Changwen Yang Papers on DiSC'03 Effective collection metasearch in a hierarchical environment: global vs. localized retrieval performance Publications Note: Links lead to the DBLP on the Web. Changwen Yang 3 Jack G. Conrad , Changwen Yang, Joanne S. Claussen : Effective collection metasearch in a hierarchical environment: global vs. localized retrieval performance. SIGIR 2002 : 371-372 2 Shamin Alpha , Paul Dixon , Ciya Liao , Changwen Yang: Oracle at TREC 10: Filtering and Question-Answering. TREC 2001 1 Changwen Yang, Douglas D. O'Shaughnessy : Development of the INRS ATIS system. Intelligent User Interfaces 1993 : 133-140 DiSC'03 © 2003 Association for Computing Machinery