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ACM Computing Surveys (CSUR), Volume 21 Issue 4, Dec. 1989

Security-control methods for statistical databases: a comparative study
Nabil R. Adam, John C. Worthmann
Pages: 515-556
DOI: 10.1145/76894.76895
This paper considers the problem of providing security to statistical databases against disclosure of confidential information. Security-control methods suggested in the literature are classified into four general approaches: conceptual, query...

Modeling for text compression
Timothy Bell, Ian H. Witten, John G. Cleary
Pages: 557-591
DOI: 10.1145/76894.76896
The best schemes for text compression use large models to help them predict which characters will come next. The actual next characters are coded with respect to the prediction, resulting in compression of information. Models are best formed...

Debugging concurrent programs
Charles E. McDowell, David P. Helmbold
Pages: 593-622
DOI: 10.1145/76894.76897
The main problems associated with debugging concurrent programs are increased complexity, the "probe effect," nonrepeatability, and the lack of a synchronized global clock. The probe effect refers to the fact that any attempt to observe the...