BACKGROUND To compare computed tomography (CT) with co-registered positron emission tomography-computed tomography (PET-CT) as the basis for delineating gross tumor volume (GTV) in unresectable, locally advanced pancreatic carcinoma (LAPC). METHODS Fourteen patients with unresectable LAPC had both CT and PET images acquired. For each patient, two three-dimensional conformal plans were made us...

ALLONS-D is a decentralized real-time traac control scheme. A description of its basic architecture, system model, and optimization algorithm is given. Through simulations, the scheme is shown to be suitable for adaptive control of an isolated intersection. An eecient tree searching algorithm is used to nd a traac signal plan that minimizes delay. The search is constrained only by maximum and m...

This paper presents a procedure for standard application of hydrologic ⁄water quality models. To date, most hydrologic ⁄water quality modeling projects and studies have not utilized formal protocols, but rather have employed ad hoc approaches. The procedure proposed is an adaptation and extension of steps identified from relevant literature including guidance provided by the U.S. Environmental ...

Many practical planning problems necessitate the generation of a plan under incomplete information about the state of the world. In this paper we propose the notion of AssumptionBased Planning. Unlike conformant planning, which attempts to find a plan under all possible completions of the initial state, an assumption-based plan supports the assertion of additional assumptions about the state of...

Many practical planning problems necessitate the generation of a plan under incomplete information about the state of the world. In this paper we propose the notion of AssumptionBased Planning. Unlike conformant planning, which attempts to find a plan under all possible completions of the initial state, an assumption-based plan supports the assertion of additional assumptions about the state of...

Heuristic search planners are so far the most successful. Almost all use as their heuristic an estimate of the distance to a goal state. We formalize a logical measure of progress, defined as a predicate P (x̄, s) true of objects x̄ at a situation s. Actions which increase P ’s extension are guaranteed to move closer to a goal situation, so that P enables us to form plans without search. One exam...

The Agricultural Research and Extension Network is sponsored by the UK Department for International Development (DFID) The opinions expressed in this paper do not necessarily reflect those of DFID. We are happy for this material to be reproduced on a not-for-profit basis. The Network Coordinator would appreciate receiving details of any use of this material in training, research or programme de...

Multi-agent planning is a core issue in the multi-agent systems field. In this work we focus on the coordination of multiple agents in a setting where agents are able to achieve individual goals that may be either independent, or necessary for the achievement of a global common goal. The agents are able to generate individual plans in order to achieve their own goals, but, as they share the sam...

In many read-world planning domains, generating good plan quality is a central issue. This is especially true for problems with many solutions, or with many goals that cannot be achieved altogether. We propose an extension to the PDDL language that aims at a better characterization of plan quality by allowing the user to express strong and soft state constraints about the structure of the desir...