Tamara (Tammy) Kolda is a Principal Member of Technical Staff in the Mathematics, Informatics, and Decision Sciences department at Sandia National Laboratories in Livermore, California. Her research interests include multilinear algebra and tensor decompositions, data mining, optimization, nonlinear solvers, graph algorithms, parallel computing and the design of scientific software. Tamara received a 2003 Presidential Early Career Award for Scientists and Engineers (PECASE) in recognition of her innovative research in algorithms and software for scientific computing, optimization, parallel computing and nonlinear solvers.  More...  Or see full CV...

What's New (what's old)...

• There are openings in my department for Informatics/Complex Systems Researchers at both the junior and senior levels. If you want to ensure that your application gets attention, please drop me a note to let me know you've applied.
• Slides from GAMM Talk (Jan 25, 2008)
• Click here for slides from my recent talks at IPAM (Oct 26, 2007) and ICDM (Oct 31, 2007)
• Updated version of How To Give a Talk (July 2007)
• Tutorial on Mining Large Time-evolving Data Using Matrix and Tensor Tools at SDM07, SIGMOD07, ICML07, KDD07.
• Version 2.2 of the MATLAB Tensor Toolbox has been released (January 2007)
• APPSPACK 5.0 - now supports linear constraints (July 2006)

Selected Recent Papers: [Click here for complete publication list with abstracts]

Tensors

• Tensor decompositions and applications (with B. W. Bader). SIREV, to appear.
• Efficient MATLAB computations with sparse and factored tensors (with B. W. Bader). SISC, 30(1):205-231, Dec. 2007.
• Algorithm 862: MATLAB Tensor Classes for Fast Algorithm Prototyping (with B. W. Bader). ACM TOMS, 32(4):635-653, Dec. 2006.
• Multilinear operators for higher-order decompositions. SAND2006-2081, Apr. 2006.

Tensors/Matrices and Data Mining

• Resolving the sign ambiguity in the singular value decomposition (with R. Bro and E. Acar), J. Chemometrics, 22(2):135-140, Feb. 2008.
• Temporal analysis of semantic graphs using ASALSAN (with B. W. Bader and R. A. Harshman). In ICDM 2007, Nov. 2007.
• Cross-language information retrieval using PARAFAC2 (with P. A. Chew, B. W. Bader, and A. Abdelali). In KDD '07, pages 143-152, Aug. 2007.
• Extracting clusters from large datasets with multiple similarity measures using IMSCAND (with T. M. Selee and W. P. Kegelmeyer and J. D. Griffin). In CSRI Summer Proceedings 2007.
• Multilinear algebra for analyzing data with multiple linkages (with D. Dunlavy and W. P. Kegelmeyer). SAND2006-2079, Apr. 2006.
• The TOPHITS model for higher-order web link analysis (with B. Bader). In Proc. Workshop on Link Analysis, Counterterrorism and Security at SDM06, Apr. 2006.
• Higher-order web link analysis using multilinear algebra (with B. W. Bader and J. P. Kenney). In ICDM 2005, pages 242-249, Nov. 2005.

Optimization

• Asynchronous parallel generating set search for linearly-constrained optimization (with J. D. Griffin and R. M. Lewis). SISC, 30(4):1892-1924, May 2008.
• A comparison of derivative-free optimization methods for groundwater supply and hydraulic capture community problems (with K. R. Fowler et al.). Advances in Water Resources, 31(5):743-757, May 2008.
• Nonlinearly-constrained optimization using asynchronous parallel generating set search (with J. Griffin). SAND2007-3257, May 2007.
• Stationarity Results for Generating Set Search for Linearly Constrained Optimization (with R. M. Lewis and V. Torczon). SIOPT 17(4):943-968, Nov. 2006.
• Algorithm 856: APPSPACK 4.0: Asynchronous Parallel Pattern Search for Derivative-Free Optimization (with G. A. Gray). ACM TOMS, 32(3):485-507, Sept. 2006.
• A generating set direct search augmented Lagrangian algorithm for optimization with a combination of general and linear constraints (with R. M. Lewis and V. Torczon). SAND2006-5315, Aug. 2006.
• Revisiting asynchronous parallel pattern search for nonlinear optimization. SIOPT, 16(2):563-586, Dec. 2005.

Software:

• Tensor Toolbox for MATLAB - Higher-order operations of multidimensional arrays
• NOX - A C++ Nonlinear Solver Package
• Trilinos - A suite of high-performance numerical codes (including NOX)
• APPSPACK - A C++ derivative-free optimization package
• SDDPACK - C and MATLAB code for the semi-discrete matrix decomposition

Conferences:  

• 2008 SIAM Annual Meeting (AN08), Town & Country Resort Hotel, San Diego, California, July 7-11, 2008 (Meeting Co-chair and Minisymposium Speaker)
• KDD 2008 Workshop on Data Mining using Matrices and Tensors, Las Vegas, Nevada, August 24, 2008 (Program Committee)
• Multi-Manifold Data Modeling and Applications, Institute for Mathematics and Its Applications (IMA), Minneapolis, Minnesota, October 27-30, 2008 (Co-Organizer)

Current Professional Service:

• Editorial Board, SIAM J. Scientific Computing
• Vice Chair, SIAM Activity Group on Computational Science & Engineering
• Member, SIAM Nomination Committee
• Member, American Institute of Mathematics (AIM) Human Resources Board
• Member, SIAM Systems Oversight Committee
• Editor, NA-Digest (click here for more information on NA-Net, including how to join and how to submit a post)

Miscellany:

• If you live in the Bay Area, you should subscribe to the BANANA (Bay Area Numerical Analysis Networking Alliance) Email List
• Slides from recent talks: The What, Why, Who, Where, & How of a Successful Career
• Do as I say, not as I do... How to Give a Talk: Advice on Preparing and Presenting Technical Talks in the Mathematical Sciences (updated in 2007)

Maintained by: Tamara Kolda (tgkolda@sandia.gov).
Disclaimer and Acknowledgment.