Leesa Brieger
home: (858) 560-0328, work: (858) 534-6264, email:
leesa.brieger@gmail.com
Profile
With the background of computational scientist,
I have carried out applications development in scientific research labs in
Europe and the
Experience
Summary
Developed production code for oil and gas
prospecting for the Italian oil industry, bringing HPC expertise to exploration
geophysicists. Designed and
implemented numerical models and high performance simulations for fluid flow in
porous media (in hydrology and materials science), seismic imaging (oil
exploration), electrical activity in an excitable
medium (cardiology). Optimized numerical
methods for parallel computing environments on distributed- and shared-memory
machines: finite elements with algebraic domain decomposition, parallel
multigrid preconditioners for the conjugate gradient method, spectral methods, lattice gases. Developed workflow software
to transform on-demand astronomical mosaicking services into a very large-scale
production package. Testing and
troubleshooting of new and experimental systems (IBM Power4, GPFS parallel file
system, TeraGrid IA64 clusters, grid services, etc). Extensive
support for American computational scientists as NPACI consultant, including
giving tutorials and workshops on grid computing. Currently handling
data management and preservation environments for very large distributed data
sets.
F90, C, MPI, OpenMP, HPF, MPI I/O, VMI,
MPICH-G2, Globus, Condor, SRB, Perl, Python, MYMPI, AWK.
Detailed Work History
(SRB, Scientific Applications, Grid Applications,
and Parallel Tools groups)
Programmer Analyst Nov 2000 – Nov 2001,
July 2002 – currently
Acting NPACI Project Manager Nov 2001- June 2002
Invited by SDSC
directors to step in as interim Project Manager for the National Partnership
for Advanced Computational Infrastructure (NPACI) when NPACI was the main
funding source of SDSC. Oversaw the several-month
transition period between NPACI Executive Directors and kept operations going
smoothly.
Directed a group of three other staff members
dedicated to administrative support of the NPACI project.
Document and Proposal Writing, SDSC
·
Invited contributor to the User Services section of
the core CyberInfrastructure proposal, submitted by SDSC to the National Science
Foundation for the 3-year funding extension of the NPACI program, 2005 –
2007. Funded.
·
Two internal SDSC Innovation Proposals, both portal
projects: one a User Services portal for aid in troubleshooting grid services, the
other a Window on the Grid project to educate users about (grid) resources at
SDSC. One and a half years later SDSC
User Services division is setting up portals as described in my proposals.
·
Application Portability proposal for a portable
Fortran library and SPMD Collective Communication Module proposal, submitted by
Tim Kaiser and the Parallel Tools group to the Department of Defense,
2001. Both funded by DoD High
Performance Computing Modernization Program (HPCMP) Programming Environment and
Training (PET) activities through
·
SDSC User Services internal report on user
requirements, based on the analysis of user interviews, 2001.
Center for Advanced Studies, Research and Development in
(All work conducted in Italian.)
Senior Researcher, Geophysics Area 1997 - 2000
·
ENI Exploration and Production Division (AGIP)
Project: Wrote the computational kernel to an industrial 3D wave propagation
seismic imaging code, giving ENI a competitive edge in oil exploration. Brought
HPC expertise to exploration geophysicists, and contributed in an important way
to the introduction of parallel and high performance computing technology to
ENI. Collaborated with ENI geophysicists to optimize codes for the SGI
shared-memory Origin 2000.
·
Parallel Computer Project: Co-responsible for
evaluation and choice of technology to meet CRS4 computing needs (and budget);
our recommendation was the basis for the purchase of an IBM SP3 at CRS4.
Senior Researcher and Consultant, Environmental Modeling Area 1993 - 1997
·
Hydrology and Water Management Project: parallelization
and optimization of finite element flow and transport models using algebraic
domain decomposition to map the nonlinear computational problem onto
distributed-memory architectures.
·
Director to junior researcher on parallel linear
solvers: study of parallel preconditioners for conjugate gradient solvers of
sparse systems arising from finite element applications; development and
implementation (using F90 with MPI) of a parallel multigrid preconditioner for
the conjugate gradient method.
·
Director of master’s thesis: directed two visiting
student researchers from ENSAM,
Ecole
Polytechnique Fédérale de Lausanne (EPFL),
(All work conducted in
French.)
Staff Scientist, Institut de
machines hydrauliques et de mécaniques des fluides, 1991 - 1992
Developed and implemented lattice gas models as
parallel algorithms for solving equations of diffusion with reaction and
diffusion with convection.
Assistante, Département de
Mathématiques, 1987 - 1990
Held
the discussion sections for undergraduate numerical analysis course; continued
lattice gas research begun in the materials science department.
Research Assistant, Département de
Matériaux, 1984 - 1988
Developed numerical simulations of the
corrosion of reinforced concrete by carbonation: finite element and lattice gas
models. Presentations of the work included
to mechanical engineers at the Ecole des Ponts et
Chausées, Paris.
Los Alamos National Laboratory,
Summer visitor, Center for
Non-Linear Studies (CNLS), Summer 1990
Pursued research on cellular automata and
lattice gas models
Cardiovascular Research & Training Institute, Univ of
Research Assistant 1982 - 1983
Provided scientific
programming as required in the cardiac research lab: graphics, software tools
for diagnostics on ECG data and for computer interface to laboratory equipment. Collaborated with Dr. James
P. Keener, Dept. of Math,
Department of Mathematics,
Teaching Fellow 1979 - 1982
Taught calculus and
Fortran77, assistant for graduate level numerical analysis courses.
Education
·
M.A., Applied mathematics: numerical analysis,
mathematical modeling, 1982 University of Utah, Salt Lake City, Utah.
·
A.B., Mathematics, 1977,