13 research outputs found
A flexible coupling approach to multi-agent planning under incomplete information
The final publication is available at Springer via http://dx.doi.org/10.1007/s10115-012-0569-7Multi-agent planning (MAP) approaches are typically oriented at solving loosely
coupled problems, being ineffective to deal with more complex, strongly related problems.
In most cases, agents work under complete information, building complete knowledge
bases. The present article introduces a general-purpose MAP framework designed to tackle
problems of any coupling levels under incomplete information. Agents in our MAP model
are partially unaware of the information managed by the rest of agents and share only the critical
information that affects other agents, thus maintaining a distributed vision of the task.
Agents solve MAP tasks through the adoption of an iterative refinement planning procedure
that uses single-agent planning technology. In particular, agents will devise refinements
through the partial-order planning paradigm, a flexible framework to build refinement plans
leaving unsolved details that will be gradually completed by means of new refinements. Our
proposal is supported with the implementation of a fully operative MAP system and we show
various experiments when running our system over different types of MAP problems, from
the most strongly related to the most loosely coupled.This work has been partly supported by the Spanish MICINN under projects Consolider Ingenio 2010 CSD2007-00022 and TIN2011-27652-C03-01, and the Valencian Prometeo project 2008/051.Torreño Lerma, A.; Onaindia De La Rivaherrera, E.; Sapena Vercher, O. (2014). A flexible coupling approach to multi-agent planning under incomplete information. Knowledge and Information Systems. 38:141-178. https://doi.org/10.1007/s10115-012-0569-7S14117838Argente E, Botti V, Carrascosa C, Giret A, Julian V, Rebollo M (2011) An abstract architecture for virtual organizations: the THOMAS approach. Knowl Inf Syst 29(2):379–403Barrett A, Weld DS (1994) Partial-order planning: evaluating possible efficiency gains. Artif Intell 67(1):71–112Belesiotis A, Rovatsos M, Rahwan I (2010) Agreeing on plans through iterated disputes. 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A novel fibroblast growth factor receptor 2 (FGFR2) mutation associated to a mild Crouzon Syndrome
A novel Fibroblast Growth Factor Receptor 2 (FGFR2) mutation associated with a mild Crouzon syndrome
[No abstract available
[Cholecystosis: anatomo-clinical profile and therapeutic considerations].
In the last 5 years 16 patients with cholecystosis were observed. In this period the most recent diagnostic and therapeutic techniques were used including ultrasound which allowed to diagnose 60% of adenomyomatosis, 33.3% of cholecystosis and 6.7% of gallbladder polyposis. In 6 cases a traditional open surgery cholecystectomy was performed, while the videolaparascopic approach was used in other 6 cases. Histologic examination always confirmed the preoperative diagnosis, however in one case a gallbladder cancer was histologically found; this case had been clinically diagnosed 9 years previously as adenomyomatosis. Therefore, our experience suggest, in agreement with others, that cholecystosis should be considered as a precancerous lesion