We present a valid-time extension of SQL and investigate its efficient implementation on an Object-Relational database system. We propose an approach where temporal queries are ex...
This paper introduces HealthAgents, an EC-funded research project to improve the classification of brain tumours through multi-agent decision support over a distributed network o...
The needs for various forms of information systems relating to the European environment and ecosystem are reviewed, and limitations indicated.. Existing information systems are re...
Keith Rennolls, Tim Richards, Alexander M. Fedorec...
We extend the earlier results on the equivalence between the Boolean and the multivalued dependencies in relational databases and fragments of the Boolean propositional logic. It ...