AI 2012: Advances in Artificial Intelligence 25th Australasian J

This book constitutes the refereed proceedings of the 25th Australasian Joint Conference on Artificial Intelligence, AI 2012, held in Sydney, Australia, in December 2012. The 76 revised full papers presented were carefully reviewed and selected from 196 s

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

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Michael Thielscher Dongmo Zhang (Eds.)

AI 2012: Advances in Artificial Intelligence 25th Australasian Joint Conference Sydney, Australia, December 4-7, 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 Michael Thielscher University of New South Wales School of Computer Science and Engineering Sydney, NSW 2052, Australia E-mail: [email protected] Dongmo Zhang University of Western Sydney School of Computing and Mathematics Penrith South DC, NSW 1797, Australia E-mail: [email protected]

ISSN 0302-9743 e-ISSN 1611-3349 ISBN 978-3-642-35100-6 e-ISBN 978-3-642-35101-3 DOI 10.1007/978-3-642-35101-3 Springer Heidelberg Dordrecht London New York Library of Congress Control Number: 2012951926 CR Subject Classification (1998): I.2, H.3-4, F.1, H.2.8, I.4-5, J.3 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

Welcome to the proceedings of the 25th anniversary of the Australasian Joint Conferences on Artificial Intelligence (AI 2012)! Since its inauguration in Sydney in 1987, this annual conference has become the premier event for artificial intelligence researchers in Australasia and a major international forum on AI worldwide. For its silver anniversary, the conference returned to Australia’s iconic and most populous city in December 2012, jointly hosted by the University of Western Sydney and the University of New South Wales. AI 2012 received 196 submissions with authors from 32 countries. Each submission was reviewed by at least three Program Committee members or external referees. A lively and intense discussion ensued among the reviewers and the dedicated members of the senior Program Committee. After this thorough assessment and rigorous pre