Efficient processing of aggregation queries in sensor networks (2006)
Hyun, Dongjoon, Park, No Joon, Son, Jin Hyun, Kim, Myoung Ho
In the data warehouse environment, the concept of a materialized view is common and important for efficient support of OLAP query processing. Materialized views are generally derived from several...
A Query-Based Routing Tree in Sensor Networks (2006)
Song, In Chul, Roh, Yohan, Hyun, Dongjoon, Kim, Myoung Ho
In sensor networks, energy efficiency has been a primary concern because most sensor nodes have limited power. A well-known technique to reduce energy consumption is in-network processing, which...
Efficient Algorithms for Constructing Decision Trees with Constraints (2000)
Dongjoon Hyun, Rajeev Rastogi, Kyuseok Shim
Classification is an important problem in data mining. A number of popular classifiers construct decision trees to generate class models. Frequently, however, the constructed trees are complex with...