The concept of transactions is not only indispensable in database applications, but also useful in building robust software for mission-critical applications. This paper presents an implementation of the Object Transaction Service (OTS) based on CORBA specification. Transactional applications developed with the support of our OTS implementation are able to assure the ACID properties even in the...

A constellation of observation satellites allows to cover a large Earth surface, with a good revisit frequency, ensuring different kinds of pictures and the robustness of the system. Planning a mission for a constellation is a complex task: a lot of parameters and constraints, often contradictory, must be taken into account. This huge number of entities make this problem highly combinatorial. N...

A number of strategies exist for the recovery from execution-time plan failures. One manner in which these strategies difFer is the degree of dependence on the reliability and availability of the planner’s knowledge. The best strategy, however, may be dependent on a number of considerations, including the type of plan failure, the criticality of the failure, the availability of resources, and t...