Asako Miura

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After the Great East Japan Earthquake in Japan 2011, numerous tweets were exchanged on Twitter. Several studies have already pointed out that micro-blogging systems have shown potential advantages in emergency situations, but it remains unclear how people use them. This paper presents a case study of how people used Twitter after the Great East Japan(More)
`2channel ' is the most popular, i.e., attracting enormous number of the Internet users, online-community site in Japan. However nobody knows the reasons of the popularity because most of the topics discussed in 2channel look like graffiti or meaningless descriptions. In this paper, we measure the characteristics of 2channel by 8 indices proposed here, and(More)
In this article, we investigated the expression of emotional responses to the 2011 Great East Japan Earthquake by analyzing the frequency of negative emotional terms in tweets posted on Twitter, one of the most popular social media platforms. We focused on differences in time-series variations and diurnal changes between two kinds of disasters: natural(More)