Stanford University
PhD in Computer Science, April 2007
MS in Computer Science, September 2004
Texas A&M University
BS in Computer Science, May 2002
Minors in Electrical Engineering, Mathematics, Chemistry
El Paso Franklin High School
Diploma, 1998
Data-Parallel Algorithms, Visualization, and Analysis for Large-Scale Scientific Simulations
Los Alamos National Laboratory, Los Alamos, New Mexico
May 2011 - January 2017
My LANL webpage
Data Science at Scale Team
VTK-m webpage
Ptychography at the Linac Coherent Light Source in a Parasitic Geometry. Benjamin A. Pound, Kevin M. Mertes, Adra V. Carr, Matthew H. Seaberg, Mark S. Hunter, William C. Ward, James F. Hunter, Christine M. Sweeney, Christopher M. Sewell, Nina R. Weisse-Bernstein, J. Kevin S. Baldwin, and Richard L. Sandberg. To appear in Journal of Applied Crystallography.
Portable Data-Parallel Surface Reconstruction on a Uniform Rectilinear Grid. Marianne Francois, Li-Ta Lo, Christopher Sewell, and Jan Velechovsky. International Journal for Numerical Methods in Fluids. August 2017. Link
Achieving Portable Performance for Wavelet Compression Using Data Parallel Primitives. Shaomeng Li, Nicole Marsaglia, Vincent Chen, Christopher Sewell, John Clyne, and Hank Childs. Proceedings of the Eurographics Symposium on Parallel Graphics and Visualization (EGPGV). June 2017. Barcelona, Spain.
Parallel Peak Pruning for Scalable SMP Contour Tree Computation. Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens. Proceedings of the IEEE Symposium on Large Data Analysis and Visualization (LDAV). October 2016. Baltimore, Maryland. Best Paper Award. Link
Introduction to Portage. Angela Herring, Ondrej Certik, Charles Ferenbaugh, Rao Garmella, Brian Jean, Christopher Malone, and Christopher Sewell. Proceedings of NECDC 2016.
Hybrid Data-Parallel Contour Tree Computation. Hamish Carr, Christopher Sewell, Li-Ta Lo, and James Ahrens. Proceedings of the Computer Graphics and Visual Computing Conference. September 2016. Bournemouth, England.
VTK-m: Accelerating the Visualization Toolkit for Massively Threaded Architectures. Kenneth Moreland, Christopher Sewell, William Usher, Li-ta Lo, Jeremy Meredith, David Pugmire, James Kress, Hendrik Schroots, Kwan-Liu Ma, Hank Childs, Matthew Larsen, Chun-Ming Chen, Robert Maynard, and Berk Geveci. IEEE Computer Graphics and Applications. May/June 2016. Link
Adapting the Visualization Toolkit for Many-Core Processors with the VTK-m Library. Presentation with Robert Maynard at the GPU Technology Conference. April 2016. San Jose, California. Link
Reporting on the Technical Specification for C++ Extensions for Parallelism. Presentation at the Programming Models and Co-Design Meeting. February 2016. Los Alamos, New Mexico.
Large-Scale Compute-Intensive Analysis via a Combined In-situ and Co-scheduling Workflow Approach. Christopher Sewell, Katrin Heitmann, Hal Finkel, George Zagaris, Suzanne T. Parete-Koon, Patricia K. Fasel, Adrian Pope, Nicholas Frontiere, Li-ta Lo, Bronson Messer, Salman Habib, and James Ahrens. Proceedings of The International Conference for High Performance Computing, Networking, Storage, and Analysis. November 2015. Austin, Texas. Link
Utilizing Many-Core Accelerators for Halo and Center Finding within a Cosmology Simulation. Christopher Sewell, Li-ta Lo, Katrin Heitmann, Salman Habib, and James Ahrens. Proceedings of the IEEE Symposium on Large Data Analysis and Visualization (LDAV). October 2015. Chicago, IL. Link
The Q Continuum Simulation: Harnessing the Power of GPU Accelerated Supercomputers. Katrin Heitmann, Nicholas Frontiere, Christopher Sewell, Salman Habib, Adrian Pope, Hal Finkel, Silvio Rizzi, Joe Insley, and Suman Bhattacharya. Astrophysical Journal Supplement Series, 219(34). August 2015. Link
GPU-Accelerated Cosmological Analysis on the Titan Supercomputer. Blog post at Nvidia's Parallel for All Blog. July 2015. Link
Visualization and Analysis of Large-Scale Atomistic Simulations of Plasma-Surface Interactions. Wathsala Widanagamaachchi, Karl Hammond, Li-ta Lo, Brian Wirth, Francesca Samsel, Christopher Sewell, James Ahrens, and Valerio Pascucci. Proceedings of EuroVis (short paper). May 2015. Cagliari, Italy. Link
Portable Data-Parallel Algorithms for Scientific Applications. Presentation at the Department of Energy Computer Graphics Forum. April 2015. Newport, Rhode Island.
