It is common knowledge that the modern world generates and stores information at an increasing rate. A typical example is the emerging field of e-science, where the adoption of high-performance computing has led to the generation of vast volumes of scientific data. The usefulness of the stored information, of course, depends crucially on the ability to query it effectively, and hence on the use...

“Big ideas” drive the disciplines. In biology, the insights of Darwin generated evolutionary theory. In chemistry, Mendeleev’s vision of the organization of elements predicted subsequent discoveries. In computing, the database and associated database management systems (DBMS) are one of the “big ideas”. The database was conceptually possible prior to the development of the computer, but it was ...

Available in a shrink-wrapped package at the book store ⌧not available in that form for non-students Both are on hold in the library

This paper describes a customized database and a comprehensive set of queries that can be used for systematic benchmarking of relational database systems. Designing this database and a set of carefully tuned benchmarks represents a first attempt in developing a scientific methodology for performance evaluation of database management systems. We have used this database to perform a comparative e...

In this paper, we address one important aspect of the problem of designing a cooperative deductive database system, namely, allocation of rules across the deductive database systems. We identify communication cost as the primary consideration in allocation of rules. The problem of optimal allocation of rules has been shown NP-complete, which has prohibitive execution times for large knowledge b...

3.

This paper discusses a general framework for multimedia DBMSs. We use our two ongoing multimedia projects (a SGML/HyTime DBMS and an image DBMS) as examples to support the general framework. Although multimedia data (text, sound, image, video and animation) are diierent in terms of their processing, similarities exist in the ways to handle these data. They all are big with complex structures an...

Active database systems have received increasing interest from both research and industrial communities. However, trigger conditions in the active rules are often dif-cult to specify, especially as the events and/or conditions complexities increase. To remedy this problem, we propose an active database system that supports rules with conceptual terms, approximate operators, and complex events. ...

Data Models and Temporal Databases 5 Booking Meeting Room Time DB Group DC1331 06-Jan-04.10:00 DB Group DC1331 06-Jan-04.10:01 DB Group DC1331 06-Jan-04.10:02 DB Group DC1331 16-Jan-04.11:59 Intro to Databases MC4042 06-Jan-04.10:00 Intro to Databases MC4042 06-Jan-04.11:19 Intro to Databases MC4042 08-Jan-04.10:00 Intro to Databases MC4042 08-Jan-04.11:19 Fig. 19.1 A Fragment of a Timestamp In...