National Institute of Statistical Sciences

Alan F. Karr
Director

 

Electronic Mail: karr@niss.org

 

Education

Current Positions

Previous Positions

Books

  1. Point Processes and their Statistical Inference (Marcel Dekker, New York, 1986).
  2. Point Processes and their Statistical Inference, second edition, revised and expanded (Marcel Dekker, New York, 1991).
  3. Probability (Springer-Verlag, New York, 1993).

Patents

  1. US Patent 5,937,064: System and Method for Visualization, Analysis and Control of a Dynamic Database. (with S. G. Eick, T. L. Graves, A. Mockus)

Selected Research Papers

  1. Weak convergence of a sequence of Markov chains. Z. Warsch. verw. Geb. 33 (1975) 41-48.
  2. Levy random measures. Ann. Probab. 6 (1978) 57-71.
  3. The inverse balayage problem for Markov chains. Stochastic Process. Appl. 7 (1978) 165-178. (with A. O. Pittenger)
  4. Markov chains and processes with a prescribed invariant measure. Stochastic Process. Appl. 7 (1978) 277-290.
  5. An inverse balayage problem for Brownian motion. Ann. Probab. 7 (1979) 186-191. (with A. O. Pittenger)
  6. Natural clades differ from `random' clades: simulations and analysis. Paleobiology 7 (1981) 115-127. (with S. M. Stanley, P. W. Signor, III, and S. Lidgard)
  7. State estimation for Cox processes on general spaces. Stochastic Process. Appl. 14 (1983) 209-232.
  8. Extreme points of certain sets of probability measures, with applications. Math. Opns. Res. 8 (1983) 74-85.
  9. Error bounds for reconstruction of a function f from a finite sequence <sgn(f(ti)+xi)>. SIAM J. Appl. Math. 43 (1983) 476-490. (with R. J. Serfling)
  10. Statistical inference for point process models of rainfall. Water Resources Res. 21 (1985)73-79. (with J. A. Smith)
  11. Nonlinear response to sustained load processes. J. Structural Engrg., ASCE 111 (1985) 142-157. (with K. C. Chou, R. B. Corotis)
  12. State estimation for Cox processes with unknown probability law. Stochastic Process. Appl. 20 (1985) 115-131.
  13. Flood frequency analysis using the Cox regression model. Water Resources Res. 22 (1986) 890-896. (with J. A. Smith)
  14. Estimation of Palm measures of stationary point processes. Prob. Th. Rel. Fields 74 (1987) 55-69.
  15. Maximum likelihood estimation in the multiplicative intensity model, via sieves. Ann. Statist. 15 (1987) 473-490.
  16. Maximum likelihood identification of neural point process systems. Biol. Cybern. 59 (1988) 265-275. (with E. S. Chornoboy, L. P. Schramm)
  17. Nonparametric survival analysis with time-dependent covariate effects: a penalized partial likelihood approach. Ann. Statist. 18 (1990) 329-353. (with D. M. Zucker)
  18. Statistical models and methods in image analysis: a survey. In I. V. Basawa and N. U. Prabhu, eds., Inference from Stochastic Processes, 1-25. (Dekker, New York, 1991).
  19. An empirical exploration of code evolution. In Proceedings of the International Workshop on Empirical Studies of Software Maintenance. (1996). (with A.~A. Porter, L.~G. Votta)
  20. Quality of real-time traffic information using probe vehicles. In Behavioral and Network Impacts of Driver Information Systems. (Wiley, New York, 1997). (with P. Thakuriah, A. Sen)
  21. Frequency of probe vehicle reports and variances of link travel time estimates. J. Transp. Engrg., ASCE (1997). (with A. Sen, P. Thakuriah, X. Zhu)
  22. Permeability study of cracked concrete. Cement Conc. Res. 27 (1997) 381-393. (with K. Wang, D. C. Jansen, S. P. Shah)
