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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11733

Title: Trajectory databases: data models, uncertainty and complete query languages
Authors: KUIJPERS, Bart
OTHMAN, Walied
Issue Date: 2010
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation: JOURNAL OF COMPUTER AND SYSTEM SCIENCES, 76(7). p. 538-560
Abstract: Moving ob jects produce tra jectories. We describe a data model for tra jectories and tra jectory samples and an efficient way of modeling uncertainty via beads for tra jec- tory samples. We study transformations of the ambient space for which important physical properties of tra jectories, such as speed, are invariant. We also determine which transformations preserve beads. We give conceptually easy first-order com- plete query languages and computationally complete query languages for tra jectory databases, which allow to talk directly about speed and uncertainty in terms of beads. The queries expressible in these languages are invariant under speed- and bead-preserving transformations.
Notes: Affiliation: [Kuijpers, Bart] Hasselt Univ, Dept Math Phys & Comp Sci, B-3590 Diepenbeek, Belgium. [Kuijpers, Bart; Othman, Walied] Transnatl Univ Limburg, Limburg, Belgium.
URI: http://hdl.handle.net/1942/11733
DOI: 10.1016/j.jcss.2009.10.002
ISI #: 000278778500004
ISSN: 0022-0000
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

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