“Bright Internet as a Framework of Preventive Security”, IFIP Information Security Working Group, Delaware, October 2015
“Bright Internet as a Framework of Balancing Security and Privacy”, Workshop on Information Security and Privacy, International Conference on Information Systems, Fort Worth, December 2015
“Dynamics of National Green Policy, Green Business Strategy, and Green Technology Research Planning”, International Symposium on Sustainability, Kyoto University, August 1, 2010
“From Management Science to Management Wisdom”, Wharton Forum, Seoul, May 29, 2010
“Globalization and Localization of e-Business: Challenges and Strategies”, IEEE AMIGE 2008, Tianjin, China
“How to make Agents work in the real world”, The 2nd International Symposium on Agents and Multi-agent Systems-Technologies and Applications, Seoul, March 2008
“Ups and Downs of e-Payment and e-Banking Business”, International Workshop on Electronic Payment and Electronic Commerce in China, Chengdu, May 18-19, 2007
“Ten Lessons in E-Commerce for Business Opportunity and Challenges: SME Perspective”, Taipei Forum, September 19, 2006
“E-Commerce Trend: Observations from Literature and Reality”, The Fourth Workshop on Knowledge Economy and Electronic Commerce Program, Kaohsiung, Taiwan, Jun. 22, 2006
“Semantic Web for EC: How to overcome the hurdles and create the future?”, 7th International Conference on Electronic Commerce (ICEC 2005), Xi' An, China, Aug. 2005
“International Trend of E-Commerce”, Sino-American Workshop on Electronic Commerce, China, 2004
“Where we are in EC Research”, e-Biz World Conference, Seoul, Feb. 25, 2004
“EC Reality in Broadband Society and Challenges”, Pacific Asia Conference on Information Systems, Adelaide, Australia, July 2003
“Semantic Web with XRML”, The Second International Human.Society@Internet Conference, Seoul, June 18, 2003
“Broad Band Society and EC Thereafter”, E-Business Chair, Katholieke Universiteit, Leuven, Feb. 11, 2003
“Prospect of Taxation Systems in EC Era”, Asia-Oceania Tax Consultants’ Association, Japan Meeting, 2002
“E-Business Trend and Cases in Korea” , UN ESCAP, Nov. 13, 2002
“Artificial Intelligence in Electronic Commerce”, Pacific Rim Conference on Artificial Intelligence, Melbourne , 2000
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