Larry Leemis, Professor 

Education

Mailing address
Department of Mathematics
William & Mary
P.O. Box 8795
Williamsburg, VA 23187-8795

e-mail address
MY_LAST_NAME[At]math[DoT]wm[DoT]edu

Office
Jones Hall, 116
757-221-2034

Research Interests

Websites

Links

R packages

Most recent syllabi

Books/Software

Selected Articles
  • "Random Variate Generation for Monte Carlo Experiments," IEEE Transactions on Reliability, Volume R-34, Number 1, April, 1985, 81-85.
  • "Lifetime Distribution Identities," IEEE Transactions on Reliability, Volume R-35, Number 2, June, 1986, 710-714.
  • "Variate Generation for Accelerated Life and Proportional Hazards Models," Operations Research, Volume 35, Number 6, November-December 1987, 892-894.
  • "Variate Generation for the Accelerated Life and Proportional Hazards Models with Time Dependent Covariates" (with L. Shih and K. Reynertson), Statistics and Probability Letters, Volume 10, Number 1, 1990, 335-339.
  • "Nonparametric Estimation of the Cumulative Intensity Function for a Nonhomogeneous Poisson Process," Management Science, Volume 37, Number 7, July 1991, 886-900.
  • "Variate Generation for Nonhomogeneous Poisson Processes with Time Dependent Covariates" (with L. Shih), Journal of Statistical Computation and Simulation, Volume 44, 1993, 165-186.
  • "On the Minimum of Independent Geometrically Distributed Random Variables" (with G. Ciardo, D. Nicol), Statistics & Probability Letters, Volume 23, 1995, 313-326.
  • "A Comparison of Approximate Interval Estimators for the Bernoulli Parameter" (with K. Trivedi), The American Statistician, Volume 50, Number 1, 1996, 288-295.
  • "Computational Algebra Applications in Reliability Theory" (with G. Hartless), IEEE Transactions on Reliability, Volume 45, Number 3, September 1996, 393-399.
  • "The Arctangent Survival Distribution" (with A. Glen), Journal of Quality Technology, Volume 29, Number 2, 1997, 205-210.
  • "A Generalized Univariate Change-of-Variable Transformation Technique" (with A. Glen, J. Drew), INFORMS Journal on Computing, Volume 9, Number 3, Summer 1997, 288-295.
  • "Seven Habits of Highly Successful Input Modelers," Proceedings of the 1997 Winter Simulation Conference, S. Andradottir, K. Healy, D. Withers, B. Nelson, Eds., 1997, 39-46.
  • "Simulation," Section 7.9, CRC Handbook of Discrete and Combinatorial Mathematics, K.H. Rosen, et al., Eds., CRC Press, Boca Raton, FL, 1999. 484-491.
  • "Nonparametric Estimation of the Cumulative Intensity Function for a Nonhomogeneous Poisson Process from Overlapping Realizations" (with B.L. Arkin), Management Science, Volume 46, Number 7, July 2000, 989-998.
  • "Computing the Cumulative Distribution Function of the Kolmogorov-Smirnov Statistic" (with J. Drew and A. Glen), Computational Statistics and Data Analysis, Volume 34, Number 1, July 2000, 1-15. Algorithm. First 30 CDFs.
  • "Survival Distributions Satisfying Benford's Law" (with B. Schmeiser and D. Evans), The American Statistician, Volume 54, Number 4, November 2000, 236-241 errata.
  • "Input Modeling Using a Computer Algebra System" (with D. Evans), Proceedings of the 2000 Winter Simulation Conference, J. Joines, R. Barton, P. Fishwick, K. Kang, Eds., 2000, 577-586.
  • "APPL: A Probability Programming Language" (with A. Glen, D. Evans), The American Statistician, Volume 55, Number 2, May 2001, 156-166. Original full manuscript.
  • "Input Modeling Techniques for Discrete-Event Simulations," Proceedings of the 2001 Winter Simulation Conference, B.A. Peters, J.S. Smith, D.J. Medeiros, M.W. Rohrer, Eds., 2001, 62-73.
  • "Computing the Nonparametric Estimator of the Survivor Function When All Observations are Either Left- or Right-Censored with Tied Observation Times," Computers and Operations Research, Volume 29, 2002, 423-431.
