Bulletin of Japanese Society for the Science of Design

As a rule, if the evaluation is good then it is bought, and if the evaluation is bad then it isn't bought, in case of consumers' evaluation on products, though the evaluation itself is vague. Human experiential and consious rule is to be modeled using Fuzzy set Theory when it contains vagueness. This paper adopts home telephones as the case study, and composes the consumers' evaluation model on products. Firstly, items of evaluation on home telephones and the degree of these importance were obtained from groupe interviews and questionnaire to analyze the consciousness of consumers. Secondly, the consumers' evaluation model on products is composed through Fuzzy inferance. Then the propriety and issues of the model were considered by concrete calculation.

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This study is based on the recent considerable change of our life such as shorter working hours which create the ample spare time. In old days, the word "leisure" meant simply to utilize the spare time. But, nowadays, it dose not stay within the framework of precious definition. The purpose of this study as its first step is to make clear the people's view of leisure, then the final purpose is to know how the leisure environment should be. On this paper, I tried to clear up the structure of leisure meanings through the survey on the ski leisure. Main results of this study are as follows. There are established that the social function of leisure are devided in 3 Phases as rest, amusement, selfdevelopment It is clarified that these functions are overlapped in individual meanings in leisure. And also it become clear that peoples ideal of leisure is well-balanced on these 3 Phases. But, general social condition obstruct this. These results made me to think about the future course improvement of leisure environment.

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A new method is proposed for constructing a symmetric 3D model in computer from a 2D image. This method can be applied to a photograph or a sketch in which a mirror symmetric object is shown in perspective. The three dimensional coordinates of the object can be obtained by using the relation of the mirror symmetric plane and the corresponding pair points after finding the vanishing point,the viewing point and the mirror symmetric plane. 3D models with some vagueness can be constructed by this method from designer' s sketch for a replacement of making clay models. The labor saving of the design process is expected.

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In this paper, I considered the relationship between time-measuring instruments and the people in the Tokugawa Shognate,from the viewpoint of cultural history on the basis of various historical materials concerning the creation and development of "wa-dokei".Particularly the main themes are; a detailed account of the introducsion of European mechanical clocks and watches; the birth and actual productive circumstaces of clockmakers called "tokei-shi"; and the historical context of "karakuri"that was closely related to "wa-dokei". The substance which has been extracted from the historical material is as follows:1)the impact of Francisco Zaviel's preaching activity,2)the appearance of clock-makers at the beginning of the Tokugawa Shogunate and their contributions to the development of"wa-dokei",and 3)the technical skills together with human resources that resulted in the devices called "karakuri".Karakuri zui written by Hosokawa Yoritada gives a significant meaning as it clarified the connection between "wa-dokei" and "karakuri".

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