Concepts inEvaluating similarity measures: a large-scale study in the orkut social network
Orkut
Orkut is a social networking website that is owned and operated by Google Inc. The service is designed to help users meet new and old friends and maintain existing relationships. The website is named after its creator, Google employee Orkut Büyükkökten. Although Orkut is less popular in the United States than competitors Facebook and MySpace, it is one of the most visited websites in India and Brazil.
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Social network
A social network is a social structure made up of a set of actors (such as individuals or organizations) and the dyadic ties between these actors. The social network perspective provides a clear way of analyzing the structure of whole social entities. The study of these structures uses methods of social network analysis to identify local and global patterns, locate influential entities, and examine network dynamics.
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Online community
An online community is a virtual community that exists online and whose members enable its existence through taking part in membership ritual. An online community can take the form of an information system where anyone can post content, such as a Bulletin board system or one where only a restricted number of people can initiate posts, such as Weblogs. Online communities have also become a supplemental form of communication between people who know each other primarily in real life.
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Collaborative filtering
Collaborative filtering (CF) is a technique used by some recommender systems. Collaborative filtering has two senses, a narrow one and a more general one. In general, collaborative filtering is the process of filtering for information or patterns using techniques involving collaboration among multiple agents, viewpoints, data sources, etc. Applications of collaborative filtering typically involve very large data sets.
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User (computing)
A user is an agent, either a human agent (end-user) or software agent, who uses a computer or network service. A user often has a user account and is identified by a username (also user name). Other terms for username include login name, screen name (also screenname), nickname (also nick), or handle, which is derived from the identical Citizen's Band radio term.
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Social issues
Social issues are issues which relate to people's personal lives and interactions.
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