著者
中瀬 哲史
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.228, pp.193-206, 2003 (Released:2021-08-12)

The purpose of this paper is to explain why the improvement and standardization of light water reactors were pursued in Japan, and to demonstrate what kinds of influences were brought by that. After the first Oil Crisis in 1974, Japanese nuclear power circle wanted to adopt the nuclear power as an alternative to the petrothermal power. However, operations of nuclear power plants in Japan confronted many troubles at that time, thereby lowering the operating rates of nuclear power plants and causing strong opposition among the people living in the vicinity of relevant sites. In 1975, the Ministry of International Trade and Industry, together with the Japanese electric power and nuclear industries, embarked on the improvement and standardization of light water reactors in order to regain "reliability " of nuclear power generation. The project succeeded in improving reliability, which consequently increased the share of nuclear power generation and led a steady increase in plant construction. However, the "success " of this improvement and standardization project raised a new issue: An excess confidence in this technological attainment caused, on one hand, reluctance to invest fund for further technological improvement and, on the other, atmosphere not to permit prolongation of inspection period, together with the pressure for cost reduction under the circumstances of liberalization of electric power in progress since mid 1990s.

1 0 0 0 OA 紹介

出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.226, pp.119-126, 2003 (Released:2021-08-13)
著者
江沢 洋
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.227, pp.153-167, 2003 (Released:2021-08-12)
被引用文献数
1
著者
菅原 国香
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.225, pp.40-48, 2003 (Released:2021-08-13)

This paper deals with the original Dutch text of a reference book entitled Nyushi Inpu in Seimi Kaiso (1837-1847) compiled by Yoan Udagawa, and also with a critical comparison of abridged translations in Seimi Kaiso and the original Dutch text. Through a close comparative examination of both the books, the author has found out the following facts. The original Dutch text of Nyushi Inpu is Algemeen Woordenboek van Kunsten en Wetenschappen, a Dutch encyclopedia in 8 volumes (1820-1829) compiled by Gt. Nieuwenhuis. The abridged description of H. Davy's discoveries of potassium and sodium by electrolysis with the voltaic pile in 1807 is seen in Seimi Kaiso, where the description originated from the fifth volume "(N-Q)" of the Nieuwenhuis's encyclopedia published in 1825. Yoan Udagawa accurately introduced the concept of the poles of the voltaic pile before Faraday's idea (1833) into Japan in Seimi Kaiso.

1 0 0 0 OA 紹介

出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.225, pp.58, 2003 (Released:2021-08-13)
著者
荒川 英央
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.226, pp.101-111, 2003 (Released:2021-08-13)

This paper explores who were the authors of science textbooks for secondary schools under the educational system of prewar Japan, with the objective to reexamine the historical involvement of science researchers or science educationists at higher educational institutions, with science education in secondary schools. In achieving this aim, the paper investigates the occupational and educational careers of the authors of science textbooks for secondary schools. Major findings are as follows : (1) In the mid-Meiji era, it was not uncommon for secondary school teachers themselves to write science textbooks for secondary schools. It is thus suggested their teaching activities played an important part in establishing the base of Japanese science textbooks at the secondary level. (2) At the end of Meiji era, the number of secondary school teachers who wrote science textbooks was exceeded by that of the educators at higher normal schools. (3) By the second half of Taisho era, however, the educators at higher normal schools were surpassed by science researchers at imperial universities. (4) Most authors were graduates of imperial universities or higher normal schools. While their respective numbers had been in the ratio of approximately 2 : 1, the proportion of imperial university graduates increased during the Showa era. Therefore, with respect to the science education in secondary schools, although the degree of pace varied according to the type of schools, the selection and organization of educational knowledge through the writing of textbooks had gradually depended more on the staffs of higher educational institutions, especially the science researchers at imperial universities.
著者
日野川 静枝
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.226, pp.65-75, 2003 (Released:2021-08-13)

This paper clarifies the process through which two cyclotrons were built in England in the 1930s. They were developed by John D. Cockcroft at Cambridge University's Cavendish Laboratory and by Bernard B. Kinsey working under James Chadwick at the University of Liverpool, both in close cooperation with the Metropolitan-Vickers Electrical Company, Ltd. This firm was interested in commercial production of radioactive isotopes and, through development of the cyclotron at the Cavendish, aimed to gain expertise in cyclotron engineering. Development policy at the two institutions differed, with Cockcroft imitating American cyclotrons and Kinsey creating a cyclotron using new technology. While both projects were affected by the overall demands of military production, the two laboratories' respective development policies combined with their differing relations with M-V to create about one year's difference in the completion dates of the two cyclotrons.
著者
肱岡 義人
出版者
日本科学史学会
雑誌
科学史研究 (ISSN:21887535)
巻号頁・発行日
vol.42, no.226, pp.88-100, 2003 (Released:2021-08-13)

Going against chemical tradition, Becher using a cosmological-geological approach focussed his attention on mineral bodies and fixed peculiar Principles that were water and three Earths. It is not certain that his new Principles had any important historical values. But his hierarchical structure of matter that consisted of Principles, composite and decomposita, and his chemical mixture theory that mixture of bodies of lower order formed new bodies of higher order were his original ideas and not realized by other iatro-chemists of those days. These two ideas were to some extent imaginary and not clearly demonstrated. Nevertheless, it is important that he found two levels of composita and decomposita among matters that were actually handled by human's hands. Of course chemists had often made plural matter interact mutually to obtain new bodies. But until then it was generally believed that real existing bodies were produced by a mixture of imagined Principles and were reduced again into original Principles. The above mentioned assumptions of Becher managed to combine the chemical activities of handling actual bodies with the consideration of chemists about how matter changed and by doing so, prepared the basic conditions for understanding real matter phenomena without imaginary suppositions. Up to now. historians of chemistry have only Daid attention to Becher's 'terra pinguis' in relation to the phlogiston theory of Stahl. However, Becher's idea of the hierarchical structure of matter and his mixture theory may have contributed to the modernizing of chemistry. Therefore, they would contribute to the development of chemistry in the following age. We will discuss this point when the chemistry of Stahl is examined.