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Zachary's Karate Club is a well-known social network of a university karate club described in "An Information Flow Model for Conflict and Fission in Small Groups" paper by Wayne W. Zachary. == Network description == A social network of a karate club was studied by Wayne W. Zachary for a period of three years from 1970 to 1972. The network captures 34 members of a karate club, documenting 78 pairwise links between members who interacted outside the club. During the study a conflict arose between the administrator "John A" and instructor "Mr. Hi" (pseudonyms), which led to the split of the club into two. Half of the members formed a new club around Mr. Hi, members from the other part found a new instructor or gave up karate. Basing on collected data Zachary assigned correctly all but one member of the club to the groups they actually joined after the split. == Zachary's methodology == Before the split each side tried to recruit adherents of another party. Thus, communication flow had a special importance and the initial group would likely split at the "borders" of the network. Zachary used the maximum flow – minimum cut Ford–Fulkerson algorithm from “source” Mr. Hi to “sink” John A: the cut closest to Mr. Hi that cuts saturated edges divides the network into the two factions. Zachary correcly predicted each member's decision except member #9, who went with Mr. Hi instead of John A. == Data set == The data set for Zachary's karate club is in open access on the internet.〔(Zachary's Karate Club data set )〕 . 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「Zachary's karate club」の詳細全文を読む スポンサード リンク
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