A new study by Cardiff University has determined that Twitter can be used to identify dangerous situations up to an hour faster than police reports.
Using a dataset of 1.6 million tweets from the London riots in 2011, researchers were able to have a series of machine-learning algorithms automatically scan Twitter to identify threats. The system took into account things like the location of the tweet, the frequency of tweets containing certain words (or variants of these words), and timing of the tweets.
Applying these algorithms to the London riots, they were able to detect incidents faster than police in almost every instance. For example, their system’s summarization of “not feeling the rumors that the rioters are looking to move to...
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