Macroanalysis of Microblogs: An Empirical Study of Communication Strategies on Twitter During Disasters and Elections. - Yuuto Fukushima; Fumito Masui; Michal Ptaszynski; Yoko Nakajima; Keisuke Watanabe; Ryotaro Kawaishi; Taisei Nitta; Ryoya Sato (AAAI Spring Symposia, 2014)