Advances in Information Systems: Second International - download pdf or read online

By Johanna Wenny Rahayu, David Taniar (auth.), Tatyana Yakhno (eds.)

ISBN-10: 3540000097

ISBN-13: 9783540000099

This quantity comprises the court cases of the second one overseas convention on Advances in details platforms (ADVIS) held in Izmir, Turkey, 23–25 October 2002. This convention used to be devoted to the reminiscence of Prof. Esen Ozkarahan. He was once an excellent researcher who made a vital contribution to the improvement of data structures. Prof. Ozkarahan used to be one of many pioneers of database computer study and database platforms in Turkey. This convention was once prepared by means of the pc Engineering division of Dokuz Eylul college in Izmir. This division used to be demonstrated in 1994 via Prof. Ozkarahan and he labored there for the final ?ve years of his lifestyles. the most target of the convention used to be to compile researchers from everywhere in the global operating in di?erent parts of knowledge platforms, to proportion new rules and current their most recent effects. This time we bought ninety four submissions from 27 nations. this system committee chosen forty papers for presentation on the convention. through the convention a workshop was once prepared at the subject “New details applied sciences in Education”. The invited and authorised cont- butions conceal a wide number of subject matters: common points of data structures, databases and information warehouses, info retrieval, multiagent structures and applied sciences, disbursed and parallel computing, evolutionary algorithms and procedure programming, and new info applied sciences in schooling. The good fortune of the convention used to be established upon the exertions of a giant variety of humans. We gratefully recognize the contributors of this system C- mittee who helped to coordinate the method of refereeing all submitted papers.

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Additional info for Advances in Information Systems: Second International Conference, ADVIS 2002 Izmir, Turkey, October 23–25, 2002 Proceedings

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Uk Abstract. Continual Queries (CQs) allow users to receive new information as it becomes available. CQ systems need to support a large number of CQs due to the scale of the Internet. One approach to this problem is to group CQs so that they share their computation on the assumption that many CQs have similar structure. Grouping queries optimizes the evaluation of the queries by executing common operations in the group of queries just once. However, traditional grouping techniques are not suitable for CQs because their grouping raises new issues.

Definition 2 (Query matching). e. is computed from) a group query G iff conditions 1-3 are satisfied. Partial Query Matching. Consider queries Q and G with predicates PQ = (x ≤ 4 ∧ y ≥ 7) and PG = (x ≤ 5 ∧ y > 9) and rQ = rG = r over the scheme PG . r = (x, y, z). The queries fulfill relation and attribute conditions but PQ → However, the predicates are obviously related in some way. Here, we define a new notion of partial matching in the interest of grouping scalability. 36 S. L. Mott Definition 3 (Partial query matching).

The Scheme Soundness Principle (SSP). All conceptual schemes are derivatives of the real world scheme. That is, in each conceptual scheme, every structural component is a view of the real world scheme. , there are no modelling errors, only modelling differences. To put it in yet a different way, all Representation of Temporal Unawareness 23 intentional inconsistencies among the independent conceptual schemes are reconcilable. œ The Instance Soundness Principle (ISP). All database-fact instances are derivatives of the real world instance.

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Advances in Information Systems: Second International Conference, ADVIS 2002 Izmir, Turkey, October 23–25, 2002 Proceedings by Johanna Wenny Rahayu, David Taniar (auth.), Tatyana Yakhno (eds.)

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