Active database systems enhance the functionality of traditional databases through the use of active rules or`triggers'. There is little consensus, though, on what components should be included in a rule system. In this paper, the expressive power of some simple active database rule systems is examined and the eeect of choosing diierent features studied. Four important parameters of variation a...

Recent advances in communication and information technology, such as the increasing accuracy of GPS technology and the miniaturization of wireless communication devices pave the road for Location– Based Services (LBS). To achieve high quality for such services, spatio– temporal data mining techniques are needed. In this paper, we describe experiences with spatio–temporal rule mining in a Danish...

This work presents unaddressed issues in the field of Association Rule Mining (ARM). Looking at the previous literature of varied areas and applications of ARM, we identify three broad categories of ARM where the research is still in the nascent stage. We review papers in the three categories of fuzzy association rules, multilevel association rules and negative association rules to study the st...

An investigation of rule learning processes that allow the inclusion of negated features is described. The objective is to establish whether the use of negation in inductive rule learning systems is effective with respect to classification. This paper seeks to answer this question by considering two issues relevant to such systems; feature identification and rule refinement. Both synthetic and ...

The year 1999 marks a remarkable turnaround in Nigeria’s history and bid for global reckoning as a democratic nation having grappled with a sustained military rule for many decades after her independence. However, with the country’s return to democratic rule, many teething problems evolved which of course is not strange to young and emerging democracies such as Nigeria’s particularly after many...

the rule of iḍṭirār (desperate necessity) indicates an order which ceases the previously issued orders on the condition of proving the needfulness and indigence of a convicted. rationally speaking, however, such an order is not far from flaws in an absolute term and this order to be carried out is bounded in time and quantity. although this is a principal rule of jurisprudence, it is neglected ...