  • "Computing the Distribution of the Product of Two Continuous Random Variables" (with J. Drew and A. Glen), Computational Statistics and Data Analysis, Volume 44, Number 3, January 2004, 451-464.
  • "Nonparametric Estimation and Variate Generation for a Nonhomogeneous Poisson Process from Event Count Data," IIE Transactions, Volume 36, Number 12, December 2004, 1155-1160.
  • "Algorithms for Computing the Distributions of Sums of Discrete Random Variables" (with D. Evans), Mathematical and Computer Modelling, Volume 40, Number 13, 2004, 1429-1452.
  • "The Distribution of Order Statistics for Discrete Random Variables with Applications to Bootstrapping" (with D. Evans and J. Drew), INFORMS Journal on Computing, Volume 18, Number 1, Winter 2006, 19-30.
  • "Lower System Reliability Bounds from Binary Failure Data Using Bootstrapping," Journal of Quality Technology, Volume 38, Number 1, January, 2006, 2-13.
  • "Minimum Kolmogorov-Smirnov Test Statistic Parameter Estimates" (with M. Weber and R. Kincaid), Journal of Statistical Computation and Simulation, Volume 76, Number 3, 2006, 195-206. code.
  • "Algorithms to Calculate the Distribution of the Longest Path Length of a Stochastic Activity Network with Continuous Activity Durations" (with M. Duggan, J. Drew, J. Mallozzi, K. Connell), Networks, Volume 48, Issue 3, 2006, 143-165. Maple code for: Pritsker network, Wheatstone Bridge network, 8-path network; Algorithm, Maple code.
  • "Simulation 101 Software: Workshop and Beyond" (with B. Lawson), Proceedings of the 2007 Winter Simulation Conference, Henderson, S.G., Biller, B., Hsieh, M.--H., Shortle, J., Tew, J.D., Barton, R.R., Eds., 2007, 233-236.
  • "Univariate Distribution Relationships" (with J. McQueston), The American Statistician, Volume 62, Number 1, February 2008, 45-53.
  • "The Logistic-Exponential Survival Distribution" (with Y. Lan), Naval Research Logistics, Volume 55, Number 3, April 2008, 252-264. Errata.
  • "Parametric Model Discrimination for Heavily Censored Survival Data" (with D. Block), IEEE Transactions on Reliability, Volume 57, Number 2, June, 2008, 248-259.
  • "The Distribution of the Kolmogorov-Smirnov, Cramer-von Mises, and Anderson-Darling Test Statistics for Exponential Populations with Estimated Parameters" (with D. Evans, J. Drew), Communications in Statistics--Simulation and Computation, Volume 37, Number 7, August, 2008, 1396-1421.
  • "Managing Magnetic Resonance Imaging Machines: Support Tools for Scheduling and Planning (with A. Carpenter, A. Papir, D. Phillips, G. Phillips), Health Care Management Science, Volume 14, Issue 2, 2011, 158-173.
  • "Reliability Growth Via Testing" (Author Posting. (c) 'Copyright Holder', 2010. This is the author's version of the work. It is posted here by permission of 'Copyright Holder' for personal use, not for redistribution. The definitive version was published in IIE Transactions, Volume 42 Issue 4, April 2010. doi:10.1080/07408170903398000, http://dx.doi.org/10.1080/07408170903398000) IIE Transactions, Volume 42, Number 4, 2010, 317-324.
  • "Moment-Ratio Diagrams for Univariate Distributions," (with E. Vargo, R. Pasupathy), Journal of Quality Technology, Volume 42, Number 3, July, 2010, 276-286, Skewness vs. Kurtosis (color version), Coefficient of variation vs. Skewness (color version).
  • "Rectangles Algorithm for Generating Normal Variates" (with R. Zhang), Naval Research Logistics, Volume 59, Number 1, February, 2012, 52-57. n = 2, n = 4 (Matlab code), n = 8 (Matlab code), n = 16, n = 32, n = 64, n = 128, n = 256, n = 512, n = 1024, (Matlab code).
  • "Automating Bivariate Transformations," (with J. Yang, J. Drew), INFORMS Journal on Computing, Volume 24, Number 1, Winter 2012, (errata page 6, line 8, x > 0) 1-9.
  • "Transient Queueing Analysis," (with W. Kaczynski, J. Drew), INFORMS Journal on Computing, Volume 24, Number 1, Winter 2012, 10-28, errata.
