Semantic Web Search Model for Information Retrieval of the Semantic Data. - Okkyung Choi; SeokHyun Yoon; Myeongeun Oh; Sangyong Han (Human.Society@Internet 2003, 2003)

Variable Neighborhood Particle Swarm Optimization for Multi-objective Flexible Job-Shop Scheduling Problems. - Hongbo Liu 001; Ajith Abraham; Okkyung Choi; Seong Hwan Moon (SEAL, 2006)

Semantic Web Services Discovery System with QoS for Enhanced Web Services Quality. - Okkyung Choi; Heejai Choi; Zoonky Lee; Sangyong Han (CDVE, 2007)

Design and Implementation of UPnP-Based Surveillance Camera System for Home Security. - Yi Gu; Myoungjin Kim; Yun Cui; Hanku Lee; Okkyung Choi; Mu-Wook Pyeon; Jee-In Kim (ICISA, 2013)

Authority Delegation for Safe Social Media Services in Mobile NFC Environment. - Jinsung Choi; Okkyung Choi; Yun Cui; Myoungjin Kim; Hanku Lee; Kangseok Kim; Hongjin Yeh (MUSIC, 2013)

Home Appliance Control and Monitoring System Model Based on Cloud Computing Technology. - Yun Cui; Myoungjin Kim; Seung-woo Kum; Jong-jin Jung; Tae-Beom Lim; Hanku Lee; Okkyung Choi (MUSIC, 2013)

A Robust Cloud-Based Service Architecture for Multimedia Streaming Using Hadoop. - Myoungjin Kim; Seungho Han; Jong-jin Jung; Hanku Lee; Okkyung Choi (MUSIC, 2013)

Performance evaluation method for environment recognition of mobile robot employing video database. - Hyuna Kim; Bowon Jung; Okkyung Choi; Seungbin Moon (ROBIO, 2013)

Two-factor authentication system based on extended OTP mechanism. - Yunlim Ku; Okkyung Choi; Kangseok Kim; Taeshik Shon; Manpyo Hong; Hongjin Yeh; Jai-Hoon Kim (Int. J. Comput. Math., 2013)

LZCode based compression method for effectively using the memory of embedded devices. - Hyunchul Lee; Kangseok Kim; Okkyung Choi; Hongjin Yeh (Int. J. Commun. Syst., 2013)

An Extended DCT Domain Watermarking for Robot Vision against Geometric Image Attacks. - Okkyung Choi; InBae Jeon; Seung-Wha Yoo; Seungbin Moon (J. Appl. Math., 2013)

A Secure NFC-Based Mobile Printing Service Using Recognition Robot. - Eunmi Lee; Hongjin Yeh; Hyo-Sik Yang; Seungbin Moon; Okkyung Choi (Int. J. Distributed Sens. Networks, 2015)

An interactive pervasive whiteboard based on MVC architecture for ubiquitous collaboration. - Kangseok Kim; Wonjeong Ha; Okkyung Choi; Hongjin Yeh; Jai-Hoon Kim; Manpyo Hong; Taeshik Shon (Multim. Tools Appl., 2015)