Faculty Profiles

Research Interests and Recent Publications




Asit P. Basu , Ph.D., University of Minnesota, 1966

Profile:
His major research interest is in the development of statistical theory for use on reliability theory, statistical process control and biomedical problems. He is a fellow of the American Statistical Association, Institute of Mathematical Statistics, and an elected member of the International Statistical Institute. He is on the Editorial Board of Lifetime Data Analysis.

Selected Recent Publications:

  • Books:

    • Statistical Methods for the Reliability of Repairable Systems (with Steve Rigdon). John Wiley and Sons , 2000.

    • Frontiers in Reliability (with S. Basu). World Scientific , 1998.

    • The Exponential Distribution: Theory, Methods and Applications (with N. Balakrishnan) Gordon & Breach, 1995.

    • Advances in Reliability, North-Holland , 1993.

    • Special Reliability issue of Journal of Statistical Planning and Inference, 1987 and 1991.

    • Reliability and Quality Control, North­Holland , 1986.

  • Selected Papers:

    • Bayesian analysis of incomplete time and cause of failure data (with C. Mukhopadhyay). Journal of Statistical Planning and Inference, 59, 79-100, 1997.

    • Bayesian analysis for a stress-strength system under noninformative priors (with M. Ghosh and D. Sun). Canadian Journal of Statistics, 23, 323-332, 1997.

    • Bayesian Analysis for Masked System Failure Data Using Non-identical Weibull Models (with S. Basu and C. Mukhopadhyay). Journal of Statistical Planning and Inference, 78, 2255-2275, 1999.

    • The Weibull Non-Homogeneous Poisson Process (with S. Rigdon). In Handbook of Statistics, 20, 43 - 68, 2001.




Joseph E. Cavanaugh , Ph.D., University of California, Davis, 1993

Profile:
His current research interests are model selection and time series analysis; specifically, model selection criteria and state-space modeling of time series. He is also interested in linear models and computational statistics.

Selected Recent Publications:

  • A bootstrap corrected variant of AIC for state-space model selection (with R.H. Shumway). Statistica Sinica 7, 473-496, 1997.

  • An Akaike information criterion for model selection in the presence of incomplete data (with R. H. Shumway). Journal of Statistical Planning and Inference, 67, 45-65, 1998.

  • Assessing the predictive influence of cases in a state-space process (with W. O. Johnson). Biometrika, 86, 183-190, 1999.

  • A regression model selection criterion based on bootstrap bumping for use with resistant fitting (with A. A. Neath). Computational Statistics and Data Analysis, 35, 155-169, 2000.




Nancy Flournoy , Ph.D., University of Washington, 1982

Profile:
Dr. Flournoy's current research interests include adaptive sequential designs, chemometrics, clinical trials and statistical immunology.

Selected Recent Publications:

  • Dose finding using isotonic regression estimates in an up-and-down biased coin design (with M. Stylianou). Biometrics, 58, 171-177, 2002.

  • Response-driven urn designs. Sequential Analysis, 21, 33-42, 2002.

  • Estimating the probability of toxicity at the target dose following an up-and-down design (with M. Stylianou and M. Proschan). Statistics in Medicine, to appear, 2002.




Chong (Zhuogiong) He , Ph.D., Purdue University, 1993

Profile:
Chong worked on her Ph.D. at Purdue University under the guidance of Professor William Studden. She spent six years as a Biometrician with the Missouri Department of Conservation. Her research interests include Bayesian Analysis, Survival Analysis, Spatial Statistics, Statistical Computation, and Wildlife Research.

Selected Recent Publications:

  • Effects of Implanted Radiotransmitters on Captive Mouring Doves (with J. Schulz et al). Journal of Wildlife management, 62, 1451-1460, 1998.

  • Hierarchical Bayes estimation of hunting success rates with spatial correlations (with D. Sun). Biometrics, 46, 192-199, 2000.

  • Propriety of posteriors with improper priors in hierarchical linea mixed models (with R.K. Tsutakawa and D. Sun). Statistica Sinica, 11, 77-95, 2001.

  • Bayesian analysis for bird nest survival models (with D. Sun and Y. Tra). Biometrics, 57, 1059-1066, 2001.




John E. Hewett , Ph.D., State University of Iowa, 1965

Profile:
Professor of Statistics and Associate Director of the Medical Informatics Group in the School of Medicine, Director of undergraduate studies. His areas of specialization include multivariate analysis, distribution theory and biostatistics. His current research interests include determining which outcome of a set of possible related outcomes is the best to use in a study. This includes investigating the implications for sample size and the impact potential covariates could have.

Selected Publications:

  • Two state tests for location when covariates are present (Islam, M.Z. and Hewett, J.E.). Communications in Statistics-Theory and Methods, 23, (4), 1239-1247, 1994.

