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Ko, Youngjoong

Publications

Natural Language Processing/Dialogue System
Text Classification/Summarization
Information Retrieval/Cross-language IR
Opinion Mining
Big Data/Topic Modeling/Deep Learning/Machine Learning
Other Topics (Mobile, Bio etc.)

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Refereed International Journal Papers


45.Hongyeon Yu, Jaehyun An, Jeongmin Yoon, Hyemin Kim and Youngjoong Ko. Simple Methods to Overcome the Limitations of General Word Representations in Natural Language Processing Tasks. Computer Speech and Language, Elsevier Science, Vol. 59, pp. 91-113, January 2020. (SCIE, ISSN 0885-2308) [PDF] [Publisher]
44.Hongseon Yeom, Youngjoong Ko and Jungyun Seo. Unsupervised-learning Based Keyphrase Extraction from a Single Document by the Effective Combination of the Graph-based Model and the Modified C-value Method. Computer Speech and Language, Elsevier Science, Vol. 58, pp. 304-318, November 2019. (SCIE, ISSN 0885-2308) [PDF] [Publisher]
43.Kyoungman Bae and Youngjoong Ko. Efficient question classification and retrieval using the category information and word embedding on cQA services. Journal of Intelligent Information Systems, Springer, Vol. 53, No. 1, pp. 27-49, August 2019. (SCIE, ISSN 0925-9902) [PDF] [Publisher]
42.Kyoungman Bae and Youngjoong Ko. Improving Question Retrieval in Community Question Answering Service using Dependency Relations and Question Classification. Journal of the Association for Information Science and Technology, Wiley-Blackwell, March 2019. (online publication) (SSCI, SCIE, ISSN 2330-1635) [PDF] [Publisher]
41.Juae Kim, Youngjoong Ko and Jungyun Seo. A Bootstrapping Approach with CRF and Deep Learning Models for Improving the Biomedical Named Entity Recognition in Multi-domains. IEEE Access Vol. 7, pp. 70308-70318, June 2019. (SCIE, ISSN 2169-3536) [PDF] [Publisher]
40.Hyemin Kim, Seon Yang and Youngjoong Ko. How to utilize syllable distribution patterns as the input of LSTM for Korean morphological analysis. Pattern Recognition Letters, Elsevier Science, Vol. 120, pp. 39-45, April 2019. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
39.Sunjae Kwon, Youngjoong Ko and Jungyun Seo. Effective vector representation for the Korean named-entity recognition. Pattern Recognition Letters, Elsevier Science, Vol. 117, pp. 52-57, January 2019. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
38.Kyoungman Bae and Youngjoong Ko. Speech-Act Classification Using Convolutional Neural Networks and Word Embedding. International Journal on Artificial Intelligence Tools, Vol. 27, No. 6, 1850026, September 2018. (SCIE, ISSN 0218-2130) [PDF] [Publisher]
37. Hyoungil Jeong, Youngjoong Ko and Jungyun Seo. Statistical Text Summarization Using a Category-based Language Model on a Bootstrapping Framework. International Journal on Artificial Intelligence Tools, Vol. 27, No. 3, 1850014, May 2018. (SCIE, ISSN 0218-2130) [PDF] [Publisher]
36.Changsu Lee and Youngjoong Ko. Spoken Language Understanding with a Novel Simultaneous Recognition Technique for the Intelligent Personal Assistant Software. International Journal on Artificial Intelligence Tools, Vol. 27, No. 3, 1850009, May 2018. (SCIE, ISSN 0218-2130) [PDF] [Publisher]
35.Donghyun Yoo, Youngjoong Ko and Jungyun Seo. Speech-Act Classification Using a Convolutional Neural Network Based on POS tag and Dependency-Relation Bigram Embedding. IEICE Transactions on Information and System, Vol. E100-D, No. 12, pp. 3081-3084, December 2017. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
34.Youngjoong Ko. How to Use Negative Class Information for Naive Bayes Classification. Information Processing and Management, Pergamon-Elsevier Science, Vol. 53, No. 6, pp. 1255-1268, November 2017 (SSCI, SCIE, ISSN 0306-4573) [PDF] [Publisher]
33.Kyoungman Bae and Youngjoong Ko. Improving Question Retrieval in cQA Services Using a Dependency Parser. IEICE Transactions on Information and System, Vol. E100-D, No. 2, pp. 807-810, April 2017. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
32.Juryong Cheon and Youngjoong Ko. Automatically Extracting Parallel Sentences from Wikipedia Using Sequential Matching of Language Resources. IEICE Transactions on Information and System, Vol. E100-D, No. 2, pp. 405-408, February 2017. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
31.Hyoungil Jeong, Youngjoong Ko and Jungyun Seo. How to Improve Text Summarization and Classification by Mutual Cooperation on an Integrated Framework. Expert Systems with Applications, Vol. 60, pp. 222-233, October 2016. (SCIE, ISSN 0957-4174) [PDF] [Publisher]
30.Kyoungman Bae and Youngjoong Ko. How to Combine Translation Probabilities and Question Expansion for Question Classification in cQA Services. IEICE Transactions on Information and System, Vol. E99-D, No. 4, pp. 1019-1022, April 2016. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
29.Youngjoong Ko. A New Term Weighting Scheme for Text Classification Using the Odds of Positive and Negative Class Probabilities. Journal of the Association for Information Science and Technology, Wiley-Blackwell, Vol. 66, No. 12, pp. 2553-2565, December 2015. (SSCI, SCIE, ISSN 2330-1635) [PDF] [Publisher]
28.Hyoungil Jeong, Youngjoong Ko and Jungyun Seo. Efficient Keyword Extraction and Text Summarization for Reading Articles on a Smart Phone. Computing and Informatics, Vol. 34, No. 4, pp. 779-794, August 2015. (SCIE, ISSN 1335-9150) [preprint:PDF]
27.Youngjoong Ko. New Feature Weighting Approaches for Speech-act Classification. Pattern Recognition Letters, Elsevier Science, Vol. 51, pp. 107-111, January 2015. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
26.Sungho Kim, Youngjoong Ko and Douglas W. Oard. Combining Lexical and Statistical Translation Evidence for Cross-Language Information Retrieval. Journal of the Association for Information Science and Technology, Wiley-Blackwell, Vol. 66, No. 1, pp. 23-39, January 2015. (SSCI, SCIE, ISSN 2330-1635) [PDF] [Publisher]
25.Seon Yang and Youngjoong Ko. Mathematical Formula Search using Natural Language Queries. Advances in Electrical and Computer Engineering, Vol. 14, No. 4, pp. 99-104, December 2014. (SCIE, ISSN 1582-7445) [PDF][Publisher]
24.Seon Yang and Youngjoong Ko. Classifying Korean Comparative Sentences for Comparison Analysis. Natural Language Engineering, Cambridge Journals, Vol. 20, No. 4, pp. 557-581, October 2014. (SSCI, SCIE, ISSN 1351-3249) [PDF] [Publisher]
