I was talking to a friend on facebook just jokingly because he said that if he had a nap...that would increase the amount of productivity in his work environment instead of utlizing him for every penny's worth. I said to him "Move to Europe" lolol. Seriously, though...Europe has an interesting working system. They do not work the constant 9-5 that Americans work. Another thing, they get longer/better paid vacations. The result more productivity overall and less jobs lost. Hmm. That brought me to read these articles. I'ma late night kind of dude but I do take sporadic naps throughout the day.
Anyway, check the articles out. It's just food for thought.