著者

宮入 徹 服部 遊 村越 弘章 小澤 佳佑 田中 謙介 千葉 慎一郎

出版者

日本感性工学会

雑誌

日本感性工学会論文誌 (ISSN:18845258)

巻号頁・発行日

pp.TJSKE-D-20-00060, (Released:2021-04-22)

参考文献数

20

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In many ball games, research on the sound quality of the sound generated when hitting a ball is underway. This is because the comfort of the impact sound exists as an important factor for athletes. In this study, we investigated the elements necessary for the comfortable impact sound, targeting the impact sound of badminton. In the experiment, the impression of the impact sound reproduced from the headphones was evaluated by the SD method. As a result, it was found that the impression of impact sound can be expressed by Beautiful & Metallic, Powerful and Spatial Factor. In addition, it was suggested that the Beautiful & Metallic Factor might be associated with the elastic performance in badminton competition, and the Powerful Factor might be associated with the flying performance. Furthermore, we examined acoustical characteristics that correlate well with each factor, and constructed the sound quality estimating model for the impact sounds.

著者

田中 謙介

出版者

一般社団法人 日本科学教育学会

雑誌

科学教育研究 (ISSN:03864553)

巻号頁・発行日

vol.29, no.3, pp.240-247, 2005-09-10 (Released:2017-06-30)

参考文献数

16

被引用文献数

2

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The mechanisms of how materials are colored are not mentioned in high school science programs, even though colors or changes of colors are very useful in science as indicators of chemical reactions or the presence of chemical substances, for example, litmus papers and starch-iodine titrations. The primary question, 'Why is water blue?', has never been answered in science textbooks for high school. The color of a transparent material is shown as the complementary color of absorbed light in the material. Therefore water absorbs red colored light more than green and blue ones. I developed a new device which can measure optical absorbance of pure water by using red and green laser pointers as light sources and a solar battery as a sensor. The performance of this device shows the following : 1. Red colored light is clearly more absorbed in pure water than green colored light. 2. An absorbance coefficient of red colored light could be calculated as 3.5×10-3, which is almost the same as the previously known figure (E.O. Hulburt, 1945). Laser pointers have become inexpensive and several other colors are being developed. This device which uses these light sources, is expected to be utilized for school experiments.

著者

田中 謙介

出版者

日本理科教育学会

雑誌

理科教育学研究 (ISSN:13452614)

巻号頁・発行日

vol.46, no.2, pp.39-47, 2006-01-31

参考文献数

9

被引用文献数

2

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観察・実験を重視し,体験的な学習を推進していくことが求められているなか,環境学習をはじめとして様々な化学種の定量分析をする機会が増している。微量分析には通常,高価な分析機器が必要となるが,教材として簡易比色計など自作装最も数々報告されている。今回は比色計よりも感度に優れる蛍光光度計を自作開発し,リボフラビン(ビタミンB_2),フルオレセインの濃度測定を行った。同一試料3回ずつの測定値は安定しており,2種の化合物ではいずれも良好な検量線が作成できた。以上の実験の後,本装置を用いた授業実践を行った。生物を選択する生徒16名を対象とし,一人一実験の形態でビタミン剤に含まれるリボフラビン含有量を測定させることを目的とした。授業の後,生徒の測定結果と質問紙調査から本装置の教材としての有効性を評価したが,(1)測定精度,(2)生徒の意欲・関心,(3)分析法への理解,(4)装置の操作性,いずれも良好な結果を得た。リボフラビンは栄養素としての位置づけから,理科のみならず家庭や保健においても重要な学習内容となっており,今回の教材には教科横断的活用が期待できる。