574 search results - page 47 / 115 » Distributed Queries and Query Optimization in Schema-Based P... |
126
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AMW
2010
15 years 3 months ago
2010
In this work we present in-network techniques to improve the efficiency of spatial aggregate queries. Such queries are very common in a sensornet setting, demanding more targeted t...
146
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GIS
2008
ACM
15 years 3 months ago
2008
ACM
In this paper we study in-network query processing in disconnected mobile environments, where both ad-hoc communication and infrastructure communication are available. Depending o...
118
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MDM
2005
Springer
15 years 7 months ago
2005
Springer
In this paper we propose a query-driven approach for tuning the time/energy trade-off in sensor networks with mobile sensors. The tuning factors include re-positioning of mobile s...
GEOINFORMATICA
2006
15 years 1 months ago
2006
Existing estimation approaches for spatial databases often rely on the assumption that data distribution in a small region is uniform, which seldom holds in practice. Moreover, the...
EUROPAR
2000
Springer
15 years 5 months ago
2000
Springer
Tertiary storage systems are used when secondary storage can not satisfy the data storage requirements and/or it is a more cost effective option. The new application domains requir...