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See detailAn Efficient Implicit Scheme for the Treatment of Contact between Deformable Bodies
GRAILLET, D.; Ponthot, Jean-Philippe ULg

in . Proceedings of "NUMIFORM'98, Simulation of Materials Processing: Theory, Methods and Applications (1998, June)

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See detailAn Efficient Implicit Scheme for the Treatment of Contact Between Deformable Bodies
Ponthot, Jean-Philippe ULg; GRAILLET

in Idelsohn, S.; Onate; Dvorkin (Eds.) Proceedings of "World Congress on Computational Mechanics IV (1998)

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See detailAn Efficient Implicit Scheme for the Treatment of Frictional Contact between Deformable Bodies
GRAILLET, D.; Ponthot, Jean-Philippe ULg

in Proceedings of "First ESAFORM Conference on Material Forming" (1998)

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See detailEfficient Implicit Schemes for Finite Element Impact Simulation
Ponthot, Jean-Philippe ULg; Graillet, D.

in International Journal of Crashworthiness (1999), 4(3), 273-285

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See detailEfficient Implicit Schemes for High-Speed Dynamics and Crash Simulation. Application to shock-absorber devices
Hogge, Michel ULg; GRAILLET, D.; Ponthot, Jean-Philippe ULg

in Proceedings of «ACOMEN’98», Advanced Computational Methods in Engineering: Invited Papers (1998, September)

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See detailEfficient implicit schemes for the treatment of the contact between deformable bodies. Application to shock absorber devices
GRAILLET, D.; Stainier, Laurent ULg; Ponthot, Jean-Philippe ULg

in Proceedings of the Fifth National Belgian Congress on Theoretical and Applied Mechanics (2000)

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See detailEfficient Implicit Schemes for Transient Problems in Metal Forming Simulation
Hogge, Michel ULg; Ponthot, Jean-Philippe ULg

in Proc. of NUPHYMAT'96, Numerical and Physical Study of Material Forming Processe (1996)

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See detailEfficient in vitro adipocyte model of long-term lipolysis: A tool to study the behavior of lipophilic compounds
Louis, C; Van Den Daelen; Tinant, G et al

in In Vitro Cellular and Developmental Biology - Animal (2014), 50(6), 507-518

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See detailAn efficient interpolation algorithm for Fourier and diffractive optics
Roose, Stéphane ULg; Brichau, Bart; Stijns, Erik

in Optics Communications (1993), 97(5-6), 312-318

An alternative algorithm for the computation of diffraction (Fourier) integrals is described. Its computation time is comparable with the computation time of an FFT-algorithm combined with zero-framing ... [more ▼]

An alternative algorithm for the computation of diffraction (Fourier) integrals is described. Its computation time is comparable with the computation time of an FFT-algorithm combined with zero-framing. On the other hand it allows a free choice of resolution, as in numerical integration. The features of this algorithm are illustrated on the calculation of a PSF of an aberrated lens. [less ▲]

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See detailEfficient lipofection of human trophoblast cells in primary cultures
Jacquemin, P.; Alsat, E.; Oury, Cécile ULg et al

in Biochemical and Biophysical Research Communications (1993), 196(1), 376-81

Human choriosomatomammotropic hormone, also known as placental lactogen, is expressed in syncytiotrophoblast cells of the placenta. Studying transcriptional regulation of the genes coding for this hormone ... [more ▼]

Human choriosomatomammotropic hormone, also known as placental lactogen, is expressed in syncytiotrophoblast cells of the placenta. Studying transcriptional regulation of the genes coding for this hormone, we became interested in transfecting primary cultures of these trophoblast cells. In this study, we show that it is possible to transfect, by the lipofection method, these giant cells in an efficient and reproducible manner. We show the presence of an enhancer region downstream from the hCS-B gene, functionally active in these cells; furthermore, we demonstrate the placenta-specific characteristic of this enhancer, previously identified in a human choriocarcinoma cell line. [less ▲]

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See detailEfficient mesh management in Eulerian-Lagrangian formulation
Ponthot, Jean-Philippe ULg

in Proceedings of NUMIFORM'89, Numerical Methods in Industrial Forming Processes (1989)

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See detailEfficient method for a controlled deposition of Pd nanoparticles on a glassy carbon electrode
Olu, Pierre-Yves; Chatenet, Marian; Job, Nathalie ULg

Poster (2014)

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See detailAn efficient method for the regeneration of wheat (Triticum aestivum) from anther cultures.
Zhang, Lihong ULg; Anceau, Christine ULg; Lepoivre, Philippe ULg et al

in Bulletin des Recherches Agronomiques de Gembloux (1987), 22(4),

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See detailAn efficient method to generate data and compute exact P-values in goodness-of-fit testing
Magis, David ULg

in Communications in Statistics : Simulation & Computation (2008), 37

In this article, we use a characterization of the set of sample counts that do not match with the null hypothesis of the test of goodness of fit. Two direct applications arise: first, to instantaneously ... [more ▼]

In this article, we use a characterization of the set of sample counts that do not match with the null hypothesis of the test of goodness of fit. Two direct applications arise: first, to instantaneously generate data sets whose corresponding asymptotic P-values belong to a certain pre-defined range; and second, to compute exact P-values for this test in an efficient way. We present both issues before illustrating them by analyzing a couple of data sets. Method’s efficiency is also assessed by means of simulations. We focus on Pearson’s X2 statistic but the case of likelihood-ratio statistic is also discussed. [less ▲]

