A seminar by Paul Cupillard at ENSG, Nancy, room G201
On Friday 2nd of June, 1:00 pm.
La rétropropagation de signaux sismiques enregistrés à un ensemble de récepteurs permet de focaliser l'énergie sismique à son origine avec une précision plus ou moins grande. Ce phénomène est permis par la réversibilité en temps et en espace de l'équation des ondes. Dans cette présentation, je jetterai les bases théoriques du phénomène puis discuterai de sa possible utilisation dans la caractérisation d'évènements microsismiques en m'appuyant sur la bibliographie récente.
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A seminar by: Pierre Anquez at ENSG, Nancy, room G201
On: Friday, 14th of April, 1:00 pm.
Lors de ce séminaire, j'aimerai vous faire partager ce que j'ai pu apprendre lors de ma précédente formation doctorale sur les questions de management de la qualité. J'illustrerai également ce séminaire avec le principe d'amélioration continue, notamment au travers d'une méthode découverte via une lecture personnelle : la méthode des 5S.
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A seminar by Julien Renaudeau at ENSG, Nancy, room G201
On Monday 22nd of May, 1:00 pm.
There exists two different approaches to solve the implicit structural modeling problem that have been proven sufficiently efficient to be widely used. The first one is a mesh based approach consisting in solving both smoothness and data constraints, while the second one is a meshless approach consisting in solving only data constraints. The presence or not of the mesh radically changes the problem at hand. In the first case, data information is reverberated to its surroundings by the mesh connectivity and the smoothness constraint, resulting in a sparse system. In the second
case, data information is perceived everywhere in the studied domain thanks to globally defined shape functions, and which generates a dense system. Therefore, while avoiding the mesh creation in the second approach, we still have to deal with the problematic dense system, making a strong argument of efficiency for the first approach.
In this article, we suggest a third alternative: a meshless approach consisting in solving both smoothness and data constraints, but with locally defined shape functions. Our goal is not to demonstrate a perfect combination but to show that the local meshless concept in structural modeling enables to avoid the creation of a complex mesh while solving a sparse system and still obtaining comparable results. Moreover, we use the variational minimization of the bending energy in order to constrain the smoothness, which is new in structural modeling.
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A seminar by: Fabien Bosquet at ENSG, Nancy, room G201
On: Friday, 7th of April, 1:00 pm.
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A seminar by Francois Bonneau at ENSG, Nancy, room G201
On Friday 12th of May, 1:00 pm.
This paper proposes to improve the natural fracture network characterisation by analysis microseismic data. We use a 3D Hough transform to build fracture orientation and density maps describing discontinuities that cannot be described by other measurements. The stochastic Discrete fracture simulator combines geostatistical and pseudo-genetic approaches to generate models that honour both measures from field characterisation and hierarchical organisation that result from the fracturing process itself. We suggest that using realistic fracture network characterisation and introducing mechanical concepts in the DFN simulation process affect connectivity of DFNs, hence is essential for predictivity of reservoir flow models.
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A seminar by: Professor Helmut Schaeben (TU Freiberg) at ENSG, Nancy, room G201
On: Friday, 31st of March, 1:00 pm.
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A seminar by Margaux Raguenel at ENSG, Nancy, room G201
On Friday 5th of May, 1:00 pm.
This presentation is a rehearsal for my mid-candidature review. I will present the work I have done for the first part of my PhD, the results obtained and my plans for the continuation.
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A seminar by: Nicolas Jules Goffaux at ENSG, Nancy, room G201
On: Friday, 17th of March, 1:00 pm.
The aim of this project is to document the element mobility and understand the structurally and geochemically controlled uranium mineralization and establishing vectoring tools for uranium exploration. The first aim of this project is to build a model of the Mesoproterozoic Athabasca Basin, the unconformity, and the underlying Archean/Paleoproterozic basement lithologies using GOCAD. This first modeling stage is performed thanks to borehole data, geological maps, aeromagnetic maps, and gravity maps. This shows that the basin architecture is influenced by large-scale fault zones, reactivated from the underlying basement rocks, and faults post-dating the basin deposition. The challenge will be to understand the fault network and the geological history of the basin. As soon as this basin model has been constructed, a more detailed analysis of the McArthur River Zones 3 and 4 will be performed. Seismic data, local geological maps and more detailed boreholes will be used in order to create a comprehensive 3D model at the mine scale. In a final stage, geochemical data will be coupled to the model using ioGAS and its link to GOCAD. The aim of this stage (the final aim of the project) is to document the element mobility and associated mass-balance gains/losses within and out of the mineralized zones for understanding the structural-geochemical controls of mineralization and for establishing geochemical vectoring tools for regional- to district-scale uranium exploration.
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A seminar by Christine Fay-Varnier at ENSG, Nancy, room G201
On Friday 28th of April, 1:00 pm.
En avril 2015 a eu lieu le séminaire annuel de l'Ecole Internationale de Recherche Agreenium (EIR-A) organisé en partenariat avec le centre INRA de Nancy-Lorraine, AgroParisTech Nancy et l’Université de Lorraine. Une des matinées a été consacrée aux questions d’Éthique et d’Intégrité en recherche. Cette matinée a été animée par Philippe Feldmann, secrétaire de la commission d’Éthique et d’Intégrité scientifique de l’ANR, Michelle Hadchouel, Déléguée à l’intégrité scientifique de l’Inserm, Marie de Lattre-Gasquet, membre de la commission d’Ethique et d’Intégrité scientifique de l’ANR et Christine Fay-Varnier de l’Université de Lorraine.
Je propose de projeter une partie des interventions de cette matinée qui ont été filmées, afin de pouvoir ensuite interroger et alimenter nos réflexions autour de l'Intégrité et de l’Éthique en Recherche.
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- Category: Seminar