Welcome on my personal pages!
FrançaisI hold a Ph.D. in astrophysics, and I currently am an engineer-researcher, expert in high performance computing at CEA (the French equivalent of the US National Laboratories).
I am an expert in high performance computing with a special interest in GPU programming, HPC runtimes, HPC/AI convergence and quantum computing. I am in charge of the Wi4MPI project. I developped (and still contribute to) a magnetohydrodynamics numerical code used in the astrophysics community (e.g. to study protoplanetary discs dynamics), that I ported on massively parallel architectures (30,000+ CPU, GPU). I did the turbulent simulation with the largest resolution at that time (in 2012-2013; here is a talk on this subject).
Previously, I was the head of the Innovation and Studies division at Adoc Talent Management. I was coordinating and conducting sociological studies on doctorate holders, developping tools to accompany doctorate holders on their career path, and hosting trainings for early career stage researchers.
During my Ph.D. (in French), I studied star formation processes, mostly through numerical simulation.
Publications
In peer-reviewed journals and conferences
Leon, M. Joos, N. Hanford, A. Cotte, T. Delforge, F. Diakhaté, V. Ducrot, I. Karlin, M. Pérache, On-the-Fly, Robust Translation of MPI Libraries, IEEE International Conference on Cluster Computing, 2021
Méheut, S. Fromang, G. Lesur, M. Joos, P.-Y. Longaretti. Angular momentum transport and large eddy simulations in magnetorotational turbulence : the small Pm limit, A&A, 579 : 117, 2015
Padovani, D. Galli, P. Hennebelle, B. Commerçon, M. Joos. The role of cosmic rays on magnetic field diffusion and the formation of protostellar discs. A&A, 571 :33, 2014
M. Joos, P. Hennebelle, A. Ciardi, S. Fromang. The influence of turbulence during magnetized core collapse and its consequences on low-mass star formation. A&A, 554 : 17, 2013
M. Joos, P. Hennebelle, A. Ciardi. Protostellar disk formation and transport of angular momentum during magnetized core collapse. A&A, 543 : 128, 2012
Hennebelle, B. Commercon, M. Joos, R. Klessen, M. Krumholz, J.C. Tan, R. Teyssier. Collapse, outflows and fragmentation of massive, turbulent and magnetized barotropic cores. A&A, 528 : 172, 2011
Giraud, M. Joos, J. Courtieu et D. Merlet. Application of a 1H delta-resolved 2D NMR experiment to the visualization of enantiomers in chiral environment, using sample spatial encoding and selective echoes, Magn. Res. Chem., 47 :300-306, 2009
Selected talks
Environment Modules: why this old idea is still useful today and what's next , X. Delaruelle & M. Joos, (FOSDEM'25)
Wi4MPI: how to improve container portability, M. Joos, (HPCW24)
Overcoming MPI ABI compatibility, M. Joos, (FOSDEM'24)
Proceedings
M. Joos, C. Chapin, G. Dalton. A linked up global network of Gender Equality programs and best practice internationally. Vitae Researcher Development International Conference, 2017
M. Joos. Étude sur la carrière des jeunes chercheuses après un doctorat. Colloque Femmes et Sciences 2016, 2016
M. Joos, S. Fromang, H. Méheut. Magnetohydrodynamic Turbulence in Accretion Discs: A Test Case for Petascale Computing in Astrophysics. Astronum 2014. 498 :10, 2015
M. Joos, P. Hennebelle, A. Ciardi, S. Fromang. The Early Era : How do protostellar discs form? Exploring the Formation and Evolution of Planetary Systems, Proceedings of the International Astronomical Union. 299 :163-164, 2014
M. Joos, P. Hennebelle, A. Ciardi. Protostellar disk formation and transport of angular momentum during magnetized core collapse. Proceedings of "The labyrinth of star formation", 2012