James R. Stewart

Computing Research

Author profile picture

Computing Research

jrstewa@sandia.gov

(505) 844-8630

Sandia National Laboratories, New Mexico
 P.O. Box 5800
 Albuquerque, NM 87185-1318

Biography

Since March 2022, Jim has served as the Acting Director of Sandia’s Center for Computing Research. From 2017-2022, he served as the Senior Manager of the Computational Sciences and Math Group, and previously served as Manager of the Optimization and Uncertainty Quantification Department and the Advanced Computational Mechanics Architectures Department. Jim is Sandia’s lead for the DOE Office of Science Advanced Scientific Computing Research (ASCR) program, which includes programmatic responsibility for Sandia’s Exascale Computing Project (ECP). He also leads Sandia’s Advanced Technology Development and Mitigation (ATDM) subprogram, which is part of DOE’s Advanced Simulation and Computing (ASC) program for stockpile stewardship. He has led major software development teams including the Dakota optimization and uncertainty quantification toolkit team, as well as the SIERRA computational mechanics framework team. 

Education

Jim holds a Ph.D. in Mechanical Engineering from Stanford University and B.S. and M.S. degrees in Mechanical Engineering from the University of Illinois at Urbana-Champaign. He has previous experience at NASA Langley Research Center and joined Sandia after a short stint at Object Reservoir, Inc., a start-up company in Austin, TX focused on reservoir modeling. He has served on the Executive Council of the U.S. Association for Computational Mechanics (USACM) and chaired the USACM Technical Thrust Area on Uncertainty Quantification & Probabilistic Modeling from 2015-2020. Jim was named USACM Fellow in 2021.

