著者

矢崎 裕二

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.31, no.183, pp.129-137, 1992 (Released:2021-03-25)

著者

岩城 正夫

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.31, no.181, pp.43-50, 1992 (Released:2021-04-07)

著者

井上 隆義

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.26, no.161, pp.1-12, 1987 (Released:2021-09-22)

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August F. Horstmann is known to be the first chemist to have applied the second law of thermodynamics to chemical processes. He began to study the decomposition of substances by heat from the view-point of the kinetic theory of gases on one side (in 1868), and by the thermodynamical analogy with vaporizations on the other (in 1869). Next on th basis of the new thermodynamic formulation developed by Clausius in 1862, Horstmann promoted a better understanding with respect to the mutual relations between dissociation and thermodynamics. In 1871 he derived fundamental equations of dissociation equilibrium for substitution of watervapors with irons. A. Naumann criticized Horstmann's theory of dissociation, especially his application of a thermodynamic formula (so-called Clausius-Clapeyron's formula) to dissociation, from a standpoint of the molecular theory. Refuting Naumann's criticism, Horstmann showed that thermoclynamics and every formula deduced from it were not dependent upon any hypothesis on molecular processes, and therefore it was valid to apply thermodynamics to chemical changes Thus, in 1873 he attained a qualitatively high level of theory concerning dissociation equilibrium on the entropy maximization principle (formulated by Clausius in 1865). Then this new level of Horstmann's theory was established through his exact recognizing of the inner connection of chemical processes with the thermodynamic laws, and of the difference and the relation between microscopic processes and macroscopic ones.

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.25, no.160, pp.235-244, 1986 (Released:2021-09-22)

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A plan of plutonium bomb was existed separately from a plan of uranium bomb at the beginning of the development of atomic bombs. The following is the transition of significance of the plan of plutonium bomb. In December 1940, the plan of plutonium bomb was posed in England and U.S.A. independently. In December 1941, the plan of plutonium bomb was not stated clearly, but it was interested in whether the fission chain reaction using uranium is feasible or not. Because, such reactions will produce the "94" (plutonium) which is material of plutonium bomb. In June 1942, the plan of plutonium bomb was stated clearly, and also it caused Army and Industries to be concerned in the development of atomic bomb in earnest. In December 1942, the chain reaction was proved. So the plan of plutonium bomb was changed from which to be for ending the war to which to be concerned with the atomic power policy of the post war.

著者

菅原 国香 中村 邦光 板倉 聖宣

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.25, no.157, pp.34-45, 1986 (Released:2021-04-05)

著者

道脇 義正 木村 規子

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.22, no.147, pp.160-164, 1983 (Released:2021-09-24)

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In our previous paper we have an invariable among the bends of the touching circles, and to show that the extension⁽¹⁰¹⁾. Later, we applied Wilkey's Theorem⁽¹⁶⁾ 一 which is an extension of the Decartes Circle Theorem⁽¹⁾一 to this result, we have an interesting theorem⁽¹⁰¹⁾. And we show that a part of this result corresponds to Sir Frederick Soddy's "The Hexlet⁽¹⁴⁾". The main object of this paper are as follows: (1) Wasan experts are haven't the notion of bends and (2) Considerations for the concerning literatures.

著者

大網 功

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.21, no.141, pp.16-26, 1982 (Released:2021-05-13)

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.54, no.276, pp.386, 2016 (Released:2020-12-15)

著者

益田 すみ子

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.57, no.287, pp.168-185, 2018 (Released:2021-01-24)

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Shunkichi Kimura (1866-1938) studied quaternions during his stay in the U.S. from 1893 to 1896. In particular he deepened and widened his understanding of quaternions. Kimura was first introduced quaternions by one of Scottish teachers who were working in early Meiji Japan. These teachers were former students of Peter Guthrie Tait (1831-1901) at Edinburgh University. Tait had developed quaternions to apply to geometry and physics. One of his key ideas was that quaternions transform vectors as operators. Taitʼs students taught Japanese students, including Kimura, only Taitʼs style of quaternions aiming at application to physics and engineering. But in the U.S. Kimura found that quaternions were not only operators for transformation of vectors but also the expanded complex numbers. He recognized the need for more exchange between scientists interested in quaternions and allied systems of mathematics, and hoped promoting quaternions as pure mathematics. So he proposed for an “International Association for Promoting the study of Quaternions and Allied Systems of Mathematics” in 1895. His enthusiasm for quaternions as pure mathematics was his primary motive of this proposal. Because of difficulty of finding a president and secretaries, only in 1899, after Kimuraʼs return to Japan, was this association established by Scottish and Irish scientists and it remained active for fourteen years. Kimuraʼs proposal for this association also shows how productive he was during his three year study in the U. S.

