Areas of Interest

Research Interests

• Reliability and accelerated life testing 

• Statistics education

Publications and Presentations

Publications

• Jayawardhana, A. A. (2009), “Weibull Prediction Bounds in Accelerated Life Testing with Two Stress Factors of Acceleration, American Statistical Association 2008 Proceedings of the Section on Physical and Engineering Sciences, pp 2888-2894
• Brooker, N., Lord, J. R., Long, J, & Jayawardhana, A. A. (2008), “AFLP Analysis of Genetic Diversity in Charcoal Rot Fungal Populations Impacted by Crop Rotations,” Comm. Appl. Biol. Sci., Ghent University, 2008…
• Jayawardhana, A. A. (2008), “Writing Assignments in Elementary Statistics Classes,” American Statistical Association 2007 Proceedings of the Section on Statistical Education, pp 2260-2263.
• Jayawardhana, A. A. and Woodburn, C. (2006), "Writing to Learn in Elementary Statistics," American Statistical Association 2005 Proceedings of the Section on Statistical Education, pp 2253-2257.
• Pintar, A. and Jayawardhana, A. A. (2006),"A Simulation Study to Test the Accuracy of Using Maximum Likelihood Predictive Density in Quality Control Assuming the Power Rule Model and the Exponential Distribution," American Statistical Association 2005, Proceedings of the Section on Quality and Productivity, pp 1848-1853.
• Chambers, D. K., Arruda, J. A., and Jayawardhana, A. A. (2005), "A synoptic water quality survey of the Spring River and its tributaries," Transactions of the Kansas Academy of Science, Vol. 108, No. 1/2, pp 47-56.
• Jayawardhana, A. A. and Samaranayake, V. A. (2004), "Obtaining Prediction Bounds for a Weibull Life Distribution using Multi-Level Accelerated Life Tests: Corrigenda and Addenda," Journal of Statistical Computation and Simulations, Vol.74 No. 12, December 2004, pp 915-920
• Jayawardhana, A.A. and Samaranayake, V. A. (2004), "Prediction Intervals for the Weibull Distribution, Inter Stat, November 2004.
• Jayawardhana, A. A. and Samaranayake, V. A. (2004), "Exponential Prediction Bounds in Accelerated Life Testing with Multiple Stress Factors," American Statistical Association 2003, Proceedings of the JSM conference, Section on Quality and Productivity, pp 2004-2011.
• Jayawardhana, A.A. and Samaranayake, V.A. (2003), "Prediction Bounds in Accelerated Life Testing: Weibull Models with the Inverse Power Relationship," Journal of Quality Technology, Vol 35, No. 1, January 2003, pp 89-103.
• Jayawardhana, A. A. and Samaranayake, V. A. (2002), "Obtaining Prediction Bounds for a Weibull Life Distributions Using Multi-Level Accelerated Life Tests," American Statistical Association 2002, Proceedings of the JSM conference, Section on Physical and Engineering Sciences, pp 1632-1638.
• Jayawardhana, A. A. and Samaranayake, V. A. (1998), "Predictive Density Estimation in Accelerated Life Testing," American Statistical Association 1998 Proceedings of the Section on Quality and Productivity, 1998, pp 26-31.
• Jayawardhana, A. A. (1998), "Predictive Density Estimation in Life Testing," Ph.D. Dissertation, University of Missouri-Rolla, Rolla, MO
• Richard R. Bryant, Ananda Jayawardhana, V. A. Samaranayake, and Allen Wilhite "The Impact of Alcohol and Drug Use on Employment: A Labor Market Study Using the National Longitudinal Survey of Youth," University of Wisconsin-Madison, Institute for Research on Poverty Discussion Paper- 1996 DP 1092-96

Presentations

• 08/2010—A.A. Jayawardhana “Writing to Learn in Upper Level Statistics Courses,”JSM, Vancouver, BC
• 08/2009—A.A. Jayawardhana and V.A. Samaranayake “Lower Tolerance Bounds in Accelerated Life Testing: Weibull Model with Inverse Power Relationship,” JSM, Washington, DC
• 08/2008-- A.A. Jayawardhana "Weibull Prediction Bounds in Accelerated Life Testing with Two Stress Factors," JSM, Denver, Colorado
• 08/2007-- A.A. Jayawardhana, "Writing Assignments in Elementary Statistics," JSM, Salt Lake City, Utah
• 08/2005-- A.A. Jayawardhana and C. Woodburn, "Writing to Learn in Elementary Statistics," JSM, Minneapolis, MN
• 08/2005-- Adam Pintar and A.A. Jayawardhana, "A Simulation Study to Test the Accuracy of Using Maximum Likelihood Predictive Density in Quality Control Assuming the Power Rule Model and the Exponential Distribution," JSM, Minneapolis, MN.
• 08/2003-- A.A. Jayawardhana and V.A. Samaranayake, "Exponential Prediction Bounds in Accelerated Life Testing with Multiple Stress Factors," JSM, San Francisco, CA
• 08/2002-- A.A. Jayawardhana and V.A. Samaranayake, "Obtaining Prediction Bounds for a Weibull Life Distribution using Multi-level Accelerated Life Tests," JSM, New York, NY
• 06/1999-- A.A. Jayawardhana and V.A. Samaranayake, "Predictive Density Estimation in Accelerated Life Testing for Lognormal Life Distributions," THE 6TH ASA/IMS SPRING RESEARCH CONFERENCE ON STATISTICS IN INDUSTRY AND TECHNOLOGY 1999, Minneapolis, MN
• 08/1998-- A.A. Jayawardhana and V.A. Samaranayake, "Predictive Density Estimation in Accelerated Life Testing," ASA Q&P Section, JSM, Dallas, TX
• 08/1996-- A.A. Jayawardhana and V.A. Samaranayake, "Prediction Interval for the Weibull Random Variables," JSM, Chicago, IL