CREON LEVIT Resume and Vita NASA Ames Research Center MS T27-A Moffett Field, CA 94035-1000 (650)-604-4403 creon@nas.nasa.gov www.nas.nasa.gov/~creon

1. (1982-2003) Research scientist at NASA Ames Research Center (Advanced Supercomputing Division). Group lead for exploratory computing environments group. Co-PI on the hyperwall project. Co-founder of the NASA Ames computational molecular nanotechnology group. Areas of expertise are: quantum mechanics, computational chemistry, computational physics, scientific visualization, parallel numerical algorithms, real-time graphics, mathematics, and computer science.

2. (1978-1982) BS with honors in Computer Science. Washington University, St. Louis.

PUBLICATIONS

1. "Are the Bader Laplacian and the Bohm Quantum Potential Equivalent?" Chem. Phys. Lett. 281 (1997) 157-60.

2. "Aerospace applications of molecular nanotechnology," Al Globus, David Bailey, Jie Han, Richard Jaffe, Creon Levit, Ralph Merkle and Deepak Srivastava, Journal of the British Interplanetary Society, in press.

3. "Machine Phase Fullerene Nanotechnology," Al Globus, Charles Bauschlicher, Richard Jaffe, Creon Levit and Deepak Srivastava, Nanotechnology , in press. Also in Proc. Symp. Recent Advances in the Chemistry and Physics of Fullerenes and Related Compounds. K. M. Kadish and R. M. Ruoff, eds. Electrochemical Society. 1997. (1998).

4. "A New Pictorial Approach to Molecular Structure and Reactivity," presented at the First Electronic Molecular Modelling & Graphics Society Conference, October 1996.

5. "Computational Nanotechnology at NASA Ames Research Center, 1996", presented at the First Electronic Molecular Modelling & Graphics Society Conference, October 1996.

6. ``A Parallel, Symplectic Bulirsch-Stoer Integrator for Cellestial Mechanics Applications''. in: Int. Symp. on Integration Algorithms for Cellestial Mechanics, Fields Institute for Research in Mathematical Sciences, Waterloo, Ontario. 1993.

7. ``Simulation of a Moonlet Belt Under the Influence of Multiple Perturbers''. in: Proc. 1993 Annual Meeting of the American Astronomical Society Division of Planetery Sciences, Boulder CO., 1993

8. ``A Multiple-Grid Navier-Stokes Code for the Connection Machine CM-2'', in: Proceedings of the Sixth SIAM Conference on Parallel Processing for Scientific Computing, Norfolk, Virginia, March 1993, pp. 3-7.

9. ``A Multiple Grid Navier-Stokes Solver for the Connection Machine'', in Proc. NASA Computational Aerosciences Conference, NASA Ames Research Center, August 1992.

10. ``The Virtual Windtunnel: An Environment for the Exploration of Three-Dimensional Unsteady Flows'' in: IEEE Computer Graphics and Applications, v12, n4, (July 1992), pp25-34. also in: Proc. IEEE Visualization '91, San Diego CA, Oct. 1991, IEEE Computer Society Press, Los Alamos, CA.

11. ``A Tool for Visualizing the Topology of Three Dimensional Vector Fields.'' In: Proc. IEEE Visualization '91, San Diego CA, Oct. 1991, IEEE Computer Society Press, Los Alamos, CA. Also in: Proc. NASA Ames Computational Fluid Dynamics Conference. Tom Puliam, ed. Moffett Field, CA. March, 1991.

12. ``A Virtual Environment for the Exploration of Three Dimensional Steady Flows.'' in Stereoscopic Displays and Applications II. Scott Fisher, Ed. San Jose, CA. Feb. 1991. SPIE conf. proc. vol. 1457.

13. ``Numerical Simulation of Flow Past a Tapered Cylinder.'' AIAA PAPER AIAA-91-0751, AIAA 29th annual Aerospace Sciences Meeting. Reno, NV. January 1991.

14. ``Are Parallel Systems Ready For Prime Time?'' in International Journal of Supercomputer Applications. 1989.

