NDLI: Automatic modeling of user's real world activities from the web for semantic IR

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Automatic modeling of user's real world activities from the web for semantic IR

Content Provider	ACM Digital Library
Author	Fukazawa, Yusuke Ota, Jun
Abstract	We have been developing a task-based service navigation system that offers to the user services relevant to the task the user wants to perform. The system allows the user to concretize his/her request in the task-model developed by human-experts. In this study, to reduce the cost of collecting a wide variety of activities, we investigate the automatic modeling of users' real world activities from the web. To extract the widest possible variety of activities with high precision and recall, we investigate the appropriate number of contents and resources to extract. Our results show that we do not need to examine the entire web, which is too time consuming; a limited number of search results (e.g. 900 from among 21,000,000 search results) from blog contents are needed. In addition, to estimate the hierarchical relationships present in the activity model with the lowest possible error rate, we propose a method that divides the representation of activities into a noun part and a verb part, and calculates the mutual information between them. The result shows almost 80% of the hierarchical relationships can be captured by the proposed method.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISBN	9781450301305
DOI	10.1145/1863879.1863884
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-04-26
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Activity model Web mining Co-occurrence analysis
Content Type	Text
Resource Type	Article

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