Publications

  • Stewart, J. (2021). Data-Driven Modeling and the Big Data Problems [Conference Presenation]. https://doi.org/10.2172/1888961 Publication ID: 75864
  • Stewart, J. (2019). Sandia National Laboratories Five Most Impactful ASCR Research Investments [Presentation]. https://www.osti.gov/biblio/1645453 Publication ID: 69335
  • Stewart, J. (2019). Optimization Under Uncertainty for Design Materials and Large-Scale Computing [Presentation]. https://www.osti.gov/biblio/1644485 Publication ID: 67379
  • Stewart, J. (2019). Optimization Under Uncertainty for Predicting Properties and Performance [Conference Poster]. https://www.osti.gov/biblio/1592585 Publication ID: 64328
  • Stewart, J. (2018). Sandia’s Exascale Computing Project [Presentation]. https://www.osti.gov/biblio/1592313 Publication ID: 59100
  • Stewart, J. (2018). Computational Sciences and Math at Sandia — Algorithms Software and Applications [Conference Poster]. https://www.osti.gov/biblio/1806533 Publication ID: 63307
  • Stewart, J. (2018). Computational Mechanics R&D Opportunities at Sandia [Conference Poster]. https://www.osti.gov/biblio/1806532 Publication ID: 63306
  • Rizzi, F., Phipps, E., Hollman, D., Lifflander, J., Wilke, J., Markosyan, A., Kolla, H., Slattengren, N.L., Teranishi, K., Stewart, J., Clay, R., Bennett, J., & Bennett, J. (2017). Tackling UQ in DARMA a Programming Model for Task-Based Execution at Extreme-Scale [Conference Poster]. https://www.osti.gov/biblio/1507896 Publication ID: 57490
  • Stewart, J. (2017). USACM Thematic Workshop On Uncertainty Quantification And Data-Driven Modeling. https://doi.org/10.2172/1367419 Publication ID: 56240
  • Stewart, J. (2016). Science-Based Computational Modeling: New Questions New Challenges and Big Data Problems [Presentation]. https://www.osti.gov/biblio/1618233 Publication ID: 49138
  • Stewart, J. (2014). Introduction & Overview UQ Challenge Benchmarks [Conference]. https://www.osti.gov/biblio/1141773 Publication ID: 40215
  • Stewart, J. (2013). 2013 Dakota releases provide users an array of new features [Presentation]. https://www.osti.gov/biblio/1675176 Publication ID: 31775
  • Robinson, A., Petney, S., Drake, R., Weirs, V.G., Adams, B., Vigil, D., Carpenter, J., Garasi, C., Wong, M., Robbins, J., Siefert, C., Strack, O., Wills, A., Trucano, T., Bochev, P., Summers, R., Stewart, J., Ober, C., Rider, W., … Niederhaus, J. (2013). ALEGRA Update: Modernization and Resilience Progress [Conference]. https://www.osti.gov/biblio/1115141 Publication ID: 35790
  • Stewart, J. (2012). A V&V/UQ Framework for Science-Based Predictions [Conference]. https://www.osti.gov/biblio/1116373 Publication ID: 30235
  • Stewart, J. (2012). VUQ Focus Area [Conference]. https://www.osti.gov/biblio/1113291 Publication ID: 25748
  • Stewart, J. (2011). NEAMS VU Overview [Conference]. https://www.osti.gov/biblio/1118561 Publication ID: 25031
  • Stewart, J. (2011). Simulation Based Predictive Science [Conference]. https://www.osti.gov/biblio/1118545 Publication ID: 24779
  • Stewart, J. (2009). Verification Methods and NRC Regulations: A Brief Overview [Conference]. https://www.osti.gov/biblio/1142223 Publication ID: 16882
  • Stewart, J. (2009). NEAMS VU Verification Validation Uncertainty Quantification [Conference]. https://www.osti.gov/biblio/1141811 Publication ID: 16874
  • Stewart, J. (2009). NEAMS: Overview of Verification [Presentation]. https://www.osti.gov/biblio/1696871 Publication ID: 15987
  • Stewart, J. (2009). Verification Validation Uncertainty Quantification Predictive Modeling and Simulation: Integration of NW Capabilities into NEAMS [Presentation]. https://www.osti.gov/biblio/1698321 Publication ID: 15711
  • Stewart, J. (2008). UQ methods in DAKOTA employed by NuGET team to achieve critical QMU milestone [Presentation]. https://www.osti.gov/biblio/1710295 Publication ID: 13496
  • Stewart, J., Collis, S., & Collis, S. (2007). Copy of Collaboration Opportunities with Sandia National Laboratories’ Computer Science Research Institute (CSRI) [Conference]. https://www.osti.gov/biblio/1147373 Publication ID: 10640
  • Stewart, J. (2007). SNL Perspectives on Petascale Environments [Conference]. https://www.osti.gov/biblio/1143301 Publication ID: 8995
  • Stewart, J. (2007). Stewart Grad Education Sessions [Conference]. https://www.osti.gov/biblio/1143354 Publication ID: 8976
  • Eldred, M., Stewart, J., & Stewart, J. (2006). Solution Verification and Uncertainty Quantification Coupled [Presentation]. https://www.osti.gov/biblio/1724649 Publication ID: 8211
  • Stewart, J. (2004). Solution verification for explicit transient dynamics problems in the presence of hourglass and contact forces. Proposed for publication in Computer Methods in Applied Mechanics and Engineering Journal.. https://www.osti.gov/biblio/964541 Publication ID: 3785
  • Stewart, J., Stewart, J., & Stewart, J. (2003). SIERRA Framework Version 3: Master Element Subsystem. https://doi.org/10.2172/809987 Publication ID: 1792
  • Stewart, J., Stewart, J., & Stewart, J. (2003). SIERRA Framework Version 3: Transfer Services Design and Use. https://doi.org/10.2172/811716 Publication ID: 1719
  • Stewart, J., Stewart, J., Edwards, H., & Edwards, H. (2002). SIERRA Framework Version 3: h-Adaptivity Design and Use. https://doi.org/10.2172/808601 Publication ID: 1635
Showing 10 of 30 publications.