David Andreoff Evans

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David Andreoff Evans (born 1948 in St. Louis) is a scientist in the field of computational linguistics, best known for his research into indexing using natural language processing, and in ontology learning, especially in medical informatics.


Evans attended Stanford University, receiving his Ph.D. in Computational Linguistics there in 1982. He attended the Inter-University Center for Japanese Language Studies in 1979.[1] He was on the faculty of Carnegie Mellon University from 1983 until 1996, and founded their Computational Linguistics Program and Laboratory for Computational Linguistics in 1986. Supported by a grant from Digital Equipment Corporation, he led a research project on "computational-linguistic approaches to indexing and retrieval of text" (CLARIT).[2] In September 1992, CLARIT was spun-out from Carnegie-Mellon as a company called Claritech. The technology was used to index the papers of politician H. John Heinz III.[3][4] Claritech became a research and development subsidiary of JustSystems and its name was changed to Clairvoyance Corporation in 1996, before becoming JustSystems Evans Research in 2007. [5]

He has made many contributions to the field of computational linguistics and information retrieval,[6] authoring books, many research papers, and is the holder of 25 US patents.[1]

Evans was elected a Fellow of the American College of Medical Informatics in 1999.[7]


  1. ^ a b "The IUC 50th Anniversary Symposium at Stanford University" (PDF). September 7, 2013. p. 8. Retrieved February 5, 2017. 
  2. ^ David A. Evans, Steve K. Handerson, Robert G. Lefferts, Ira A. Monarch (November 1991). A Summary of the CLARIT Project. Report No. CMU-LCL-91-2 (Report). Carnegie Mellon University Department of Philosophy. Retrieved February 5, 2017. 
  3. ^ Edward A. Galloway and Gabrielle V. Michalek (1995). "The Heinz Electronic Library Interactive On-Line System (HELIOS)". Public Access Computer Systems Review. 6 (4). 
  4. ^ "Carnegie Mellon Receives $1 Million to Develop Electronic Archive for Heinz Papers". Press Release. Carnegie Mellon University. August 25, 1994. Retrieved February 4, 2017. 
  5. ^ "JustSystems Evans Research, Inc. is the new name of Clairvoyance Corporation". JSERI. Archived from the original on June 2, 2009. Retrieved February 4, 2017. 
  6. ^ Noun-phrase analysis in unrestricted text for information retrieval, David A. Evans and Chengxiang Zhai. Proceedings of the 34th Annual Meeting of the Association for Computational Linguistics, 1996, pp. 17–24
  7. ^ "David A. Evans, PhD, FACMI". Biography and photograph when elected. American College of Medical Informatics. 1999. Retrieved February 7, 2017.