资源描述：
《what_is_twitter__a_social_network_or_a_news_media》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、WWW2010•FullPaperApril26-30•Raleigh•NC•USAWhatisTwitter,aSocialNetworkoraNewsMedia?HaewoonKwak,ChanghyunLee,HosungPark,andSueMoonDepartmentofComputerScience,KAIST335Gwahangno,Yuseong-gu,Daejeon,Korea{haewoon,chlee,hosung}@an.kaist.ac.kr,sbmoon@kaist.eduABSTRACT1.INTRODUCTIONTwitter,amicroblog
2、gingservicelessthanthreeyearsold,com-Twitter,amicrobloggingservice,hasemergedasanewmediummandsmorethan41millionusersasofJuly2009andisgrowinginspotlightthroughrecenthappenings,suchasanAmericanstu-fast.Twitteruserstweetaboutanytopicwithinthe140-characterdentjailedinEgyptandtheUSAirwaysplanecras
3、hontheHudsonlimitandfollowotherstoreceivetheirtweets.Thegoalofthisriver.Twitterusersfollowothersorarefollowed.UnlikeonmostpaperistostudythetopologicalcharacteristicsofTwitteranditsonlinesocialnetworkingsites,suchasFacebookorMySpace,thepowerasanewmediumofinformationsharing.relationshipoffollow
4、ingandbeingfollowedrequiresnoreciproca-WehavecrawledtheentireTwittersiteandobtained41:7milliontion.Ausercanfollowanyotheruser,andtheuserbeingfolloweduserprofiles,1:47billionsocialrelations,4;262trendingtopics,neednotfollowback.BeingafolloweronTwittermeansthattheand106milliontweets.Initsfollowe
5、r-followingtopologyanalysisuserreceivesallthemessages(calledtweets)fromthosetheuserwehavefoundanon-power-lawfollowerdistribution,ashorteffec-follows.Commonpracticeofrespondingtoatweethasevolvedtivediameter,andlowreciprocity,whichallmarkadeviationfromintowell-definedmarkupculture:RTstandsforret
6、weet,’@’fol-knowncharacteristicsofhumansocialnetworks[28].Inordertolowedbyauseridentifieraddresstheuser,and’#’followedbyaidentifyinfluentialsonTwitter,wehaverankedusersbythenumberwordrepresentsahashtag.Thiswell-definedmarkupvocabularyoffollowersandbyPageRankandfoundtworankingstobesim-combinedwit
7、hastrictlimitof140charactersperpostingconve-ilar.Rankingbyretweetsdiffersfromtheprevioustworankings,niencesuserswithbrevityinexpression.Theretweetmechanismindicatingagapininfluenceinferredfromthenumberoffollowersempowersuserstospreadinformatio
