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"I regularly use Twitter’s own search as well as TweetDeck and Kred (once I am logged in) to scan and search the hashtags and keywords.
But, Topsy is a game changer.
The free comprehensive index and social analysis tool, searches keywords, hashtags and @ signs from minutes ago or from across a span of years, retrieving your social needles from millions of haystacks of billions of tweets.
Topsy is a way to instantly discover breaking news and just released press-releases and track current conversations and just posted media."
Via Howard Rheingold, luiy
During the 2012 U.S. Presidential election, Topsy and Twitter created the Twitter Political Index (or Twindex), which provided a daily gauge of voters’ sentiment for each candidate as expressed on Twitter. Using mentions of their last name or direct @mentions of their Twitter handle, the Twindex tracked sentiment for Obama and Romney from May 1 until Election day, showing when each gained momentum in the race.
How Twitter used Topsy APIsTwitter used Topsy’s content and metrics API data to create a custom dashboard to help capture the nuance of public opinion.
Live tracking of sentiment to produce the Twindex. Additional, minute-level analysis during convention speeches and debatesMention counts on a wide array of topic areas—including the economy, foreign policy, and immigration—on a minute, hourly, and daily basisHistorical comparative analysis between the Gallup poll for presidential approval between 2010-2012 and Topsy sentiment for Obama, demonstrating a strong correlation between the two (and strongest when Topsy sentiment led the Gallup numbers by a few days)Para buscar información en twitter desde 2007. Para explorar temas al instante. Prueba #viacatalana, por ejemplo. Veras los twitts del último dia, la ultima semana, el último més 413.000. Las fotos, los links. Un invento!
Great tool to gain data / intelligence / trend / emotions from Twitter . The social analytics section is a great tool to compare keywords and concepts.