574 search results - page 47 / 115 » Distributed Queries and Query Optimization in Schema-Based P... |
AMW
2010
13 years 10 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...
GIS
2008
ACM
13 years 10 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...
MDM
2005
Springer
14 years 2 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
13 years 9 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
14 years 18 days 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...