Advances in pervasive health

In order to ensure longevity of operation such systems must be power aware offering the possible of degradation of service and/or power scavenging possibilities; Always-on: Pervasive Health applications by their very nature are intolerant of system outages and generally demand a near 24/7 service. Determining emotional state is important in many diagnostic cases, but especially perhaps in cases where mental health is an issue. [...]a robust and inexpensive method of eye tracking may prove indispensible in many instances as a remote diagnostic aid. [...]the encouragement of the Editor-in-Chief of this journal, Prof. Vincenzo Loia, in making this SI happen, is also acknowledged.