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See detailFinite orbits of language operations
Charlier, Emilie ULg; Domaratzski, Michael; Harju, Tero et al

in Lecture Notes in Computer Science (2011), 6638

We consider a set of natural operations on languages, and prove that the orbit of any language L under the monoid generated by this set is finite and bounded, independently of L. This generalizes previous ... [more ▼]

We consider a set of natural operations on languages, and prove that the orbit of any language L under the monoid generated by this set is finite and bounded, independently of L. This generalizes previous results about complement, Kleene closure, and positive closure. [less ▲]

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See detailA finite volume based data transfer method for remeshing. Application to metal forming problems
Bussetta, Philippe ULg; Ponthot, Jean-Philippe ULg

in Proceedings of the 18th International Symposium on Plasticity & Its Current Applications (2012, January)

The resolution of many nonlinear solid mechanical problems with the Finite Elements Method requires remeshing when very large deformations occur. The remeshing operation is divided into two parts: the ... [more ▼]

The resolution of many nonlinear solid mechanical problems with the Finite Elements Method requires remeshing when very large deformations occur. The remeshing operation is divided into two parts: the generation of the new mesh and the data transfer from the old to the new mesh. In dynamic plasticity problems, two kinds of fields have to be transferred: the first is defined thanks to the nodal values and the second one is defined at the integration points. These two kinds of fields are transferred thanks to an original computation of the Data Transfer Method based on the Finite Volume Elements. This method is compared to another one using Mortar Elements to solve metal forming problems. [less ▲]

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See detailA finite volume method with conservative and consistent viscous terms discretization for three-dimensional flows
Vigneron, Didier ULg; Vaassen, Jean-Marc; Essers, Jean-André ULg

Conference given outside the academic context (2005)

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See detailA Finite Volume Spatial Discretisation for taxis-diffusion-reaction systems with axi-symmetry: application to fracture healing
Gerisch, Alf; Geris, Liesbet ULg

in Deutsch, A.; Brusch, L.; Byrne, H. (Eds.) et al Advances in Mathematical Modeling of Biological Systems (2007)

We consider the numerical simulation of a time-dependent taxis-diffusion-reaction model of fracture healing in mice using the method of lines. The partial differential equation problem has an axi ... [more ▼]

We consider the numerical simulation of a time-dependent taxis-diffusion-reaction model of fracture healing in mice using the method of lines. The partial differential equation problem has an axi-symmetric structure and this is employed to properly reduce the model to an equivalent problem in two-dimensional (2D) space leading subsequently to an efficient spatial discretisation. Special care is given to respect conservation of mass and the non-negativity of the solution. The numerical simulation results are contrasted to those obtained from a simplistic reduction of the axi-symmetric model to 2D space (at the same computational cost).We observe quantitative and qualitative differences. [less ▲]

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See detailFinite-amplitude regimes of the short-wave Marangoni-Benard convective instability.
Colinet, Pierre; Legros, Jean-Claude; Kamotani, Y. et al

in Physical Review. E : Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics (1995), 52(3), 2603-2616

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See detailFinite-Element Analysis of a Shielded Pulsed-Current Induction Heater -- Experimental Validation of a Time-Domain Thin-Shell Approach
V Sabariego, Ruth ULg; Sergeant, Peter; Gyselinck, Johan et al

in COMPEL (2010), 29(6), 1585-1595

Purpose – The aim of this paper is the experimental validation of an original time-domain thin-shell formulation. The numerical results of a three-dimensional thin-shell model are compared with the ... [more ▼]

Purpose – The aim of this paper is the experimental validation of an original time-domain thin-shell formulation. The numerical results of a three-dimensional thin-shell model are compared with the measurements performed on a heating device at different working frequencies. Design/methodology/approach – A time-domain extension of the classical frequency-domain thin-shell approach is used for the finite-element analysis of a shielded pulse-current induction heater. The time-domain interface conditions at the shell surface are expressed in terms of the average flux density vector in the shell, as well as in terms of a limited number of higher-order components. Findings – A very good agreement between measurements and simulations is observed. A clear advantage of the proposed thin-shell approach is that the mesh of the computation domain does not depend on the working frequency anymore. It provides a good compromise between computational cost and accuracy. Indeed, adding a sufficient number of induction components, a very high accuracy can be achieved. Originality/value – The method is based on the coupling of a time-domain 1D thin-shell model with a magnetic vector potential formulation via the surface integral term. A limited number of additional unknowns for the magnetic flux density are incorporated on the shell boundary. [less ▲]

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See detailFinite-Element Analysis of a Shielded Pulsed-Current Induction Heater-- Experimental Validation of a Time-Domain Thin-Shell Approach
V Sabariego, Ruth ULg; Sergeant, Peter; Gyselink, Johan et al

in Proceedings of the 8th International Symposium on Electric and Magnetic Fields (EMF2009) (2009)

A time-domain extension of the classical frequency-domain thin-shell approach is used for the finite-element analysis of a shielded pulse-current induction heater. The time-domain interface conditions at ... [more ▼]

A time-domain extension of the classical frequency-domain thin-shell approach is used for the finite-element analysis of a shielded pulse-current induction heater. The time-domain interface conditions at the shell surface are expressed in terms of the average (zero-order) instantaneous flux and current density vectors in the shell, as well as in terms of a limited number of higher-order components. The three-dimensional thin-shell model is validated by comparing the numerical results with measurements performed on the heating device at different working frequencies. [less ▲]

