GNSS Based Low-Cost Magnetometer Calibration.

With the development of MEMS sensors, the magnetometer has increasingly become a part of various wearable devices. The magnetometer measures the intensity of the magnetic field in all three axes, resulting in a 3D vector-direction and power. Calibration must be done before using a magnetometer, especially in wearable electronics, due to the low quality of the sensor and high proximity to other electromagnetic emission sources.

Spherical Robots for Special Purposes: A Review on Current Possibilities.

The review discusses the possibilities of different driving mechanisms and sensors of spherical robots, and a special kind of mobile robots is introduced and discussed. The sensors discussed can expand robots' sensing capabilities which are typically very limited. Most spherical robots have holonomic characteristics and protect the inner environment using a shell.