TABLE I.

Mobile / Body Sensors

Sensor	Measurement
Accelerometer	acceleration in x/y/z directions
Gyroscope	rotational velocity
Location	latitude, longitude, altitude
Camera	surrounding image / video
Compass	orientation
Microphone	surrounding audio
App status	usage of apps, phone, text
Photodiodes	heart rate
Glucometer	blood sugar
Barometer	atmospheric pressure
Carbon dioxide (CO2)	CO2 concentration
Electrocardiography (ECG)	cardiac activity
Electroencephalogram (EEG)	brain activity
Electromyography (EMG)	muscle activity
Electroculography (EOG)	eye movement
Force	screen touch pressure
Light	ambient light level
Proximity	nearness to external object
Pulse oximetry	blood oxygen saturation
Galvanic Skin Response (GSR)	perspiration
Thermal	temperature