References of "2010"
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See detailTool use and site function in the European Middle Palaeolithic
Rots, Veerle ULg

Conference (2010)

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See detailLimiting the parameter search space for dynamic models with rational kinetics using semi-definite programming
Fey, Dirk; Bullinger, Eric ULg

in Proceeding of the 11th International Symposium on Computer Applications in Biotechnology (2010)

Estimation of kinetic parameters is a key step in modelling, as direct measurements are often expensive, time-consuming or even infeasible. The class of dynamic models in polynomial form is particularly ... [more ▼]

Estimation of kinetic parameters is a key step in modelling, as direct measurements are often expensive, time-consuming or even infeasible. The class of dynamic models in polynomial form is particularly relevant in systems biology and biochemical engineering, as those models naturally arise from modelling biochemical reactions using for instance mass action, Michaelis-Menten or Hill kinetics. Often the parameters are not uniquely identifiable for a given model structure and measurement set. Thus the question of which parameters are consistent or inconsistent with the data arises naturally. Here we present a method capable of proving inconsistency of entire parameter regions with the data. Based on the polynomial representation of the system, we formulate a feasibility problem that can be solved efficiently by semi-definite programming. The feasibility problem allows us to check consistency of entire parameter regions by using upper and lower bounds on the parameters. This drastically limits the search space for subsequent parameter estimation methods. In contrast to similar approaches in the literature, the here presented approach does not require a steady state assumption. Measurements at discrete time points are used, but neither regular sampling intervals, nor a time discretisation of the system is required. Measurement uncertainties are dealt with using upper and lower bounds on the measured states. [less ▲]

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See detailA non-destructive testing application solved with A-X geometric eddy-current formulation
Codecasa, Lorenzo; Dular, Patrick ULg; Specogna, Ruben et al

in COMPEL (2010), 29(6), 1606-1615

Purpose – The purpose of this paper is to introduce a perturbation method for the A-X geometric formulation to solve eddy-current problems and apply it to the feasibility design of a non-destructive ... [more ▼]

Purpose – The purpose of this paper is to introduce a perturbation method for the A-X geometric formulation to solve eddy-current problems and apply it to the feasibility design of a non-destructive evaluation device suitable to detect long-longitudinal volumetric flaws in hot steel bars. Design/methodology/approach – The effect of the flaw is accurately and efficiently computed by solving an eddy-current problem over an hexahedral grid which gives directly the perturbation due to the flaw with respect to the unperturbed configuration. Findings – The perturbation method, reducing the cancelation error, produces accurate results also for small variations between the solutions obtained in the perturbed and unperturbed configurations. This is especially required when the tool is used as a forward solver for an inverse problem. The method yields also to a considerable speedup: the mesh used in the perturbed problem can in fact be reduced at a small fraction of the initial mesh, considering only a limited region surrounding the flaw in which the mesh can be refined. Moreover, the full three-dimensional unperturbed problem does not need to be solved, since the source term for computing the perturbation is evaluated by solving a two-dimensional flawless configuration having revolution symmetry. Originality/value – A perturbation method for the A-X geometric formulation to solve eddy-current problems has been introduced. The advantages of the perturbation method for non-destructive testing applications have been described. [less ▲]

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See detailSize noun constructions as collocationally constrained constructions: lexical and grammaticalized uses
Brems, Lieselotte ULg

in English Language and Linguistics (2010), 14(1), 83-109

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See detailManagement effects on net ecosystem carbon and GHG budgets at European crop sites
Ceschia, E.; Beziat, P.; Dejoux, J. F. et al

in Agriculture, Ecosystems & Environment (2010), 139

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See detailIron-manganese phosphates with the olivine- and alluaudite-type structures: crystal chemistry and applications
Hatert, Frédéric ULg

in Minerals as Advanced Materials II, Abstract Book (2010)

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See detailIII-V Devices for Advanced CMOS
Waldron, Niamh; Nguyen, Ngoc Duy ULg; Lin, Dennis et al

in 217th ECS Meeting (2010)

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See detailComparison of Field Transfer Methods between two meshes
Bussetta, Philippe ULg; Ponthot, Jean-Philippe ULg

in Proceedings of "IV European Conference on Computational Mechanics" (2010)

In many cases, the numerical computation of mechanical problem with Finite Element Method has to transfer some information between two different meshes. For example, if a remeshing is needed or if several ... [more ▼]

In many cases, the numerical computation of mechanical problem with Finite Element Method has to transfer some information between two different meshes. For example, if a remeshing is needed or if several meshes are used (e.g. one for a thermal problem and another one for a mechanical problem). In spite of the research on the Transfer Methods, none of them has been so far clearly established as the best. Each method has advantages and disadvantages. Many problems can happen during the field transfer, like the minimization of the numerical diffusion, the value of the field on the boundaries, etc. This paper compares on the one hand the performances of the Field Transfer Method by classical interpolation with on the other hand one using Mortar Elements. The comparison of the two methods is based on two indicators: the numerical diffusion and the evaluation of the field on the boundaries. In this paper, only the continuous fields are considered. [less ▲]

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See detailLes forêts claires de Nkayamba et de Nyamirambo de la Réserve Naturelle de Rumonge (Burundi): phytogéographie et types biologiques.
Habonimana, B; Bogaert, Jan ULg; Nzigidahera, B et al

in Bulletin Scientifique de l'Institut National pour l'Environnement et la Conservation de la Nature (INECN) (2010), 8

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See detailDe la (sur)vie des marionnettes
Tomasovic, Dick ULg

in Centre de la Marionette de la Communauté française de Belgique (Ed.) La marionnette et le film d'animation (2010)

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See detailComparison of accuracy of sonography, rectal palpation, and pregnancy-associated glycoproteins tests for pregnancy diagnosis in cows
Gajewski, Z.; Petrajtis, M.; Melo de Sousa, Noelita ULg et al

in Proceedings of the XIth Middle European Buiatrics Congress (2010)

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See detailHistory effect of light and temperature on monoterpenoid emissions from Fagus sylvatica L.
Demarcke, M.; Schoon, N.; Van Langenhove, H. et al

in Atmospheric Environment (2010), 44(27), 3261-3268

Monoterpenoid emissions from Fagus sylvatica L trees have been measured at light- and temperature-controlled conditions in a growth chamber, using Proton Transfer Reaction Mass Spectrometry (PTR-MS) and ... [more ▼]

Monoterpenoid emissions from Fagus sylvatica L trees have been measured at light- and temperature-controlled conditions in a growth chamber, using Proton Transfer Reaction Mass Spectrometry (PTR-MS) and the dynamic branch enclosure technique. De novo synthesized monoterpenoid Standard Emission Factors, obtained by applying the G97 algorithm (Guenther, 1997), varied between 2 and 32 mu g g(-1)DW h(-1) and showed a strong decline in late August and September, probably due to senescence. The response of monoterpenoid emissions to temperature variations at a constant daily light pattern could be well reproduced with a modified version of the MEGAN algorithm (Guenther et al., 2006), with a typical dependence on the average temperature over the past five days. The diurnal emissions at constant temperature showed a typical hysteretic behaviour, which could also be adequately described with the modified MEGAN algorithm by taking into account a dependence on the average light levels experienced by the trees during the past 10-13 h. The impact of the past light and temperature conditions on the monoterpenoid emissions from E sylvatica L was found to be much stronger than assumed in previous algorithms. Since our experiments were conducted under low light intensity, future studies should aim at confirming and completing the proposed algorithm updates in sunny conditions and natural environments. (C) 2010 Elsevier Ltd. All rights reserved. [less ▲]

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