480 search results - page 4 / 96 » Spatial Index on Air |
MICCAI
2010
Springer
13 years 7 months ago
2010
Springer
Automatic segmentation of the esophagus from CT data is a challenging problem. Its wall consists of muscle tissue, which has low contrast in CT. Sometimes it is filled with air or...
SAC
2010
ACM
14 years 3 months ago
2010
ACM
Current methods of estimating air quality involve assigning a single value called the Air Quality Index (AQI) to a large land area for a 24-hour period based on a very few, sparse...
CORR
2010
Springer
13 years 8 months ago
2010
Springer
Sensor networks are currently an active research area mainly due to the potential of their applications. In this paper we investigate the use of Wireless Sensor Networks (WSN) for...
SIGMOD
1989
ACM
14 years 17 days ago
1989
ACM
Spatial objects other than points and boxes can be stored in spatial indexes, but the techniques usually require the use of approximations that can be arbitrarily bad. This leads ...
GISCIENCE
2004
Springer
14 years 1 months ago
2004
Springer
Abstract. The SPIRIT search engine provides a test bed for the development of web search technology that is specialised for access to geographical information. Major components inc...