949 search results - page 140 / 190 » Design and Implementation of Multi-scale Databases |
161
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
Abstract-- We present COLR-Tree, an abstraction layer designed to support efficient spatio-temporal queries on live data gathered from a large collection of sensors. We use COLR-Tr...
170
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
Network data models are frequently used as a mechanism to describe the connectivity between spatial features in many emerging GIS applications (location-based services, transporta...
160
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ICDE
2003
IEEE
15 years 11 months ago
2003
IEEE
Cryptographic file systems provide little protection against legal or illegal instruments that force the owner of data to release decryption keys for stored data once the presence ...
MOBISYS
2009
ACM
15 years 10 months ago
2009
ACM
In this work, we study the security of public WLAN-based positioning systems. Specifically, we investigate the Skyhook positioning system, available on PCs and used on a number of...
151
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VLDB
2007
ACM
15 years 10 months ago
2007
ACM
In large-scale distributed information systems, where participants are autonomous and have special interests for some queries, query allocation is a challenge. Much work in this c...