Vik Sigh of Yahoo’s BOSS team has just launched a new search engine called TweetNews that mashes up Yahoo News stories with some of the hottest topics on Twitter. The result is a news engine that is significantly more timely than common news aggregators like Google News and Yahoo’s standard news site.

In his blog post describing the new release, Sigh explains that Yahoo News results are ranked solely by the time at which they were published, which is a poor measure of relevance. Some news sites try to measure the relevance of breaking news by looking at how many news publications have covered the same story, but this doesn’t work well for breaking news, as more stale stories tend to rise to the top because they have more related articles.

To combat this, Sigh’s mashup tries to use recent Twitter tweets to measure which topics are breaking, and then links to relevant stories gathered from Yahoo News.

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BOSS Developer Fuses Yahoo News With Twitter To Create TweetNews