### Allison Baker

**Program Years:**1999-2003**Academic Institution:**University of Colorado**Field of Study:**Applied Mathematics**Academic Advisor:**Elizabeth Jessup**Practicum(s):**

Sandia National Laboratories, New Mexico (2001)**Degree(s):**

Ph.D. Applied Mathematics, University of Colorado, 2003

M.S. Applied Mathematics, University of Colorado, 1999

B.S. Mechanical Engineering, Rice University, 1994

#### Current Status

**Status:**Project Scientist II, National Center for Atmospheric Research (NCAR)**Research Area:**Iterative Methods, Parallel Computing, Software for Scientific Computing, Data Compression**Personal URL:**https://staff.ucar.edu/users/abaker**Contact Information:**abaker @ ucar.edu

#### Publications

A.H. Baker, D.M. Hammerling, M.N. Levy, H. Xu, J.M. Dennis, B.E. Eaton, J. Edwards, C. Hannay, S.A. Mickelson, R.B. Neale, D. Nychka, J. Shollenberger, J. Tribbia, M. Vertenstein, and D. Williamson, "A new ensemble-based consistency test for the community earth system model.â€ Geoscientific Model Development, 8, pp. 2829â€“2840, doi:10.5194/gmd-8-2829-2015, 2015.Yong Hu, Xiaomeng Huang, Allison H. Baker, Yu-heng Tseng, Frank O. Bryan, John M. Dennis, and Guangwen Yang, "Improving the Scalability of the Ocean Barotropic Solver in the Community Earth System Modelâ€, Proceedings of the International Conference for High Performance Computing, Networking, and Storage, SC â€™15, Austin, TX, pp.42:1-42:12, 2015.

J. Small, J. Bacmeister, D. Bailey, A. Baker, S. Bishop, F. Bryan, J. Caron, J. Dennis, P. Gent, H. Hsu, M. Jochum , D. Lawrence, E, MuÃ±oz, P. DiNezio T. Scheitlin R. Tomas, J. Tribbia , Y. Tseng, M. Vertenstein, "A new synoptic scale resolving global climate simulation using the Community Earth System Model.â€ Journal of Advances in Modeling Earth Systems, 6, pp. 1065-1094, December 2014, DOI:10.1002/2014MS000363.

A.H. Baker, H. Xu, J.M. Dennis, M.N. Levy, D. Nychka, S.A. Mickelson, J. Edwards, M. Vertenstein, A. Wegener, "A Methodology for Evaluating the Impact of Data Compression on Climate Simulation Data.â€ Proc. Of the 23rd International ACM Symposium on High Performance Parallel and Distributed Computing (HPDC14), Vancouver, CA, 2014, pp. 203-214.

A.H. Baker, R.D. Falgout, Tz.V. Kolev, and U.M. Yang, "Scaling hypre's Multigrid Solvers to 100,000 Cores.â€ High Performance Scientific Computing: Algorithms and Applications - A Tribute to Prof. Ahmed Sameh, M. Berry et al., eds., Springer (2012), pp. 261-279. doi: 10.1007/978-1-4471-2437-5_13

A. H. Baker, R. D. Falgout, H. Gahvari, T. Gamblin, W. Gropp, K. E. Jordan, T. V. Kolev, M. Schulz, and U. M. Yang, "Preparing Algebraic Multigrid for Exascale,â€ Lawrence Livermore National Laboratory, Tech. Rep. LLNL-TR-533076, February 2012.

Andy Yoo, Allison H. Baker, Roger Pearce, and Van Emden Henson, "A Scalable Eigensolver for Large Scale-Free Graphs Using 2D Graph Partitioning,â€ Proc. Of Supercomputing 2011 (SC11), Seattle, WA.

A.H. Baker, R.D. Falgout, Tz.V. Kolev, and U.M. Yang, "Multigrid Smoothers for Ultra-Parallel Computing,â€ SIAM J. Sci. Comput., 33 (2011), pp. 2864-2887.

