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SIGMOD
2009
ACM
258views Database» more  SIGMOD 2009»
16 years 6 months ago
Continuous obstructed nearest neighbor queries in spatial databases
In this paper, we study a novel form of continuous nearest neighbor queries in the presence of obstacles, namely continuous obstructed nearest neighbor (CONN) search. It considers...
Yunjun Gao, Baihua Zheng
SIGMOD
2008
ACM
206views Database» more  SIGMOD 2008»
16 years 6 months ago
Ad-hoc aggregations of ranked lists in the presence of hierarchies
A variety of web sites and web based services produce textual lists at varying time granularities ranked according to several criteria. For example, Google Trends produces lists o...
Nilesh Bansal, Sudipto Guha, Nick Koudas
PPOPP
2010
ACM
16 years 3 months ago
The LOFAR correlator: implementation and performance analysis
LOFAR is the first of a new generation of radio telescopes. Rather than using expensive dishes, it forms a distributed sensor network that combines the signals from many thousands...
John W. Romein, P. Chris Broekema, Jan David Mol, ...
ICDCS
2009
IEEE
16 years 3 months ago
Roadcast: A Popularity Aware Content Sharing Scheme in VANETs
Content sharing through vehicle-to-vehicle communication can help people find their interested content on the road. In VANETs, due to limited contact duration and unreliable wire...
Yang Zhang, Jing Zhao, Guohong Cao
HICSS
2010
IEEE
225views Biometrics» more  HICSS 2010»
16 years 1 months ago
A Comparative Analysis of Professional Forums in the United States Army and Hybrid Communities of Practice in the Civilian Secto
Communities of practice (COPs) have been around since the founding of the first social networks many millennia ago. Organizations around the world over the last two decades have l...
Jon Brickey, Steven Walczak