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America, are you happy? The emotional words contained in hundreds of millions of messages posted to the Twitter website may hold the answer.

Computer scientist Alan Mislove at Northeastern University in Boston and colleagues have found that these “tweets” suggest that the west coast is happier than the east coast, and across the country happiness peaks each Sunday morning, with a trough on Thursday evenings. The team calls their work the “pulse of the nation”.

To glean mood from the 140-character-long messages, the researchers analysed all public tweets posted between September 2006 and August 2009. They filtered them to find tweets that contain words included in a psychological word-rating system called Affective Norms for English Words – a low-scoring word on ANEW is considered negative, a high-scoring one positive. They also filtered out tweets from users outside the US, and also from those in the US who did not include their exact location – for example, their city – in their Twitter profile.

That left 300 million tweets, each of which was awarded a mood score based on the number of positive or negative words it contained.

Full New Scientist Article

Because some things just cannot be unseen . . .

Policing the Web’s Lurid Precints

Ricky Bess spends eight hours a day in front of a computer near Orlando, Fla., viewing some of the worst depravities harbored on the Internet. He has seen photographs of graphic gang killings, animal abuse and twisted forms of pornography. One recent sighting was a photo of two teenage boys gleefully pointing guns at another boy, who is crying.

An Internet content reviewer, Mr. Bess sifts through photographs that people upload to a big social networking site and keeps the illicit material — and there is plenty of it — from being posted. His is an obscure job that is repeated thousands of times over, from office parks in suburban Florida to outsourcing hubs like the Philippines.

With the rise of Web sites built around material submitted by users, screeners have never been in greater demand. Some Internet firms have tried to get by with software that scans photos for, say, a large area of flesh tones, but nothing is a substitute for a discerning human eye.

The surge in Internet screening services has brought a growing awareness that the jobs can have mental health consequences for the reviewers, some of whom are drawn to the low-paying work by the simple prospect of making money while looking at pornography.

“You have 20-year-old kids who get hired to do content review, and who get excited because they think they are going to see adult porn,” said Hemanshu Nigam, the former chief security officer at MySpace. “They have no idea that some of the despicable and illegal images they will see can haunt them for the rest of their lives.”

Full NY Times Article