<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1405-5546</journal-id>
<journal-title><![CDATA[Computación y Sistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Comp. y Sist.]]></abbrev-journal-title>
<issn>1405-5546</issn>
<publisher>
<publisher-name><![CDATA[Instituto Politécnico Nacional, Centro de Investigación en Computación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-55462022000100423</article-id>
<article-id pub-id-type="doi">10.13053/cys-26-1-4179</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Topic-Aware Sentiment Analysis of News Articles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Akhmetov]]></surname>
<given-names><![CDATA[Iskander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gelbukh]]></surname>
<given-names><![CDATA[Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mussabayev]]></surname>
<given-names><![CDATA[Rustam]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Institute of Information and Computational Technologies  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Kazakhstan</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Kazakh-British Technical University  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Kazakhstan</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Computación ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>1</numero>
<fpage>423</fpage>
<lpage>439</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-55462022000100423&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-55462022000100423&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-55462022000100423&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: We consider the problem of sentiment analysis in news media articles cast as a three-way classification task: negative, positive, or neutral. We show that subdividing the training corpus by topic (local news, sports, hi-tech, and others) and training separate sentiment classifiers for each sub-corpus improves classification F1 scores. We use topics since some words carry different sentiments in different domains: e.g., the word &#8220;force&#8221; is typically positive in the sports domain but negative in the political domain. Our experiments on the Kaggle dataset with sentiment-labeled Kazakhstani news articles in Russian language using the Convolutional Neural Network (CNN) model partially proved our hypothesis, showing that for the most prominent &#8220;kz&#8221; (local news) topic, we achieve an F1 score of 0.70, which is greater than the baseline model trained without the topic-awareness showing just 0.67. Topic-aware improves F1 scores in some topics, but due to the topic/class imbalance further research is needed. However, the performance in terms of F1 over all the corpus does not improve or the improvements are very small. Moreover, our approach shows better results on topics with many text samples than those with relatively small amounts of articles.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mass media]]></kwd>
<kwd lng="en"><![CDATA[natural language processing]]></kwd>
<kwd lng="en"><![CDATA[news articles]]></kwd>
<kwd lng="en"><![CDATA[sentiment analysis]]></kwd>
</kwd-group>
</article-meta>
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