Section: Partnerships and Cooperations

International Initiatives

Inria International Partners

MAGIC

• Program: Inria International Partner

• Title: Advance Modelling in Geophysics

• Inria principal investigator: Hélène Barucq

• International Partner (Institution - Laboratory - Researcher):

  • California State University at Northridge (United States) - Department of Mathematics - Rabia Djellouli

• The Associated Team MAGIC was created in January 2006 and renewed in January 2009. At the end of the program in December 2011, the two partners, Magique-3D  and the California State University at Northridge (CSUN). decided to continue their collaboration and obtained the “Inria International Partner” label in 2013.

• See also: https://project.inria.fr/magic/

• The ultimate objective of this research collaboration is to develop efficient solution methodologies for solving inverse problems arising in various applications such as geophysical exploration, underwater acoustics, and electromagnetics. To this end, the research program will be based upon the following three pillars that are the key ingredients for successfully solving inverse obstacle problems: 1) The design of efficient methods for solving high-frequency wave problems. 2) The sensitivity analysis of the scattered field to the shape and parameters of heterogeneities/scatterers. 3) The construction of higher-order Absorbing Boundary Conditions.

• Élodie Éstécahandy defended her PhD thesis, Contribution à l’analyse mathématique et à la résolution numérique d’un problème inverse de scattering élasto-acoustique, on September 19th 2013. She has been coadvised by Hélène Barucq and Rabia Djellouli in the framework of MAGIC.

• Rabia Djellouli visited Magique-3D  in September 2013.

Participation In other International Programs

HOSCAR

• Program: Inria-CNPq

• Title: High performance cOmputing and SCientific dAta management dRiven by highly demanding applications

• Inria principal investigator: Stéphane Lanteri (Nachos, Inria Sophia Antipolis-Méditerranée

• International Partners:

  • LNCC (Laboratório Nacional de Computaçäo Científica), Brazil;

  • COPPE/UFRJ (Instituto Alberto Luiz Coimbra de Pós-Graduaçäo e Pesquisa de Engenharia/Alberto Luiz Coimbra Institute for Grad<uate Studies and Research in Engineering, Universidade Federal do Rio de Janeiro), Brazil;

  • INF/UFRGS (Instituto de Informática, Universidade Federal do Rio Grande do Sul);

  • LIA/UFC (Laboratórios de Pesquisa em Ciência da Computaçäo Departamento de Computaçäo, Universidade Federal do Ceará).

• Inria Teams :

  • NACHOS, Inria Sophia Antipolis - Méditerranée;

  • ZENITH, Inria Sophia Antipolis - Méditerranée;

  • MOAIS, Inria Grenoble - Rhone-Alpes;

  • HIEPACS, Inria Bordeaux - Sud-Ouest;

  • MOAIS, Inria Bordeaux - Sud-Ouest;

  • MAGIQUE 3D, Inria Bordeaux - Sud-Ouest;

• Duration: 2012-2015

• See also: http://www-sop.inria.fr/hoscar/

• HOSCAR is a CNPq - Inria collaborative project between Brazilian and French researchers, in the field of computational sciences, also sponsored by the French Embassy in Brazil. It is coordinated by the team-project Nachos

The general objective of the project is to setup a multidisciplinary Brazil-France collaborative effort for taking full benefits of future high-performance massively parallel architectures. The targets are the very large-scale datasets and numerical simulations relevant to a selected set of applications in natural sciences: (i) resource prospection, (ii) reservoir simulation, (iii) ecological modeling, (iv) astronomy data management, and (v) simulation data management. The project involves computer scientists and numerical mathematicians divided in 3 fundamental research groups: (i) numerical schemes for PDE models, (ii) scientific data management, and (iii) high-performance software systems. Several Brazilian institutions are participating to the project among which: LNCC (Laboratório Nacional de Computaçäo Científica), COPPE/UFRJ (Instituto Alberto Luiz Coimbra de Pós-Graduaçäo e Pesquisa de Engenharia/Alberto Luiz Coimbra Institute for Grad<uate Studies and Research in Engineering, Universidade Federal do Rio de Janeiro), INF/UFRGS (Instituto de Informática, Universidade Federal do Rio Grande do Sul) and LIA/UFC (Laboratórios de Pesquisa em Ciência da Computaçäo Departamento de Computaçäo, Universidade Federal do Ceará). The French partners are research teams from several Inria research centers. Magique-3D  is involved by the way of its research activities on finite element approximations which can be used for resource prospection and reservoir simulation. Several members of Magique-3D  participated to the third workshop of the project in Bordeaux, Sep 2nd to 6th 2013 [69] , [46] , [60] , [78] . In the framework of HOSCAR, Théophile Chaumont-Frelet who is a PhD student in Magique-3D, spent two weeks in August 2013 at the LNCC to initiate a collaboration with Prof. F. Valentin on the development of new finite element methods for the Helmholtz equation.

GEO3D

• Program: Inria-Russia

• Title: Models and numerical simulations in Geosciences: wave propagation in complex media

• Inria principal investigator: Sébastien Tordeux

• International Partner (Institution - Laboratory - Researcher):

  • Novosibirsk State University (Russia (Russian Federation)) - Institute of Numerical Mathematics and Mathematical Geophysics - Sébastien Tordeux

• Duration: January 2012 - December 2014

• See also: http://uppa-inria.univ-pau.fr/m3d/ConfFR/participants.html

• GEO3D is a collaborative project between Magique 3D team-project (Inria Bordeaux Sud-Ouest) and the Institute of Numerical Mathematics and Mathematical Geophysics (Novosibirsk State University) and the Institute of Petroleum Geology and Geophysics, of in the context of geosciences.

  We are mainly interested in the derivation of numerical methods (discontinuous Galerkin approximation, space-time refinement), the design of direct and inverse high performance solver, and the modeling of complex media.

  More precisely, we are actually interested

  1. in the computation of truncated Singular Value decomposition of very large matrix to analyze the inverse problem;

  2. in the coupling of a discontinuous Galerkin method with a finite differences method for the direct problem;

  3. in a spectral time stepping method for the direct problem;

  4. in an algorithm to determine an impedance coefficient using indirect measurement.

• Several researchers from the Institutes of Novosibirsk visited Magique-3D  in 2013

  • Serguey Kabanikhin spent one week in June 2013

  • Maxim Shishlenin spent one month in June 2013 as invited Professor

  • Vadim Lisitsa spent one month in September 2013

  • Vladimir Tcheverda spent one month in September 2013

• Several researchers from Magique-3D  visited the Institute of Numerical Mathematics and Mathematical Geophysics in 2013

  • Julien Diaz spent two weeks in February 2013

  • Vanessa Mattesi spent three weeks in February 2013

  • Sébastien Tordeux spent three weeks in February 2013

  • Sébastien Tordeux spent two weeks in February 2013

  • Vincent Popie spent two weeks in October 2013