  • "Nonparametric Random Variate Generation Using A Piecewise-Linear Cumulative Distribution Function" (with W. Kaczynski, N. Loehr, J. Taber), Communications in Statistics--Simulation and Computation , Volume 41, Number 4, 2012, 449-468. S-Plus code.
  • "Bivariate Nonparametric Random Variate Generation Using A Piecewise-Linear Cumulative Distribution Function" (with W. Kaczynski, N. Loehr, J. Taber), Communications in Statistics--Simulation and Computation , Volume 41, Number 4, 2012, 469-496.
  • "Univariate Probability Distributions" (with D.J. Luckett, A.G. Powell, P.E. Vermeer), Journal of Statistical Education, Volume 20, Number 3, 2012, 1-11, 1-11, 1-11.
  • "Simulating Multivariate Nonhomogeneous Poisson Processes Using Projections" (with E. Saltzman, J. Drew, S. Henderson), ACM Transactions on Modeling and Computer Simulation (TOMACS), Volume 22, Issue 3, Article 15, 2012, 1-13.
  • "Symbolic ARMA Model Analysis" (with K. Webb), Computational Economics, Volume 43, Number 33, March, 2014, 313-330.
  • "Applying Bootstrap Methods to System Reliability" (with C. Marks, A. Glen, M. Robinson), The American Statistician, Volume 68, Number 3, August 2014, 174-182.
  • "A Continuous Piecewise-Linear NHPP Intensity Function Estimator" (with D. Nicol), Proceedings of the 2014 Winter Simulation Conference, 498-509. code.
  • "Discrete-Event Simulation Using R" (with B. Lawson), Proceedings of the 2015 Winter Simulation Conference, 3502-3513.
  • "An R Package for Simulation Education" (with B. Lawson), Proceedings of the 2017 Winter Simulation Conference, 4175-4186.
  • "Mixed-Type Distribution Plots" (with C. Weld), Information Visualization, Volume 18, Number 3, 2019, 1-7, 311-317.
  • "Ensemble Confidence Intervals for Binomial Proportions" (with H. Park), Statistics in Medicine, Volume 38, Number 18, 2019, 3460-3475.
  • "The Ties That Bind" (with R. Pasupathy), Significance, Volume 16, Number 4, August 2019, 8-9.
  • "Plotting Two-Dimensional Confidence Regions" (with C. Weld, A. Loh), The American Statistician, Volume 74, Number 2, May 2020, 156-168.
  • "Animation for Simulation Education in R" (with V. Kudlay, B. Lawson), Proceedings of the 2020 Winter Simulation Conference, 3260-3271.
  • "Structuring a Simulation Course Around the simEd Package for R" (with B. Lawson), Proceedings of the 2021 Winter Simulation Conference, 1-12 (no page numbers assigned yet).
  • "RMSE-Minimizing Confidence Interval for the Binomial Parameter" (with K. Feng, H. Sasinowska), Computational Statistics, Volume xx, Number y, 2022. forthcoming.
  • "The Probability Mass Function of the Kaplan-Meier Product-Limit Estimator" (with Y. Qin, H. Sasinowska), The American Statistician, Volume xx, Number y, 2022. forthcoming. Maple code. R code (n < 8). R code (n = 1, 2, ... , 35).

Other Academic Employment The University of Oklahoma School of Industrial Engineering, Purdue University School of Industrial Engineering, Baylor University Mathematics Department, Purdue University Mathematics Department.

Consulting/Research Experience Woodmizer, Inc., Yorktown Naval Weapons Station, Price-Trac, Institute for Computing Applications in Science and Engineering (ICASE), United States Army, Komag, Inc., Federal Aviation Administration, Tinker Air Force Base, McDonnell-Douglas Corporation, Kelly Air Force Base, Magnetic Peripherals, Inc., AT&T Corporate Education Center, AT&T Technologies, Inc., NASA/Langley Research Center, Delco Electronics, Nisus Corporation, Leemis Marketing, Inc., Argonne National Laboratory, Dunn & Hargitt, OakBrook Data Center.

Misc Pages
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Graduate studies in Operations Research at William & Mary
Famous Larrys in history
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last updated July 13, 2022

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