In taking part in multi-party interaction, desires or speculations such as "I want to speak instead of you now." or "Who wants to speak now?" can occur to each participant's mind. When all the participants' utterance desires are satisfied, the whole interaction becomes more productive and meaningful. Utterance desire is signified through non-verbal communication channels peculiar to each participant. We analyzed how utterance desires were signified in order to make the relationships among the participants clear.

The purpose of this study is to find the relation between the chaos theory and space perception. The tent map is a typical chaotic map and it has an interesting property related to general problems about determinism, causality, free will, and irreversibility. Then, as its generalized property, the notion of a primitive chaos is proposed, and we can see the emergence of notion of nondegenerate Peano continuum by exploring sufficient conditions for the existence of the primitive chaos from a topological viewpoint.

The Science of Hitting by Ted Williams is an excellent book. Ted Williams wrote everything about hitting he obtained through his career in this book. However his explanation on hitting mechanics is vague for it is based on his personal perception. Recently I surprisingly found that by applying the Twisting Model theory, his explanation on the hitting mechanics becomes a lot clear and helped for better understanding regarding movement and property of power produced. In this article I would like to introduce the "Twisting Model" and by using physical approach I would like to show how the Twisting Model supports Williams.