg)