Stephyn G. W. Butcher
Graduate Student, Ph. D. Program
Department of Computer Science
The Johns Hopkins University
Baltimore, MD

Lecturer, Department of Computer Science, Whiting School of Engineering, The Johns Hopkins University, Baltimore, MD

Lecturer, Engineering for Professionals, Whiting School of Engineering, The Johns Hopkins University, Baltimore, MD

Software Engineer, Mercury Analytics, Washington, DC

Advisor: John W. Sheppard

MS in Computer Science, 2005, The Johns Hopkins University, Baltimore, MD (JHU)
MA in Economics, 1990, The American University, Washington, DC (AU)
BA in Economics, 1987, The California State University, Sacramento, California (CSUS)

My research interests focus mainly on topics in machine learning although as a work-a-day software engineer, I'm also keenly interested in programming language and software engineering issues.

The practical applications of my research have fallen mainly under the purview of data-driven models for diagnosis and prognosis.

I used to be an economist. I got better.

"If the problem is in P, I'm not interested."

Have a job in Ireland? hire me!

Ann O. Kay and Stephyn G. W. Butcher, "Employment and Earnings of Performing Artists, 1970-1990" appeared in Artists in the Work Force: Employment and Earnings 1970-1990, Research Report #37 (3.2Mb), Neil O. Alper, Gregory H. Wassall, Joan Jeffri, Roger Greenblatt, Ann O. Kay, Stephyn G.W. Butcher and Harry Hillman Chartrand, authors. National Endowment for the Arts, Seven Locks Press, Santa Ana, California, 1996.

Stephyn G. W. Butcher and John W. Sheppard, "Distributional Smoothing in Bayesian Fault Diagnosis", to appear in IEEE Transactions on Instrumentation and Measurement, forthcoming.

John W. Sheppard and Stephyn G. W. Butcher, "A Formal Analysis of Fault Diagnosis with D-Matrices", Journal of Electronic Testing: Theory and Applications, 2007.

Stephyn G. W. Butcher and John W. Sheppard, "Asset-Specific Bayesian Diagnostics in Mixed Contexts". IEEE AUTOTESTCON 2007 Conference Record, Baltimore, MD, September 2007.

Stephyn G. W. Butcher and John W. Sheppard, "Improving Diagnostic Accuracy by Blending Probabilities: Some Initial Experiments", Proceedings of the 18th International Workshop on Principles of Diagnosis (DX-07), Nashville, TN, May 2007

Stephyn G. W. Butcher, John W. Sheppard, Mark A. Kaufman, Hanh Ha, and Craig MacDougall, "Experiments in Bayesian Diagnostics with IUID-Enabled Data,", IEEE AUTOTESTCON 2006 Conference Record, Anaheim, California, September 2006, pp. 605-614

John W. Sheppard and Stephyn G. W. Butcher, "On the Linear Separability of Diagnostic Models,", IEEE AUTOTESTCON 2006 Conference Record, Anaheim, California, September 2006, pp. 626-635.

John W. Sheppard, Stephyn G. W. Butcher, Mark A. Kaufman, and Craig MacDougall, "Not-So-Naive Bayesian Networks and Unique Identification in Developing Advanced Diagnostics," Proceedings of the IEEE Aerospace Conference, Big Sky, Montana, March 2006.