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1992
Technical report TR92-17. The AGM postulates for knowledge base revision are a set of rationality postulates that revision operations on knowledge systems should satisfy. Defining an appropriate semantics for belief revision that satisfies all of the postulates has been considered a challenging...
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Autoepistemic Circumscription and Logic Programming
1992
Technical report TR92-18. We propose a framework of autoepistemic reasoning in which the underlying semantics is determined by the choice of a nonmonotonic inference mechanism and by specifying a belief constraint. While the latter makes the approach flexible in meeting possibly different...
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Non-Timber Values in Canadian Forests: An Assessment of Uses, Techniques and Data Availability
Download1992
In 1989 the Canadian forest industry shipped nearly $50 billion of forest products, generated over $3.5 billion in government revenues, and accounted for $19.5 billion of Canada's trade surplus (Forestry Canada, 1991). The forest provides the products which are used to generate trade surpluses...
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1992
Novak, Frank, Melvin, Richard, Dailly, Sally, Bauer, Leonard
The objectives of this study were to measure returns and the variation in returns for hog finishers in Alberta. From this base, different strategies were assessed as to their ability to reduce the level of price risk faced by producers. The National Tripartite Stabilization Program was reviewed...