Seung-Hoon Na

2025

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Optimizing Causality-Based Radiology Reporting withRetrieval-Augmented and Structured Reasoning Approaches forthe NTCIR-18 HIDDEN-RAD Task.
Ju-Min Cho|Ho-Jin Yi|Myung-Kyu Kim|Se-Jin Jeong|Seung-Hoon Na
Proceedings of the 18th NTCIR Conference on Evaluation of Information Access Technologies, NTCIR 2025, Tokyo, Japan, June 10-13, 2025

2018

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Verbosity normalized pseudo-relevance feedback in information retrieval.
Seung-Hoon Na|Kangil Kim
Information Processing and Management 2018 Volume 54 Issue 2

2015

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Two-Stage Document Length Normalization for Information Retrieval.
Seung-Hoon Na
ACM Transactions on Information Systems (TOIS) 2015 Volume 33 Issue 2

2013

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Probabilistic co-relevance for query-sensitive similarity measurement in information retrieval.
Seung-Hoon Na
Information Processing and Management 2013 Volume 49 Issue 2

2012

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Utilizing local evidence for blog feed search.
Yeha Lee|Seung-Hoon Na|Jong-Hyeok Lee
Discover Computing 2012 Volume 15 Issue 2
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IR-based k-Nearest Neighbor Approach for Identifying Abnormal Chat Users.
In-Su Kang|Chul-Kyu Kim|Shin Jae Kang|Seung-Hoon Na
CLEF 2012 Evaluation Labs and Workshop, Online Working Notes, Rome, Italy, September 17-20, 2012

2011

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Enriching document representation via translation for improved monolingual information retrieval.
Seung-Hoon Na|Hwee Tou Ng
Proceeding of the 34th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2011, Beijing, China, July 25-29, 2011

2010

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RankSVR: can preference data help regression?
Hwanjo Yu|Sungchul Kim|Seung-Hoon Na
Proceedings of the 19th ACM Conference on Information and Knowledge Management, CIKM 2010, Toronto, Ontario, Canada, October 26-30, 2010

2009

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On co-authorship for author disambiguation.
In-Su Kang|Seung-Hoon Na|Seungwoo Lee|Hanmin Jung|Pyung Kim|Won-Kyung Sung|Jong-Hyeok Lee
Information Processing and Management 2009 Volume 45 Issue 1
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An improved feedback approach using relevant local posts for blog feed retrieval.
Yeha Lee|Seung-Hoon Na|Jong-Hyeok Lee
Proceedings of the 18th ACM Conference on Information and Knowledge Management, CIKM 2009, Hong Kong, China, November 2-6, 2009
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Improving Opinion Retrieval Based on Query-Specific Sentiment Lexicon.
Seung-Hoon Na|Yeha Lee|Sang-Hyob Nam|Jong-Hyeok Lee
Advances in Information Retrieval, 31th European Conference on IR Research, ECIR 2009, Toulouse, France, April 6-9, 2009. Proceedings
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DiffPost: Filtering Non-relevant Content Based on Content Difference between Two Consecutive Blog Posts.
Sang-Hyob Nam|Seung-Hoon Na|Yeha Lee|Jong-Hyeok Lee
Advances in Information Retrieval, 31th European Conference on IR Research, ECIR 2009, Toulouse, France, April 6-9, 2009. Proceedings
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A 2-poisson model for probabilistic coreference of named entities for improved text retrieval.
Seung-Hoon Na|Hwee Tou Ng|Jaap Kamps|Hwee Tou Ng|Jaap Kamps
Proceedings of the 32nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2009, Boston, MA, USA, July 19-23, 2009

2008

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Completely-Arbitrary Passage Retrieval in Language Modeling Approach.
Seung-Hoon Na|In-Su Kang|Yeha Lee|Jong-Hyeok Lee
Information Retrieval Technology, 4th Asia Infomation Retrieval Symposium, AIRS 2008, Harbin, China, January 15-18, 2008, Revised Selected Papers
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Applying Completely-Arbitrary Passage for Pseudo-Relevance Feedback in Language Modeling Approach.
Seung-Hoon Na|In-Su Kang|Yeha Lee|Jong-Hyeok Lee
Information Retrieval Technology, 4th Asia Infomation Retrieval Symposium, AIRS 2008, Harbin, China, January 15-18, 2008, Revised Selected Papers
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Improving Term Frequency Normalization for Multi-topical Documents and Application to Language Modeling Approaches.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Advances in Information Retrieval , 30th European Conference on IR Research, ECIR 2008, Glasgow, UK, March 30-April 3, 2008. Proceedings
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Structural Re-ranking with Cluster-Based Retrieval.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Advances in Information Retrieval , 30th European Conference on IR Research, ECIR 2008, Glasgow, UK, March 30-April 3, 2008. Proceedings
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Revisit of Nearest Neighbor Test for Direct Evaluation of Inter-document Similarities.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Advances in Information Retrieval , 30th European Conference on IR Research, ECIR 2008, Glasgow, UK, March 30-April 3, 2008. Proceedings
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Query-Based Inter-document Similarity Using Probabilistic Co-relevance Model.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Advances in Information Retrieval , 30th European Conference on IR Research, ECIR 2008, Glasgow, UK, March 30-April 3, 2008. Proceedings
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Exploiting proximity feature in bigram language model for information retrieval.
Seung-Hoon Na|Jungi Kim|In-Su Kang|Jong-Hyeok Lee
Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, Singapore, July 20-24, 2008
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KLE at TREC 2008 Blog Track: Blog Post and Feed Retrieval.
Yeha Lee|Seung-Hoon Na|Jungi Kim|Sang-Hyob Nam|Hun-Young Jung|Jong-Hyeok Lee
Proceedings of The Seventeenth Text REtrieval Conference, TREC 2008, Gaithersburg, Maryland, USA, November 18-21, 2008

