We propose a planning architecture where the planner and the executor interact with each other in order to face dynamic changes of the application domain. According to the deferred planning strategy proposed in [14], a plan schema is produced o -line by a generative constraint based planner and re ned at execution time by retrieving up-todate information when that available is no longer valid. ...

In this paper, we describe an approach to the representation, speciication and implementation of real-time systems. The approach is based on the notion of concurrent object-oriented systems where processes are represented as objects. In our approach, the behaviour of an object (its safety properties and time requirements) is declaratively stated as a set of temporal constraints among events whi...

This paper briefly describes some of the plan execution problems prevalent in the simulated battlefield domain and how they can be addressed. The system described uses generalised actions which are expanded to low level actions at the time they are executed, ensuring their relevance to the prevailing situation. The continuing value of plans is ensured by monitoring the assumptions and constrain...

Workflows are widely used in applications that require coordinated use of computational resources. Workflow definition languages typically abstract over some aspects of the way in which a workflow is to be executed, such as the level of parallelism to be used or the physical resources to be deployed. As a result, a workflow management system has responsibility for establishing how best to map t...

The paper motivates and describes an approach for executing determini-stic plans in incompletely observable environments under possible action faults. For the application at hand, the plans happen to be path plans, and the domain modeling formalism used for monitoring execution is Partially Observable Markov Decision Processes (POMDPs). It is part of the application requirements that the plans ...

If considering only sequential execution of plans, the execution time of a plan will increase if adding actions to it. However, if also considering parallel execution of plans, then the addition of actions to a plan may sometimes decrease the execution time. It is further shown that plans which are sub-optimal in this way are likely to be frequently generated by standard partial-order planners....

On the one hand side operational concepts enable the user to get information about what a robot has been done and on the other hand side, they enable the user to control the robot. In this way, they function as elements of a high level command language, easy to understand by human users. Operational concepts should be general enough to be applied in di erent but similar environments like o ce r...

each community , due to differences in climatical , social economical and cultural peculiarities has a different sort of public health problems . in planning and executing public health programs , health workers should first be concerned with the problems of the locality and then with the program.

Exact-String-Matching is an essential issue in many computer science applications. Unfortunately, the performance of Exact-String-Matching algorithms, namely, executing time, does not address the needs of these applications. This paper proposes a general platform for improving the existing ExactString-Matching algorithms executing time, called the PXSMAlg platform. The function of this platform...