New representation results for three families of regular languages are stated, using a special kind of shuffle operation, namely the synchronized shuffle. First, it is proved that the family of regular star languages is the smallest family containing the language (a+ bc)∗ and closed under synchronized shuffle and length preserving morphism. The second representation result states that the famil...

Regular pattern mining on Incremental Databases is a novel approach in Data Mining Research. Recently closed item set mining has gained lot of consideration in mining process. In this paper we propose a new mining method called CRPMID (Closed-regular Pattern Mining on Incremental Databases) with sliding window technique using Vertical Data format. This method generates complete set of closed-re...