15. ``Parallel Solution of Pentadiagonal Systems using Generalized Odd-Even Elimination.'' in: Proc. Supercomputing '89, Reno NV, 1989. IEEE Computer Society.

16. ``Grid Communication on the Connection Machine: Analysis, Performance, and Improvements.'' in: International Journal of High Speed Computing, Vol. 1, number 2, pp. 367-381, June 1989. World Scientific, Singapore. Also in: Proc. Conf. on Scientific Applications of the Connection Machine. NASA Ames Research Center (1988). Published by World Scientific, 1989.

17. ``Computational Fluid Dynamics on a Massively Parallel Computer.'' in: International Journal of Supercomputer Applications, Vol 3 number 4 (Winter 1989), pp 9-27, MIT Press, Cambridge MA. Also in: AIAA Paper AIAA-89-1936, 9th Computational Fluid Dynamics Conference, Buffalo, NY., 1989.

18. ``Explicit and Implicit Solution of the Navier-Stokes Equations on a Massively Parallel Computer.'' in: Computers and Structures, vol 30, no 1-2, pp. 385-394, 1988, Pergamon Press, New York, NY. Also in: Symp. on Advances and Trends in Computational Structural Mechanics and Fluid Dynamics, Washington D.C., 1988.

19. ``An Implementation of a Distributed Interactive Graphics System in a Supercomputer Environment.'' in: International Journal of Supercomputer Applications, Vol. 1 number 4, Winter 1987, pp. 82-95, MIT Press, Cambridge MA. Also in: Proc. 2nd Intl. Conf. on Supercomputing, Santa Clara, CA., 1987.

CONFERENCE PRESENTATIONS:

1. "Virtual Mechanosynthesis" presented at: The 1997 Foresight Conference on Molecular Nanotechnology

2. "Fullerene Nanotechnology" presented at: The 1997 Foresight Conference on Molecular Nanotechnology

3. "Structure, reactivity, and bond-order of the reconstructed diamond (100) surface visualized by means of the Laplacian of the electronic charge density" presented at: The 1997 Foresight Conference on Molecular Nanotechnology

4. "Bohm's quantum potential and the visualization of molecular structure" presented at: Causality and Locality in Modern Physics and Astronomy: A Symposium to Honour Jean-Pierre Vigier

5. "A New Pictorial Approach to Molecular Structure and Reactivity." presented at the Symposium On the Occasion of the Sixty-fifth Birthday of Richard F.W. Bader

6. ``Tutorial on Vector Fields, Topology, and Flows'' Presented at IEEE Visualization 92 conference in Boston MA., 1992, and IEEE Visualization 93 conference in San Jose, CA.

7. ``Tutorial on Virtual Environment Implementation Techniques, SIGGRAPH 1992,

8. ``Techniques for Computational Fluid Dynamics on the Connection Machine'' at National Center for Supercomputing Applications (University of Illinois, October 1991),

9. ``Interactive vs. Automatic Analysis of Large Three Dimensional Flow Fields.'' at Workshop on Pattern Discovery in Very Large Databases. NASA Ames Research Center. 1991.

10. ``Advanced techniques for the Visualization of Three-dimensional Flow Fields''. ifbi-Dagstuhl Seminar on Scientific Visualization (Germany, August 1991)

11. ``The Virtual Windtunnel'' presented at: Stanford Industrial Design Forum (Stanford University, December 1990), NASA Lewis Research Center (Cleveland, March 1991), First International Conference on Artificial Reality and Tele-Existance (Tokyo Japan, July 1991), National Center for Supercomputing Applications (University of Illinois, July 1991), SRI Conference on Virtual Reality (Palo Alto, August 1991), 1992 IMAGE VI conference, Scottsdale Arizone. (the Image Society, inc., July 1992)

12. ``Parallel Processing and visualization of Wave Phenomena'' at NASA teacher's conference. September 1990.

13. ``Computation and Visualization of 3D Unsteady Flows on The CM2'' at UCLA Workshop on Connection Machine Applications, 1990.

