The Concept of the Remote Devices Content Management

Table 1

Android sensors [18] for smart and ambient environments—overview.

Type	Functionality
Accelerometer	Sensor calculate acceleration without gravity acceleration 𝑔=9.81 m/s^2 as following equitation: 𝐴𝑑=−𝑔−∑𝐹/mass; The reason is user centric-suspected behaviour for an end-user where device in a stable position placed on the table should have acceleration 0 instead of +9.81
Ambient temperature	Ambient (room) temperature in degree Celsius
Gravity	A three-dimensional vector indicating the direction and magnitude of gravity. Units are m/s^2. The coordinate system is the same as is used by the acceleration sensor
Gyroscope	Values are in radians/second and measure the rate of rotation around the device's local 𝑋-, 𝑌-, and 𝑍-axis
Light	Ambient light level in SI lux units
Linear acceleration	A three-dimensional vector indicating acceleration along each device axis, not including gravity. All values have units of m/s^2. The coordinate system is the same as is used by the acceleration sensor The output of the accelerometer, gravity and linear-acceleration sensors must obey the following relation: acceleration = gravity + linear-acceleration
Magnetic field	Values are in micro-Tesla (uT) and measure the ambient magnetic field in the 𝑋-, 𝑌-, and 𝑍-axis
Orientation	All values are angles in degrees
Pressure	Atmospheric pressure in hPa (millibar)
Proximity	Proximity sensor distance measured in centimeters
Relative humidity	Relative ambient air humidity in percent
Rotation vector	The rotation vector represents the orientation of the device as a combination of an angle and an axis, in which the device has rotated through an angle 𝜃 around an axis ⟨𝑥,𝑦,𝑧⟩