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1、SocialStructureofFacebookNetworksAmandaL.Traud1,2,PeterJ.Mucha1,3,andMasonA.Porter4,51CarolinaCenterforInterdisciplinaryAppliedMathematics,DepartmentofMathematics,UniversityofNorthCarolina,ChapelHill,NC27599-3250,USA2CarolinaPopulationCenter,UniversityofNort
2、hCarolina,ChapelHill,NC27516-2524,USA3InstituteforAdvancedMaterials,Nanoscience&Technology,UniversityofNorthCarolina,ChapelHill,NC27599-3216,USA4OxfordCentreforIndustrialandAppliedMathematics,MathematicalInstitute,UniversityofOxford,OX13LB,UK5CABDyNComplexit
3、yCentre,UniversityofOxford,OX11HB,UKAbstractWestudythesocialstructureofFacebook“friendship”networksatonehundredAmericancollegesanduniversitiesatasinglepointintime,andweexaminetherolesofuserattributes—gender,classyear,major,highschool,andresidence—attheseinst
4、itutions.Weinvestigatetheinfluenceofcommonattributesatthedyadlevelintermsofassortativitycoefficientsandregressionmodels.Wethenexam-inelarger-scalegroupingsbydetectingcommunitiesalgorithmicallyandcomparingthemtonetworkpartitionsbasedontheusercharacteristics.Weth
5、erebycomparearXiv:1102.2166v1[cs.SI]10Feb2011therelativeimportancesofdifferentcharacteristicsatdifferentinstitutions,findingforexamplethatcommonhighschoolismoreimportanttothesocialorganizationoflargeinstitutionsandthattheimportanceofcommonmajorvariessignificantl
6、ybetweeninstitutions.Ourcalculationsillustratehowmicroscopicandmacroscopicperspectivesgivecomplementaryinsightsonthesocialorganizationatuniversitiesandsuggestfuturestudiestoinvestigatesuchphenomenafurther.PreprintsubmittedtoSocialNetworksFebruary11,20111.Int
7、roductionSincetheirintroduction,socialnetworkingsites(SNSs)suchasFriendster,MyS-pace,Facebook,Orkut,LinkedIn,andmyriadothershaveattractedhundredsofmillionsofusers,manyofwhomhaveintegratedSNSsintotheirdailylivestocom-municatewithfriends,sende-mails,solicitopi
8、nionsorvotes,organizeevents,spreadideas,findjobs,andmore[BoydandEllison,2007].Facebook,anSNSlaunchedinFebruary2004,nowoverwhelmsnumerousaspectsofeverydaylife,andithasbecomeanimmenselypopularsocie
