Autonomous tour guide robot by using ultrasonic range sensors and QR code recognition in indoor environment. - Seok Ju Lee; Jongil Lim; Girma S. Tewolde; Jaerock Kwon (EIT, 2014)

Ultrasonic-sensor deployment strategies and use of smartphone sensors for mobile robot navigation in indoor environment. - Jongil Lim; Seok Ju Lee; Girma S. Tewolde; Jaerock Kwon (EIT, 2014)

Design and implementation of vehicle tracking system using GPS/GSM/GPRS technology and smartphone application. - Seok Ju Lee; Girma S. Tewolde; Jaerock Kwon (WF-IoT, 2014)

QR-code based Localization for Indoor Mobile Robot with validation using a 3D optical tracking instrument. - Seok Ju Lee; Girma S. Tewolde; Jongil Lim; Jaerock Kwon (AIM, 2015)

Vision based localization for multiple mobile robots using low-cost vision sensor. - Seok Ju Lee; Girma S. Tewolde; Jongil Lim; Jaerock Kwon (EIT, 2015)

Indoor localization and navigation for a mobile robot equipped with rotating ultrasonic sensors using a smartphone as the robot's brain. - Jongil Lim; Seok Ju Lee; Girma S. Tewolde; Jaerock Kwon (EIT, 2015)