The lights on the London Eye, the giant Ferris wheel on the River Thames, have been programmed to change color to reflect the mood of the country toward the Olympics, as measured by the tone of social media messages Twitter users are sending. The Eye’s light show was engineered by a Boston technology firm, Sosolimited, which devised a system that analyzes the content of Olympic-related tweets and calculates a collective national mood based on the occurrence of certain words in the messages, such as “amaze,” “fear,” and “tears,” and others that suggest emotion.
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