Lecture-E3

Lecture-E3 - Lecture E Online Community Searching with...

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Lecture E Online Community
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Searching with Communities What is an online community ? Groups of entities (i.e., users, organizations, websites) that interact in an online environment to share common goals, interests, or traits Besides tagging, community users also post to newsgroups, blogs, and other forums To improve the overall user experiments , web search engines should automatically find the communities of a user Example . Baseball fan community, digital photography community, etc. Not all communities are made up of humans! Web communities are collections of web pages that are all about a common topic 2
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Finding Communities What are the characteristics of a community? Entities within a community are similar to each other Members of a community are likely to interact more with other members of the community than those outside of the community Can represent interactions between a set of entities as a graph Vertices are entities Edges (directed or undirected) indicate interactions between the entities 3
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Online Communities According to [Seo 09] Online communities are valuable information sources where knowledge is accumulated by interactions between people Online community pages have many unique textual or structural features, e.g., A forum has several sub-forums covering high-level topic
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This document was uploaded on 10/18/2011.

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Lecture-E3 - Lecture E Online Community Searching with...

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