About Me
I am a computational scientist at ORNL. I divide my time
between the Scientific Computing group at the National Center for
Computational Sciences and the Computational Mathematics group in the
Computer Science and Mathematics division. Previously, I was
a postdoc working for George Fann in the math group. I
started
working here as a postdoc in September 2005, and became a staff member
in September 2007.
I obtained my Ph.D. in
Computer
Science with a certificate in
Computational Science and
Engineering from the
University
of Illinois at Urbana-Champaign in 2005. I was a
student of
Mike
Heath in the
Scientific
Computing group. The title of my dissertation is
"The Diffusion Equation Method for Global Optimization and Its
Application to Magnetotelluric Geoprospecting." Way back
before that, I earned a B.S. in
Physics
from the
University of
Kentucky.
These days, I have been working on load balancing techniques for the
octtrees in
MADNESS.
On a leadership supercomputer (such as
Jaguar,
ORNL's flagship machine), we want to evenly distribute the load over
hundreds or even thousands of processors, while minimizing the number
of broken links. Something that makes our load balancing
requirements unique is the fact that we utilize the whole tree for some
operations, rather than just the leaf nodes. I have come up
with some ideas that suit our purposes. For more about our
project, see our
SCIDAC
project web page.
See my CV (
short) (
long) for more information
about me.
Research Interests
My research interests include
- Inverse and ill-posed problems
- Load balancing at the petascale and above
- Optimization
- Scientific computing
- Supercomputing
Links
Last updated September 18,
2007
hartmanbakrj@ornl.gov