著者
西城 惠一 中島 隆
出版者
国立科学博物館
雑誌
国立科学博物館研究報告 E類 理工学 (ISSN:18819095)
巻号頁・発行日
vol.31, pp.33-84, 2008-12

We are currently studying the history of Japanese Binoculars for several years. In the course of this study, we have published some papers related to the first domestic production of binoculars in Japan and show the genealogy of propagation of manufacturing technology at that time. In this paper, we review chronologically the technological development of Japanese binoculars and show the influence of technology innovation of other optical instruments. This paper is somewhat a preliminary work but become a base of the future more comprehensive and more detailed studies. The chronological tabele of Japanese binoculars and related technology is attached.
著者
菅原 玲 田里 誠 岩田 修一 田辺 義一
出版者
国立科学博物館
雑誌
国立科学博物館研究報告 E類 理工学 (ISSN:18819095)
巻号頁・発行日
vol.30, pp.55-63, 2007-12

The history of Japanese turbine generators started with introducing the Western knowledge and technologies after Meiji Restoration, and improved mainly by referring to the Western manufacturers, especially in the initial stage. And now the Japanese technology reaches the world highest level. The Tari's research showed that an advance of generator performance has something to do with improvements of background technologies such as an ability to make greater steel ingot, and there likely should be a linkage relations among them. This paper shows the correlation graphically and the strong correlation between the unit capacity of generator and the size of turbine rotor by making a multiple-regression analysis for quantitative evaluation.