Online Social Networks: Measurement, Analysis, and Applications to Distributed Information Systems

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Online Social Networks: Measurement, Analysis, and Applications to Distributed Information Systems ( online-social-networks-measurement-analysis-and-applications )

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Chapter 8 Ostra: Leveraging Relationships Internet-based communication systems such as email, instant messaging (IM), voice- over-IP (VoIP), online social networks, and content-sharing sites allow communication at near zero marginal cost to users. Any user with an inexpensive Internet connection has the potential to reach millions of users by uploading content to a sharing site or by posting messages to an email list. This property has democratized content publication: anyone can publish content, and anyone interested in the content can obtain it. Unfortunately, the same property can be abused for the purpose of unsolicited marketing, propaganda, or disruption of legitimate communication. The problem manifests itself in different forms, such as spam messages in email; search engine spam in the Web; inappropriately labeled content on sharing sites such as YouTube; and unwanted invitations in IM, VoIP, and social networking systems. Unwanted communication wastes human attention, which is one of the most valu- able resources in the information age. The noise and annoyance created by unwanted communication reduces the effectiveness of online communication media. Moreover, most current efforts to automatically suppress unwanted communication occasion- ally discard relevant communication, reducing the reliability of the communication 147

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