Over the last fifteen years, database management systems (DBMSs) have been enhanced by the addition of rule-based programming to obtain active DBMSs. One of the greatest challeng...
Flat transactions with savepoints are a variation of the classical flat transactions that allows the user to go undo work done so far back to a certain point within the transacti...
We present a framework for automatically summarizing social group activity over time. The problem is important in understanding large scale online social networks, which have dive...