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.

In this framework, Rabia Djellouli visited Magique 3D in December 2014

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 Graduate 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 Graduate 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.

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, 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 in

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

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

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

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

An international workshop on “Computational Geophysics” gathering around 50 participants has been organized in Novosibirsk in the framework of GEO3D in September 2014