?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Finding+Similar+Users+in+Facebook&rft.creator=De+Meo%2C+Pasquale&rft.creator=Ferrara%2C+Emilio&rft.creator=Fiumara%2C+Giacomo&rft.subject=Dynamical+Systems&rft.description=Online+social+networks+are+rapidly+asserting+themselves+as+popular+services+on+the+Web.+A+central+point+is%0D%0Ato+determine+whether+two+distinct+users+can+be+considered+similar%2C+a+crucial+concept+with+interesting+consequences+on+the+possibility+to+accomplish+targeted+actions+like%2C+for+example%2C+political+and+social+aggregations+or+commercial+promotions.+In+this+chapter+we+propose+an+approach+in+order+to+estimate+the+similarity%0D%0Aof+two+users+based+on+the+knowledge+of+social+ties+(i.e.%2C+common+friends+and+groups+of+users)%0D%0Aexisting+among+users%2C+and+the+analysis+of+activities+(i.e.%2C+social+events)+in+which+users+are+involved.+For%0D%0Aeach+of+these+indicators%2C+we+draw+a+local+measure+of+user+similarity+which+takes+into+account+only+their%0D%0Ajoint+behaviours.+After+this%2C+we+consider+the+whole+network+of+relationships+among+users+along+with+local%0D%0Avalues+of+similarities+and+combine+them+to+obtain+a+global+measure+of+similarity.+Such+a+computation+is%0D%0Acarried+out+by+applying+the+Katz+coefficient%2C+a+popular+parameter+introduced+in+Social+Science+research.%0D%0AFinally%2C+similarity+values+produced+for+each+social+activity+are+merged+into+a+unique+value+of+similarity+by%0D%0Aapplying+linear+regression.&rft.publisher=Igi+Publishing&rft.date=2011&rft.type=Book+Chapter&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F7634%2F1%2FFinding_similar_users-CR.pdf&rft.identifier=++De+Meo%2C+Pasquale+and+Ferrara%2C+Emilio+and+Fiumara%2C+Giacomo++(2011)+Finding+Similar+Users+in+Facebook.++%5BBook+Chapter%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F7634%2F