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Khachik V. Sargsyan

Contact
Information

Sandia National Laboratories

Home: (734) 730-7454

Transportation Energy Center

Work: (925) 294-4885

Reacting Flow Research Department

Fax: (925) 294-2595

7011 East Ave, MS 9051

E-mail: ksargsy@sandia.gov

Livermore, CA 94550

Web: www.umich.edu/~ksargsya

Education

University of Michigan, Ann Arbor, MI, USA

Ph.D., Applied and Interdisciplinary Mathematics, August, 2007.

· Dissertation Topic: "Mean First Passage Times in the Near-Continuum Limit of Birth-

Death Processes".

· Advisor: Charles R. Doering.

Moscow Institute of Physics and Technology, Moscow, Russia

B.S., Applied Physics and Mathematics, June, 2001.

Fellowships,
Awards,
Olympiads

Geophysical Fluid Dynamics Summer Program Fellow, Woods Hole Oceanographic Institu-
tion, 2005.

Mathematics Department Summer Fellowship, University of Michigan, 2003.

MIPT Students' Math Olympiad, 3rd prize, 1998.

Soros Student Grant, Soros Foundation, 1997.

Gold Medal for extraordinary successes in high school, 1997.

International Math Olympiad, Mar-del-Plata, Argentine, bronze medal, 1997.

Tournament of the Cities, Commonwealth of Independent States, 1st prize, 1996.

International Math Olympiad, Bombay, India, honorable mention, 1996.

Teaching
Experience

University of Michigan, Ann Arbor, MI, USA

· Graduate Student Instructor

September, 2006 - May, 2007

Teaching Calculus I, Fall 2006, Winter 2007. Full responsibility for lectures, discussion
sessions, homework assignments, quizzes.

· Graduate Student Instructor

September, 2002 - May, 2003

Taught Precalculus, Fall 2002, Winter 2003. Full responsibility for lectures, discussion
sessions, homework assignments, quizzes.

· Private Tutor

2003 - 2005

Tutored undergraduate-level Number Theory, Numerical Methods, Probability Theory,
Abstract Algebra, Linear Algebra, Partial Differential Equations, Mathematical Biology,
Mathematical Logic, Honors Calculus.

· Grader

2003 - 2005

Math 354 Fourier Analysis and its Applications (Winter 2003),
Math 454 Boundary Value Problems for Partial Differential Equations (Spring 2003),
Math 351 Principles of Analysis (Winter 2004),
Math 556 Methods of Applied Mathematics (Fall 2005).

Khachik V. Sargsyan

Research
Interests

· General: Stochastic processes, statistical analysis, numerical methods with applications

in biochemistry, statistical physics, population dynamics, climate modeling.

· Specific: Numerical stochastic methods, uncertainty quantification, model reduction,

Bayesian inference, multiscale modeling, large deviations.

Research
Experience

Sandia National Laboratories, Livermore, CA, USA

· Postdoctoral Appointee

July, 2007 - present

"Uncertainty Quantification in Stochastic Dynamical Systems", DOE ASCR (leading
contributor).
"Uncertainty Quantification for Large Scale Ocean Circulation Predictions", Sandia
Labs' Senior's Counsil LDRD (leading contributor).
"Quantifying the Margin of High-Consequence Climate Change", NNSA BER, Sandia
subtask (leading contributor).
"Analysis of Stochasticity in Immune System Signaling Pathways", Sandia Labs' LDRD.

University of Michigan, Ann Arbor, MI, USA

· Graduate Student Research Assistant

September, 2003 - August, 2006

Supported by NSF and Michigan Center for Theoretical Physics. Member of the 3-year
NSF research project group "Fronts, Fluctuations and Growth".

Moscow Institute of Physics and Technology, Moscow, Russia

· Research Project Member

2001 - 2002

Institute for System Programming of Russian Academy of Sciences.

· Research Assistant

1999 - 2001

Institute for Computer Aided Design of Russian Academy of Sciences.

Journal Papers

· Khachik V. Sargsyan, Bert J. Debusschere, Habib N. Najm and Olivier Le Ma^itre, "Spec-

tral representation and reduced order modeling of the dynamics of stochastic reaction
networks via adaptive data partitioning". SIAM Journal on Scientific Computing, ac-
cepted, 2009.

