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The proliferation of social networks with large scale information dissemination capabilities, such as Twitter, significantly increases the degree of observability of critical events, such as natural or man-made disasters. This paper analyzes the extent ...

Leases have proved to be an effective concurrency control technique for distributed systems that are prone to failures. However, many benefits of leases are only realized when leases are granted for approximately the time of expected use. Correct ...

One of Java's strengths lies in its support for multithreading—in both its syntax and its libraries. With thread-safe libraries, however, programmers often get stronger synchronization than they need. For example, string concatenation triggers the ...

This paper presents a summary of some of the work-in-progress within the Alexandria Digital Library Project. In particular, we present scalable methods of locating information at different levels within a distributed digital library environment. ...

With the recent improvements in network and processor speeds, several data intensive applications have become much more feasible than ever before. The only practical solution for storing such enormous amounts of data is tertiarystorage. Automated access ...