23.Youngjoong Ko. Sentiment Document Classification Using Global and Domain Features. Information: An International Interdisciplinary Journal, International Information Institute, Vol. 17, No. 2, pp. 699-708, February 2014. (SCOPUS, ISSN 1343-4500) [PDF]
22.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. Hierarchical Speech-act Classification for Discourse Analysis. Pattern Recognition Letters, Elsevier Science, Vol. 34, No. 10, pp. 1119-1124, July 2013. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
21.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. A Dialogue Management System Using a Corpus-based Framework and the Dynamic Dialogue Transition Model. AI Communications, IOS press, Vol. 26, No. 2, pp. 145-159, April 2013. (SCIE, ISSN 0921-7126) [PDF] [Publisher]
20.Youngjoong Ko and Sangjun Bae. Automatic Named-Entity Set Expansion from the Web Using a Mutual Importance Measure. Information: An International Interdisciplinary Journal, International Information Institute, Vol. 15, No, 11(B), pp. 5029-5040, November 2012. (SCIE, ISSN 1343-4500) [PDF]
19.Kyungsun Kim, Youngjoong Ko and Jungyun Seo. An Effective Application of Contextual Information using Adjacency Pairs and a Discourse Stack for Speech-Act Classification. International Journal of Innovative Computing Information and Control (IJICIC), Vol. 8, No. 11, pp. 7713-7728, November 2012. (SCIE, ISSN 1349-4198) [PDF] [Publisher]
18.Shinil Kim, Seon Yang and Youngjoong Ko. Classifying Mathematical Expressions Written in MathML. IEICE Transactions on Information and System, Vol. E95-D,No. 10, pp. 2560-2563, October 2012. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
17.Shinil Kim, Seon Yang and Youngjoong Ko. A Novel Discriminative Probabilistic Model for Automatic Word Spacing on Mobile Devices. International Journal of Innovative Computing Information and Control (IJICIC), Vol. 8, No. 7(B), pp. 5055-5065, July 2012. (SCIE, ISSN 1349-4198) [PDF] [Publisher]
16.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. Generating Effective Responses for a Plan-based Dialogue System in Human-robot Interaction. Information: An International Interdisciplinary Journal, International Information Institute, Vol. 15, No. 2, pp. 949-960, February 2012. (SCIE, ISSN 1343-4500) [PDF]
15.Youngjoong Ko and Jungyun Seo. Issues and Empirical Results for Improving Text Classification. Journal of Computing Science and Engineering (JCSE), Vol. 5, No. 2, pp. 150-160, June 2011. (SCOPUS, ISSN 1976-4677) [PDF] [Publisher]
14.Seon Yang and Youngjoong Ko. Finding Relevant Features for Korean Comparative Sentence Extraction. Pattern Recognition Letters, Elsevier Science, Vol. 32, No. 2, pp. 293-296, January 2011. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
13.Youngjoong Ko and Jungyun Seo. Text Classification from Unlabeled Documents with Bootstrapping and Feature Projection Techniques. Information Processing and Management, Pergamon-Elsevier Science, Vol. 45, No. 1, pp. 70-83, January 2009. (SSCI, SCIE, ISSN 0306-4573) [PDF] [Publisher]
12.Youngjoong Ko, Hongkuk An and Jungyun Seo. Pseudo-Relevance Feedback and Statistical Query Expansion for Web Snippet Generation. Information Processing Letters, Elsevier Science, Vol. 109, No. 1, pp. 18-22, December 2008. (SCIE, ISSN 0020-0190) [PDF] [Publisher]
11.Youngjoong Ko and Jungyun Seo. An Effective Sentence-Extraction Technique Using Contextual Information and Statistical Approaches for Text Summarization. Pattern Recognition Letters, Elsevier Science, Vol. 29, No. 9, pp. 1366-1371, July 2008. (SCIE, ISSN 0167-8655) [PDF] [Publisher]
10.Youngjoong Ko, Sooyong Park, Jungyun Seo and Soonhwang Choi. Using Classification Techniques for Informal Requirements in the Requirements Analysis-supporting System. Information and Software Technology, Elsevier Science, Vol. 49, No. 11-12, pp. 1128-1140, November 2007. (SCIE, ISSN 0950-5849) [PDF] [Publisher]
9.Hyoungdong Han, Youngjoong Ko and Jungyun Seo. Using the Revised EM Algorithm to Remove Noisy Data for Improving the One-against-the-rest Method in Binary Text Classification. Information Processing and Management, Pergamon-Elsevier Science, Vol. 43, No. 5, pp. 1281-1293, September 2007. (SSCI, SCIE, ISSN 0306-4573) [PDF] [Publisher]
8.Bojun Shim, Youngjoong Ko and Jungyun Seo. Using IS-A Relation Patterns for Factoid Questions in Question Answering Systems. IEICE Transactions on Information and System, Vol. E89-D, No. 12, pp. 2985-2989, December 2006. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
7.Kyungsun Kim, Youngjoong Ko and Jungyun Seo. Improving Korean Speech Acts Analysis by Using Shrinkage and Discourse Stack. Proceedings of The Second International Joint Conference on Natural Language Processing (IJCNLP-05), in Jeju, Korea, Oct. 13-15, 2005. Lecture Notes in Artificial Intelligence (LNAI), in Springer Verlag., Vol. 3651, pp. 731-741. October 2005. (SCIE, ISSN 0302-9743) [PDF]
6.Wooncheol Jung, Youngjoong Ko and Jungyun Seo. Automatic Text Summarization Using Two-step Sentence Extraction. Proceedings of Asian Information Retrieval Symposium (AIRS 2004), in Beijing, China, pp.43-48, Oct, 2004. Lecture Notes in Computer Science (LNCS), in Springer Verlag. Vol. 3411, pp. 71-81. March 2005.(SCIE, ISSN 0302-9743) [PDF]
5.Bojun Shim, Youngjoong Ko and Jungyun Seo. Extracting and Utilizing of IS-A Relation Patterns for Question Answering Systems. Proceedings of Asia Information Retrieval Symposium (AIRS-05), in Jeju, Korea, Oct. 11-13, 2005. Lecture Notes in Computer Science (LNCS), in Springer Verlag. Vol. 3689, pp. 697-702. October 2005.(SCIE, ISSN 0302-9743) [PDF]
4.Youngjoong Ko and Jungyun Seo. Using the Feature Projection Technique Based on a Normalized Voting Method for Text Classification. Information Processing and Management, Pergamon-Elsevier Science, Vol. 40, No. 2, pp.191-208, March 2004. (SSCI, SCIE, ISSN 0306-4573) [PDF] [Publisher]
3. Youngjoong Ko, Jinwoo Park and Jungyun Seo. Improving Text Categorization Using the Importance of Sentences. Information Processing and Management, Pergamon-Elsevier Science, Vol. 40, No. 1, pp.65-79, January 2004. (SSCI, SCIE, ISSN 0306-4573) [PDF] [Publisher]
2. Youngjoong Ko, Kono Kim and Jungyun Seo. Topic Keyword Identification for Text Summarization Using Lexical Clustering. IEICE Transactions on Information and System, Vol. E86-D, No. 9, pp.1695-1701, September 2003. (SCIE, ISSN 0916-8532) [PDF] [Publisher]
1.Sooyong Park, Harksoo Kim, Youngjoong Ko and Jungyun Seo. Implementation of an Efficient Requirements Analysis Supporting System Using Similarity Measure Techniques. Information and Software Technology, Elsevier Science, Vol. 42, No. 6, pp.429-438, April 2000. (SCIE, ISSN 0950-5849) [PDF] [Publisher]

