CycleGuard: A Smartphone-based Assistive Tool for Cyclist Safety Using Acoustic Ranging. - Wenqiang Jin; Srinivasan Murali; YoungTak Cho; Huadi Zhu; Tianhao Li; Rachael Thompson Panik; Anika Rimu; Shuchisnigdha Deb; Kari E. Watkins; Xu Yuan 001; Ming Li 006 (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2021)