Crowdsensing-based smartphone use guide for battery life extension. - Yohan Chon; Gwangmin Lee; Rhan Ha; Hojung Cha (UbiComp, 2016)

Tbooster: Adaptive Touch Boosting for Mobile Texting. - Nohyun Jung; Gwangmin Lee; Seokjun Lee; Hojung Cha (HotMobile, 2016)

Improving Energy Efficiency of Android Devices by Preventing Redundant Frame Generation. - Gwangmin Lee; Seokjun Lee; Geonju Kim; Yonghun Choi; Rhan Ha; Hojung Cha (IEEE Trans. Mob. Comput., 2019)