constraints. Some of the most critical design constraints of
iBadge include form factor, energy consumption, cost, design
flexibility as well as various sensing functionalities.
iBadge must be light and small enough for children to
wear. Finding the optimal location of iBadge on a kid’s
body is still subject to investigation. In a typical operational
scenario for Smart Kindergarten, iBadge requires to
operate for 4 to 6 hours a day.