Abstract
There are many occasions to read electrical texts along with the growth of computers and the Internet. Therefore, it is required to have an environment for selecting enormous information or for comprehending texts quickly. Automatic summarization methods are generally used to find or select information quickly. However, indicative summaries used in results of search engines do not express whole texts, so we cannot understand a topic is treated as one of the subjects of a text or is just partially appeared. On the other hand, informative summaries also require much time to grasp the contents of a text, because the summarization rates are not so high in order to summarize the whole text. In this paper, a system that expresses text coherence along with the topic words, the subject of a text, is described. All words in a text are classified into topic-related or not, and all are displayed in a two dimensional interface of the proposed river rafting system. This system is also applied to extract sentences that express conclusions of a text by using words repeatedly appearing related to the topic words.