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Refereed International Conference Papers


21.Dongsuk O, Sunjae Kwon, Kyungsun Kim and Youngjoong Ko. Word Sense Disambiguation Based on Word Similarity Calculation Using Word Vector Representation from a Knowledge-based Graph. Proceedings of the 27th International Conference on Computational Linguistics (COLING 2018), pp. 2704-2714, in Santa Fe, New-Mexico, USA, August 2018. (SCOPUS) [PDF]
20.Juae Kim, Soonjae Kwon, Youngjoong Ko and Jungyun Seo. A Method to Generate a Machine-labeled Data for Biomedical Named Entity Recognition with Various Sub-Domains. Proceedings of International Workshop on Digital Disease Detection Using Social Media (IJCNLP 2017), pp. 47-51, in Taiwan, November 2017. [PDF]
19.Soonjae Kwon, Youngjoong Ko and Jungyun Seo. A Robust Named-Entity Recognition System Using Syllable Bigram Embedding with Eojeol Prefix Information. Proceedings of the 26th ACM International Conference on Information and Knowledge Management (CIKM 2017), pp. 2139-2142, in Singapore, November 2017. (SCOPUS) [PDF]
18.Changsu Lee, Youngjoong Ko and Jungyun Seo. A Simultaneous Recognition Framework for the Spoken Language Understanding Module of Intelligent Personal Assistant Software on Smart Phones. Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics (ACL 2015), pp. 818-822, in Beijing, China, July 2015. (SCOPUS) [PDF]
17.Kyoungman Bae and Youngjoong Ko. An Effective Question Expanding Method for Question Classification in cQA services. Proceedings of the 7th Workshop for Ph.D Students at CIKM 2014, pp. 51-55, in Shanghai, China, Nov. 2014. [PDF]
16.Kyoungman Bae and Youngjoong Ko. An Effective Category Classification Method Based on a Language Model for Question Category Recommendation on a cQA service. Proceedings of the 21st ACM International Conference on Information and Knowledge Management (CIKM 2012), pp. 2255-2258, in Maui Hawaii, USA, Oct-Nov. 2012. (SCOPUS) [PDF]
15.Shinil Kim, Seon Yang and Youngjoong Ko. Mathematical Equation Retrieval Using Plain Words as a Query. Proceedings of the 21st ACM International Conference on Information and Knowledge Management (CIKM 2012), pp. 2407-2410, in Maui Hawaii, USA, Oct-Nov. 2012. (SCOPUS) [PDF]
14.Youngjoong Ko. A Study of Term Weighting Schemes Using Class Information for Text Classification. Proceedings of the 35th Annual International ACM SIGIR Conference (SIGIR 2012), pp. 1029-1030, in Portland Oregon, USA, August 2012. (SCOPUS) [PDF]
13.Seon Yang and Youngjoong Ko. Extracting Comparative Entities and Predicates from Texts Using Comparative Type Classification. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies (ACL-HLT 2011), pp. 1636-1644, in Portland Oregon, USA, June, 2011. (SCOPUS) [PDF]
12.Seon Yang and Youngjoong Ko. Extracting Comparative Sentences from Korean Text Documents Using Comparative Lexical Patterns and Machine Learning Techniques. Proceedings of Joint Conference of the 47th Annual Meeting of the Association for Computational Linguistics and the 4th International Joint Conference on Natural Language Processing of the Asian Federation of Natural Language Processing, (ACL-IJCNLP 2009), pp. 153-156, in Singapore, August, 2009. (SCOPUS) [PDF]
11.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. A Plan-based Dialogue Model Using a Discourse Stack for Intelligent Human-Robot Interface Development. Proceedings of the 7th International Conference on Advanced Language Processing and Web Information Technology (ALPIT 2008), pp. 162-167, in Dalian, Liaoning, China, July 2008. [PDF]
10.Youngjoong Ko, Hongkuk An and Jungyun Seo. An Effective Snippet Generation Method Using the Pseudo Relevance Feedback Technique. Proceedings of the 30th Annual International ACM SIGIR Conference (SIGIR 2007), pp. 711-712, in Amsterdam, The Netherlands, July 2007. (SCOPUS) [PDF]
9.Sangwoo Kang, Youngjoong Ko and Jungyun Seo . A Plan-based Model for Efficient Response Generation in Dialogue User Interface. The 3rd CIR-COE Joint Workshop On Robot Technologies for Human-Robot Coexistence, in KIST, Seoul, Korea, September 2006.
8.Hyoungdong Han, Youngjoong Ko and Jungyun Seo. Improving Binary Text Classification Using the EM Algorithm. Proceedings of Asian Information Retrieval Symposium (AIRS 2004), pp. 325-328, in Beijing, China, October 2004. [PDF]
7.Youngjoong Ko and Jungyun Seo. Learning with Unlabeled Data for Text Categorization Using a Bootstrapping and a Feature Projection Technique. Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL 2004), pp. 255-262, in Barcelona, Spain, July 2004. (SCOPUS) [PDF]
6.Youngjoong Ko and Jungyun Seo. Text Categorization Using Feature Projections. Proceedings of the 19th International Conference on Computational Linguistics (COLING 2002), pp. 467-473, in Taipei, Taiwan, August 2002. (SCOPUS) [PDF]
5.Youngjoong Ko, Jinwoo Park and Jungyun Seo. Automatic Text Categorization using the Importance of Sentences. Proceedings of the 19th International Conference on Computational Linguistics (COLING 2002), pp. 474-480, in Taipei, Taiwan, August 2002. (SCOPUS) [PDF]
4.Choong-Nyoung Seon, Youngjoong Ko, Jeong-Seok Kim and Jungyun Seo. Named Entity Recognition using Machine Learning Methods and Pattern-Selection Rules. Proceedings of 6th Natural Language Processing Pacific Rim Symposium (NLPRS 2001), pp. 229-236, in Tokyo, Japan, November 2001. [PDF]
3.Youngjoong Ko and Jungyun Seo. Automatic Text Categorization by Unsupervised Learning. Proceedings of the 18th International Conference on Computational Linguistics (COLING 2000), pp. 453-459, in Saarbrucken, Germany, July 2000. (SCOPUS) [PDF]
2.Youngjoong Ko, Sooyong Park and Jungyun Seo. Web-based Requirements Elicitation Supporting System Using Requirements Categorization. Proceedings of Twelfth International Conference on Software Engineering and Knowledge Engineering (SEKE 2000), pp. 344-351, in Chicago, USA, July 2000. (SCOPUS) [PDF]
1.Harksoo Kim, Youngjoong Ko, Sooyong Park and Jungyun Seo. Informal Requirements Analysis Supporting System for Human Engineer. Proceedings of Conference on IEEE SMC99 (IEEE SMC 1999), Vol.3, pp. 1013-1018, in Tokyo JAPAN, October 1999. (SCOPUS) [PDF]

