Attendance Monitoring Using Adjustable Power UHF RFID and Web-Based Real-Time Automated Information System. - Quoc-Hung Chiem; Kha-Tu Huynh; Minh-Thien Nguyen; Minh-Duy Tran; Xuan-Phuc Phan Nguyen; Tu-Nga Ly (FDSE, 2021)