Groupware: Design, Implementation, and Use 15th International Worksh

This book constitutes the refereed post-conference proceedings of the 15th International Workshop on Groupware: Design, Implementation, and Use, held in Peso da Régua, Douro, Portugal, during September 13-17, 2009. The 30 papers presented were carefully r

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Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Alfred Kobsa University of California, Irvine, CA, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Microsoft Research, Cambridge, MA, USA Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany

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Luís Carriço Nelson Baloian Benjamim Fonseca (Eds.)

Groupware: Design, Implementation, and Use 15th International Workshop, CRIWG 2009 Peso da Régua, Douro, Portugal September 13-17, 2009 Proceedings

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Volume Editors Luís Carriço University of Lisbon, Faculty of Sciences Department of Informatics, Campo Grande Edifício C6, Piso 3, Sala 6.3.25, 1749-016 Lisboa, Portugal E-mail: [email protected] Nelson Baloian University of Chile, Blanco Encalada 2120, Santiago, Chile E-mail: [email protected] Benjamim Fonseca University of Trás-os-Montes e Alto Douro School of Science and Technology, Engineering Department Apartado 1013, 5001-801 Vila Real, Portugal E-mail: [email protected]

Library of Congress Control Number: 2009933476 CR Subject Classification (1998): H.5, K.3, K.4, C.2.4, H.5.3, K.4.3 LNCS Sublibrary: SL 3 – Information Systems and Application, incl. Internet/Web and HCI ISSN ISBN-10 ISBN-13

0302-9743 3-642-04215-5 Springer Berlin Heidelberg New York 978-3-642-04215-7 Springer Berlin Heidelberg New York

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. springer.com © Springer-Verlag Berlin Heidelberg 2009 Printed in Germany Typesetting: Camera-ready by author, data conversion by Scientific Publishing Services, Chennai, India Printed on acid-free paper SPIN: 12749676 06/3180 543210

Preface

This volume presents the proceedings of the 15th International Workshop of Groupware (CRIWG 2009). The conference was previously held in USA, (Omaha) in 2008, Argentina (Bariloche) in 2007, Spain (Medina del Campo) in 2006, Brazil (Porto de Galinhas) in 2005, Costa Rica (San Carlos) in 2004, France (Autrans) in 2003, Chile (La Serena) in 2002, Germany (Darmstadt)