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See detailEfficient microwave-promoted synthesis of glucuronic and galacturonic acid derivatives using sulfuric acid impregnated on silica
Richel, Aurore ULg; Nicks, Francois ULg; Laurent, Pascal ULg et al

in Green Chemistry Letters & Reviews (2012), 5(2), 179-186

Monomode microwave-assisted syntheses of D-glucuronic and D-galacturonic acid derivatives are reported in the presence of a solid acid catalyst, consisting of sulfuric acid loaded onto silica. This ... [more ▼]

Monomode microwave-assisted syntheses of D-glucuronic and D-galacturonic acid derivatives are reported in the presence of a solid acid catalyst, consisting of sulfuric acid loaded onto silica. This approach affords a variety of surface-active monoglycosylated glucofuranosidurono-6,3-lactones and disubstituted galacturonic adducts in excellent yields in less than 10 min at 85 °C. This study illustrates the application of microwave heating mode, in combination with a cost-effective solid catalyst, as an efficient, selective and eco-friendly methodology in carbohydrate chemistry. [less ▲]

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See detailAn Efficient Numerical Model for the Numerical Simulation of Forming Processes
Ponthot, Jean-Philippe ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

in Khan, Akhtar; Farrokh, Babak (Eds.) Mechanics and Mechanisms of Finite Plastic Deformation : Proceedings of PLASTICITY'08, Fourteenth International Symposium on Plasticity and its Current Applications (2008, January)

In this paper, the Arbitrary Lagrangian Eulerian formalism is used to compute the steady state of a 2D metal cutting operation and a 3D U-shaped cold roll forming process. Compared to the Lagrangian case ... [more ▼]

In this paper, the Arbitrary Lagrangian Eulerian formalism is used to compute the steady state of a 2D metal cutting operation and a 3D U-shaped cold roll forming process. Compared to the Lagrangian case, this method allows the use of a refined mesh near the tools, leading to an accurate representation of the chip formation (metal cutting) and the bending of the sheet (roll forming) with a limited computational time. [less ▲]

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See detailEfficient one-pot synthesis of trans- Pt(II)(salicylaldimine)(4-picoline)Cl complexes: Effective agents for enhanced expression of p53 tumor suppressor genes
Faiz-Ur-Rahman; Ali, Amjad ULg; Rong Guo et al

in Dalton Transactions (2015)

A series of trans-Pt(II)(salicylaldimine)(4-picoline)Cl complexes were synthesized in 78‒87% yield using one-pot procedure from commercially available precursors. The structures of these complexes were ... [more ▼]

A series of trans-Pt(II)(salicylaldimine)(4-picoline)Cl complexes were synthesized in 78‒87% yield using one-pot procedure from commercially available precursors. The structures of these complexes were characterized by 1H, 19F and 13C NMR spectroscopy, HRMS (ESI) as well as single crystal X-ray analysis. Bioactivity investigations including bio-assay, time- and dosedependent, cell cycle progression study, caspase 3 and 9 apoptosis marker assay and DNA interaction using pBR322 plasmid DNA by gel electrophoresis were performed. The results indicated that the complexes showed promising in vitro cytotoxicity in MCF-7 and A549 cancer cell lines. Moreover these complexes enhanced the expression of p53 tumor suppressor gene family members such as p63 and p73. [less ▲]

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See detailEfficient Path Interpolation and Speed Profile Computation for Nonholonomic Mobile Robots
Lens, Stéphane ULg; Boigelot, Bernard ULg

E-print/Working paper (2015)

This paper studies path synthesis for nonholonomic mobile robots moving in two-dimensional space. We first address the problem of interpolating paths expressed as sequences of straight line segments, such ... [more ▼]

This paper studies path synthesis for nonholonomic mobile robots moving in two-dimensional space. We first address the problem of interpolating paths expressed as sequences of straight line segments, such as those produced by some planning algorithms, into smooth curves that can be followed without stopping. Our solution has the advantage of being simpler than other existing approaches, and has a low computational cost that allows a real-time implementation. It produces discretized paths on which curvature and variation of curvature are bounded at all points, and preserves obstacle clearance. Then, we consider the problem of computing a time-optimal speed profile for such paths. We introduce an algorithm that solves this problem in linear time, and that is able to take into account a broader class of physical constraints than other solutions. Our contributions have been implemented and evaluated in the framework of the Eurobot contest. [less ▲]

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See detailEfficient Path Planning for Nonholonomic Mobile Robots
Lens, Stéphane ULg; Boigelot, Bernard ULg

Report (2014)

This work addresses path planning for nonholonomic robots moving in two-dimensional space. The problem consists in computing a sequence of line segments that leads from the current configuration of the ... [more ▼]

This work addresses path planning for nonholonomic robots moving in two-dimensional space. The problem consists in computing a sequence of line segments that leads from the current configuration of the robot to a target location, while avoiding a given set of obstacles. We describe a planning algorithm that has the advantage of being very efficient, requiring less of one millisecond of CPU time for the case studies that we have considered, and produces short paths. Our method relies on a search in a Voronoi graph that characterizes the possible ways of moving around obstacles, followed by a string-pulling procedure aimed at improving the resulting path. [less ▲]

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