2. Technology enablers

S. Park et al. [2, 3] explore advanced wearables and accordingly recommend guidelines for successful development and deployment of comprehensive wearable systems. Among these are the use of a variety of sensors, each sensor should be flexible, adaptive, effective and reliable.

#### 2.1 Variety of sensor types and flexible, effective and practical sensors

Sensors are needed for capturing various aspects and parameters to be handled simultaneously [4], such as vital signs sensors working at the same time and having
