Inteligencia Artificial. Revista Iberoamericana de Inteligencia Artificial ISSN: 1137-3601 [email protected] Asociación Española para la Inteligencia Artificial España García, Alejandro J.; Lanzarini, Laura; Leguizamón, Guillermo Guest Editorial XIII Workshop on Agents and Intelligent Systems Selected papers Inteligencia Artificial. Revista Iberoamericana de Inteligencia Artificial, vol. 16, núm. 52, 2013, pp. 1-2 Asociación Española para la Inteligencia Artificial Valencia, España

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Inteligencia Artificial 16(52) (2013), 1-2

INTELIGENCIA ARTIFICIAL http://journal.iberamia.org/

Guest Editorial XIII Workshop on Agents and Intelligent Systems Selected papers Alejandro J. Garc´ıa1 , Laura Lanzarini2 and Guillermo Leguizam´on3 1

Artificial Intelligence Research and Development Laboratory Department of Computer Science and Engineering Universidad Nacional del Sur - Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas Bah´ıa Blanca, Argentina E-mail: [email protected] 2

Instituto de Investigaci´ on en Inform´ atica LIDI (III-LIDI) School of Computer Science National University of La Plata La Plata, Buenos Aires, Argentina E-mail: [email protected] 3

LIDIC - Departament of Informatics National University of San Luis San Luis, SL, Argentina E-mail: [email protected]

This special issue contains five extended papers that were selected as the best articles from the XIII Workshop on Agents and Intelligent Systems. This workshop was held at Universidad Nacional del Sur, Bah´ıa Blanca, Argentina, between 9th and 11th November 2012. The Workshop on Agents and Intelligent Systems is held yearly as a joint event during the Argentine Congress on Computer Sciences, an Argentine Conference which has been held yearly from 1995. The selected papers included in this issue are: • Hybridization of Differential Evolution using Hill Climbing to solve Constrained Optimization Problems. Sebasti´ an Hern´ andez, Guillermo Leguizam´on and Efr´en Mezura-Montes. • Merging of Ontologies Using Belief Revision and Defeasible Logic Programming. Sergio Alejandro G´ omez and Guillermo Ricardo Simari. • A defeasible logic programming with extra meta-level information through labels. Maximiliano Celmo David Bud´ an, Mauro J G´ omez Lucero and Guillermo Ricardo Simari. • Assesing The Performance of Different S-Metaheuristics To Solve Unrestricted Parallel Identical Machines Scheduling Problem. Claudia Ruth Gatica, Susana Cecilia Esquivel, Mario Guillermo Leguizam´ on ISSN: 1988-3064(on-line) c

IBERAMIA and the authors

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Inteligencia Artificial 52(2013)

• An Approach to Argumentation Schemes that Appeal to Expert Opinion. Paola Daniela Bud´an, Maximiliano Celmo David Bud´ an and Guillermo Ricardo Simari. These articles were selected among other twenty-three papers that were accepted for the workshop presentation after a round of review. The selected papers were revised and extended by the authors and then they had a second phase of evaluation.

Acknowledgments We want to thank to the reviewers which made possible the evaluation and selection process. We also want to thank to the program committee of Congreso Argentino de Ciencias de la Computaci´on (CACiC 2012) and the staff of the Computer Science Department of Universidad Nacional del Sur for their support during the Workshop. Finally, we are grateful to “Revista Iberoamericana de Inteligencia Artificial” for publishing this special issue, and to Luis Paulo Reis and Ana Garcia Serrano for their support.