· Khachik V. Sargsyan, Bert J. Debusschere, Habib N. Najm and Youssef M. Marzouk,

"Bayesian inference of spectral expansions for predictability assessment in stochastic re-
action networks". Journal of Computational and Theoretical Nanoscience, 6:10, 2009.

· Charles R. Doering, Khachik V. Sargsyan, Leonard M. Sander and Eric Vanden-Eijnden,

"Asymptotics of rare events in birth-death processes bypassing the exact solutions".
Journal of Physics: Condensed Matter, 19:6, 2007.

· Charles R. Doering, Khachik V. Sargsyan and Peter Smereka, "A numerical method

for some stochastic differential equations with multiplicative noise". Physics Letters A,
344:2-4, 2005, pp.149-155.

· Charles R. Doering, Khachik V. Sargsyan and Leonard M. Sander, "Extinction times

for birth-death processes: exact results, continuum asymptotics, and the failure of the
Fokker-Planck approximation". SIAM Journal on Multiscale Modeling and Simulation,
3:2, 2005, pp.283-299.

Conference
Papers

· Khachik V. Sargsyan, "Fluctuations in chemical reactions in a large volume". Proc. of

Geophysical Fluid Dynamics Program, Woods Hole Oceanographic Institution, 2005.

· Khachik V. Sargsyan, Bert J. Debusschere and Habib N. Najm, "Spectral Representation

and Reduced Order Modeling of Stochastic Reaction Networks". Model Reduction in
Reacting Flows, Workshop Proceedings, University of Notre Dame, 2009.

Selected Talks,
Reports,
Presentations

· "Spectral Representation and Reduced Order Modeling of Stochastic Reaction Net-

works". International Workshop on Model Reduction in Reacting Flows, University of
Notre Dame, IN, USA. April, 2009.

· "Predictability Assessment in Stochastic Reaction Networks". SIAM Annual Meeting,

Minisymposium on Uncertainty Quantification, San Diego, CA, USA. July, 2008.

· "Mean First Passage Times and their Asymptotics for Markov Jump Processes". Ap-

plied and Interdisciplinary Mathematics Student Seminar, University of Michigan, Ann
Arbor, MI, USA. March, 2007.

· "Rare Events in Stochastic Systems". Invited Talk, Biological and Energy Sciences Cen-

ter, Sandia National Laboratories, Livermore, CA, USA. March, 2007.

· "Rare Events in Stochastic Systems". Invited Talk, Department of Applied Physics and

Applied Mathematics, Columbia University, New York, NY, USA. January, 2007.

· "Fluctuations in chemical reactions in a large volume". Geophysical Fluid Dynamics

Program, Woods Hole Oceanographic Institution, Woods Hole, MA, USA. August, 2005.

Other
Conferences,
Workshops,
Academic
Activities

· Refereed for Physics Letters A.

· SIAM CSE Meeting, Miami, FL. March, 2009.

· Applied Mathematics Principal Investigators Meeting, Argonne National Laboratory, Ar-

gonne, IL. October, 2008.

· Opportunities and Challenges in Applying Polynomial Chaos Expansions to Engineering

Design and Analysis, University of Southern California, Los Angeles, CA. August, 2008.

· Uncertainty Analysis in Complex, Multi-Physics Applications, Stanford University, Stan-

ford, CA. July, 2008.

· International Conference on Systems Biology, Long Beach, CA. October, 2007.

· Funded academic visit, Prof. Eric Vanden-Eijnden (currently at Courant Institute), De-

partment of Mathematics, University of California, Berkeley. May, 2006.

· Stochastic and Statistical Parametrization of Unresolved Features in the Atmosphere and

Upper Ocean, National Center for Atmospheric Research, Boulder, CO. March, 2006.

· Biological systems and soft materials: Future directions in statistical physics. A sym-

posium on the interface of statistical physics, biology, and chemistry, Virginia Tech,
Blacksburg, VA. March, 2004.

· GSI Workshop for international graduate student instructors, Center for Research on

Learning and Teaching/English Language Institute, Ann Arbor, MI. August, 2002.