31 search results - page 1 / 7 » Efficient processing of past-future spatiotemporal queries |
SAC
2006
ACM
13 years 10 months ago
2006
ACM
Tutorial
The wide spread use of cellular phones, handheld devices, and GPS-like technology enables location-aware environments where virtually all objects are aware of their locations. Loca...
GIS
1999
ACM
13 years 9 months ago
1999
ACM
: The paper is concerned with the effective and efficient processing of spatiotemporal selection queries under varying degrees of approximation. Such queries may employ operators l...
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
This paper introduces the Scalable INcremental hash-based Algorithm (SINA, for short); a new algorithm for evaluating a set of concurrent continuous spatio-temporal queries. SINA ...
SIGMOD
2002
ACM
14 years 5 months ago
2002
ACM
Time-parameterized queries (TP queries for short) retrieve (i) the actual result at the time that the query is issued, (ii) the validity period of the result given the current mot...