On the eigenstructure of linear quasi-time-invariant systems. - Heyoung Lee; Zeungnam Bien (Int. J. Syst. Sci., 1998)

A theory of incremental circle transform and its application for pose determination of two-dimensional objects. - Bum-Jae You; Zeungnam Bien; Heyoung Lee (Pattern Recognit. Lett., 1999)

KARES: Intelligent wheelchair-mounted robotic arm system using vision and force sensor. - Won-Kyung Song; Heyoung Lee; Zeungnam Bien (Robotics Auton. Syst., 1999)

Multiobjective Navigation of a Guide Mobile Robot for the Visually Impaired Based on Intention Inference of Obstacles. - Dong-oh Kang; Sung-Hun Kim; Heyoung Lee; Zeungnam Bien (Auton. Robots, 2001)

Robust higher-order iterative learning control for a class of nonlinear discrete-time systems. - Yong-Tae Kim; Heyoung Lee; Heung-Sik Noh; Z. Zenn Bien (SMC, 2003)

Bandpass variable-bandwidth filter for reconstruction of signals with known boundary in time-frequency domain. - Heyoung Lee; Zeungnam Bien (IEEE Signal Process. Lett., 2004)

Linear time-varying filter with variable bandwidth. - Heyoung Lee; Zeungnam Bien (ISCAS, 2006)

Minimal Representation of Speech Signals for Generation of Emotion Speech and Human-Robot Interaction. - Heyoung Lee; Z. Zenn Bien (RO-MAN, 2007)

Robotic smart house to assist people with movement disabilities. - Kwang-Hyun Park; Zeungnam Bien; Ju-Jang Lee; Byung Kook Kim; Jong-Tae Lim; Jin-Oh Kim; Heyoung Lee; Dimitar H. Stefanov; Dae-Jin Kim; Jin-Woo Jung; Jun-Hyeong Do; Kap-Ho Seo; et al. (Auton. Robots, 2007)

Estimation of Indoor Physical Activity Level Based on Footstep Vibration Signal Measured by MEMS Accelerometer in Smart Home Environments. - Heyoung Lee; Jung Wook Park; Abdelsalam Helal (MELT, 2009)

Estimation of Instantaneous Bandwidth and Reconstruction of Noisy ECG Signal Measured by a 24- Hour Continuous Healthcare System for the Elderly and People with Disabilities. - Heyoung Lee; Z. Zenn Bien (ICOST, 2010)

A Variable Bandwidth Filter for Estimation of Instantaneous Frequency and Reconstruction of Signals With Time-Varying Spectral Content. - Heyoung Lee; Zeungnam Zenn Bien (IEEE Trans. Signal Process., 2011)

The SAMS: Smartphone Addiction Management System and Verification. - Heyoung Lee; Heejune Ahn; Samwook Choi; Wanbok Choi (J. Medical Syst., 2014)

Data collection and analysis of smartphone use and sleep of secondary school children. - Heejune Ahn; Giang T. Nguyen 004; Heyoung Lee; Sun-Jin Jo; Eun-Jin Kim; Hyeon-Woo Yim (BigComp, 2017)