| Revision as of 03:42, 22 April 2007 view sourceAllan McInnes (talk | contribs)Extended confirmed users, Pending changes reviewers4,932 editsm oops - close ref tag← Previous edit | Revision as of 03:44, 22 April 2007 view source Allan McInnes (talk | contribs)Extended confirmed users, Pending changes reviewers4,932 editsm cut spurious inclusion in inline citeNext edit → | ||
| Line 20: | Line 20: | ||
| }} | }} | ||
| '''Carl E. Hewitt''' is an Associate Professor (]) in the ] and ] department at the ] (MIT). Hewitt obtained his PhD in mathematics at MIT in 1971, under the supervision of ], ], and Mike Paterson. He is known for his design of ],<ref name="kay1996">{{cite journal|last=Kay |first=Alan|authorlink=Alan Kay|title=The Early History of Smalltalk|url=http://www.smalltalk.org/downloads/papers/SmalltalkHistoryHOPL.pdf|journal=ACM SIGPLAN|volume=28|issue=3|date=March 1993|pages=69-75|quote=...Carl Hewitt's PLANNER, a programmable logic system that formed the deductive basis of Winograd's SHRDLU...}}</ref>, which was the first ] ] based on procedural plans that were invoked using pattern-directed invocation from assertions and goals,<ref>Carl Hewitt. IJCAI. 1969. | '''Carl E. Hewitt''' is an Associate Professor (]) in the ] and ] department at the ] (MIT). Hewitt obtained his PhD in mathematics at MIT in 1971, under the supervision of ], ], and Mike Paterson. He is known for his design of ],<ref name="kay1996">{{cite journal|last=Kay |first=Alan|authorlink=Alan Kay|title=The Early History of Smalltalk|url=http://www.smalltalk.org/downloads/papers/SmalltalkHistoryHOPL.pdf|journal=ACM SIGPLAN|volume=28|issue=3|date=March 1993|pages=69-75|quote=...Carl Hewitt's PLANNER, a programmable logic system that formed the deductive basis of Winograd's SHRDLU...}}</ref>, which was the first ] ] based on procedural plans that were invoked using pattern-directed invocation from assertions and goals,<ref>Carl Hewitt. IJCAI. 1969.</ref> and his work on the ] of computation.<ref>{{cite book|last=Filman|first=Robert|coauthors=Daniel Friedman|title=Coordinated Computing - | ||
| *Mike Paterson and Carl Hewitt. ''Comparative Schematology'' MIT AI Memo 201. August 1970.</ref> and his work on the ] of computation.<ref>{{cite book|last=Filman|first=Robert|coauthors=Daniel Friedman|title=Coordinated Computing - | |||
| Tools and Techniques for Distributed Software|year=1984|publisher=McGraw-Hill|id=ISBN 0-07-022439-0|url=http://ic.arc.nasa.gov/people/filman/text/dpl/dpl.html|chapter=Actors|pages= pp. 145|quote=Carl Hewitt and his colleagues at M.I.T. are developing the Actor model.}}</ref> | Tools and Techniques for Distributed Software|year=1984|publisher=McGraw-Hill|id=ISBN 0-07-022439-0|url=http://ic.arc.nasa.gov/people/filman/text/dpl/dpl.html|chapter=Actors|pages= pp. 145|quote=Carl Hewitt and his colleagues at M.I.T. are developing the Actor model.}}</ref> | ||
Revision as of 03:44, 22 April 2007
| Carl Hewitt | |
|---|---|
| File:Carl Hewitt (FLoC 2006).jpgCarl Hewitt at FLoC 2006 | |
| Nationality |  American |
| Alma mater | MIT |
| Known for | Planner Actor model Open Systems Scientific Community Metaphor Organizational Computing |
| Awards | IBM Japan Chair at Keio |
| Scientific career | |
| Fields | Education Mathematics Computer Science Logic Philosophy and Sociology of Science |
| Institutions | MIT (Emeritus) |
| Doctoral advisor | Seymour Papert |
| Doctoral students | Gul Agha Russ Athkinson Henry Baker Gerry Barber Peter Bishop Will Clinger Peter de Jong Irene Greif Kenneth Kahn Bill Kornfeld Aki Yonezawa |
.jpg){kind=link}
Carl E. Hewitt is an Associate Professor (Emeritus) in the Electrical Engineering and Computer Science department at the Massachusetts Institute of Technology (MIT). Hewitt obtained his PhD in mathematics at MIT in 1971, under the supervision of Seymour Papert, Marvin Minsky, and Mike Paterson. He is known for his design of Planner,, which was the first Artificial Intelligence programming language based on procedural plans that were invoked using pattern-directed invocation from assertions and goals, and his work on the Actor model of computation.
