Publications ORBi OA
MR1952249, Kriegsmann, G. A. and Tilley, B. S., Microwave heating of laminate panels; J. Engrg. Math.
in Mathematical Reviews [=MR] (2002), 44(2), 173--198Detailed reference viewed: 12 (1 ULg)
MR1955178,Park, Hyo-Il , Multivariate percentile tests for incomplete data ; Ann. Inst. Statist. Math.
in Mathematical Reviews [=MR] (2002), 54(4), 934--944Detailed reference viewed: 22 (1 ULg)
MR1905401,, Khan, A. R. and Elkamel, A., Mathematical model for heat transfer mechanism for particulate System, Appl. Math. Comput.
in Applied Mathematics and Computation (2002), 129(2-3), 295--316Detailed reference viewed: 11 (4 ULg)
MR1915780, de Ũna-́Alvarez, Jacobo , Product-limit estimation for length-biased censored data
in TEST (2002), 11(1), 109--125Detailed reference viewed: 14 (7 ULg)
MR1947180, McKeague, Ian W. and Zhao, Yichuan , Simultaneous confidence bands for ratios of survival functions via empirical likelihood, Statist. Probab. Lett.
in Mathematical Reviews [=MR] (2002), 60(4), 405--415Detailed reference viewed: 18 (2 ULg)
Three-step censored quantile regression and extramarital affairs, J. Amer. Statist. Assoc., Journal of the American Statistical Association
in Mathematical Reviews [=MR] (2002), MR1941416(459), 872--882Detailed reference viewed: 27 (0 ULg)
Hu, Luojia , Estimation of a censored dynamic panel data model,Econometrica. Journal of the Econometric Society
in Mathematical Reviews [=MR] (2002), 70(6), 2499--2517Detailed reference viewed: 23 (1 ULg)
MR1936671, Kavallaris, N. I. and Tzanetis, D. E. , An Ohmic heating non-local diffusion-convection problem for the Heaviside function, ANZIAM J., The ANZIAM Journal. The Australian & New Zealand Industrial and Applied Mathematics Journal
in The Australian & New Zealand Industrial and Applied Mathematics Journal (2002), 44((E)), 114--142Detailed reference viewed: 13 (1 ULg)
MR1922923, Harbrecht, H. and Paiva, F. and Ṕerez, C. and Schneider, R.Biorthogonal wavelet approximation for the coupling of FEM-BEM, Numer. Math.
in Numerische Mathematik (2002), 92(2), 325--356Detailed reference viewed: 8 (0 ULg)
MR1914673, Chen, Jin-ru and Cui, Jun-zhi, Two-scale curved element method for elliptic problems with small periodic coefficients, J. Comput. Math.
in Journal of Computational Mathematics (2002), 20(4), 381--390Detailed reference viewed: 28 (2 ULg)
MR1898723, Kosorok, Michael R., On global consistency of a bivariate survival estimator under univariate censoring, Statist. Probab. Lett.
in Statistics & Probability Letters (2002), (4), 439--446Detailed reference viewed: 5 (1 ULg)
Development of microsatellite markers for the characterisation of Phaeoisariopsis griseola (bean angular leaf spot agent) populations in Central America.
; ; Lepoivre, Philippe
in Plant Protection Science (2002), 38(Special 1),Detailed reference viewed: 49 (0 ULg)
Development of RT-PCR tests for the routine detection of latent and ILAR viruses in fruit trees.
; ; Salmon, Marc et al
in Plant Protection Science (2002), 38(Special 1),Detailed reference viewed: 15 (3 ULg)
Rumen Escape Of Methionine And Lysine Administered Intraruminally To Growing Double-Muscled Belgian Blue Bulls
; ; Thewis, André et al
in Reproduction Nutrition Development (2002), 42(6), 537-544
In many dietary conditions, methionine (Met) and lysine (Lys) are the most limiting amino acids (AA) for ruminants. The AA protected from ruminal fermentation are not commercially available, with the ... [more ▼]
In many dietary conditions, methionine (Met) and lysine (Lys) are the most limiting amino acids (AA) for ruminants. The AA protected from ruminal fermentation are not commercially available, with the exception of Met which is not always economical, especially for meat production. This study measured ruminal escape of free Met and Lys supplemented intraruminally to fast growing bulls. Six double-muscled Belgian Blue bulls, fed a high concentrate diet and fitted with a rumen cannula, received free Met (40 g.d–1) and free Lys (60 g.d–1), individually or simultaneously, in a duplicated Latin square design. The mean ruminal escape of Met and Lys reached 37 and 45% respectively, and did not differ if administered separately or together. Plasma Lys and Met concentrations were increased by 504 and 126%, respectively. Substantial proportions of free AA escaped ruminal fermentation and were available for absorption from the small intestine when they were administered at physiologically high levels. [less ▲]Detailed reference viewed: 36 (4 ULg)
Soil Seed Bank And Seed Dormancy In Wild Populations Of Lima Bean (Fabaceae): Considerations For In Situ And Ex Situ Conservation
; ; et al
in American Journal of Botany (2002), 89(10), 1644-1650Detailed reference viewed: 22 (2 ULg)
Lésions dentaires cervicales non carieuses - Première partie
in Actualités Dentaires de l'Université de Liège (2002), 31Detailed reference viewed: 78 (4 ULg)
Comparaison des cahiers des charges de filières de production porcine sous « signe de qualité » en Région wallonne.