Data-Parallel Halo Finding with Variable Linking Lengths. Wathsala Widanagamaachchi, Peer-Timo Bremer, Christopher Sewell, Li-ta Lo, James Ahrens, and Valerio Pascucci. Proceedings of the IEEE Symposium on Large-Scale Data Analysis and Visualization (LDAV). November 2014. Paris, France. Link
Volume-of-Fluid Interface Reconstruction Algorithms on Next Generation Computer Architectures. Marianne M. Francois, Li-ta Lo, and Christopher Sewell. Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting and 12th International Conference on Nanochannels, Microchannels, and Minichannels. August 2014. Chicago, IL. Link
Data-Parallel Programming with PISTON and PINION. Presentation at the Programming Models and Applications Meeting. August 2014. Albuquerque, New Mexico.
Portable Parallel Halo and Center Finders for HACC. Presentation at the Oak Ridge Leadership Computing Facility Users' Meeting. July 2014. Oak Ridge, Tennessee. Link
PISTON. Guest lectures for Professor Hank Childs' multi-core parallel programming graduate class at the University of Oregon. January 2014. Link
Portable Data-Parallel Visualization and Analysis in Distributed Memory Environments. Christopher Sewell, Li-ta Lo, and James Ahrens. Proceedings of the IEEE Symposium on Large-Scale Data Analysis and Visualization (LDAV). October 2013. Atlanta, GA. Link
Research Challenges for Visualization Software. Hank Childs, Berk Geveci, Will Schroeder, Jeremy Meredith, Kenneth Moreland, Christopher Sewell, Torsten Kuhlen, and E. Wes Bethel. Computer Magazine. May 2013. pp. 34-42. Link
Portable Data-Parallel Visualization and Analysis Operators. Presentation at the GPU Technology Conference. March 2013. San Jose, California. Link
The SDAV Software Frameworks for Visualization and Analysis on Next-Generation Multi-Core Architectures. Christopher Sewell, Jeremy Meredith, Kenneth Moreland, Tom Peterka, Dave DeMarle, Li-ta Lo, James Ahrens, Robert Maynard, and Berk Geveci. The Seventh Workshop on Ultrascale Visualization at The International Conference for High-Performance Computing, Networking, Storage, and Analysis. November 2012. Salt Lake City, Utah. Link
The PISTON Software Framework for Visualization and Analysis on Next-Generation Multi-Core Architectures. Presentation at the Visualization Frameworks for Multi-Core and Many-Core Architectures Panel at The International Conference for High Performance Computing, Networking, Storage, and Analysis. November 2012. Salt Lake City, Utah.
Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework. Presentation at the Many-Core Libraries Tutorial and Code Sprint. September 2012. Clifton Park, New York.
PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators. Li-ta Lo, Christopher Sewell, and James Ahrens. EGPGV: Proceedings of the Eurographics Symposium on Parallel Graphics and Visualization 2012. May 2012. Cagliari, Italy. Link
Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework. Presentation at the Accelerated High Performance Computing Symposium at the GPU Technology Conference. May 2012. San Jose, California.
Portability and Performance for Visualization and Analysis Operators Using the Data-Parallel PISTON Framework. Presentation at the Department of Energy Computer Graphics Forum. April 2012. Albuquerque, New Mexico.
PISTON: A Portable Cross-Platform Framework for Data-Parallel Visualization Operators. Presentation at the Workshop on Ultrascale Visualization at the International Conference for High-Performance Computing, Networking, Storage, and Analysis. November 2011. Seattle, Washington.
