Now showing items 1-4 of 4
A More General Model For Handling Missing Information In Relational DataBases Using A 3-Valued Logic
(SIGMOD Record, 1991-09)
Codd proposed the use of two interpretations of nulls to handle missing information in relational databases that may lead to a 4-valued logic [Codd86, Codd87]. In a more general model, three interpretations of nulls are ...
An Efficient Starvation-Free Semaphore Solution for the Graphical Mutual Exclusion Problem.
(The Computer Journal, 1991-08)
A fast method for constructing efficient solutions for graphical mutual exclusion problems based on semaphores associated with processes is described. The number of semaphores used is equal to the number of processes in ...
Using CLIPS as the cornerstone of a graduate expert systems course
(Proceedings of the 2nd Annual CLIPS Users Conference, 1991-09)
The effective use of the C Language Integrated Production System (CLIPS) as a cornerstone in a graduate expert systems course is described. The course include 8 or 9 hours of in-depth lecturing in CLIPS, as well as a broad ...
Dining Philosophers Revisited, Again
(SIGCSE Bulletin, 1991-06)
This paper describes a problem in the solution of the dining philosophers problem by Gingras  that makes it inefficient, instead of the claimed maximal efficiency. A correct implementation is presented. Even then, the ...