British Airways can help determine when you are happy or sad,
As part of a study into how people react when it comes to flying at night across time zones, British Airways were interested in the mood of their passengers and so they took volunteers from Heathrow to New York and gave them “happiness blankets.”
The happiness blankets are high tech blankets that glow. Of course they cannot make a person happy or sad, but they can measure how relaxed people are. The study was undertaken to investigate how to combat jet lag on long flights across time zones.
learn more? http://techknowlist..com/2014/07/happy-or-sad-happiness-blanket-can-tell.html