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Refereed Domestic Journal Papers


35. Jaehyun An and Youngjoong Ko. Semi-automatic Expansion for a Chatting Corpus Based on a K-means Clustering Method And Similarity Measure. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 46, No. 5, pp. -, May 2019. (ISSN 2383-630X) [Publisher] [DBpia]
34. Hongyun Yoo, Seunwoo Lee and Youngjoon Ko. Incremental Clustering and Multi-Document Summarization for Issue Analysis based on Real-time News. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 46, No. 4, pp. 355-362, April 2019. (ISSN 2383-630X) [Publisher] [DBpia]
33. Jungmin Yoon and Youngjoong Ko. Speech-act Analysis System Based on Dialogue Level RNN-CNN Effective on the Exposure Bias problem. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 45, No. 9, pp. 911-917, September 2018. (ISSN 2383-630X) [Publisher] [DBpia]
32. Jaehyun An and Youngjoong Ko. Korean Dependency Parser Using Dependency Relation Tag Distribution. Journal of KIISE Transactions on Computing Practices, Vol. 24, No. 9, pp. 487-492, September 2018. (ISSN 2383-6318) [Publisher] [DBpia]
31. Yoojin Jeong, Juae Kim, Youngjoong Ko and Jungyun Seo. A Named Entity Recognition Training Method Using Bagging Based Bootstrapping. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 45, No. 8, pp. 825-830, August 2018. (ISSN 2383-630X) [Publisher] [DBpia]
30. Hokyung Lee, Jaehyun An, Jungmin Yoon, Kyoungman Bae and Youngjoong Ko. A Method of Solving Entity Linking Ambiguity and NIL Entity Recognition for efficient Entity Linking based on Wikipedia. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 44, No. 8, pp. 813-821, August 2017. (ISSN 2383-630X) [Publisher] [DBpia]
29. Hongyun Yoo and Youngjoong Ko. The Expansion of Word Representation for Named Entity Recognition Based on Bidirectional LSTM CRFs. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 44, No. 3, pp. 306-313, March 2017. (ISSN 2383-630X) [Publisher] [DBpia]
28.Hokyung Lee, Seon Yang and Youngjoong Ko. Feature Expansion based on LDA Word Distribution for Performance Improvement of Informal Document Classification. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 43, No. 9, pp. 1008-1014, September 2016. (ISSN 2383-630X) [Publisher] [DBpia]
27. Kyoungman Bae, Sungho Kim, Juryong Cheon and Youngjoong Ko. Constructing language resources based on the Wikipedia for the semantic analysis. Communications of KIISE, Vol. 34, No. 8, pp. 30-36, August 2016. (ISSN 1229-6821) [Publisher] [DBpia]
26.Namhoon Song, Kyoungman Bae and Youngjoong Ko. Effective Korean Speech-act Classification Using a Classification Priority Application and a Post-correction Rule. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 43, No. 1, pp. 80-86, January 2016. (ISSN 2383-630X) [Publisher] [DBpia]
25. Juryong Cheon and Youngjoong Ko. Building a Korean-English Parallel Corpus by the Measurement of Sentence Similarities Using the Sequential Matching of Language Resources and Topic Modeling. Journal of Korean Institute of Information Scientists and Engineers (KIISE), Vol. 42, No. 7, pp. 901-909, July 2015. (ISSN 2383-630X) [Publisher] [DBpia]
24.Sunghyun Kim, Seon Yang and Youngjoong Ko. Extracting Korean-English Parallel Sentences from Wikipedia. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 41, No. 8, pp. 580-585, August 2014. (ISSN 1229-6848) [Publisher] [DBpia]
23.Changsu Lee and Youngjoong Ko. A Simultaneous Recognition Method of Named Entities and Objects for the Language Understanding Module of a Dialogue-based Private Secretary System. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 41, No. 4, pp. 295-301, April 2014. (ISSN 1229-6848) [Publisher] [DBpia]
22.Kyoungman Bae, Sunghyun Kim, Youngjoong Ko and Jonghoon Kim. An Efficient Named Entity and Topic Word Recognition Method Based on Named Entity Pattern in a Natural Language Interface. Journal of Korean Institute of Information Technology (KIIT), Vol. 12, No. 1, pp. 121-130, January 2014. (ISSN 1598-8619) [DBpia]
21.Kyoungman Bae, Youngjoong Ko and Jonghoon Kim. A Topic Classification Method Based on a Language Model Using the Structural Features of the Question-Answer Pair on cQA. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 39, No. 8, pp. 664-671, August 2012. (ISSN 1229-6848) [Publisher] [DBpia]
20.Seon Yang and Youngjoong Ko. Extracting Comparative Elements for Korean Comparison Mining. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 38, No. 12, pp. 689-696, December 2011. (ISSN 1229-6848) [Publisher] [DBpia]
19.Sungho Kim, Sangjun Bae and Youngjoong Ko. Word Sense Disambiguation and Feature Extraction for Query Expansion Method based on Korean Wikipedia. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Computing Practices and Letters, Vol. 17, No. 3, pp. 185-189, March 2011. (ISSN 1229-7712) [Publisher] [DBpia]
18.Yonghyun Park, Jaewon Hwang and Youngjoong Ko. Korean Noun Extractor using Occurrence Patterns of Nouns and Post-noun Morpheme Sequences. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 37, No. 12, pp. 919-927, December 2010. (ISSN 1229-6848) [Publisher] [DBpia]
17.Shinil Kim, Seon Yang and Youngjoong Ko. A Word Spacing System based on Syllable Patterns for Memory-constrained Devices. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 37, No. 8, pp. 653-658, August 2010. (ISSN 1229-6848) [Publisher] [DBpia]
16.Sangjun Bae and Youngjoong Ko. Automatic Construction of Class Hierarchies and Named Entity Dictionaries using Korean Wikipedia. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Computing Practices and Letters, Vol. 16, No. 4, pp. 492-496, April 2010. (ISSN 1229-7712) [Publisher] [DBpia]
15.Jaewon Hwang and Youngjoong Ko. A Korean Document Sentiment Classification System based on Semantic Properties of Sentiment Words. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 37, No. 4, pp. 317-322, April 2010. (ISSN 1229-6848) [Publisher] [DBpia]
14.Kyoungman Bae, Jaewon Hwang, Youngjoong Ko and Jonghoon Kim. A Search-Result Clustering Method based on Word Clustering for Effective Browsing of the Paper Retrieval Results. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 37, No. 3, pp. 139-146, March 2010. (ISSN 1229-6848) [Publisher] [DBpia]
13.Seon Yang and Youngjoong Ko. Transformation-based Learning for Korean Comparative Sentence Classification. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 37, No. 2, pp. 155-160, February 2010. (ISSN 1229-6848) [Publisher] [DBpia]
12.Jaewon Hwang and Youngjoong Ko. A Document Sentiment Classification System Based on the Feature Weighting Method Improved by Measuring Sentence Sentiment Intensity. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 36, No. 6, pp. 491-497, June 2009. (ISSN 1229-6848) [Publisher] [DBpia]
11.Jaewon Hwang and Youngjoong Ko. A Korean Emotion Features Extraction Method and their Availability Evaluation for Sentiment Classification. Korean Journal of Cognitive Science, Vol. 19, No. 4, pp. 499-517, December 2008. (ISSN 1226-4067) [DBpia]
10.Sangjoon Bae and Youngjoong Ko. The Set Expansion System Using the Mutual Importance Measurement Method to Automatically Build up Named Entity Domain Dictionaries. Korean Journal of Cognitive Science, Vol. 19, No. 4, pp. 443-458, December 2008. (ISSN 1226-4067) [DBpia]
9.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. Using Plan Recognition and a Discourse Stack for Effective Response Generation in a Dialogue System. Korean Journal of Cognitive Science, Vol. 19, No. 2, pp. 107-124, June 2008. (ISSN 1226-4067) [DBpia]
8.Youngjoong Ko and Jungyun Seo. Automatic Text Categorization Based on Semi-Supervised Learning. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 35, No 5, pp. 325-334, May 2008. (ISSN 1229-6848) [Publisher] [DBpia]
7.Jaewon Hwang and Youngjoong Ko. A Korean Sentence and Document Sentiment Classification System Using Sentiment Features. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Computing Practices and Letters, Vol. 14, No. 3, pp. 336-340, May 2008. (ISSN 1229-7712) [Publisher] [DBpia]
6.Wonil Kim, Youngjoong Ko and Jungyun Seo. An Effective Adaptive Dialogue Strategy Using Reinforcement Learning. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 35, No. 1, pp. 33-40, January 2008. (ISSN 1229-6848) [Publisher] [DBpia]
5.Hyoungdong Han, Youngjoong Ko and Jungyun Seo. A Text Categorization Method Improved by Removing Noisy Training Documents. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 32, No. 9, pp. 912-919, September 2005. (ISSN 1229-6848) [Publisher] [DBpia]
4.Youngjoong Ko and Jungyun Seo. Text Classification Based on the Feature Projection Technique with Robustness from Noisy Data. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 31, No. 4, pp. 143-149, April 2004. (ISSN 1229-6848) [Publisher] [DBpia]
3.Youngjoong Ko, Jinwoo Park and Jungyun Seo. Improving Text Categorization by Text Summarization Techniques. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 29, No. 5-6, pp. 417-424, June 2002. (ISSN 1229-6848) [Publisher] [DBpia]
2.Youngjoong Ko, Kisun Kang, Jaeseon Kim, Sooyoung Park and Jungyun Seo. Web-based Requirements Elicitation Supporting System using Requirements Sentences Categorization. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 27, No. 4, pp. 384-392, April 2000. (ISSN 1229-6848) [Publisher] [DBpia]
1.Harksoo Kim, Youngjoong Ko, Sooyong Park and Jungyun Seo. An Efficient Analysis Method for User Requirements by Similarity Measure Techniques. Journal of Korean Institute of Information Scientists and Engineers (KIISE): Software and Applications, Vol. 27, No. 1, pp. 13-23, January 2000. (ISSN 1229-6848) [Publisher] [DBpia]