A.H. Baker, R.D. Falgout, T. Gamblin, Tz.V. Kolev, M. Schulz, and U.M. Yang, "Scaling Algebraic Multigrid Solvers: On the Road to Exascale,â€ Proc. Of Competence in High Performance Computing, CiHPC 2010, Schwetzingen Germany.

A.H. Baker, T. Gamblin, M. Schulz, and U.M. Yang, "Challenges of Scaling Algebraic Multigrid Across Modern Multicore Architectures,â€ in Proc. Of the 25th IEEE International Parallel and Distributed Processing Symposium (IPDPS 2011), Anchorage, AK, 2011.

H. Gahvari, A.H. Baker, M. Schulz, U.M. Yang, K. Jordan, and W. Gropp, "Modeling the Performance of an Algebraic Multigrid Cycle on HPC Platforms,â€ in Proc. Of the 25th International Conference on Supercomputing (ICS 2011), Tucson, AZ, 2011.

A.H. Baker, M. Schulz, and U.M. Yang, "On the Performance of an Algebraic Multigrid Solver on Multicore Clusters." Proceedings of VECPAR 2010, Ninth International Conference on High Performance Computing for Computational Science, Berkeley ,CA , June 2010, http://vecpar.fe.up.pt/2010/papers/24.php.

D.A Brain, A.H. Baker, J.P. Briggs, J.P. Eastwood, J.S. Halekas, and T. D. Phan, "Episodic Detachment of Martian Crustal Magnetic Fields Leading to Bulk Atmospheric Plasma Escape," Geophysical Research Letters, 37, July 2010, doi:10.1029/2010GL043916.

A.H. Baker, Tz. V. Kolev, and U.M. Yang, "Improving Algebraic Multigrid Interpolation Operators for Linear Elasticity Problems," Numerical Linear Algebra with Applications 17 (2010), pp. 495-517.

A.H. Baker, E.R. Jessup, and Tz. V. Kolev, "A Simple Strategy for Varying the Restart Parameter in GMRES(m)," Journal of Computational and Applied Mathematics, 230 (2009), pp. 751-761.

A.H. Baker, R.D. Falgout, and U.M. Yang, "An Assumed Partition Algorithm for Determining Processor Inter-Communication", Parallel Computing, 32 (2006), pp. 394-414.

A.H. Baker, J.M. Dennis, and E.R. Jessup, "On improving linear solver performance: a block variant of GMRES," SIAM Journal on Scientific Computing, 27 (2006), pp. 1608-1626.

A.H. Baker, E.R. Jessup, and T. Manteuffel, "A technique for accelerating the convergence of restarted GMRES," SIAM Journal on Matrix Analysis and Applications, 26 (2005) pp. 962-984.

A. Baker, J. Dennis, and E.R. Jessup. Toward memory-efficient linear solvers. In VECPAR'2002, Fifth International Conference on High Performance Computing for Computational Science: Selected Papers and Invited Talks, J.M.L.M. Palma and J. Dongarra and V. Hernandez and A. A. Sousa, eds., Lecture Notes in Computer Science, Springer, Berlin, 2003, pp. 315-327.,

A.H. Baker, S. Crivelli, and E.R. Jessup. An Efficient Parallel Termination Detection Algorithm. International Journal of Parallel, Emergent and Distributed Systems, 21 (2006), pp. 293-301.

#### Awards

2014 Special Recognition Award, NCAR Computational Information Systems Laboratory2014 Best Presentation Award, HPDC â€™14, Vancouver, CA

2013 Special Recognition Award, Climate & Global Dynamics Division, NCAR Earth System Laboratory

2011, 2005 Certificate of Appreciation, Center for Applied Scientific Computing (LLNL)

2007 R&D 100 Award: hypre: Fast Solution Algorithms for High-Performance Scientific Computing (with R. Falgout, V.E. Henson, Tz. Kolev, B. Lee, J. Painter, C. Tong, P. Vassilevski, and U.M. Yang)

1999-2003 Department of Energy Computational Science Graduate Fellowship

1997-1999 Chancellorâ€™s Fellowship (University of Colorado)