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ACM Transactions on Information Systems (TOIS), Volume 17 Issue 4, Oct. 1999

Integrating geometrical and linguistic analysis for email signature block parsing
Hao Chen, Jianying Hu, Richard W. Sproat
Pages: 343-366
DOI: 10.1145/326440.326442
The signature block is a common structured component found in email messages. Accurate identification and analysis of signature blocks is important in many multimedia messaging and information retrieval applications such as email text-to-speech...

PIC matrices: a computationally tractable class of probabilistic query operators
Warren R. Greiff, W. Bruce Croft, Howard Turtle
Pages: 367-405
DOI: 10.1145/326440.326444
The inference network model of information retrieval allows a probabilistic interpretation of query operators. In particular, Boolean query operators are conveniently modeled as link matrices of the Bayesian Network. Prior work has shown,...

Efficient passage ranking for document databases
Marcin Kaszkiel, Justin Zobel, Ron Sacks-Davis
Pages: 406-439
DOI: 10.1145/326440.326445
Queries to text collections are resolved by ranking the documents in the collection and returning the highest-scoring documents to the user. An alternative retrieval method is to rank passages, that is, short fragments of documents, a strategy...

The impact on retrieval effectiveness of skewed frequency distributions
Mark Sanderson, C. J. Van Rijsbergen
Pages: 440-465
DOI: 10.1145/326440.326447
We present an analysis of word senses that provides a fresh insight into the impact of word ambiguity on retrieval effectiveness with potential broader implications for other processes of information retrieval. Using a methodology of forming...