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Refereed Domestic Conference Papers


72.Yeoungjoon Park, Minyeong Seo, Juae Kim, Youngjoong Ko and Jungyun Seo. Hierarchical SVM Classifier using Bootstrapping for Domain Expansion in Analysis of Speech Act. Proceedings of Korea Software Congress 2018 (KSC 2018), pp. 602-604, December 2018.
71.Yongsin Park and Youngjoong Ko. CNN Based Speech-act Classification Using Sentence Types and Modalities. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 642-648, October 2018.
70. Seon Yang, Heymin Kim and Youngjoong Ko. Performance Improvement of Mathematical Formula Retrieval Using Two Different Kinds of Embedding. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 616-622, October 2018.
69.Hyemin Kim, Seon Yang and Youngjoong Ko. Effective Korean POS Tagging for Typing Errors Using the Concatenation of Jamo and Syllable Embedding. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 574-579, October 2018.
68Guanghao Xu, Youngjoong Ko and Jungyun Seo. Expanding Korean/English Parallel Corpora Using Back-translation for Neural Machine Translation. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 470-473, October 2018.
67. Bosung Kim, Juae Kim, Jeongeom Lee, Seona Kim, Youngjoong Ko and Jungyun Seo. An Effective Sentence Similarity Measure Method Based FAQ System Using Self-Attentive Sentence Embedding. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 361-363, October 2018.
66.Jeongmin Yoon and Youngjoong Ko. A Joint Learning Model for Speech-act Analysis and Slot Filling Using Bidirectional GRU-CRF Based on Attention Mechanism. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 252-255, October 2018.
65.Minyeong Seo, Taesuk Hong, Juae Kim, Youngjoong Ko and Jungyun Seo. Hierarchical Attention Based CNN-RNN Networks for the Korean Speech-act Analysis. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 243-246, October 2018.
64.Gihwan Kim, Jisu Seo, Kyungyeol Lee and Youngjoong Ko. Multi-class Classification System Based on Multi-loss Linear Combination for Word Spacing and Sentence Boundary Detection. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 185-188, October 2018.
63.Hongyeon Yu, Seungwoo Lee and Youngjoong Ko. News Clustering and Multi-Document Summarization for Real-time Issue Analysis. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 132-140, October 2018. (Best Paper Award)
62.Hongyeon Yu, Seungwoo Lee and Youngjoong Ko. Summarization Based Multi-news Title Extraction Using Term Relevance Estimation and Byte Pair Encoding. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 115-119, October 2018.
61.Jaehyun An and Youngjoong Ko. Semi-automatic Expansion for a Chatting Corpus Based on Similarity Measure Using Utterance Embedding by CNN. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 95-100, October 2018. (Best Paper Award)
60.Seungwook Lee, Hongyeon Yu and Youngjoong Ko. Deep Learning Based Causal Relation Extraction with Expansion of Training Data. Proceedings of the 30th Annual Conference on Human and Cognitive Language Technology (HCLT 2018), pp. 61-68, October 2018.
59.Jungmin Yoon and Youngjoong Ko. The Korean Speech-Act Analysis System Based on RNN-CNN for Speech-Act Analysis of Dialogue Level. Proceedings of Korea Software Congress 2017 (KSC 2017), pp. 643-645, December 2017. (Best Paper Award)
58.Hongyeon Yoo and Youngjoong Ko. Economical Sentence Classification Using the Information of N-gram Sentences Based on Topic Matching Measure. Proceedings of Korea Software Congress 2017 (KSC 2017), pp. 622-624, December 2017.
57.Jaehyun An and Youngjoong Ko. The Korean Dependency Parser for Pointer Networks based on Multi-task learning and Relation Label Distribution of Syllables. Proceedings of Korea Software Congress 2017 (KSC 2017), pp. 613-615, December 2017. (Best Presentation Paper Award)
56.Hyemin Kim, Seon Yang and Youngjoong Ko. Memory and Time Optimization through Reduction of Pre-analyzed Eojeol Dictionaries in Korean POS Analysis. Proceedings of Korea Software Congress 2017 (KSC 2017), pp. 646-648, December 2017.
55.Yoojin Jeong, Juae Kim, Youngjoong Ko and Jungyun Seo. Bagging Based Bootstrapping Method to Improve Named Entity Recognition. Proceedings of Korea Software Congress 2017 (KSC 2017), pp. 631-633, December 2017. (Best Paper Award)
54.Hongsun Yeom, Youngjoong Ko and Jungyun Seo. User Utterance's Intent Detection in Dialogue System with Syllable Embedding Using Convolutional Neural Network. Proceedings of Korea Computer Congress 2017 (KCC 2017), pp. 618-620, June 2017.
53.Juae Kim, Hongsun Yeom, Youngjoong Ko and Jungyun Seo. How to Utilize Named Entity Analysis to Improve Sentiment Analysis. Proceedings of Conference on Korea Cognitive Science Society, May 2017.
52.Hongyeon Yu and Youngjoong Ko. Car Manual Analysis for Constructing a Causal Relation Annotated Corpus. Proceedings of Conference on Korea Cognitive Science Society, May 2017.
51. Jungmin Yoon and Youngjoong Ko. A Semantic Role Labeling Model based on Bi-LSTM-CRFs using Expanded Word Representation by SRL Label Distribution of Syllable. Proceedings of Conference on Korea Cognitive Science Society, May 2017.
50.Hyemin Kim, Jungmin Yoon, Jaehyun An, Kyoungman Bae and Youngjoong Ko. Syllable-based Korean POS Tagging using POS Distribution and Bidirectional LSTM CRFs. Proceedings of the 28th Annual Conference on Human and Cognitive Language Technology (HCLT 2016), pp. 3-8, October 2016.
49.Hongyeon Yu and Youngjoong Ko. Named Entity Recognition Using Bidirectional LSTM CRFs Based on the POS Tag Embedding and the Named Entity Distribution of Syllables. Proceedings of the 28th Annual Conference on Human and Cognitive Language Technology (HCLT 2016), pp. 105-110, October 2016. (Best Paper Award)
48.Jaehyun An, Hokyung Lee and Youngjoong Ko. Korean Dependency Relation Labeling Using Bidirectional LSTM CRFs Based on the Dependency Path and the Dependency Relation Label Distribution of Syllables. Proceedings of the 28th Annual Conference on Human and Cognitive Language Technology (HCLT 2016), pp. 14-19, October 2016.
