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ACM Transactions on Computer Systems (TOCS), Volume 6 Issue 2, May 1988

A relational approach to monitoring complex systems
Richard Snodgrass
Pages: 157-195
DOI: 10.1145/42186.42323
Monitoring is an essential part of many program development tools, and plays a central role in debugging, optimization, status reporting, and reconfiguration. Traditional monitoring techniques are inadequate when monitoring complex systems such...

The NTree: a two dimension partial order for protection groups
Ravinderpal S. Sandhu
Pages: 197-222
DOI: 10.1145/42186.42187
The benefits of providing access control with groups of users rather than with individuals as the unit of granularity are well known. These benefits are enhanced if the groups are organized in a subgroup partial order. A class of such partial...