We present the concept of folksonomical peer-to-peer (P2P) file sharing networks that allow participants (peers) to freely assign structured search tags to files. These networks are similar to folksonomies in the present Web from the point of view that users assign search tags to information distributed over a network. As a concrete example, we consider an unstructured P2P network using vectorized Kansei (human sensitivity) information as structured search tags for file search. Vectorized Kansei information as search tags indicates what participants feel about their files and is assigned by the participant to each of their files. A search query also has the same form of search tags and indicates what participants want to feel about files that they will eventually obtain. A method that enables file search using vectorized Kansei information is the Kansei query-forwarding method, which probabilistically propagates a search query to peers that are likely to hold more files having search tags that are similar to the query. The similarity between the search query and the search tags is measured in terms of their dot product. The simulation experiments examine if the Kansei query-forwarding method can provide equal search performance for all peers in a network in which only the Kansei information and the tendency with respect to file collection are different among all of the peers. The simulation results show that the Kansei query forwarding method and a random-walk-based query forwarding method, for comparison, work effectively in different situations and are complementary. Furthermore, the Kansei query forwarding method is shown, through simulations, to be superior to or equal to the random-walk based one in terms of search speed.

In this paper, we discuss the issue of empathy-inducing effect brought by Japanese Haiku, regarded as the world-shortest poetry. Its condensed form of word combination sometimes arouses deep impression and empathy in readers. Its possibilities as communication media would be enhanced in multimedia contexts, when considering educational purpose or cross-cultural interchanges. An experimental result is shown for evaluating multimedia effect on combined presentation of a CG drawing and its associated haiku in English. We confirmed that various aspects of visual impression and empathy were sometimes enhanced with certain haiku text as linguistic stimuli, compared with the condition of viewing a CG drawing only. The reason of raised empathy was analyzed from the various aspects of the content provided by the associated haiku text complementary for the drawing. Moreover, we examined the effects of poetic styles on subjects' empathy, using Japanese prose and conventional haiku style (5-7-5 syllabic rhyme), both of them were translated from the same haiku in English.