47.Hokyung Lee, Kyoungman Bae and Youngjoong Ko. A Similarity-based Dialogue Modeling with Case Frame and Word Embedding. Proceedings of the 28th Annual Conference on Human and Cognitive Language Technology (HCLT 2016), pp. 220-225, October 2016.
46.Jungmin Yoon, Kyoungman Bae and Youngjoong Ko. Korean Semantic Role Labeling Based on Bidirectional LSTM CRFs Using the Semantic Label Distribution of Syllables. Proceedings of the th Annual Conference on Human and Cognitive Language Technology (HCLT 2016), pp. 324-332, October 2016.
45.Juryong Cheon and Youngjoong Ko. Improving Query Translation by Extracting Parallel Sentences from Wikipedia for Cross-Language Information Retrieval. Proceedings of the 27th Annual Conference on Human and Cognitive Language Technology (HCLT 2015), pp. 35-40, October 2015. (Best Paper Award)
44.Jungmin Yoon, Jaewon Hwang and Youngjoong Ko. Semi-automatic Object-Action Extractor to Build the Utterance Corpus for the Dialogue System. Proceedings of the 27th Annual Conference on Human and Cognitive Language Technology (HCLT 2015), pp. 220-223, October 2015.
43.Namhoon Song, Kyoungman Bae and Youngjoong Ko. Efficient Korean Speech-Act Classification Using a Classification Priority Application and a Post Correction Rule. Proceedings of Korea Computer Congress 2015 (KCC 2015), pp. 675-677 June 2015. (Best Paper Award)
42.Taehyun Kim, Chnagsu Lee, Jaewon Hwang and Youngjoong Ko. Automatic Acquisition of Korean Named Entity Annotated Corpus from Wikipedia. Proceedings of Korea Computer Congress 2015 (KCC 2015), pp. 745-747, June 2015.
41.Hokyung Lee, Seon Yang and Youngjoong Ko. A Twitter Users' Tendency Clustering Method Using LDA Word Distibutions for Complexity Reduction. Proceedings of Winter Conference on Korean Institute of Information Scientists and Engineers (KIISE 2014), pp. 471-473, December 2014.
40.Juryong Cheon and Youngjoong Ko. Extracting Korean-English Parallel Sentences Based on the Measure of Sentences Similarity Using the Sequential Matching of Heterogeneous Language Resources. Proceedings of the 26th Annual Conference on Human and Cognitive Language Technology (HCLT 2014), pp. 127-132, October 2014. (Best Paper Award)
39.Jaewon Hwang and Youngjoong Ko. Dual SMS SPAM Filtering: A Graph-based Feature Weighting Method. Proceedings of the 26th Annual Conference on Human and Cognitive Language Technology (HCLT 2014), pp. 95-99, October 2014.
38.Seon Yang and Youngjoong Ko. Extracting Multi-type Elements Consisting of Multi-words from Sentences. Proceedings of the 26th Annual Conference on Human and Cognitive Language Technology (HCLT 2014), pp. 73-77, October 2014.
37.Changsu Lee and Youngjoong Ko. An Out-of-vocabulary Processing Technology for the Spoken Language Understanding Module of a Dialogue Based Private Secretary Software. Proceedings of the 26th Annual Conference on Human and Cognitive Language Technology (HCLT 2014), pp. 3-8, October 2014.
36.Soonpil Jang, Youngmin Park, Sangwoo Kang, Myoungwan Koo, Jungyun Seo, Harksoo Kim and Youngjoong Ko. A Dialogue Platform for an Interactive Personal Assistant Software. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2010), pp. 572-574, November 2013.
35.Seon Yang and Youngjoong Ko. Reranking Search Results for mathematical Equation Retrieval Using Topic Models. Proceedings of the 25th Annual Conference on Human and Cognitive Language Technology (HCLT 2013), pp. 77-81, October 2013.
34.Changsu Lee and Youngjoong Ko. A Simultaneous Recognition Technology of Named Entities and Objects for a Dialogue Based Private Secretary Software. Proceedings of the 25th Annual Conference on Human and Cognitive Language Technology (HCLT 2013), pp. 18-23, October 2013. (Best Paper Award)
33.Hokyung Lee, Juryong Chun, Namhoon Song and Youngjoong Ko. Analyzing ages, gender, location on Twitter Using LDA. Proceedings of the 25th Annual Conference on Human and Cognitive Language Technology (HCLT 2013), pp. 116-119, October 2013.
32.Junyoung Lee, Seon Yang and Youngjoong Ko. Mathematical Equation Retrieval by Converting Plaintext Queries into MathML Terms. Proceedings of Korea Computer Congress 2012 (KCC 2012), Vol. 39, No. 1(B), pp. 312-314, June 2012. (Best Paper Award)
31.Sunghyun Kim, Kyoungman Bae and Youngjoong Ko. The Efficient Named Entity Extraction Method Based on Ontology in a Schedule and a Personal Information Management Domain. Proceedings of KIISE Symposium Ubiquitous Computing and Web Information Technology 2011 (UCWIT 2011), Vol. 5, No. 3, pp. 177-182, December 2011.
30.Seon Yang and Youngjoong Ko. Extracting Comparative Elements from Comparative Sentence. Proceedings of Korea Computer Congress 2011 (KCC 2011), Vol. 38, No. 1(A), pp. 225-228, June 2011. (Best Paper Award)
29.Shinil Kim, Seon Yang and Youngjoong Ko. A Mathematical Equation Retrieval System Based on Formula Patterns Expressed in Korean. Proceedings of Korea Computer Congress 2011 (KCC 2011), Vol. 38, No. 1(A), pp. 233-236, June 2011.
28.Sungho Kim, Sangjoon Bae and Youngjoong Ko. Aumbiguity Resoluion and Expansion of Query using Wikipedia. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2010), Vol. 37, No. 2(A), pp. 46-47, November 2010. (Best Paper Award)
27.Jaewon Hwang, Yonghyun Park and Youngjoong Ko. The Effective Dialogue Modeling for Intelligent Companion Robot. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2010), Vol. 37, No. 2(A), pp. 44-45, November 2010.
26.Shinil Kim, Seon Yang and Youngjoong Ko. A Comparative Study on Feature Combination for MathML Formula Classification. Proceedings of the 22nd Annual Conference on Human and Cognitive Language Technology (HCLT 2010), pp. 37-41, October 2010.
25.Yonghyun Park, Jaewon Hwang and Youngjoong Ko. A Light-weighted Noun Extractor for Mobile Information Retrieval. Proceedings of KIISE Symposium Ubiquitous Computing and Web Information Technology (UCWIT 2009), Vol. 3, No. 2, pp. 167-171, December 2009.
