Proceedings of the Seventh ACM International Workshop on Data Engineering for Wireless and Mobile Access

It is our great pleasure to welcome you all to the ACM International Workshop on Data Engineering for Wireless and Mobile Access (MobiDE'08), held in conjunction with SIGMOD 2008. MobiDE continues its tradition of bringing together researchers and practitioners in databases, mobile computing, and networking, and providing a full day of exciting presentations and discussions. As in previous years, the workshop will serve as a forum to present latest research and engineering results and contributions, and set future directions in wireless and mobile data management. MobiDE'08 is the seventh of a series of workshops that strives to bridge the data management and mobile computing communities. The first MobiDE workshop (MobiDE'99) took place in Seattle in August 1999, in conjunction with MobiCom 1999. The second MobiDE workshop (MobiDE'01) was held in conjunction with SIGMOD/PODS 2001 in Santa Barbara in May 2001. The third MobiDE workshop was held in conjunction with MobiCom 2003 in San Diego in September 2003. Since the fourth edition of the workshop, MobiDE has been held in conjunction with SIGMOD/PODS and has been taken place on an annual basis. In 2005, MobiDE was held in Baltimore, Maryland. In 2006, MobiDE was held in Chicago, Illinois. Finally, in 2007, MobiDE was held in Beijing, China, also in conjunction with SIGMOD/PODS 2007. The call for papers for MobiDE'08 attracted 31 high-quality submissions, making the selection process very competitive. All papers were reviewed by three members of the Program Committee. Eventually, 9 papers were selected, resulting in an acceptance rate of 29%. The final program covers a broad variety of topics, including querying and security in mobile systems and applications, caching and replication, location-based data management, wireless sensor networks, communication and pervasive systems. We believe that these proceedings will thus serve as a valuable reference point for the latest results on mobile and wireless data engineering. In addition, the workshop program includes a keynote speech by Prof. Vassilis Tsotras of the University of California, Riverside. Several people contributed to the successful organization of MobiDE08. We thank the authors for providing the content of the program. We owe our sincere gratitude to the members of the technical Program Committee and external reviewers for their excellent work in reviewing the papers and providing valuable feedback under a tight deadline. We also thank Microsoft for granting us permission to use the Microsoft CMT service and the entire CMT support team, for their help in setting up and managing the online review process. Our special thanks go to the publicity chair, Demetris Zeinalipour, from the School of Pure and Applied Sciences, Open University of Cyprus and our Steering Committee members Ugur Cetintemel, from Brown University, Panos K. Chrysanthis, from the University of Pittsburgh, Christian Jensen, from Aalborg University, Alexandros Labrinidis, from the University of Pittsburgh, Dik Lun LEE, from HKUST and George Samaras, from the University of Cyprus. We are also grateful to our industrial sponsors: IBM, Microsoft Research and Microsoft .NET club for the financial support they provided. Last, but definitely not least, we want to thank ACM and, in particular SIGMOD, for sponsoring the workshop and SIGMOBILE for supporting it (MobiDE08 is sponsored by ACM SIGMOD and held in-cooperation with ACM SIGMOBILE). We acknowledge the help of many people from these organizations. First of all, we would like to thank Marianne Winslett, the SIGMOD Vice Chair, whose constant help, support, and guidance throughout the entire process were crucial to the success of MobiDE08. Special thanks also go to Erin Dolan, Adrienne Gristi, and Maritza Nichols from the ACM Headquarters, to Yannis Ioannidis, the SIGMOD Workshops Coordinator, to Carson Leung, Local Workshop Chair for SIGMOD/PODS 2008, and to Jian Pei, the SIGMOD Finance Chair, for their invaluable help with the budget process. Finally, we would also like to thank Laks V.S. Lakshmanan and Raymond T. Ng, the Chairs of SIGMOD, and David B. Johnson, the Chair of SIGMOBILE, for their support and help in making the MobiDE08 organization a success.