辞書ベースのテキストマイニング ML-Ask, J-LIWC, J-MDFを例として Quantifying Collective Mood by Emoticon Networks Understanding the Spreading Patterns of Mobile Phone Viruses Positive words carry less information than negative words Collective dynamics of ‘small-world’ networks Performance variability enables adaptive plasticity ‘crystallized’ adult song How sleep affects the developmental learning of bird song