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Beitzel, Steven M., Jensen, Eric C., Chowdhury, Abdur and Frieder, Ophir (2007): Varying approaches to topical web query classification. In: Proceedings of the 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2007. pp. 783-784. Available online
Nguyen, Linh Thai, Jia, Dongmei, Yee, Wai Gen and Frieder, Ophir (2007): An analysis of peer-to-peer file-sharing system queries. In: Proceedings of the 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2007. pp. 855-856. Available online
Beitzel, Steven M., Jensen, Eric C., Lewis, David D., Chowdhury, Abdur and Frieder, Ophir (2007): Automatic classification of Web queries using very large unlabeled query logs. In ACM Transactions on Information Systems, 25 (2) p. 9
Argamon, S., Agam, G., Frieder, Ophir, Grossman, D., Lewis, D., Sohn, G. and Voorhees, K. (2006): A complex document information processing prototype. In: Proceedings of the 29th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2006. pp. 599-600. Available online
Lewis, D., Agam, G., Argamon, S., Frieder, Ophir, Grossman, D. and Heard, J. (2006): Building a test collection for complex document information processing. In: Proceedings of the 29th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2006. pp. 665-666. Available online
Stein, Sterling Stuart, Argamon, Shlomo and Frieder, Ophir (2006): The effect of OCR errors on stylistic text classification. In: Proceedings of the 29th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2006. pp. 701-702. Available online
Beitzel, Steven M., Jensen, Eric C., Frieder, Ophir, Grossman, David A., Lewis, David D., Chowdhury, Abdur and Kolcz, Aleksandr (2005): Automatic web query classification using labeled and unlabeled training data. In: Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2005. pp. 581-582. Available online
Beitzel, Steven M., Jensen, Eric C., Frieder, Ophir, Chowdhury, Abdur and Pass, Greg (2005): Surrogate scoring for improved metasearch precision. In: Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2005. pp. 583-584. Available online
Jensen, Eric C., Beitzel, Steven M., Grossman, David A., Frieder, Ophir and Chowdhury, Abdur (2005): Predicting query difficulty on the web by learning visual clues. In: Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2005. pp. 615-616. Available online
Beitzel, Steven M., Jensen, Eric C., Chowdhury, Abdur, Grossman, David A. and Frieder, Ophir (2004): Hourly analysis of a very large topically categorized web query log. In: Proceedings of the 27th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2004. pp. 321-328. Available online
Beitzel, Steven M., Jensen, Eric C., Chowdhury, Abdur, Grossman, David A. and Frieder, Ophir (2004): Evaluation of filtering current news search results. In: Proceedings of the 27th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2004. pp. 494-495. Available online
Beitzel, Steven M., Jensen, Eric C., Chowdhury, Abdur, Grossman, David A. and Frieder, Ophir (2003): Using manually-built web directories for automatic evaluation of known-item retrieval. In: Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2003. pp. 373-374. Available online
Agun, S. Kagan and Frieder, Ophir (2003): HAT: a hardware assisted TOP-DOC inverted index component. In: Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2003. pp. 447-448. Available online
Chowdhury, Abdur, Frieder, Ophir, Grossman, David A. and McCabe, Mary Catherine (2002): Collection statistics for fast duplicate document detection. In ACM Transactions on Information Systems, 20 (2) pp. 171-191191
Chowdhury, Abdur, McCabe, M. Catherine, Grossman, David A. and Frieder, Ophir (2002): Document normalization revisited. In: Proceedings of the 25th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2002. pp. 381-382. Available online
Chowdhury, Abdur, Frieder, Ophir, Grossman, David A. and McCabe, Catherine (2001): Analyses of multiple-evidence combinations for retrieval strategies. In: Proceedings of the 24th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2001. pp. 394-395. Available online
Goda, K., Tamura, T., Kitsuregawa, M., Chowdhury, A. and Frieder, Ophir (2001): Query optimization for vector space problems. In: Proceedings of the 24th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2001. pp. 416-417. Available online
McCabe, M. Catherine, Lee, Jinho, Chowdhury, Abdur, Grossman, David A. and Frieder, Ophir (2000): On the Design and Evaluation of a Multi-Dimensional Approach to Information Retrieval. In: Proceedings of the 23rd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 2000. pp. 363-365. Available online
Grossman, David A. and Frieder, Ophir (1998): Information Retrieval: Algorithms and Heuristics. Kluwer Academic Publishers
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Frieder, Ophir and Siegelmann, Hava Tova (1991): On the Allocation of Documents in Multiprocessor Information Retrieval Systems. In: Proceedings of the Fourteenth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval 1991. pp. 230-239. Available online
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