16404 search results - page 2490 / 3281 » A set coverage problem |
180
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EDBT
2009
ACM
16 years 2 months ago
2009
ACM
This work addresses the problem of processing continuous nearest neighbor (NN ) queries for moving objects trajectories when the exact position of a given object at a particular t...
197
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EDBT
2009
ACM
16 years 2 months ago
2009
ACM
We study the problem of estimating selectivity of approximate substring queries. Its importance in databases is ever increasing as more and more data are input by users and are in...
200
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EDBT
2009
ACM
16 years 2 months ago
2009
ACM
This paper introduces the problem of modeling urban transportation systems in a database where certain aspects of the data are probabilistic in nature. The transportation network ...
208
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ESORICS
2009
Springer
16 years 2 months ago
2009
Springer
Abstract. The ubiquity of smartphones and other location-aware handheld devices has resulted in a dramatic increase in popularity of locationbased services (LBS) tailored to user l...
182
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ICCSA
2009
Springer
16 years 2 months ago
2009
Springer
Data aggregation in Geographic Information Systems (GIS) is a desirable feature, spatial data are integrated in OLAP engines for this purpose. However, the development and operatio...