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Hartson, H. Rex – Journal of the American Society for Information Science, 1974
A model which relates the access control and indexing functions. The model is based on concept protection which allows a practically unbounded number of levels (subsets) of protection without requiring a fixed hierarchy among the levels. This protection is offered independently for each of the user operations allowed. (Author)
Descriptors: Automatic Indexing, Computer Science, Confidentiality, Data Processing
Peer reviewed Peer reviewed
Solomon, Susan L. – Journal of the American Society for Information Science, 1974
An analysis to ascertain which electronic data processing (EDP) systems are most flexible in processing wide ranges of volumes efficiently. A simulation model of the job environment of three common EDP systems provides information on the shape of their cost functions in the neighborhood of optimality. (Author/LS)
Descriptors: Computer Programs, Cost Effectiveness, Data Processing, Evaluation