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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, reuse of illustrations, recitation, broadcasting,
reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication
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are liable for prosecution under the German Copyright Law.
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springer.com
© Springer-Verlag Berlin Heidelberg 2007
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: Integra Softw are Services Pvt. Ltd., India
Printed on acid-free paper
SPIN: 11672524
45/3100/Integra
Alberto Belussi
University of Verona
Department of Computer Science
Strada Le Grazie 15
37100 Verona
Italy
alberto.belussi@univr.it
University of L
, Aquila
Italy
Monteluco di Roio
67040 L
, Aquila
eliseo@ing.univaq.it
Eliseo Clementini
Department of Electrical Engineering
Barbara Catania
University of Genova
Department of Computer
and Information Sciences
Via Dodecaneso 35
16146 Genova
Italy
barbara.catania@unige.it
Elena Ferrari
University of Insubria
Via Mazzini 5
21100 Varese
Italy
elena.ferrari@uninsubria.it
5 4 3 2 1 0
2007920901
Cover design: KünkelLopka, Heidelberg
Editors
ACM Computing Classification (1998): H.2, H.3, J.2
ISBN 978-3-540-69877-7
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, reuse of illustrations, recitation, broadcasting,
reproduction on microfilm 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 for prosecution under the German Copyright Law.
Springer is a part of Springer Science+Business Media
springer.com
© Springer-Verlag Berlin Heidelberg 2007
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: Integra Softw are Services Pvt. Ltd., India
Printed on acid-free paper
SPIN: 11672524
45/3100/Integra
Alberto Belussi
University of Verona
Department of Computer Science
Strada Le Grazie 15
37100 Verona
Italy
alberto.belussi@univr.it
University of L
, Aquila
Italy
Monteluco di Roio
67040 L
, Aquila
eliseo@ing.univaq.it
Eliseo Clementini
Department of Electrical Engineering
Barbara Catania
University of Genova
Department of Computer
and Information Sciences
Via Dodecaneso 35
16146 Genova
Italy
barbara.catania@unige.it
Elena Ferrari
University of Insubria
Via Mazzini 5
21100 Varese
Italy
elena.ferrari@uninsubria.it
5 4 3 2 1 0
2007920901
Cover design: KünkelLopka, Heidelberg
Editors
ACM Computing Classification (1998): H.2, H.3, J.2
ISBN 978-3-540-69877-7