As a numerical analyst, I focus on algorithmic development for large-scale software. Following my PhD, I have been affiliated with several large-scale software projects. My approach is to identify numerical issues, i.e. efficiency and accuracy losses, in various applications and seek to develop methods that address these problems. The methods I have been working on were designed to be scalable and ultimately integrated into the software I am affiliated with or ported independently.
Education
- 2003 - University of Bucharest (Romania) - BSc in Mathematics
- 2007 - Royal Institute of Technology (Sweden) - MSc Numerical Analysis
- 2012 - Royal Institute of Technology (Sweden) - PhD Numerical Analysis
Professional
- 2013 - 2016 Argonne National Laboratory - Nek5000
- 2017 - 2022 Argonne National Laboratory - PETSc
- 2022 - present Idaho National Laboratory - MOOSE
I have been affiliated with the following software projects
Scientific community service work- Editorial board of SIAM News
- Course design - PETSc for PDEs (NASA 2019)
- Popular science contributions
- Panelist - NSF
- Mentor - SuperComputing
- Minisymposiums organizer: SIAM CSE, SIAM UQ, JMM etc.
Areas of research I have been active in, and selected publications
- High Performance Computing
- On the strong scaling of the spectral element solver Nek5000 on petascale systems
- The PetscSF scalable communication layer
- Large-scale lossy data compression based on an a priori error estimator in a spectral element code
- PDE-constrained optimization
- A scalable matrix-free spectral element approach for unsteady PDE constrained optimization using PETSc/TAO
- Asynchronous two-level checkpointing scheme for large-scale adjoints in the spectral-element solver Nek5000
- Computing Derivatives for PETSc Adjoint Solvers using Algorithmic Differentiation
- Machine learning, data analysis and statistics
- Fitting Matérn smoothness parameters using automatic differentiation
- Informed knot placement schemes for B-spline approximation
- Fourier neural networks as function approximators and differential equation solvers
- CFD Software and Simulations
Emails
- Work: oana.marin@inl.gov
- Personal: oana_marin@outlook.com