24.Shinil Kim, Seon Yang and Youngjoong Ko. A Light-weighted Automatic Segmentation System Using Syllable Features. Proceedings of KIISE Symposium Ubiquitous Computing and Web Information Technology (UCWIT 2009), Vol. 3, No. 2, pp. 163-166, December 2009.
23.Sangjoon Bae and Youngjoong Ko. Automatic Construction of Korean Named Entity Dictionaries from Wikipedia. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2009), Vol. 36, No. 2(A), pp. 78-79, November 2009. (Best Paper Award)
22.Jaewon Hwang and Youngjoong Ko. A Semantic Orientation Method of Sentiment Features Based on the General and Domain-Dependent Characteristics. Proceedings of the 21st Annual Conference on Human and Cognitive Language Technology (HCLT 2009), pp. 155-159, October 2009.
21.Seon Yang and Youngjoong Ko. Classifying Korean Comparative Sentences Using Transformation-based Learning. Proceedings of the 21st Annual Conference on Human and Cognitive Language Technology (HCLT 2009), pp. 31-34, October 2009. (Best Paper Award)
20.Hyounil Jeong, Youngjoong Ko and Jungyun Seo. A News Article Summarization Method Using the Pseudo Relevance Feedback Technique. Proceedings of Korea Computer Congress 2009 (KCC 2009), Vol. 36, No. 1(B), pp. 101-104, July 2009.
19.Jaewon Hwang and Youngjoong Ko. A Weight Boosting Method of Sentiment Features for Korean Document Sentiment Classification. Proceedings of the 20th Annual Conference on Human and Cognitive Language Technology (HCLT 2008), pp. 200-205, October 2008.
18.Seon Yang and Youngjoong Ko. Extracting Korean Comarative Sentences by Machine Learning Techniques. Proceedings of the 20th Annual Conference on Human and Cognitive Language Technology (HCLT 2008), pp. 182-187, October 2008.
17.Sangjoon Bae and Youngjoong Ko. Automatic Named Entities Extraction Using the Graph-based Measurement Technique of the Mutual Importance. Proceedings of the 20th Annual Conference on Human and Cognitive Language Technology (HCLT 2008), pp. 17-22, October 2008. (Best Paper Award)
16.Kyoungman Bae, Jongtak Back, Youngjoong Ko and Jonghoon Kim. An Automated FAQ Answering System Based on Sentence Normalization Using Korean Sentence Patterns. Proceedings of the 20th Annual Conference on Human and Cognitive Language Technology (HCLT 2008), pp. 171-175, October 2008.
15.Sangwoo Kang, Hongmin Park, Youngjoong Ko and Jungyun Seo. The Corpus-based Dialogue System Using a Dialogue Transition Network and a Similarity Measure Method. Proceedings of the 20th Annual Conference on Human and Cognitive Language Technology (HCLT 2008), pp. 161-165, October 2008.
14.Kyoungman Bae, Youngjoong Ko, Hoseop Choi and Jonghoon Kim. A Clustering Method Based on K-means Algorithm for Paper Search Results. Proceedings of the 1st KIISE IT symposium, Vol. 1, No. 1, pp. 217-222, December 2007.
13.Jeawon Hwang and Youngjoong Ko. A Korean Sentiment Classification System Using Effective Emotion Features. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2007), Vol. 34, No. 2, pp. 60-61, October 2007. (Best Paper Award)
12.Byoungwoo Kim and Youngjoong Ko. The Design and Implementation of an Information Retrieval System Using Lexico-Semantic Pattern and Ontology. Proceedings of Conference on Human and Computer Interaction (HCI 2007), Vol. 1, pp. 957-962, February 2007.
11.Jeawon Hwang, Taegyun Jeon and Youngjoong Ko. A Sentiment Classification System Using Feature Extraction from Seed Words and Support Vector Machine. Proceedings of Conference on Human and Computer Interaction (HCI 2007), Vol. 1, pp. 938-942, February, 2007.
10.Hongguk An, Youngjoong Ko, Jungyun Seo. An Effective Snippet Generation Method Using Text Summarization Techniques Based on Pseudo Relevance Feedback. Proceedings of Conference on Human and Computer Interaction (HCI 2007), Vol. 1, pp. 174-181, February 2007.
9.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. Using Plan Recognition and a Discourse Stack for Efficient Response Generation in a Dialogue System. Proceedings of the 18th Annual Conference on Human and Cognitive Language Technology (HCLT 2006), pp. 177-182, October 2006.
8.Sangwoo Kang, Youngjoong Ko and Jungyun Seo. The Design of a Plan-based Dialogue Model for Intelligent Human-Robot Development. The 6th Workshop for Robot Development Technologies, August 2006.
7.Hyoungdong Han, Youngjoong Ko and Jungyun Seo. Improving Performance of Binary Text Classification Using the EM Algorithm. Proceedings of Fall Conference on Korean Institute of Information Scientists and Engineers (KIISE 2004), pp. 790-792, October 2004.
6.Bojun Shim, Youngjoong Ko, Harksoo Kim and Jungyun Seo. Extracting and Utilizing is-a Relation Patterns for Question Answering System. Proceedings of the 16th Annual Conference on Human and Cognitive Language Technology (HCLT 2004), pp. 181-188, October 2004.
5.Wooncheol Jung, Youngjoong Ko and Jungyun Seo. Automatic Text Summarization with Two Step Sentence Extraction. Proceedings of Spring Conference on Korean Institute of Information Scientists and Engineers (KIISE 2004), pp. 910-912, April 2004.
4.Kono Kim, Youngjoong Ko and Jungyun Seo. Automatic Text Summarization with Lexical Clustering. Proceedings of Spring Conference on Korean Institute of Information Scientists and Engineers (KIISE 2002), pp. 463-465, April 2002.
3.Jinwoo Park, Youngjoong Ko and Jungyun Seo. Automatic Text Categorization Using Text Summarization Techniques. Proceedings of the 13th Annual Conference on Human and Cognitive Language Technology (HCLT 2006), pp. 138-145, October 2001.
2.Harksoo Kim, Youngjoong Ko, Sooyoung Park and Jungyun Seo. Efficient Analysis of User Requirements by Measuring the Similarity of Documents. Proceedings of Conference on Human and Computer Interaction (HCI 1999), pp. 73-79, February 1999.
1. Youngjoong Ko and Jungyun Seo. Speech Act Analysis with Facial Expressions and Gestures in a Multi-modal Dialogue System. Proceedings of Conference on Korea Cognitive Science Society, pp. 199-204, 1999.

