地球上任兩人 經6.6人就產生關連

[MK]

http://tw.news.yahoo.com/article/url/d/ ... 8/ehm.html
更新日期:2008/08/03 04:09
〔編譯胡立宗／綜合報導〕假設人跟人之間就算不認識還是有某種關連的「小世界現象」，首度獲得證實。根據微軟ＭＳＮ資料庫，研究人員發現，陌生人之間的「人際間隔」平均為六．六個人，雖然比原先假設的多一點，但還是顯示全球人類間驚人的關連性。


所謂的「小世界現象」或「小世界效應」，是假設世界任何角落的兩個陌生人，只要透過六個人當中介，就可以和彼此拉上關係。這個假設因此又被稱為六度分隔理論（six degrees of separation）。


以好萊塢影星凱文．貝肯為名的「凱文．貝肯的六度分隔」也是以上述理論為基礎，任何一個演過電影的人都可以在六個中介人的串連下與凱文．貝肯產生關係。甚至連已故教宗若望保祿二世，都因為在二○○○年演出過一部電影，可以由三個演員中介和凱文．貝肯扯上關係。


這套理論最早是在一九六○年代由兩位學者進行小規模測試，但當時的結果並不夠全面。後來陸續有人以電子郵件對此進行測試，但還是無法全面證實這個理論。直到最近，透過ＭＳＮ龐大的用戶資料庫，才完成理論實證。


研究人員利用一億八千萬名使用者的三百億通訊息進行比對，並假設通過至少一次訊息的使用者就算認識，結果發現任何使用者只要透過平均六．六個人就可以和全資料庫的一千八百億組配對產生關連。


此外，雖然最長的一組得靠二十九個中介者才能拉上線，但高達七十八％的配對都可以在七個中介內連上。


研究人員說，這項發現不只是證明了「小世界現象」的存在，同時也可以有更廣泛的應用潛能，「比如說政治動員、募款活動、天災救助，以及失蹤協尋」，「利用一組特定的人當起點，一按enter就能輕易地能將訊息傳遞給全世界的人」。

[pikachiu]

這其實是在說明人類的social network不是random的,而是屬於scale-free network, 像是internet或protein-protein interaction network.
會有small world phenomenon是因為有superstar存在(像是認識很多人的政客,明星等),使得average distance變得很小

[growthcamp]

火星人的部分~
我稍後再做研究!

[pediatric_surf]

我很好奇自己要怎樣才會跟琥碧戈柏扯上關係

[se]

我很好奇自己要怎樣才會跟琥碧戈柏扯上關係

這裡所有的人和林志玲之間只隔了一個台北客.....

[Cate]

我很好奇自己要怎樣才會跟琥碧戈柏扯上關係

這裡所有的人和林志玲之間只隔了一個台北客.....

可以代為要簽名嗎?
台北客大大你就跟他說你兒子也要一張。

[xkuk]

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