"Twitter engineers Jimmy Lin and Miguel Rios have analyzed data from four different cities worldwide to show....insights into human behavior, they found differences in activity and sleeping times...Tokyo Twitter users have a relatively constant sleep schedule throughout the year....Japanese users’ activities are concentrated in the evening, whereas in the other cities there is more usage during the day."
Source: WHEN DOES THE WORLD SLEEP?
By Emma Hutchings
June 13, 2012.
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