著者

加藤 夢三

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.56, no.284, pp.2, 2018 (Released:2021-01-14)

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Jun Ishiwara was a leading Japanese physicist,but he was also a renowned poet in the early Showa era. Previous studies of Ishiwara rarely linked his literary career with his work as a physicist.The aim of this paper is to demonstrate that his theoretical framework of“reality”was rooted in both science and literature. When Ishiwara introduced Einsteinʼs theory of relativity and quantum mechanics to other writers of his time,he claimed that the development of theoretical physics dismantled so-called orderly reality. According to Ishiwara,if we apply the principles of modern physics to the actual world,we have to understand reality based on“theory”and“law”instead of experience. Therefore,in his literary work,Ishiwara emphasized the“reality”in the former sense of the word: one must extract it from experiences by integrating them into a theoretical framework.As a poet,Ishiwara not only brought“super-materialism”to literature and established“New Tanka theory”,but also contributed to a new way of recognizing the world. His view of the world attracted and influenced many literary figures in the early Showa era such as Riichi Yokomitsu and Yoichi Nakagawa. Ishiwara's interdisciplinary spirit is still present in contemporary literature.(or Ishiwaraʼs interdisciplinarity also offers a fertile ground for constructive dialogue between literature studies and historical studies of science that otherwise rarely interact with one another in the current scholarship).

著者

横山 尊

出版者

日本科学史学会 ; 2014-

雑誌

科学史研究. [第Ⅲ期] = Journal of history of science, Japan. [Series Ⅲ] (ISSN:21887535)

巻号頁・発行日

no.297, pp.66-77, 2021-04

著者

市川 浩

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.59, no.295, pp.199-213, 2020

著者

山崎 正勝

出版者

日本科学史学会

雑誌

科学史研究. [第III期] (ISSN:21887535)

巻号頁・発行日

vol.53, no.270, pp.199-210, 2014-07-24

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Japan and the United States signed in 1968 a new atomic energy agreement through which US light-water nuclear reactors, including those of the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company, were to be introduced into Japan. This paper studies the history of negotiations for the 1968 agreement using documents declassified in the 1990s in the US and Japan. After the success of the Chinese nuclear test in October 1964, the United States became seriously concerned about nuclear armament of other countries in Asia including Japan. Expecting that Japan would not have its own nuclear weapons, the US offered to help the country to demonstrate its superiority in some fields of science including peaceful nuclear energy to counter the psychological effect of the Chinese nuclear armament. Driven by his own political agenda, the newly appointed Prime Minister Eisaku Sato responded to the US expectation favorably. When he met in January 1965 with President Johnson, Sato made it clear that Japan would not pursue nuclear weapons. Although the US continued its support after this visit, it nevertheless gave priority to the control of nuclear technology in Japan through the bilateral peaceful nuclear agreement. This paper argues that the 1968 agreement implicitly meant a strategic measure to prevent Japan from going nuclear and also a tactic to persuade Japan to join the Nuclear Non -Proliferation Treaty.

著者

有賀 暢迪

出版者

日本科学史学会

雑誌

科学史研究. [第Ⅲ期] = Journal of history of science, Japan. 日本科学史学会 編 (ISSN:21887535)

巻号頁・発行日

no.272, pp.473-479, 2015-01

著者

中村 士

出版者

日本科学史学会

雑誌

科学史研究. [第III期] (ISSN:21887535)

巻号頁・発行日

vol.54, no.275, pp.192-214, 2015-10-24

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A star map with an elaborate appearance was discovered in 1998 on the ceiling inside the Kitora burial mound of Nara Prefecture (hereafter we call it the Kitora star map). From archaeological evidence, this ancient tumulus is considered to have been constructed between the end of the 7th century and the beginning of the 8th century. We had a chance to make anew positional measurements of the 28-xiu constellations depicted on this circular star map, with the purpose of inferring their observed time epoch. As sky positions of stars are subject to change due to the precession, we can estimate when the stars in the Kitora star map were observed. We adopted a statistical least-squares approach to minimize the mean positional shift for all the 28-xiu standard stars, where the positional shift of a star means the difference between its measured position and the one calculated using precession theory. For a confidence level of 90%, the confidence interval of the observation year for the Kitora star map was found to be [123BC, 39BC], or approximately 80BC ± 40. This obviously indicates that the star map is of Chinese origin. Thus, in order to investigate the relationship of the Kitora star map to ancient Chinese star catalogs, we made a statistical analysis of Shi-shi's Star Catalog, the oldest star catalog in China. By applying to it the same analysis technique as the one adopted for the Kitora star map, we obtained the confidence interval to be [65BC,43BC]. Comparison of this interval with that for the Kitora star map strongly suggests that the latter was drawn based on the Shi-shi's Catalog. A similar analysis of the Korean star map stone-inscribed in the 14th century, Ch'onsang Yolch'a Punyajido, also showed nearly the same time epoch. Finally we discuss the political and social background why the Kitora star map was produced in such an early time in Japan.

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.23, no.150, pp.127-128, 1984 (Released:2021-04-07)

著者

本庄 孝子

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.61, no.303, pp.230-242, 2022 (Released:2023-11-17)

著者

増田 耕一

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.54, no.276, pp.327, 2016 (Released:2021-01-05)

著者

鈴木 晃仁

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.53, no.269, pp.27-35, 2014 (Released:2020-12-09)

著者

石橋 悠人

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.53, no.271, pp.311, 2014 (Released:2020-12-09)