especially mobile phones, provide remark- able opportunities for healthcare applications in a variety of
fi elds including epidemic pre- paredness, public health monitoring, and dis- tributed healthcare systems.2131 In addition to mobile phones, of particular interest are emerging wearable electronics devices such as smart watches and glasses with integrated orattachableinertiasensors,audio-visualima- ging and recording devices, and wireless connectivity.3235 One such promising smart device, the Google Glass, consists of a voice- controllable hands-free computing system withimagingandvideo-recordingcapabilities and various wireless technologies including Bluetooth and Wi-Fi (see Figure 1a). By con- necting with Android mobile phones or iPhones through Bluetooth, the Google Glass is also capable of using the cellular device's telecommunicationscapabilitiestoaccessthe Internet in areas without Wi-Fi and determine location information via global positioning systems (GPS) and/or triangulation through cellular service provider towers.