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Dissertation


Ph.D.Youngjoong Ko. Text Categorization Using Unlabeled Data. Sogang University, 2003. (in English) [PDF]
MS.ThesisYoungjoong Ko. Automatic Text Categorization by Unsupervised Learning. Sogang University, 2000. (in Korean)

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Books


Book.Youngjoong Ko et al. 정보처리개론. 생능출판사, [ISBN 978-89-7050-576-3 93560]
Book.Youngjoong Ko et al. 과학기술 시소러스 구축 연구. 한국과학기술정보연구원, [ISBN 89-5884-663-1 93500]
Book.Youngjoong Ko et al. 범용 과학기술 및 IT 분야분류체계 개발과 시소러스 연동 방안 연구 (The Construction of General and IT Category Maps and Category Tagging on Thesaurus). 동아대학교 산학협력단, supported by 한국과학기술정보연구원, [K-06-IS-01-03R-6]

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Patents


Patent Application.Youngjoong Ko et al. Device and Method for Analyzing Speech-act. 출원일: 2018.11.26 (출원번호 제 10-2018-0147852 호)
Patent Application.Youngjoong Ko et al. System and Method for Expansion Chatting Corpus Based on Similarity Measure Using Utterance Embedding by CNN. 출원일: 2018.10.05 (출원번호 제 10-2018-0119113 호)
Patent Application.Youngjoong Ko et al. System and Method for Extracting Deep Learning Based Causal Relation with Expansion of Training Data. 출원일: 2018.10.05 (출원번호 제 10-2018-0119107 호)
Patent Application.Youngjoong Ko et al. System and Method for Korean POS Tagging Using the Concatenation of Jamo and Syllable Embedding. 출원일: 2018.10.05 (출원번호 제 10-2018-0119102 호)
Patent Application.Youngjoong Ko et al. Keyword Extraction Method and Apparatus for Science Document. 출원일: 2017.11.02 (출원번호 제 10-2017-0145461 호)
Patent Registration.Youngjoong Ko et al. Named-entity Recognition Method and Apparatus for Korean. 출원일: 2017.10.18 (출원번호 제 10-2017-0134970 호), 등록일: 2019.01.17, (제 10-1941692호)
Patent Application.Youngjoong Ko et al. Method for Natural Language Understanding Based on Distribution of Task-specific Labels. 출원일: 2017.08.18 (출원번호 제 10-2017-0104871 호)
Patent Application.Youngjoong Ko et al. Syllable-based Korean POS Tagging Using POS Distribution and Bidirectional LSTM CRFs and Method of the same. 출원일: 2017.08.18 (출원번호 제 10-2017-0104916 호), 등록일: 2019.07.12, (제 10-1997783호)
Patent Registration.Youngjoong Ko et al. System and Method for Sentence Embedding and Similar Question Retrieving. 출원일: 2017.05.16 (출원번호 제 10-2017-0060425 호), 등록일: 2018.11.23, (제 10-1923650호)
Patent Application.Youngjoong Ko et al. Method for Improvement of Efficiency of Biology Medical Terminology Named Entity Recognition Apparatus Using Automatic Labeling Learning Data Based on Bootstrapping Technique. 출원일: 2017.02.14 (출원번호 제 10-2017-0020231 호)
Patent Registration.Youngjoong Ko et al. Query Translator and Method for Cross-language Information Retrieval using Linguistic Resources from Wikipedia and Parallel Corpus. 출원일: 2014.07.17 (출원번호 제 10-2014-0090447 호), 등록일: 2016.04.21, (제 10-1616031 호)
Patent Registration.Youngjoong Ko. Feature Weighting Apparatus for User Utterance Information Classification in Dialogue System and Method of the Same. 출원일: 2014.06.30 (출원번호 제 10-2014-0080978 호), 등록일: 2015.10.27, (제 10-1565143 호)
Patent Registration.Youngjoong Ko et al. A Simultaneous Recognition Technology for the Language Understanding Module of a Dialogue System. 출원일: 2014.05.16 (출원번호 제 10-2014-0059159 호), 등록일: 2015.10.05, (제 10-1559576 호)
Patent Registration.Youngjoong Ko et al. Plain Text Query Based Mathematical Formula Retrieval. 출원일: 2014.05.16 (출원번호 제 10-2014-0059144 호), 등록일: 2015.11.04, (제 10-1567904 호)
Patent Application.Youngjoong Ko et al. User Terminal and Method for Providing Summary of Web Page. 출원일: 2008.01.30 (출원번호 제 10-2008-0009731 호)
Patent Registration.Youngjoong Ko et al. Automatic Text Categorization Method Based on Unsupervised Learning, Using Keywords of Each Category and Measurement of the Similarity between Sentences. 출원일: 2001.03.09 (출원번호 제 2001-0012318 호), 등록일: 2004.02.12, (제 10-0420096 호)

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Program Copyrights


Program Copyright Registration.Youngjoong Ko et al. 딥러닝 기반 인과관계 분석 프로그램. 창작일: 2018.11.16, 공표일: 2018.11.20 (C-2018-033948)
Program Copyright Registration.Youngjoong Ko et al. 실시간 뉴스 기사 계층적 군집화 프로그램. 창작일: 2018.10.16, 공표일: 2018.10.17 (C-2018-029728)
Program Copyright Registration.Youngjoong Ko et al. 다중 뉴스 기사 요약 시스템. 창작일: 2018.10.16, 공표일: 2018.10.17 (C-2018-029727)
Program Copyright Registration.Youngjoong Ko et al. 레이블 자동 생성을 위한 한국어 의존 구문 분석기. 창작일: 2017.11.7, 공표일: 2017.11.7 (C-2017-029032)
Program Copyright Registration.Youngjoong Ko et al. 위키피디아를 이용한 Entity Linking(개체연결) 시스템. 창작일: 2017.01.23, 공표일: 2017.01.25 (C-2017-003030)

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