  Vigilance of an operator is compromised in performing many monotonous
activities like workshop and manufacturing floor tasks, driving, night shift
workers, flying, and in general any activity which requires keen attention of
an individual over prolonged periods of time. Driver or operator fatigue in
these situations leads to drowsiness and lowered vigilance which is one of the
largest contributors to injuries and fatalities amongst road accidents or
workshop floor accidents. Having a vigilance monitoring system to detect drop
in vigilance in these situations becomes very important.
  This paper presents a system which uses non-invasively recorded Frontal EEG
from an easy-to-use commercially available Brain Computer Interface wearable
device to determine the vigilance state of an individual. The change in the
power spectrum in the Frontal Theta Band (4-8Hz) of an individual's brain wave
predicts the changes in the attention level of an individual - providing an
early detection and warning system. This method provides an accurate, yet cheap
and practical system for vigilance monitoring across different environments.
