PointRing: Enabling Calibration-Free Pointing Interaction in Smart Homes with a UWB-IMU Smart Ring. - Zilong Wang 019; Borong Zhuang; Dong Zhao 001; Jinfeng Gao; Jingxu Cai; Guanzhou Zhu; Zhengyuan Zhang 001; Wenqi He; Huadong Ma (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2026)