  23. Web-based text visualization. In Badilla, W., and Faulbaum. F., eds., SoftStat '97: Advances in Statistical Software 6, 3-10. Lucius & Lucius, Stuttgart. (with S. G. Eick, A. Mockus, T. L. Graves)
  24. Modeling software changes. In Minder, C.~E., and Friedl, F., eds., Good Statistical Practice, 175-179. Austrian Statistical Society, Vienna. (with S. G. Eick, A. Mockus, T. L. Graves)
  25. Statistical analyses of freeway traffic flows. Transp. Res. B. (To appear) (with C. Tebaldi, M. West).
  26. A Web laboratory for software data analysis. World Wide Web 1 (1998) 55-60. (with S. G. Eick, A. Mockus, T. L. Graves)
  27. Predicting fault incidence using software change history. IEEE Trans. Software Engrg. 26(7) (with T. L. Graves, J. S. Marron, H. Siy)
  28. Does Code Decay? Assessing the evidence from change management data. IEEE Trans. Software Engrg. (with S. G. Eick, T. L. Graves, J. S. Marron and A. Mockus)
  29. Real-Time Prediction of Incipient Congestion on Freeways from Detector Data. Submitted to Transp. Res. B. (with T. L. Graves, N. M Rouphail and P. Thakuriah)
  30. Experimental studies of the chloride permeability of concrete. Submitted to Int. J. Cement and Concrete Res. (with B. E. Ankenman, T. Igusa, S. Jaiswal, J. D. Picka, S. P. Shah, P. Styer and K. Wang).
  31. Experimental design for estimating a response surface and variance components. Submitted to Technometrics. (with B. E. Ankenman, H. Liu and J. D. Picka).
  32. Influence of microstructure and fracture on the transport properties in cement-based materials. In Brandt, A. M., et al., eds., Brittle Matrix Composites 5 199-220. Woodhead Publishing Ltd., Cambridge, UK. (with S. Jaiswal, T. Igusa, P. Styer and S. P. Shah).
  33. Permeability study of cracked concrete. Materials and Structures. 32 (1999) 370-376. (with C. Aldea, S. P. Shah).
  34. Effect of cracking on water and chloride permeability of concrete. Cement and Concrete Res. (with C. Aldea, S. P. Shah).
  35. Statistical studies of the conductivity of concrete using ASTM C1202-94. Concrete Sci. Engrg. (with S.~S. Jaiswal, J. D. Picka, T. Igusa, S. P. Shah, B. E. Ankenman, P. Styer) \item
  36. Effect of cracking on water and chloride permeability of concrete. ASCE J. Materials in Civil Engrg. 11(3) (1999) 181-187. (with C. Aldea, S. P. Shah)
  37. Variability of travel times on arterial streets: effects of signals and volume. Submitted to Transp. Res. C. (with T.~L. Graves, P. Thakuriah)
  38. Computer intrusion: detecting masqueraders. Submitted to Statist. Sci. (with M. Schonlau, W. DuMouchel, W.-H. Ju, M. Theus, Y. Vardi)
  39. Investigation of the extent of healing of cracked normal strength concrete. ASCE J. Materials Civil Engrg. (to appear) (with C. Aldea, W. J. Song, J. Popovics, S. P. Shah)
  40. Effect of microcracking on durability of high strength concrete. Transportation Res. Rec. (to appear) (with C. Aldea, S.~P. Shah)
  41. Experimental and statistical study of chloride permeability of cracked high strength concrete. Submitted to ASTM Cement, Concrete and Aggregates. (with C. Aldea, J.~D. Picka, S.~P. Shah)
  42. Visualizing software changes. Submitted to IEEE Trans. Software Engrg. (with S. G. Eick, T. L. Graves, A. Mockus, P. Schuster)
  43. Visual scalability. J. Comp. Graphical Statist. (to appear) (with S. G. Eick)
  44. Web-based systems that disseminate information from data but preserve confidentiality. IEEE Computer (with J. Hernandez, S. Karimi, J. Lee, K. Littwin, A. Sanil)

Professional Activities

Honors