The VLDB Journal (2011) 20:641–642 DOI 10.1007/s00778-011-0250-x GUEST EDITORIAL Ralf Hartmut Güting · Nikos Mamoulis Published online: 9 August 2011 © Springer-Verlag 2011 Small, GPS-enabled and wireless networked mobile devices even consider the uncertainty of the tracked information (e.g., such as mobile phones, personal digital assistants, or car due to GPS errors or signal delays) in probabilistic query navigation systems have become powerful, affordable, and evaluation. wide-spread. Not only do these devices interact with the envi- This special issue presents six papers that are at the fore- ronment such as local services and facilities, searching for front of research on data management for mobile services. useful information, but they are also capable of collecting and The issue includes one paper on trajectory indexing, one transmitting position data. There is a need for addressing paper on mobile data tracking, one paper on mining a data- both aspects, of supporting online services by managing base of trajectories, and three papers on evaluating complex the locations of large sets of currently moving users, and queries over mobile object databases. of analyzing enormous volumes of captured trajectory data. The paper Indexing in-Network Trajectory Flows,by The latter may in particular be useful for improving
The VLDB Journal – Springer Journals
Published: Oct 1, 2011
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