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A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree
MASTER OF SCIENCE
Department of Computing
Graduate School
SILPAKORN UNIVERSITY
2009
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48309322 : MAJOR : INFORMATION TECHNOLOGY
KEY WORD : WEB FILLTER / SUPPORT VECTOR MACHINE / PRINCIPAL COMPONENT
ANALYSIS
CHANPAT PINUNRATCHATHORN : SYSTEM DEVELOPING OF WEB CONTENT
FILTERING IN SECONDARY SCHOOL. THESIS ADVISOR : ASST.PROF. PANJAI
TANTATSANAWONG, Ph.D. 154 pp.
This thesis has developed to filter inappropriate websites under the Linux operating
system using Squid proxy software with ACL (Access Control List), which controlled of the web
site accessing. The research applied two algorithms to analyze including: Principal Component
Analysis (PCA) and Support Vector Machine (SVM). These algorithms are used for filtering
websites to help control Internet access in schools and allowed students to receive the
appropriate information.
Principal of the inappropriate websites filtering system used the TAG elements
structure of the site as the following META, IMG, A HREF, SCRIPT, TITLE and BODY to
create the filtering system. The inappropriate website brought to model the relationship and
used PCA to determine the value of transformation for each component to create the models.
Then model was tested by the site of 200 violence and drug websites, 200 pornographic web
sites. The results of model evaluation showed that systems can filter inappropriate websites
from normal websites, with accuracy for a group of violent and drug 89.5% and pornographic
group 94.5%. Researcher also compared to the other filtering inappropriate algorithms called
SVM using the same set of test data. The results showed that SVM method has the accuracy
of filtering websites as the following: violent and drug 89%, pornographic 91%, while the PCA
algorithms can segment data better than SVM. From the analysis showed that the elements in
BODY TAG of various sites are very important to classify normal and inappropriate websites.
However, these techniques do not apply to group words that are ambiguous and websites
which can not check the HTML Code.
Department of Computing
Graduate School, Silpakorn University
Student's signature ........................................
Thesis Advisor's signature ........................................
4
Academic Year 2009
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194. http://ict.in.th/1666
195. http://www.plazazone.com/b20/2008-62220/
196. http://thairecent.com/Crime/2010/491242/
197. http://www.click.in.th/news/local/692.html
198. http://www.ryt9.com/s/bmnd/688923
199. http://www.newswit.net/read/936351.html
200. http://thairecent.com/First/2010/502150/
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136
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http://www.over18x.com/Breakspells-vol-3.xxx
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87. http://forum.soda-zaa.com/thread-2514-1-3.html
88. http://seed.gameref.info/go/4139.html
89. http://seedcom.thai-forum.net/forum-f32/topic-t8555.htm
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96. http://oxz.freesemantic.net/hotest/2055.html
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109. http://thaisex.6x6.in/69/
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139
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147. http://goolabua.com/
148. http://www.goox.info/
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