Sciweavers

3841 search results - page 706 / 769
» Crowdsourcing for search evaluation
Sort
View
SIGMOD
2006
ACM
171views Database» more  SIGMOD 2006»
14 years 10 months ago
Communication-efficient distributed monitoring of thresholded counts
Monitoring is an issue of primary concern in current and next generation networked systems. For example, the objective of sensor networks is to monitor their surroundings for a va...
Ram Keralapura, Graham Cormode, Jeyashankher Ramam...
SIGMOD
2004
ACM
126views Database» more  SIGMOD 2004»
14 years 10 months ago
Indexing Spatio-Temporal Trajectories with Chebyshev Polynomials
In this paper, we attempt to approximate and index a ddimensional (d 1) spatio-temporal trajectory with a low order continuous polynomial. There are many possible ways to choose ...
Yuhan Cai, Raymond T. Ng
SIGMOD
2004
ACM
150views Database» more  SIGMOD 2004»
14 years 10 months ago
When one Sample is not Enough: Improving Text Database Selection Using Shrinkage
Database selection is an important step when searching over large numbers of distributed text databases. The database selection task relies on statistical summaries of the databas...
Panagiotis G. Ipeirotis, Luis Gravano
EDBT
2004
ACM
147views Database» more  EDBT 2004»
14 years 10 months ago
Projection Pushing Revisited
The join operation, which combines tuples from multiple relations, is the most fundamental and, typically, the most expensive operation in database queries. The standard approach t...
Benjamin J. McMahan, Guoqiang Pan, Patrick Porter,...
PERCOM
2006
ACM
14 years 9 months ago
Decorrelating wireless sensor network traffic to inhibit traffic analysis attacks
Typical packet traffic in a sensor network reveals pronouncedpatterns that allow an adversary analyzing packet traffic to deduce the location of a base station. Once discovered, t...
Jing Deng, Richard Han, Shivakant Mishra