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1、EvaluationofNodePositionBasedonMutualInteractioninSocialNetworkofInternetUsersPrzemysławKazienko1,KatarzynaMusiał1,AleksanderZgrzywa1Abstract:Averyinterestingscientificproblemistheassessmentofthenodepositionwithinthedirected,weightedgraphthatrepresentsthesocialnetworkofInternetusers.Theweightso
2、fgrapharcsareextractedfromthedataaboutusermutualcommunicationorcommonactivities.Thenewmethodofnodepositionanalysis,whichtakesintoaccountboththestrengthoftheconnectionsbetweennetworknodesanddynamicofthisstrengthispresentedinthepaper.Theresultsofexperimentsonemaildatasetweredescribedaswell.Keywo
3、rds:nodepositionassessment,socialnetworkofInternetusers,socialnetworkanalysis1.IntroductionThevariouskindsofe-commerceande-businesssolutionsthatexistinthemarketencouragedtheuserstoutilizetheInternetandavailableweb-basedservicesmorewillinglyintheireverydaylife.Manycustomerslookforservicesandgoo
4、dsthathavehighquality.Thus,notonlytheinformationprovidedbyvendorsisimpor-tantforpotentialcustomersbutalsotheopinionsofotheruserswhohavealreadyboughtthegoodsorusedtheparticularservice.Itisnaturalthatusers,togatherotherpeopleopinions,communicatewitheachotherviadifferentcommunicationchannels,e.g.b
5、yexchangingemails,commentingonforums,usinginstantmes-sengers,etc.ThisinformationflowfromoneindividualtoanotheristhebasisforthesocialnetworkofInternetusers(SNIU).Thisnetworkcanberepresentedasadirectedgraph,inwhichnodesaretheusersandtheedgesdescribetheinforma-tionflowfromoneusertoanother.Oneofthem
6、ostmeaningfulandusefulissueinsocialnetworkanalysisistheevaluationofthenodepositionwithinthenetwork.Sincethesocialnetworkdescribestheinteractionsbetweenpeople,theproblemofassessmentthenodepositionbecomesverycomplexbecausehumanswiththeirspontaneousandsocialbehaviorarehardpredictable.However,thee
7、ffortshouldbemadetoevaluatetheirstatusbecausesuchanalysiswouldhelptofinduserswhoarethemostinfluentialamongcommunitymembers,possessthehighestso-cialstatementandprobablythehighestleveloftrust(Golbeck,Hendler,2004),(Rana,Hinze,2004).Theseuser