Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

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	2	Allan, J., Carbonell, J., Doddington, G., Yamron, J., and Yang, Y. (1998a). Topic detection and tracking pilot study: Final report. In Proceedings of DARPA Broadcast News Transcription and Under standing Workshop, pages 194-218.
	3	Allan, J., Jin, H., Rajman, M., Wayne, C., Gildea, D., Lavrenko, V., Hoberman, R., and Caputo, D. (1999b). Topic-based novelty detection: 1999 summer workshop at clsp, final report. Available at http://www.clsp.jhu.edu/ws99/tdt.
	4	Allan, J., Lavrenko, V., and Jin, H. (2000). Comparing effectiveness in TDT and IR. Technical Report IR-197, CIIR, Department of Computer Science, University of Massachusetts, Amherst.
	5	James Allan , Ron Papka , Victor Lavrenko, On-line new event detection and tracking, Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, p.37-45, August 24-28, 1998, Melbourne, Australia  [doi>10.1145/290941.290954]
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	7	DARPA (1997). Proceedings of the TDT workshop. University of Maryland, College Park, MD (unpublished).
	8	DARPA, editor (1999). Proceedings of the DARPA Broadcast news Workshop, Herndon, Virginia.
	9	Michael R. Garey , David S. Johnson, Computers and Intractability: A Guide to the Theory of NP-Completeness, W. H. Freeman & Co., New York, NY, 1979
	10	Martin, A., Doddington, G., Kamm, T., Ordowski, M., and ybocki, M. (1997). The DET curve in assessment of detection task performance. In Proceedings of EuroSpeech'97, pages 1895-1898.
	11	NIST (1999). 1999 topic detection and tracking evaluation project (TDT3). http://www.nist.gov/speech/tdt3/tdt3.htm.
	12	Ron Papka , James Allan , W. Bruce Croft, On-line new event detection, clustering, and tracking (information retrieval, internet), 1999
	13	Papka, R., Allan, J., and Lavrenko, V. (1999). UMass approaches to detection and tracking at TDT2. In Proceedings of the DARPA Broadcast News Workshop, pages 111-116.
	14	Gerard Salton , Michael J. McGill, Introduction to Modern Information Retrieval, McGraw-Hill, Inc., New York, NY, 1986
	15	Swets, J. (1988). Measuring the accuracy of diagnostic systems. Science, 240:1285-1293.
	16	C. J. Van Rijsbergen, Information Retrieval, Butterworth-Heinemann, Newton, MA, 1979
	17	Voorhees, E. and Harman, D. (1999). Overview of the seventh text retrieval conference (TREC-7). In The Seventh Text Retrieval Conference (TREC- 7), pages 1-24. NIST Special publication 500-242.
	18	Voorhees, E. and Harman, D. (2000). Overview of the eighth text retrieval conference (TREC-8). In The Eighth Text Retrieval Conference (TREC-8). NIST Special publication. Forthcoming.
	19	Yiming Yang , Tom Pierce , Jaime Carbonell, A study of retrospective and on-line event detection, Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, p.28-36, August 24-28, 1998, Melbourne, Australia  [doi>10.1145/290941.290953]

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