Degre, Aurore ; ; Debouche, Charles
in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2002), 6(4), 221-230Detailed reference viewed: 15 (2 ULg)
Recent Progress In Preliminary Design Of Mechanical Components With Topology Optimization
Duysinx, Pierre ; Bruyneel, Michaël
in Chedmail, Patrick; Cognet, Gérard; Fortin, Clément (Eds.) et al Integrated Design and Manufacturing in Mechanical Engineering (2002)
Since 10 years topology optimisation has been trying to bring an efficient answer to the problem of automatic choice of morphology of mechanical components. This choice is one of the main questions to be ... [more ▼]
Since 10 years topology optimisation has been trying to bring an efficient answer to the problem of automatic choice of morphology of mechanical components. This choice is one of the main questions to be addressed during the preliminary design phase of mechanical and structural components. By topology or morphology of a mechanical or structural component one means here all the basic data that touch the layout. So topology covers for example the number and the relative positions of the wholes in the structural domains, the number and the nature of the structural members, their connectivity and the character of the connecting joints. Before having topology optimisation tool, the selection of the mechanical morphology had been let to engineers’ experience or (even worse sometimes) to their intuition. For example it was a common use in industry to take the topology of an existing product and to use it as it is for the new design. With topology optimisation the choice of morphology can now rely on rational arguments and can be made in order to fit to the product characteristics. Furthermore mathematical tools, because of the optimisation formulation of the design problem, drive the determination of the structural layout. This has two advantages. At first topology optimisation can facilitate the automation of preliminary design steps. Then it can improve substantially the performance of new mechanical products. This means that topology optimisation can propose original and innovative solutions to engineering problems. Some authors suggested that in some problems topology could lead to a gain of performance that could grow up to 50 percents. This paper reports some novel contributions to topology optimisation techniques. Two areas will be addressed. The first one is concerned with recent progress related to the perimeter method of topology optimisation. The perimeter method, which was originally introduced by Haber et al (1996) in topology optimisation, consists in bounding the perimeter of the material distribution in addition to its area. At first recent research focussed on extending the method to 3-D structures. Then other work was made to new quasi-isotropic measures of the perimeter that are nearly insensitive to the mesh. The second axis of our work has been devoted to the treatment of stress constraints. We have continued along the initial work of Duysinx and Bendsøe (1998). The new developments were made to consider stress constraints in practical (industrial) design problems. Firstly we investigated the formulation of the problem in terms of global (i.e. integrated) stress constraints instead of the local stress constraints which can be very cumbersome for practical applications. A second research was devoted to extend the classic von Mises equivalent stress criterion to other kinds of criteria. Indeed in many cases such as in structures made of a material with unequal stress limits, the von Mises criterion is unable to predict a correct topology design. In order to include the effect of different behaviours in tension and compression, we are going to show that Raghava and Ishai quadratic criteria can be used. Finally in the final stage of the paper we will discuss the position of topology optimisation in the design chain. Usual answers in accordance with the current state of the art consider this topology tool as a preliminary design tool. However our experience lead us to a more complicated answer. In a similar way to stress constraints, the ‘optimal’ topology can be dependent on all the design constraints and not only stiffness performance. These constraints can come from the structural (or functional) behaviour, but they can also be related to the manufacturing aspects. Our experience showed that perimeter constraint is quite efficient to limit the design complexity in same cases, especially for planar structures. However this perimeter constraint can lead designs that are totally impossible to manufacture especially in 3-D. For example, perimeter constraint never prevents included wholes that would be impossible to carve out with some fabrication techniques. Thus we come to the conclusion that new progress in topology optimisation should be oriented towards a simultaneous approach of the design problem including most of the functional requirements as well as of the manufacturing restrictions. [less ▲]Detailed reference viewed: 57 (5 ULg)
Ba distribution in surface Southern Ocean sediments and export production estimates
Fagel, Nathalie ; ; André, Luc et al
in Paleoceanography (2002), 17(2, MAR-JUN),
 We present excess Ba (Baxs) data (i.e., total Ba corrected for lithogenic Ba) for surface sediments from a north-south transect between the Polar Front Zone and the northern Weddell Gyre in the ... [more ▼]
 We present excess Ba (Baxs) data (i.e., total Ba corrected for lithogenic Ba) for surface sediments from a north-south transect between the Polar Front Zone and the northern Weddell Gyre in the Atlantic sector and between the Polar Front Zone and the Antarctic continent in the Indian sector. Focus is on two different processes that affect excess Ba accumulation in the sediments: sediment redistribution and excess Ba dissolution. The effect of these processes needs to be corrected for in order to convert accumulation rate into vertical rain rate, the flux component that can be linked to export production. In the Southern Ocean a major process affecting Ba accumulation rate is sediment focusing, which is corrected for using excess Th-230. This correction, however, may not always be straightforward because of boundary scavenging effects. A further major process affecting excess Ba accumulation is barite dissolution during exposure at the sediment-water column interface. Export production estimates derived from excess Th-230 and barite dissolution corrected Baxs accumulation rates (i.e., excess Ba vertical rain rates) are of the same magnitude but generally larger than export production estimates based on water column proxies (Th-234-deficit in the upper water column; particulate excess Ba enrichment in the mesopelagic water column). We believe export production values based on excess Ba vertical rain rate might be overestimated due to inaccurate assessment of the Baxs preservation rate. Barite dissolution has, in general, been taken into account by relating it to exposure time before burial depending on the rate of sediment accumulation. However, the observed decrease of excess Ba content with increasing water column depth (or increasing hydrostatic pressure) illustrates the dependence of barite preservation on degree of saturation in the deep water column in accordance with available thermodynamic data. Therefore correction for barite dissolution would not be appropriate by considering only exposure time of the barite to some uniformly undersaturated deep water but requires also that regional differences in degree of undersatuation be taken into account. [less ▲]Detailed reference viewed: 41 (7 ULg)