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Media Cloud is an open-source content analysis tool that aims to map news media coverage of current events. It "performs five basic functions -- media definition, crawling, text extraction, word vectoring, and analysis."〔Media Cloud. (About ). Retrieved 2011-10-12〕 Media cloud "tracks hundreds of newspapers and thousands of Web sites and blogs, and archives the information in a searchable form. The database ... enable() researchers to search for key people, places and events — from Michael Jackson to the Iranian elections — and find out precisely when, where and how frequently they are covered."〔Patricia Cohen. "Hot Story to Has-Been: Tracking News via Cyberspace." New York Times, August 5, 2009〕 Media Cloud was developed by the Berkman Center for Internet & Society at Harvard University and launched in March 2009.〔Berkman Center. (Media Cloud ). Retrieved 2011-10-12〕〔Alisa Miller. Media Makeover: Improving the News One Click At a Time. TED Books, 2011〕 It's distributed under the GNU GPL 3+.〔https://github.com/berkmancenter/mediacloud#user-content-license〕 As of October 2011, Media Cloud tracks news from mostly U.S. sources. It "collects news stories" in sets from:〔Media Cloud. (Media sets ). Retrieved 2011-10-12〕 * "Top 25 mainstream media sources from the U.S. according to the Google Ad Planner service" (includes ''New York Times,'' BBC, etc.) * "1000 most influential U.S. political blogs according to Technorati" (examples include ''Outside the Beltway'' ()) * "1000 most popular feeds in Bloglines" (such as Gawker) * "All public feeds from whitehouse.gov" ==What Media Cloud does== On May 6, 2011 the Berkman Center relaunched Media Cloud, “a platform designed to let scholars, journalists and anyone interested in the world of media ask and answer quantitative questions about media attention. For more than a year, we’ve been collecting roughly 50,000 English-language stories a day from 17,000 media sources, including major mainstream media outlets, left and right-leaning American political blogs, as well as from 1000 popular general interest blogs.” The data was used to “analyze the differences in coverage of international crises in professional and citizen media and to study the rapid shifts in media attention that have accompanied the flood of breaking news that’s characterized early 2011.”〔 International research has lead way to publishing of “new research that uses Media Cloud to help us understand the structure of professional and citizen media in Russia and in Egypt.”〔 The relaunch of Media Cloud allows users who are interested in using its tools to analyze “what bloggers and journalists are paying attention to, ignoring, celebrating or condemning."〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Media Cloud」の詳細全文を読む スポンサード リンク
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