These proceedings contain the refereed papers and posters presented at the S- ond International Conference on the Theory of Information Retrieval (ICTIR 2009), held at Microsoft Research in Cambridge, UK, September 10-11, 2009. This biennial international conference provides an opportunity for the p- sentation of the latest work describing theoretical advances in the ?eld of inf- mation retrieval (IR). The ?rst ICTIR was held in Budapest in October 2007, organizedby Keith van Rijsbergen, Sa ndor Dominich, S andor Daran yi, and F- enc Kiss. ICTIR was brought about by the growing interest in...

John Mylopoulos has made ground-breaking contributions to three areas of computer science: arti?cial intelligence, information systems and software - gineering. His contributions have been celebrated on multiple occasions. First, Misha Missiko? organized a one-day symposium on conceptual modeling on June 17, 2003, inVelden, Austria, tocelebrateJohn's60thbirthday.Second, JohnTsotsos led the organization of a day of celebrations on June 27th, 2009 in Toronto, Canada, on the occasionof John's retirementfrom the Departmentof Computer Science of the University of Toronto. This book grew out of our...

Ubiquitous user modeling differs from generic user modeling by three additional concepts: ongoing modeling, ongoing sharing, and ongoing exploitation. Systems that share their user models will improve the coverage, the level of detail, and the reliability of the integrated user models and thus allow better functions of adaptation. Ubiquitous user modeling implies new challenges of interchangeability, scalability, scrutability, and privacy. This volume presents results of a series of workshops on the topic of Ubiquitous User Modeling since 2003 and additional workshops at various other...

The objective of this state-of-the-art survey is to give a coherent overview of the main topics and results achieved by the Network of Excellence REWERSE on 'Reasoning on the Web', funded by the European Commission and Switzerland within the '6th Framework Programme' (FP6), from 2004 to 2008. The material has been organized into eight chapters, each of which addresses one of the main topics of REWERSE: hybrid reasoning with rules and ontologies, lessons in versatility or how query languages adapt to the Web, evolution and reactivity in the Semantic Web, rule-based policy representations and...

ThepromiseoftheSemanticWeb, atits most expansive, is to allow knowledge to be freely accessed and exchanged by software. It is now recognized that if the SemanticWebis to containdeepknowledge, theneedfornewrepresentationand reasoning techniques is going to be critical. These techniques need to ?nd the righttrade-o?betweenexpressiveness, scalabilityandrobustnesstodealwiththe inherently incomplete, contradictory and uncertain nature of knowledge on the Web. The International Conference on Web Reasoning and Rule Systems (RR) was founded to address these needs and has grown into a major...

We would like to thank the authors, who submitted papers, and the program committees members, who did a great job of paper reviewing. We acknowledge the ADBIS 2009 Organizing and Steering Committees for their cooperation in organizing the workshop sessions. We hope that you ?nd the results presented here interesting and useful. September 2009 Janis Grundspenkis Yannis Manolopoulos Irena Mlynkova Mikolaj Morzy Martin Necasky Oksana Nikiforova Leonids Novickis Janis Osis Robert Wrembel Conference Organization Executive Committee General Chair JanisGrundspenkis(RigaTechnicalUniversity, Latvia)...

This book constitutes the refereed proceedings of the 13th International Symposium on Spatial and Temporal Databases, SSTD 2013, held in Munich, Germany, in August 2013. The 24 revised full papers presented were carefully reviewed and selected from 58 submissions. The papers are organized in topical sections on joins and algorithms; mining and discovery; indexing; trajectories and road network data; nearest neighbours queries; uncertainty; and demonstrations.

This book constitutes the refereed proceedings of the 12th IFIP WG 8.5 International Conference on Electronic Government, EGOV 2013, held in Koblenz, Germany, in September 2013. The 27 revised full papers presented were carefully reviewed and selected for inclusion in this volume. The papers have been organized in the following topical sections: research foundations; open government data and transparency; service design and improvement; adoption and service evaluation; and social media and social network analysis.

This book constitutes the thoroughly refereed proceedings of the 17th East-European Conference on Advances in Databases and Information Systems, ADBIS 2013, held in Genoa, Italy, in September 2013. The 26 revised full papers presented together with three invited papers were carefully selected and reviewed from 92 submissions. The papers are organized in topical sections on ontologies; indexing; data mining; OLAP; XML data processing; querying; similarity search; GPU; querying in parallel architectures; performance evaluation; distributed architectures.

This book constitutes the proceedings of the 12th IFIP TC 8 International Conference, CISIM 2013, held in Cracow, Poland, in September 2013. The 44 papers presented in this volume were carefully reviewed and selected from over 60 submissions. They are organized in topical sections on biometric and biomedical applications; p