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As a Professor in the Computer Science Department of the Polytechnical Institute of Bucharest, Romania, I would like to bring to your attention the effort of a group of professionals, researchers, students and professors around the world. This effort, called “Free UNIX for Romania”, has been...
The distributed locking based approaches to concurrency control in a distributed database system, are prone to occurrence of deadlocks. An algorithm for deadlock prevention has been considered in this proposal. In this algorithm, a transaction is executed by forming wait for relations with other...
Workflow management is primarily concerned with dependencies between the tasks of a workflow, to ensure correct control flow and data flow. Transaction management, on the other hand, is concerned with preserving data dependencies by preventing execution of conflicting operations from multiple,...
A cornerstone of modern database systems is physical data independence, i.e., the separation of a type and its associated operations from its physical representation in memory and on storage media. Users manipulate and query data at the logical level; the DBMS translates these logical operations...
ACM SIGMOD is pleased to announce a new set of on line services for members, including on line copies of portions of the SIGMOD Record (including all funding columns since 1991, and wider coverage of the Record beginning with this issue), an archive of recent conference announcements, and a...
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