Stefan Wild Mathematics and Computer Science Division Argonne National Laboratory 9700 S. Cass Avenue Bldg. 240, 1154 Argonne, IL 60439 (630) 252-9948 - phone (630) 252-5986 - fax wild (at) mcs.anl.gov - email

I am an Assistant Computational Mathematician in the Laboratory for Advanced Numerical Simulations (LANS) and a Fellow in the Computation Institute at the University of Chicago. I work in the area of optimization and focus on problems involving complex simulations.

Previously:
→	Director's Postdoctoral Fellow at Argonne, September 2008-2010
→	DOE Computational Science Graduate Fellow (CSGF)
→	Ph.D & MS, Operations Research, Cornell University, January 2009
→	MS & BS, Applied Mathematics, Univ. of Colorado, May 2003
Preprints:
×	"Non-intrusive Termination of Noisy Optimization." With Jeffrey Larson. To appear in Optimization Methods and Software, 2012. [More information]
×	"Estimating Derivatives of Noisy Simulations." With Jorge Moré. To appear in ACM Transactions on Mathematical Software, 2012. [More information]
¤	"Obtaining Quadratic Models of Noisy Functions." With Aswin Kannan. In preparation, November 2011. [More information]
¤	"An Experimental Study of Global and Local Search Algorithms in Empirical Performance Tuning" With Prasanna Balaprakash and Paul Hovland. Submitted, January 2012. [More information]
¤	"SPAPT: Search Problems in Automatic Performance Tuning." With Prasanna Balaprakash and Boyana Norris. Submitted, October 2011. [More information]
¤	"Variable Selection and Sensitivity Analysis via Dynamic Trees with an Application to Computer Code Performance Tuning." With Robert B. Gramacy and Matthew A. Taddy. Submitted, August 2011. [More information]
¤	"GORBIT: Global Optimization by Multistart Radial Basis Function Algorithms." With Christine Shoemaker. Submitted, July 2009. [More information]
Selected Recent Publications:
×	"Nuclear Energy Density Optimization: Large Deformations." With M. Kortelainen, J. McDonnell, W. Nazarewicz, P.-G. Reinhard, J. Sarich, N. Schunck, and M. Stoitsov. Physical Review C, Vol. 85 (2), pp. 024304, 2012. [More information]
×	"Occupation Number-based Energy Functional for Nuclear Masses." With Michael Bertolli and Thomas Papenbrock. Physical Review C, Vol. 85 (1), pp. 014322, 2012. [More information]
×	"Global Convergence of Radial Basis Function Trust Region Derivative-Free Algorithms." With Christine Shoemaker. Appears inSIAM Journal on Optimization, Vol. 21 (3), pp.761-781, 2011. [More information]
×	"Estimating Computational Noise." With Jorge Moré. Appears in SIAM Journal on Scientific Computing, Vol. 33 (3), pp. 1292-1314, 2011. [More information]
×	"Can Search Algorithms Save Large-scale Automatic Performance Tuning?" With Prasanna Balaprakash and Paul Hovland. Appears in Proceedings of the International Conference on Computational Science, ICCS 2011, Procedia Computer Science, Vol. 4, pp. 2136-2145, 2011. [More information]
×	"Nuclear Energy Density Optimization." With M. Kortelainen, T. Lesinski, J. Moré, W. Nazarewicz, J. Sarich, N. Schunck, and M. Stoitsov. Appears in Physical Review C, Vol. 82, pp.024313, 2010. [More information]
×	"Benchmarking Derivative-Free Optimization Algorithms." With Jorge Moré. Appears in SIAM Journal on Optimization, Vol. 20 (1), pp.172-191, 2009. [More information]
×	"MNH: A Derivative-Free Optimization Algorithm Using Minimal Norm Hessians." Appears in Tenth Copper Mountain Conference on Iterative Methods, April 2008. [More information]
×	"ORBIT: Optimization by Radial Basis Function Interpolation in Trust-Regions." With Rommel Regis and Christine Shoemaker. Appears in SIAM Scientific Computing, Vol. 30 (6), pp. 3197-3219, 2008. [More information]
More papers
Research Coverage:
¤	2011: Pounding Out Atomic Nuclei, Cranking up the Speed of DFT, The Unedf Project
¤	2010: Mysteries of the Nuclear Landscape
¤	2007: Green Silicon
Recent/Upcoming Talks and Posters:
×	[11/15/2011] "Quadratic Models of Quantifiably Noisy Functions." INFORMS Annual Meeting, Charlotte, NC.
×	[10/25/2011] "Opening the Blackbox in Simulation-Based Optimization." University of Colorado-Denver, Operations Research Seminar, Denver, CO.
¤	[10/18/2011] "Optimal Derivatives of Noisy Simulations." DOE Applied Mathematics Principal Investigators Meeting, Reston, VA.
×	[06/21/2011] "New Developments With POUNDERS." Annual UNEDF Meeting, E. Lansing, MI.
×	[05/18/2011] "Optimization With Some Derivatives." SIAM Conference on Optimization, Darmstadt, Germany.
×	[03/16/2011]"The Hunt for Missing Derivatives: Reward Offered!" 5th LACM-EFES-JUSTIPEN Workshop, Oak Ridge, TN.
×	[03/01/2011]"Applied Optimization Without Derivatives." SIAM Conference on Computational Science & Engineering, Reno, NV.
×	[11/07/2010] "Estimating Derivatives of Computationally Noisy Functions." INFORMS Annual Meeting, Austin, TX.
×	[09/07/2010] "Least Squares Parameter Fitting Without Derivatives." 2nd International Conference on Engineering Optimization, Lisbon, Portugal.
More talks
Some Projects:
Derivative-free Optimization Computational Noise Universal Nuclear Energy Density Functional Benchmarking Algorithms → New algorithms and applications → Analysis and codes → Parameter Estimation and Sensitivity Analysis for UNEDF → Benchmarking Derivative-Free Optimization Algorithms
	¤ PhD students: Well-prepared students are always welcome as Givens Associates
	¤ Postdocs: ANL named 4th Best Place in the US to do a Postdoc

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