An active database system is a conventional database system extended with a facility for managing active rules (or triggers). Rules in active database systems can be very difficult to program, due to the unstructured and unpredictable nature of rule processing. In this paper, we propose a method of termination analysis of rules in an active database system based on Petri nets. We consider here ...

Several links exist between active and temporal databases. These are summarised by the observation that rules are triggered by a specified evolution of the database. In this paper, we discuss the relation between active and temporal database using DEGAS, an object-based active database programming language. To achieve full active database functionality, a DEGAS object records its complete histo...

Active Appearance Models (AAMs) are able to align efficiently known faces under duress, when face pose and illumination are controlled. We propose Adapted Active Appearance Models to align unknown faces in unknown poses and illuminations. Our proposal is based on the one hand on a specific transformation of the active model texture in an oriented map, which changes the AAM normalization process...

We present a highly distributed management architecture dedicated to IP multicast services. This architecture relies on a three level hierarchical model over which both management data and functions are distributed. We show how the architecture can be used to support an extended multicast accounting algorithm which adapts itself to the dynamics of a multicast tree and detail the implementation ...

This paper describes a model for developing applications of active object-oriented databases based on three orthogonal concepts; methods, guards and actions and a tool which implements these ideas called MGA. MGA objects are active; they have guards which constrain the object's state, actions which maintain database integrity when the object's state changes and methods through which the object ...