122 search results - page 17 / 25 » Spatial Joins and R-trees |
ICMCS
2008
IEEE
2008
IEEE
Framework for virtual collaboration emphasized by awareness information and asynchronous interaction
14 years 2 months ago
In this paper, we propose a framework which allows remote users to form conversation groups based on spatial relationship in a shared virtual space. Our proposed framework can tra...
ICDE
2003
IEEE
14 years 9 months ago
2003
IEEE
We are witnessing in recent years growing interest for location-dependent information services among mobile users. This paper examines the issue of processing locationdependent qu...
GIS
2005
ACM
14 years 8 months ago
2005
ACM
Group nearest neighbor (GNN) queries are a relatively new type of operations in spatial database applications. Different from a traditional kNN query which specifies a single quer...
VTC
2007
IEEE
14 years 1 months ago
2007
IEEE
—We present a cooperative spatial reuse (CSR) scheme as a cooperative extension of the current TDMAbased MAC to enable spatial reuse in multi-rate wireless networks. We model spa...
KDD
2004
ACM
14 years 1 months ago
2004
ACM
Spatial collocation patterns associate the co-existence of nonspatial features in a spatial neighborhood. An example of such a pattern can associate contaminated water reservoirs ...