2007

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Parsimonious translation models for information retrieval.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Information Processing and Management 2007 Volume 43 Issue 1
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An empirical study of query expansion and cluster-based retrieval in language modeling approach.
Seung-Hoon Na|In-Su Kang|Ji-Eun Roh|Jong-Hyeok Lee
Information Processing and Management 2007 Volume 43 Issue 2
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Adaptive document clustering based on query-based similarity.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Information Processing and Management 2007 Volume 43 Issue 4
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Cluster-based patent retrieval.
In-Su Kang|Seung-Hoon Na|Jungi Kim|Jong-Hyeok Lee
Information Processing and Management 2007 Volume 43 Issue 5
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POSTECH at NTCIR-6 English Patent Retrieval Subtask.
Jungi Kim|Yeha Lee|Seung-Hoon Na|Jong-Hyeok Lee
Proceedings of the 6th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-6, National Center of Sciences, Tokyo, Japan, May 15-18, 2007
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POSTECH at NTCIR-6: Combining Evidences of Multiple Term Extractions for Mono-lingual and Cross-lingual Retrieval in Korean and Japanese.
Seung-Hoon Na|Jungi Kim|Yeha Lee|Jong-Hyeok Lee
Proceedings of the 6th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-6, National Center of Sciences, Tokyo, Japan, May 15-18, 2007

2006

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Collection-based compound noun segmentation for Korean information retrieval.
In-Su Kang|Seung-Hoon Na|Jong-Hyeok Lee
Discover Computing 2006 Volume 9 Issue 5

2005

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An Empirical Study of Query Expansion and Cluster-Based Retrieval in Language Modeling Approach.
Seung-Hoon Na|In-Su Kang|Ji-Eun Roh|Jong-Hyeok Lee
Information Retrieval Technology, Second Asia Information Retrieval Symposium, AIRS 2005, Jeju Island, Korea, October 13-15, 2005, Proceedings
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Effective Query Model Estimation Using Parsimonious Translation Model in Language Modeling Approach.
Seung-Hoon Na|In-Su Kang|Ji-Eun Roh|Jong-Hyeok Lee
Information Retrieval Technology, Second Asia Information Retrieval Symposium, AIRS 2005, Jeju Island, Korea, October 13-15, 2005, Proceedings
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POSTECH at NTCIR-5 Patent Retrieval: Smoothing Experiments in a Language Modeling Approach to Patent Retrieval.
In-Su Kang|Seung-Hoon Na|Jun-Ki Min|Jong-Hyeok Lee
Proceedings of the Fifth NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-5, National Center of Sciences, Tokyo, Japan, December 6-9, 2005
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POSTECH at NTCIR-5: Combining Evidences of Multiple Term Extractions for Mono-lingual and Cross-lingual Retrieval in Korean and Japanese.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Proceedings of the Fifth NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-5, National Center of Sciences, Tokyo, Japan, December 6-9, 2005

2004

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Estimation of Query Model from Parsimonious Translation Model.
Seung-Hoon Na|In-Su Kang|Sin-Jae Kang|Jong-Hyeok Lee
Information Retrieval Technology, Asia Information Retrieval Symposium, AIRS 2004, Beijing, China, October 18-20, 2004, Revised Selected Papers
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Query Model Estimations for Relevance Feedback in Language Modeling Approach.
Seung-Hoon Na|In-Su Kang|Kyong-Hi Moon|Jong-Hyeok Lee
Information Retrieval Technology, Asia Information Retrieval Symposium, AIRS 2004, Beijing, China, October 18-20, 2004, Revised Selected Papers
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Combination Approaches in Information Retrieval: Words vs. N-grams and Query Translation vs. Document Translation.
In-Su Kang|Seung-Hoon Na|Jong-Hyeok Lee
Proceedings of the Fourth NTCIR Workshop on Research in Information Access Technologies Information Retrieval, Question Answering and Summarization, NTCIR-4, National Center of Sciences, Tokyo, Japan, June 2-4, 2004
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POSTECH Question-Answering Experiments at NTCIR4-QAC.
Seung-Hoon Na|In-Su Kang|Jong-Hyeok Lee
Proceedings of the Fourth NTCIR Workshop on Research in Information Access Technologies Information Retrieval, Question Answering and Summarization, NTCIR-4, National Center of Sciences, Tokyo, Japan, June 2-4, 2004

2002

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Question Answering Approach Using a WordNet-based Answer Type Taxonomy.
Seung-Hoon Na|In-Su Kang|Sang-Yool Lee|Jong-Hyeok Lee
Proceedings of The Eleventh Text REtrieval Conference, TREC 2002, Gaithersburg, Maryland, USA, November 19-22, 2002