14. ``Computational Fluid Dynamics and Flow Visualization on The Connection Machine'' at Thinking Machines Corporation, Cambridge, MA. 1989

15. ``Massively Parallel Implicit Flow Solvers'' at 1989 NCSA Workshop on Parallel Computing (Universtity of Illinois, Urbana-Champaign).

16. ``Some New Interactive Techniques For Computational Flow Visualization'' at Conf. on Scientific Applications of the Connection Machine. NASA Ames Research Center, 1988.

HONORS AND ACTIVITIES

1. (1991) Video piece The Virtual Windtunnel was accepted and shown at SIGGRAPH 1991 Electronic Theater.

2. (1994) The Virtual Windtunnel video was included into Best of the Siggraph Electronic Theater 1980-1994 tape. One of only three scientific documentary pieces selected.

3. (1991) ``Best Paper'' award at IEEE Visulization '91 Conference, San Diego, CA.

4. (1989) American Institute of Aeronautics and Astronautics (San Francisco Bay Area Chapter): Engineer of the Year Award.

5. (1986) NASA Group Achievent Award, for work on Numerical Aerodynamic Simulation Project.

6. (1984) NASA Sustained Superior Performance Award: ``... You have exceeded the standards set for your position... Outstanding work.''

7. (1992) Invited and served on NASA Intercenter committee on virtual environments research. Responsible for summary report.

8. (1991) Invited and served on NASA HPCC (High Performance Computing and Communication) grant proposal review panel for space and planetary sciences.

9. (1990-91) Invited and served twice on NSF grant proposal review panels for HPCC grants at NSF headquarters in Washinton DC. Grants were for two to four million dollars each.

10. (1989-1998) Reviewer for NSF and NASA research grant proposals, SIGGRAPH 92-94, IEEE computer and IEEE computer graphics and applications.

11. (1998) Ames spotlight award for "visualization of the chemical bond"

12. (1997) Co-receipient of the 1997 Feynman Prize in nanotechnology.

PROGRAMMING

1. Designed and Implemented (with Dennis Jespersen) cm3d, a general purpose multi-zone three dimensional factored implicit Navier-Stokes solver for the connection machine cm2 and cm5.

2. Designed and Implemented (with Dennis Jespersen) a version of ARC2D in *lisp for the CM2. It supported explicit, scalar implicit, and block implicit options. It was the first implicit CFD code on the CM2.

3. Co-designer and Co-implementator (with Steve Bryson) of the Virtual Windtunnel software. This includes software for both steady and unsteady three dimensional flows.

4. Designed and implemented software for George Coates Performance Works Multi-media theater presentation Invisible Site and The Desert Music.

5. Designed and implemented CPT, a program for the interactive analysis of two-dimensional unsteady flows. It produces, in real time, animations of streaklines, streamlines, particle paths, countour plots, dye advection, and flow topology.

6. Designed and Implemented Flow Topology visulalization module for FAST. (with Al Globus and Tom Lasinski).

7. Designed and Implemented 3D unsteady flow visualization software for the CM2. This software can render unsteady streaklines and streaksurfaces colored by a variety of functions. Videotapes shown at several meetings.

8. Designed and Implemented (with Dennis Jespersen) a 3D compressible Navier-Stokes code for the CM2. It supports explicit and scalar implicit, options. It was (to my knowledge) the first 3D implicit CFD code on the CM2.

9. Designed, implemented, and tested a new parallel algorithm for the parallel solution of pentadiagonal systems.

10. Designed and implemented CPLANE, the first truly interactive flow visualization software at NASA Ames. It was the impetus for the Panel Library, and was the forerunner of many programs, including FAST.

11. Designed and implemented EPLANE (with Eric Raible), a program for the exploration and automatic topological analysis of two dimensional continuous dynamical systems.

12. Designed and implemeted ESPACE, a program for the exploration and automatic topological analysis of three dimensional continuous dynamical systems.

13. Participated in the design of the panel library, panel editor, and FAST cfd calculator module.

14. Implemented real-time 2D scalar wave equation code on the CM2 (for fun). Images from this program were included on the thinking machines ``Best of Visualization'' tape. Videotapes generated by this program are distributed by the NASA Ames teachers resource center.