: Integrated access to distributed data is an important problem faced in scientific and commercial applications. A data integration system provides a unified view for users to subm...
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
Efficient storage and retrieval of trajectory indexes has become an essential requirement for moving objects databases. The existing 3DR-tree is known to be an effective trajectory...
Abstract. In this experience report, we present an evaluation of different techniques to manage concurrency in the context of application servers. Traditionally, using entity beans...
The popularity of batch-oriented cluster architectures like Hadoop is on the rise. These batch-based systems successfully achieve high degrees of scalability by carefully allocati...