  • Tables of critical values for two group interim analyses. (Hewett, J.E., Petroski, G.F., Li, Y.). Communications in Statistics. Part B: Simulation and Computation, 24, (4), 825-852, 1995.

  • Selection of measures suitable for evaluating change in fibromyalgia clinical trails (Hewett, J.E., Buckelew, S.P., Johnson, J.C., Shaw, S.E., Huyser, B., Fu, Y.Z.). Journal of Rheumatology, 22, (12), 2307-2312, 1995.




Gary F. Krause , Ph.D., Virginia Polytechnic Institute, 1963.

Profile:
His areas of specialization are in design of experiments, estimation and statistical genetics. He has done research in plant and animal breeding, experimental technique, sample survey design and digital computing.

Selected Publications:

  • Predicting chronic lethality of chemicals to fishes from acute toxicity test data: multifactor probit analysis (with Lee, G., Ellersieck, M.R. and Mayer, F.L.). Environmental Toxicology & Chemistry, 14 (1995), (2), 345-349.

  • Predicting chronic lethality of chemicals to fishes from acute toxicity test data: Theory of accelerated life testing (with Sun, K., Mayer, F.L., Ellersieck, M.R. and Basu, A.). Environmental Toxicology and Chemistry. 14 (1995), (10), 1745-1752.




Richard Madsen , Ph.D., Iowa State University, 1971.

Profile:
His area of interest is applied statistics and application of statistics to medical problems. Current research interests include generalized binomial models and repeated significance testing for parametric and nonparametric tests. He is a consultant to the School of Nursing and is a member of the Division of Biostatistics in the School of Medicine. He also serves as statistician on major grants from the National Institutes of Health and The National Library of Medicine.

Selected Recent Publications:

  • Books:

    • Statistical Concepts - with Applications to Business and Economics (with M. Moeschberger), Second Edition. Prentice-Hall, 1986.

    • Introductory Statistics for Business and Economics (with M. Moeschberger). Prentice-Hall, 1983.

    • Statistical Concepts with Applications to Business and Economics (with M. Moeschberger). Prentice-Hall, 1980.

    • Markov Chains with Applications (with Dean L. Isaacson). John Wiley and Sons, 1976.

  • Selected Papers:

    • Temperature Effect on Nausea during Fluorescein Angiography (with L. Lee et al). Ophthalmology, 108, 1193-1195, 2001.

    • Randomized Clinical Trial of a Quality Improvement Intervention in Nursing Homes (with M. Rantz et al). The Gerontologist, 41(4), 525-538, 2001.

    • Clinical findings associated with radiographic pneumonia in nursing home residents (with David Mehr et al). Journal of Family Practice, 50, 931-937, 2001.

    • Predicting Mortality in Nursing Home Residents With Lower Respiratory Tract Infection (with D. Mehr et al). Journal of the American Medical Association, 286(19), 2427-2436, 2001.

    • Using Telemedicine to Avoid Transfer of Rural Emergency Department Patients (with L. Hicks et al). The Journal of Rural Health, 17(1), 220-228, 2001.

    • Population-Specific Histological Age-Estimating Method: A Model for Known African-American and European-American Skeletal Remains (with H. Cho et al). Journal of Forensic Sciences, 47(1), 12-18, 2002.




Athanasios C. Micheas , Ph.D., University of Connecticut, 2001.

Profile:
His research interests include Statistical Shape Analysis using landmark based approaches in both Bayesian and classical frameworks, Bayesian loss robustness and Model checking.

Selected Recent Publications:

  • Ranges of posterior expected losses and epsilon-robust actions (with D.K. Dey). In Robust Bayesian Analysis (Eds. D.Insua and F.Ruggeri; Springer-Verlag). Lecture Notes Monograph Series, Series #152, 145-160, 2000.

  • Prior and posterior predictive p-values in the one-sided location parameter testing problem (with D.K. Dey). Sankhya, Series A, 2002 (to appear).



Lawrence D. Ries , Ph.D., University of Missouri-Columbia, 1995.

Profile:
Dr. Ries serves as the Lower Division Coordinator for the department. His primary interests are issues relating to undergraduate education, including curriculum development, graduate instructor training and supervision, educational technology, and statistical consulting.


Paul Speckman , Ph.D., University of California at Los Angeles, 1976.

Profile:
Current research interests include smoothing in regression and density estimation; asymptotics; additive and semiparametric models; semiparametric longitudinal data models; applications to forecasting travel demand. His 1995-1996 academic year was spent on sabbatical at the Australian National University, the National Institute of Statistical Sciences and North Carolina State University.

Selected Recent Publications:

  • Posterior distribution of hierarchical models using CAR (1) distributions (with D. Sun and R.K. Tsutakawa). Biometrika, 86, 341-350, 1999.

