“…The system is designed for sensing human movements in a large, open space and keeps the trajectory record of such movements. In addition, this system is adapted to measure movements of triage doctors and mock patients, even in outdoor environments, which is not possible with other similar human-tracking systems, such as those at railroad crossings, 6 edges of railway platforms (Figure 1; available online only), 7 and the Expo Nagoya held in 2005 in Aichi Prefecture, Japan 8 …”