Advances in Artificial Intelligence - SBIA 2012 21th Brazilian S

This book constitutes the refereed proceedings of the 21st Brazilian Symposium on Artificial Intelligence, SBIA 2012, held in Curitiba, Brazil, in October 2012. The 23 revised full papers presented were carefully reviewed and selected from 81 submissions.

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NAI Founding Series Editor Joerg Siekmann DFKI and Saarland University, Saarbrücken, Germany

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Leliane N. Barros Marcelo Finger Aurora T. R. Pozo Gustavo A. Gimenénez-Lugo Marcos Castilho (Eds.)

Advances in Artificial Intelligence SBIA 2012 21th Brazilian Symposium on Artificial Intelligence Curitiba, Brazil, October 20-25, 2012 Proceedings

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Series Editors Randy Goebel, University of Alberta, Edmonton, Canada Jörg Siekmann, University of Saarland, Saarbrücken, Germany Wolfgang Wahlster, DFKI and University of Saarland, Saarbrücken, Germany Volume Editors Leliane N. Barros Marcelo Finger University of São Paulo IME, Department of Computer Science, São Paulo, Brazil E-mail: {leliane, mfinger}@ime.usp.br Aurora T. R. Pozo Marcos Castilho Federal University of Paraná Department of Informatics, Curitiba, Brazil E-mail: [email protected] [email protected] Gustavo A. Gimenénez-Lugo Federal University of Technology, Paraná, Curitiba, Brazil E-mail: [email protected]

ISSN 0302-9743 e-ISSN 1611-3349 ISBN 978-3-642-34458-9 e-ISBN 978-3-642-34459-6 DOI 10.1007/978-3-642-34459-6 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2012949764 CR Subject Classification (1998): I.2, H.3, H.4, I.4, I.5, H.5 LNCS Sublibrary: SL 7 – Artificial Intelligence

© Springer-Verlag Berlin Heidelberg 2012 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)

Preface

After 16 years, the biannual Brazilian Symposium on Artificial Intelligence (SBIA) returned to Curitiba, Paran´ a, which also hosted its 13th edition in 1996. Already in its 21st edition, SBIA has been consolidated as the central event on artificial intelligence (AI) in Brazil and an important international forum for discussion of new ideas and current projects for researchers, students, and practitioners in all areas of AI. This edition was held jointly with sister events SBRN, ENIA, and CTDIA under the umbrella of the Brazilian Conference of Intelligent Systems (BRACIS 2012). These proceedings contain the 23 full papers selected for publication and oral