  • A model for predicting maximum and 8-hr average ozone in Houston (with J.M. Davis). Atmospheric Environment, 33, 2487-2500, 1999.

  • Random effects in generalized linear mixed models (GLMMs) (with D. Sun and R.K. Tsutakawa). In Generalized Linear Models: A Bayesian Perspective (Eds. D. Dey, S. Ghosh and B. Mallick; Marcel Dekker Inc). Biostatistics Series, Series #5, 23-39, 2000.

  • Regression models for air pollution and daily mortality: analysis of data from Birmingham, Alabama (with R.L. Smith et al). Environmetrics, 11, 719-743, 2000.




Dongchu Sun , Ph.D., Purdue University, 1991.

Profile:
Current research interests include Bayesian and decision theory,reliability and survival analysis, spatial statistics, sequential analysis, statistical computation, and applications to forecasting travel demand

Selected Recent Publications:

  • Posterior distribution of hierarchical models using CAR (1) distributions (with R.K. Tsutakawa and Speckman). Biometrika, 86, 341-350, 1999.

  • A bivariate Bayesian method for improving estimators of mortality rates with 2-fold CAR model (with H. Kim and R.K. Tsukatawa). Journal of the American Statistical Association, 96, 1506-1521, 2001.

  • Bayesian analysis for bird nest survival models (with Z. He and Y. Tra). Biometrics, 57, 1059-1066, 2001.

  • Frequentist risks of Bayesian estimators of vector-autoregressive models based on noninformative priors (with Shawn Ni). To appear in the Journal of Econometrics, 2002.




(Tony) Jianguo Sun , Ph.D., University of Waterloo in 1992.

Profile:
His current research interests focus on biostatistics and include clinical trials, survival analysis, longitudinal data analysis, incomplete data analysis, and general statistical inference. He is particularly interested in AIDS data analysis and spectrum analysis.

Selected Recent Publications:

  • Regression Analysis of Panel Count Data with Covariate-Dependent Observation and Censoring Times (with L.J. Wei). Journal of the Royal Statistical Society, Series B, 62, 293-302, 2000.

  • A Note on Principal Component Analysis for Multi-dimensional Data. Statistics and Probability Letters, 46, 69-73, 2000.

  • Evaluation of Traffic Injury Prevention Programs Using Counting Process Approaches (with Y. Kim et al). Journal of the American Statistical Association, 96, 469-475, 2001.

  • A Semiparametric Regression Analysis of CD4 Cell Counts. Statistics in Medicine, 2001 (in press).




Christopher K. Wikle , Ph.D., Iowa State University, 1996

Profile:
Dr. Wikle's research interests include Spatial-temporal models, spatial statistics, hierarchical models, Bayesian methods, computational methods for large data sets, applications in geophysical and environmental science, large-scale atmospheric dynamics, climatology, atmospheric waves, and long-lead climate prediction.

Selected Recent Publications:

  • Hierarchical Bayesian space-time models (with L.M. Berliner and N. Cressie). Environmental and Ecological Statistics, 5, 117-154, 1998.

  • A dimension-reduced approach to space-time Kalman filtering (with N. Cressie). Biometrika, 86, 815-829, 1999.

  • Long-lead prediction of Pacific SSTs via Bayesian Dynamic Modeling (with L.M. Berliner and N. Cressie). Journal of Climate, 13, 3953-3968, 2000.

  • Spatiotemporal hierarchical Bayesian modeling: Tropical ocean surface winds (with R.F. Milliff et al). Journal of the American Statistical Association, 96, 382-397, 2001.




Tim Wright , Ph.D., University of Missouri-Columbia, 1968.

Profile:
Current research interests include asymptotic results, inferences for stochastic processes and order restricted statistical inferences. He is a fellow of the American Statistical Association and the Institute of Mathematical Statistics, and an elected member of the International Statistics Institute.

Selected Recent Publications:

  • Books:

    • Order Restricted Statistical Inference (with Tim Robertson and R.L.Dykstra). Wiley, 1988.

    • Advances in Order Restricted Statistical Inferences (with Tim Robertson and R.L. Dykstra). Springer-Verlag, 1986.

  • Selected Papers:

    • Nonhomogeneous Poisson Processes as Overhaul Models. (with R.L. Dykstra et al). Canadian Journal of Statistics, 24, 217-228, 1996.

    • Comparing Survival Times for Treatments with Those for a Control Under Proportional Hazards (with B. Singh). Lifetime Data Analysis, 4, 265-279, 1998.

    • Approximating the Powers of Order Restricted Log Rank Tests at Local Alternatives (with B. Singh). Statistics and Probability Letters, 7-17, 1999.

    • Powers of Some One-Sided Multivariate Tests with the Population Covariance Matrix Known up to a Multiplicative Constant (with S. Chongcharoen and B. Singh). Journal of Statistical Planning and Inference, 2002 (to appear).




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