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NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information,(More)
Sentiment analysis or opinion mining is the computational study of people's opinions, appraisals, and emotions toward entities, events and their attributes. In the past few years, it attracted a great deal of attentions from both academia and industry due to many challenging research problems and a wide range of applications [1]. Opinions are important(More)
All material appearing in this report is in the public domain and may be reproduced or copied without permission from the Substance Abuse and Mental Health Services Administration. However, this publication may not be reproduced or distributed for a fee without specific, written authorization of the
DISCLAIMER SAMHSA provides links to other Internet sites as a service to its users, and is not responsible for the availability or content of these external sites. SAMHSA, its employees, and contractors do not endorse, warrant, or guarantee the products, services, or information described or offered at these other Internet sites. Any reference to a(More)
Several updates have been incorporated into this report since it was printed. These changes were made in the Web documents and are listed below, by page and paragraph. In several places, the printed version of this report indicates that 2004 estimates are similar to 2002 estimates. However, statistical testing indicates a significant difference between 2004(More)