Medical Robotics
Intuitive Surgical, Sunnyvale, California
January 2017 - Present
Consultant for several Bay Area medical device companies
June 2011 - January 2017
Hansen Medical, Mountain View, California
April 2007 - April 2011
Surgical Simulation and Haptics
Advisor: Professor Ken Salisbury
Stanford Computer Science and Surgery
March 2003 to March 2007
Salisbury Group Homepage
Stanford AI and Robotics Lab Homepage
Computer Haptics and Active Interfaces Project Page
For videos and pictures see the Stanford Bone Simulation Page
and the Stanford Challenge video
Providing Metrics and Performance Feedback in a Surgical Simulator. Christopher Sewell, Dan Morris, Nikolas H. Blevins, Sanjeev Dutta, Sumit Agrawal, Federico Barbagli, and Kenneth Salisbury. Computer Aided Surgery, Volume 13 Issue 2, March 2008, pp. 63-81. Link
Representing Fluid with Smoothed Particle Hydrodynamics in a Cranial Base Simulator. Wen Liu, Christopher Sewell, Nikolas Blevins, Kenneth Salisbury, Kenneth Bodin, and Nils Hjelte. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2008. Link
Automatic Performance Evaluation in Surgical Simulation. Christopher Sewell. PhD Dissertation, Stanford University, March 2007.
The Effect of Virtual Haptic Training on Real Surgical Drilling Proficiency. Christopher Sewell, Nikolas H. Blevins, Sumanth Peddamatham, Hong Z. Tan, Dan Morris, and Kenneth Salisbury. Proc. of IEEE World Haptics Conference, Tsukuba, Japan, March 2007, pp. 601-603. Link
Validating Metrics for a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Sumit Agrawal, Sanjeev Dutta, Federico Barbagli and Kenneth Salisbury. Proc. of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2007, IOS Press, pp. 421-426. Link
Evaluating Drilling and Suctioning Technique in a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli and Kenneth Salisbury. Proc. of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, February 2007, IOS Press, pp. 427-432. Link
Visuohaptic Simulation of Bone Surgery for Training and Evaluation. Dan Morris, Christopher Sewell, Federico Barbagli, Nikolas Blevins, Sabine Girod, and Kenneth Salisbury. IEEE Transactions on Computer Graphics and Applications, November 2006, pp. 48-57. Link
Achieving Proper Exposure in Surgical Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli and Kenneth Salisbury. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, January 2006, IOS Press, pp. 497-502. Link
Metrics for a Mastoidectomy Simulator. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Poster at the Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2005.
CHAI: An Open-Source Library for the Rapid Development of Haptic Scenes. Francois Conti, Federico Barbagli, Dan Morris, and Christopher Sewell. Demo at World Haptics, Pisa, Italy, March 2005.
A Simulator for Training a Full Mastoidectomy Procedure. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Demo at World Haptics, Pisa, Italy, March 2005.
Quantifying Risky Behavior in Surgical Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of Medicine Meets Virtual Reality (MMVR), Long Beach, CA, January 2005, IOS Press, pp. 451-457. Link
Training the Cognitive and Stylistic Aspects of Surgery Through Simulation. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Poster at the Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2004. Best Poster Award.
A Collaborative Virtual Environment for the Simulation of Temporal Bone Surgery. Dan Morris, Christopher Sewell, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Poster at the Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2004.
An Event-Driven Framework for the Simulation of Complex Surgical Procedures. Christopher Sewell, Dan Morris, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of the International Conference on Medical Imaging Computing and Computer Assisted Intervention (MICCAI), St. Malo, France, September 2004, Springer Lecture Notes in Computer Science, Vol. II, pp. 346-354. Link
A Collaborative Virtual Environment for the Simulation of Temporal Bone Surgery. Dan Morris, Christopher Sewell, Nikolas Blevins, Federico Barbagli, and Kenneth Salisbury. Proceedings of the International Conference on Medical Imaging Computing and Computer Assisted Intervention (MICCAI), St. Malo, France, September 2004, Springer Lecture Notes in Computer Science, Vol. II, pp. 319-327. Link
Haptic Interaction to Simulate Complex Surgical Procedures. Christopher Sewell, Kenneth Salisbury, Federico Barbagli, Tom Krummel, and Jean-Claude Latombe. Biomedical Computation at Stanford Symposium (BCATS), Stanford, CA, October 2003.
