clarke@utcsri.UUCP (Jim Clarke) (09/01/85)
(SF = Sandford Fleming Building, 10 King's College Road)
(GB = Galbraith Building, 35 St. George)
COLLOQUIUM, Tuesday, September 10, 11 am, SF1105
Dr. Sidney E. Harris
Decision Sciences Laboratory
Georgia State University
"Models of Unstructured Office Activity"
Models of office activities have been primarily oriented towards
office work that is structured and organized. However, the design of
office information systems to match human cognitive processes is becoming
increasingly important as systems become more sophisticated. In this
presentation, some empirical results and models of unstructured office
activity will be reviewed. Emphasis will be placed on problem-solving and
document preparation applications and the way in which models can facili-
tate needs assessment evaluation.
ARTIFICIAL INTELLIGENCE SEMINAR, Tuesday, September 10, 3 pm, SF1105
Professor David Touretzky
Carnegie-Mellon University
"Symbols among the Neurons:
Details of a Connectionist Inference Architecture"
Pattern matching and variable binding are easily implemented in con-
ventional computer architectures, but not necessarily in all architectures.
In a distributed neural network architecture each symbol is represented by
activity in many units and each unit contributes to the representation of
many symbols. Manipulating symbols using this type of distributed
representation is not as easy as with a local representation where each
unit denotes one symbol, but there is evidence that the distributed
approach is the one chosen by nature. We describe a working implementation
of a production system interpreter in a neural network using distributed
representations for both symbols and rules. The research provides a
detailed account of two important symbolic reasoning operations, pattern
matching and variable binding, as emergent properties of collections of
neuron-like elements. The success of our production system implementation
goes some way towards answering a common criticism of connectionist
theories: that they aren't powerful enough to do symbolic reasoning.
ARTIFICIAL INTELLIGENCE SEMINAR, Thursday, September 12, 11 am., SF1105
Professor Veronica Dahl
Simon Fraser University
"Gapping Grammars for Natural Language Analysis"
COMPUTER ALGEBRA SEMINAR, Thursday, September 12, 4 pm., GB414
Scott McCallum
DCS, University of Toronto
"Survey of Computer Algebra"
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Jim Clarke -- Dept. of Computer Science, Univ. of Toronto, Canada M5S 1A4
(416) 978-4058
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