Hewitt's work on Planner introduced the notion of the "procedural embedding of knowledge",, which was an alternative to the logical approach to knowledge encoding for artificial intelligence pioneered by John McCarthy. A subset of Planner called Micro Planner was implemented by Gerry Sussman, Eugene Charniak and Terry Winograd. It was used in Winograd's famous SHRDLU program, and Eugene Charniak's natural language story understanding work.
Hewitt's work on the Actor model built on Lisp, Simula, capability-based systems, packet switching and early versions of Smalltalk, and was influential in the development of the Scheme programming language
Using program schemas in collaboration with Mike Paterson, Hewitt proved that recursion is more powerful than iteration and that parallelism is more powerful than recursion. In collaboration with Henry Baker, he published physical laws for computation which they then used to derive the continuity criterion for computable functions of Dana Scott. Using participatory semantics, he proved that coroutines are more powerful than recursion and that Concurrency is more powerful than parallel coroutines.
Together with Bill Kornfeld, he developed the Scientific Community Metaphor. He has also made contributions in the areas of garbage collection, programming language design and implementation, open systems, Organizational Computing, paraconsistent logic, and denotational semantics of concurrency with his students and colleagues.
Subsequently Hewitt has worked to integrate sociology, anthropology, organization science, the philosophy of science, and services science into information science.
He has an interest in massive concurrency.
References
- Kay, Alan (March 1993). "The Early History of Smalltalk" (PDF). ACM SIGPLAN. 28 (3): 69–75.
...Carl Hewitt's PLANNER, a programmable logic system that formed the deductive basis of Winograd's SHRDLU...
- Carl Hewitt. PLANNER: A Language for Proving Theorems in Robots IJCAI. 1969.
- Filman, Robert (1984). "Actors". Coordinated Computing - Tools and Techniques for Distributed Software. McGraw-Hill. pp. pp. 145. ISBN 0-07-022439-0.
Carl Hewitt and his colleagues at M.I.T. are developing the Actor model.
{{cite book}}:|pages=has extra text (help); Unknown parameter|coauthors=ignored (|author=suggested) (help); line feed character in|title=at position 25 (help) - Carl Hewitt. Procedural Embedding of Knowledge In Planner IJCAI. 1971.
- Gerry Sussman and Terry Winograd. Micro-planner Reference Manual AI Memo No, 203, MIT Project MAC, July 1970.
- Terry Winograd. Procedures as a Representation for Data in a Computer Program for Understanding Natural Language MIT AI TR-235. January 1971.
- Carl Hewitt, Peter Bishop and Richard Steiger. A Universal Modular Actor Formalism for Artificial Intelligence IJCAI. 1973.
- Krishnamurthi, Shriram (December 1994). "An Introduction to Scheme". Crossroads. 1 (2).
- Mike Paterson and Carl Hewitt. Comparative Schematology MIT AI Memo 201. August 1970.
- Carl Hewitt and Henry Baker Laws for Communicating Parallel Processes IFIP-77, August 1977
- Carl Hewitt and Henry Baker Actors and Continuous Functionals Proceeding of IFIP Working Conference on Formal Description of Programming Concepts. August 1–5, 1977
- William Kornfeld and Carl Hewitt. The Scientific Community Metaphor MIT AI Memo 641. January, 1981.
- Henry Lieberman and Carl Hewitt. A real Time Garbage Collector Based on the Lifetimes of Objects CACM. June, 1983.
- Carl Hewitt. The Challenge of Open Systems Byte Magazine. April 1985. Reprinted in The foundation of artificial intelligence---a sourcebook Cambridge University Press. 1990.
- Carl Hewitt (2006a). The repeated demise of logic programming and why it will be reincarnated What Went Wrong and Why: Lessons from AI Research and Applications. Technical Report SS-06-08. AAAI Press. March 2006.
- ^ Carl Hewitt What is Commitment? Physical, Organizational, and Social COIN@AAMAS. April 27, 2006.
External links
- DBLP has an incomplete set of bibliographic entries for Carl Hewitt that extends only to 1993.
- Future and Recent Hewitt seminars.