Proofs for the A* Search Algorithm Slides
Using CHAI for Developing Haptic Applications Slides
The God-Object / Proxy Haptic Rendering Algorithm, including Friction, Force Shading, and Textures Slides
Deformable Modeling Slides
Collision Detection Slides
Haptic Audio Slides
Protein Sequencing
Advisor: Dr. Olaf Lubeck
Los Alamos National Lab
May 2002 to August 2002
New Computational Approaches for De Novo Peptide Sequencing from MS/MS Experiments. Olaf Lubeck, Christopher Sewell, Sheng Gu, and Xian Chen. IEEE Proc. on Challenges in Biomedical Informatics, 2002, 90(12), 1868-1874. Link
Algorithm for Sequencing Proteins Using Mass Spectrometry Data. Oral presentation at Los Alamos National Laboratory Symposium, Los Alamos, NM, July 2002.
Computational Chemistry and Cell Modeling
Advisor: Professor Paul Lindahl
Texas A&M Chemistry
December 1998 to May 2002
Lindahl Group Homepage
Reduction and Methyl Transfer Kinetics of the Alpha Subunit from Acetyl Coenzyme A Synthase. Xiangshi Tan, Christopher Sewell, Qingwu Yang, Paul A. Lindahl. J. Am. Chem. Soc. (Comm.), 2003, 125(2), 318-319. Link
Analysis of Protein Homeostatic Regulatory Mechanisms in Perturbed Environments at Steady State. Christopher Sewell, Jeffrey J Morgan, and Paul A Lindahl. J. of Theoretical Bio. 2002, 215, 151-167. Link
Stopped-Flow Kinetics of the Methyl Group Transfer between Acetyl-Coenzyme A Synthase and the Corrinoid-Iron-Sulfur Protein from Clostridium thermoaceticum. Xiangshi Tan, Christopher Sewell, and Paul A. Lindahl. J. Am. Chem. Soc., June 2002, 124(22), 6277-6284. Link
Method for Modeling Complex Biochemical Processes from Semi-Fabricated Concentration-vs-Time Plots of All Reacting Components. Poster presentation at the Pfizer Chemical Undergraduate Research Symposium, Groton, CT, April 2002.
Method for Modeling Complex Biochemical Processes from Semi-Fabricated Concentration-vs-Time Plots of All Reacting Components. Presentation at the Texas A&M Student Research Week Symposium, College Station, TX, March 2002.
Kinetic Mechanism of Acetyl-CoA Synthase: Steady-State Synthesis at Variable CO/CO2 Pressures. Ernest L. Maynard, Christopher Sewell, and Paul A. Lindahl. J. Am. Chem. Soc., May 2001, 123(20), 4697-4703. Link
Analysis of Steady-State Protein Homeostatic Regulatory Mechanisms in Perturbed Environments. Christopher Sewell, Jeffrey J. Morgan, and Paul A. Lindahl. Poster presentation at the International Conference on Systems Biology, Pasadena, California, November 2001.
Method for Simulating the Kinetics of Cell Growth and Division at the Molecular Level. Christopher Sewell, Charles Johnson, Jeffrey J. Morgan, and Paul A. Lindahl. Poster presentation at the International Conference on Systems Biology, Pasadena, California, November 2001.
The Biocomplexity Project. Christopher Sewell. Undergraduate Honors Thesis, Texas A&M University, May 2001.
Analysis of Regulatory Mechanisms. Presentation at the Texas A&M Undergraduate Research Fellows Symposium, College Station, TX, April 2001.
Protein Folding
Advisor: Professor Nancy Amato
Texas A&M Computer Science
May 2001 to May 2002
Parasol Group Homepage
Contributed to Using Motion Planning to Map Protein Folding Landscapes and Analyze Folding Kinetics of Known Native Structures. Nancy Amato, Ken Dill, and Guang Song, Proceedings of the Sixth Annual Int'l Conf. on Computational Molecular Biology (RECOMB), April 2002, 2-11. (Not an author; mentioned in acknowledgements.) Link
Supercomputer Efficiency
El Paso Franklin High School and Lincoln Middle School
November 1993 to May 1998
Supercomputer Parallel Architectures: A Fifth-Year Study of Supercomputer Efficiency. Oral presentation at the National Junior Science and Humanities Symposium, Raleigh, NC, April 1998, and poster presentation at the Intel International Science and Engineering Fair, Fort Worth, TX, May 1998.