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See detailA finite-element reciprocity solution for EEG forward modeling with realistic individual head models
Ziegler, Erik ULg; Chellappa, Sarah Laxhmi ULg; Gaggioni, Giulia ULg et al

in NeuroImage (2014), 103

Highlights • Creates EEG forward models suitable for high-resolution source localization. • Automatic T1-based whole-head finite element meshing and leadfield computation. • Pipelines can incorporate ... [more ▼]

Highlights • Creates EEG forward models suitable for high-resolution source localization. • Automatic T1-based whole-head finite element meshing and leadfield computation. • Pipelines can incorporate conductivity tensors from diffusion-weighted images. • Open-source toolbox shared under a permissive software license. • Accuracy comparable to SimBio FEM and superior to OpenMEEG BEM solutions. [less ▲]

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See detailFinite-element simulations of cup drawing using the taylor and the lamel model
Van Bael, A.; He, S.; Van Houtte, P. et al

in Stören, Sigurd (Ed.) Proceedings of the 7th ESAFORM conference on Materials Forming (2004)

Detailed reference viewed: 19 (3 ULg)
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See detailFinite-elements design of a guarded heating cylinder to measure thermal properties of materials
Nicolas, Jacques ULg; Martin, Fabrice; Andre, Philippe ULg et al

in Review of Scientific Instruments (1990), 61

A device for the measurement of thermal properties of phase change materials and, in general, of medium thermal conductivity materials, is described. The measuring cell is a modified version of the ... [more ▼]

A device for the measurement of thermal properties of phase change materials and, in general, of medium thermal conductivity materials, is described. The measuring cell is a modified version of the guarded hot plate technique, here designed for about 8-cm-diam samples. A well-known difficulty arises in such a device: its limitation when the sample cross section becomes too small with respect to its thickness. A finite-element model is used to study the shape of isotherms in a thick sample (10 cm) for different configurations of the measuring device. This analysis has led to the selection of the optimum design. It shows that the instrument is able to handle samples with a diameter to thickness ratio of about 1 so far as the heat transfer coefficient remains beneath some limits (here 100 W/m2 K). The control system is also described and some typical results are presented. Review of Scientific Instruments is copyrighted by The American Institute of Physics. [less ▲]

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See detailFinite-size effects in BaTiO3 nanowires
Geneste, G.; Bousquet, Eric ULg; Junquera, J. et al

in Applied Physics Letters (2006), 88

The size dependence of the ferroelectric properties of BaTiO3 nanowires is studied from first principles. We show that the ferroelectric distortion along the wire axis disappears below a critical diameter ... [more ▼]

The size dependence of the ferroelectric properties of BaTiO3 nanowires is studied from first principles. We show that the ferroelectric distortion along the wire axis disappears below a critical diameter of about 1.2 nm. This disappearance is related to a global contraction of the unit cell resulting from low atomic coordinations at the wire surface. It is shown that a ferroelectric distortion can be recovered under appropriate tensile strain conditions. (c) 2006 American Institute of Physics. [less ▲]

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See detailFinitely Presented Monoids and Algebras defined by Permutation Relations of Abelian Type
Cedó, Ferran; Jespers, Eric; Klein, Georg ULg

in Journal of Pure and Applied Algebra (2012), 216

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See detailFins a quin punt l'alumnat immigrant és victima de segregacio escolar ? Analisi secundaria de l'estudi PISA 2000
Crahay, Marcel ULg; Monseur, Christian ULg

in In Nouvinguts, fins quan ? Ve Simposi : llengua, educacio i immigracio Coordination (2007)

Detailed reference viewed: 26 (2 ULg)
See detailLes fins du monde peuvent-elles faire littérature ? Exemplarités du récit dystopique
Stienon, Valérie ULg

Scientific conference (2014, March 27)

S’il est possible d’observer de nombreuses œuvres qui, depuis le XIXe siècle et particulièrement au tournant du XXe siècle, se présentent comme des fictions de fins du monde déclinant les situations ... [more ▼]

S’il est possible d’observer de nombreuses œuvres qui, depuis le XIXe siècle et particulièrement au tournant du XXe siècle, se présentent comme des fictions de fins du monde déclinant les situations-catastrophes, il est plus difficile d’appréhender ces textes en mots et en images comme un ensemble cohérent et de les associer à un genre littéraire particulier. Entre désignations d’époque et catégorisations rétrospectives, un corpus se dessine toutefois, qui développe ses propres caractéristiques internes et connaît une histoire éditoriale complexe. La communication propose de réfléchir aux modalités d’appartenance de ces « récits dystopiques » à l’histoire littéraire et aux critères possibles de leur rassemblement pour une étude poétique transversale. [less ▲]

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See detailFiona Templeton
Delville, Michel ULg

in Shelton, Pamela (Ed.) Contemporary Women Poets (1997)

Detailed reference viewed: 3 (1 ULg)
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See detailFIPA : étude clinique et génétique à l'Hôpital "King Edward Memorial", Bombay (Mumbai) Inde
Bothra, N; Daly, Adrian ULg; CASTERMANS, Emilie ULg et al

in Annales d'Endocrinologie (2013, October), 74

Detailed reference viewed: 18 (8 ULg)