Roy F Rada

Roy F Rada (born June 13, 1951) is a professor emeritus whose research on artificial intelligence appeared in journal articles from 1979 [1] till 2018.[2]

Roy Rada
Born (1951-06-13) June 13, 1951
ResidenceMaryland, United States
Alma materYale University
University of Illinois
Baylor College of Medicine
Scientific career
FieldsArtificial intelligence
Semantic web
Institutions UMBC
National Institutes of Health
University of Liverpool
Washington State University
Wayne State University
ThesisEvolutionary Structure and Search (1981)
Doctoral advisorDavid Waltz
Influences Michael Conrad
John Holland

Early life and education

Rada was born in Vienna, Austria in 1951. He graduated from Yale University in 1973 with a B.Sc. in Psychology, from Baylor College of Medicine in 1977 with a M.D., and from University of Illinois at Urbana-Champaign in 1981 with a Ph.D. in Computer Science. Rada was licensed to practice medicine from 1977 to 1988.[3]


Rada worked with Michael Conrad at Wayne State University from 1981 to 1983.[4] He worked at the National Institutes of Health from 1983 to 1988 where he was chief of the Medical Subject Headings Section of the National Library of Medicine [5] and editor of Index Medicus.[6] From 1988 to 1995 he was a professor of Computer Science at the University of Liverpool. [7] From 1995 to 1998 he was the Boeing Distinguished Professor of Software Engineering at Washington State University in Pullman, Washington. Rada was the first director of the Online Masters in Information Systems at the University of Maryland, Baltimore County that was launched on Blackboard in 1999, [8] and he retired in 2015 as a Professor Emeritus of Information Systems at the University of Maryland, Baltimore County. Rada’s research assistant Karl Strickland[9][10] was imprisoned in 1993 for hacking in a landmark British case,[11] and his student Harold T. Martin III was arrested for security breaches.[12] Rada was chair of the Association for Computing Machinery, Special Interest Group on Biomedical Computing from 1990 to 1997.[13] He was the Founding Chair of the Healthcare Information and Management Systems Society Special Interest Group on the Health Insurance Portability and Accountability Act for which he was awarded the Outstanding SIG Member Award in 2002.[14]


At the National Institutes of Health, Rada’s team showed how various medical knowledge bases could be semi-automatically combined to improve information retrieval.[15] That work led to his being honored as a winner of the 1990 Eliot Prize for a work judged most effective in furthering medical librarianship.[16] One of the tools that Rada’s team developed to facilitate using medical knowledge in retrieving information was spreading activation across semantic nets.[17] Semantic nets underlying documents are traversed to facilitate individuals handling single documents, groups working across the Internet to access or create documents, and organizations manipulating libraries.[18] Software engineers link their code and documentation semi-automatically to facilitate collaboration in building software systems,[19] and students benefit from peer-peer commenting online.[20] Rada's book on hypertext[21] was published in paperback and also simultaneously in multiple electronic formats, including Guide and HyperTIES. Rada formed an electronic publishing company called Hypermedia Solutions Limited in 1993,[22] and that company helped make the first multimedia CD-ROM published in web format.[23] Sixteen Ph.D. students earned their degrees under Rada's supervision.[24] For his contributions to computing,[25] Rada was elected a Fellow of the Association for Computing Machinery.[26]


  1. Rada, Roy; Evans, Lynn (1979). "Automated Problem Encoding System for Ambulatory Care". Computers and Biomedical Research. 12: 131–139. doi:10.1016/0010-4809(79)90011-9.
  2. Du, Jie; Rada, Roy (2018). "A Semantic-Based, Distance-Proportional Mutation for Stock Classification". Expert Systems with Applications. 95 (1): 212–223. doi:10.1016/j.eswa.2017.11.029.
  3. "Texas Medical Board: Look Up a License". Texas Medical Board. Archived from the original on 2018-08-17. Retrieved June 13, 2018.
  4. Conrad, M; Harth, E; Martinez, H; Rada, R; Zeigler, B; Waltz, D (1984). "Natural and Artificial Intelligence". Cognition and Brain Theory. 7 (1): 89–104.
  5. "Dr. Rada Named MeSH Chief". The NIH Record. -U.S. Department of Health and Human Services. 37 (21): 6. November 5, 1985.
  6. Index Medicus, Bethesda, Maryland: National Institutes of Health, 1988
  7. "Google Scholar citations". Google Scholar. Archived from the original on 2017-02-22. Retrieved November 3, 2018.
  8. "History of UMBC". University of Maryland Baltimore County. Archived from the original on 2015-06-15. Retrieved November 3, 2018.
  9. Mili, Hafedh; Rada, Roy; Wang, Weigang; Strickland, Karl (1994). "Practitioner and SoftClass: A Comparative Study of Two Software Reuse Research Projects". Journal of Systems and Software. 25 (2): 147–170. doi:10.1016/0164-1212(94)90003-5.
  10. Wang, Weigang; Rada, Roy; Strickland, Karl; Ghaoui, Claude (1992). "An Expertext Authoring Tool". Information and Decision Technologies. 18 (2): 101–114.
  11. Campbell, Duncan (May 22, 1993). "British computer hackers behind bars: Two hackers become the first offenders to receive jail sentences under the 1990 Computer Misuse Act". The Guardian. Archived from the original on 2016-03-13. Retrieved June 13, 2018.
  12. Shane, Scott (October 7, 2016). "Hoarder, Yes, but a Leaker? U.S. Isn't Sure". New York Times. Archived from the original on 2018-06-17. Retrieved June 13, 2018.
  13. ACM SIGBIO Newsletter, New York, New York: Association for Computing Machinery, Special Interest Group on Biomedical Computing, 1997
  14. "History of the Healthcare Information and Management Systems Society" (PDF). Healthcare Information and Management Systems Society. Archived (PDF) from the original on 2017-03-29. Retrieved November 3, 2018.
  15. Rada, Roy (1985). "Gradualness Facilitates Knowledge Refinement". IEEE Transactions on Pattern Analysis and Machine Intelligence. 15 (5): 523–530.
  16. "Medical Library Association Ida and George Eliot Prize". Medical Library Association. Archived from the original on 2017-06-30. Retrieved August 1, 2018.
  17. Rada, Roy; Mili, Hafedh; Bicknell, Ellen; Blettner, Maria (1989). "Development and Application of a Metric on Semantic Nets". IEEE Transactions on Systems, Man, and Cybernetics. 19 (1): 17–30. doi:10.1109/21.24528.
  18. Rada, Roy (1995). Interactive Media. New York, New York: Springer-Verlag.
  19. Rada, Roy (1999). Reengineering Software: How to Reuse Programming to Build New, State-of-the-Art Software. AMACOM. ISBN 0814405096.
  20. Rada, Roy (2002). Understanding Virtual Universities. London, England: Intellect. ISBN 9781841500522.
  21. Rada, Roy (1991). Hypertext: from Text to Expertext. London, England: McGraw-Hill. p. 256. ISBN 978-1469640662.
  22. "Hypermedia Solutions Limited". Retrieved June 13, 2018.
  23. ACM SIGBIO CD-ROM on Medical Informatics and Multimedia. Association of Computing Machinery. 1994.
  24. "Academic Tree". Academic Family Tree. Retrieved June 13, 2018.
  25. "dblp computer science bibliography". University of Trier, Germany. Retrieved June 13, 2018.
  26. "ACM Recognizes Excellence: Fellows: Recipients". Association for Computing Machinery. 1995. Archived from the original on 2018-06-24. Retrieved June 13, 2018.
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