著者

長谷川 大和 勝田 仁之

出版者

日本物理教育学会

雑誌

物理教育 (ISSN:03856992)

巻号頁・発行日

vol.61, no.3, pp.137-140, 2013

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高等学校物理では,力学的エネルギー保存則を学んだ後に運動量保存則を学ぶ。これらを学習後に取り組む典型的な問題として,動くことのできる斜面台上での物体の運動がある。このような問題では,台と物体で及ぼし合う垂直抗力がそれぞれ仕事をすることになり,これらがちようど打ち消し合うことを説明しなければ,力学的エネルギーの和が保存されることに対して生徒は違和感を持つ可能性が生じる。この問題の高等学校での取り扱いについて考察する。

著者

海老沢 研

出版者

一般社団法人日本物理学会

雑誌

日本物理學會誌 (ISSN:00290181)

巻号頁・発行日

vol.63, no.9, pp.670-677, 2008-09-05

参考文献数

12

被引用文献数

1 1

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人工衛星を用いた宇宙観測データは,一定の占有期間の後,解析ソフトウェアとともに無償で公開されることが世界的な標準となっている.データが長期間にわたってアーカイブズ化され,世界中の科学者によって広く共有されることにより,数多くの成果が生み出されるのである.それを目的とし,各国の公的機関が多くの予算とマンパワーを費やして構築した「宇宙科学データアーカイブズ」は,人類共通の貴重な知的財産と言えよう.また,宇宙科学データは,他の多くの分野の科学技術データとは異なり,その利用に金銭的な利害や倫理的な問題が絡まない,という特徴がある.その特徴を生かし,最先端の宇宙科学データを真っ先に取得して世界に公開することは,それによって国際社会からの信頼とリーダーシップを勝ち取るための貴重なソフトパワーになりうる.今後,各国が協力して科学データ共有を進め,国と国との間の信頼関係を高めていくことによって,「科学による安全保障」を実現できるようになるかもしれない.

著者

前田 慎市 菅野 祥一郎 古藤 亮平 小原 哲郎

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

pp.14-00332, (Released:2015-01-16)

参考文献数

26

被引用文献数

1

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The gaseous detonation driven gas gun was developed for accelerating the projectile to a supersonic speed. The gas gun was simply consisted of two straight stainless-steel tubes. The one was the detonation tube and the other was the launch tube. The detonation tube was 50 mm inside diameter with 2180 or 4280 mm long, and the launch tube was 5 mm inside diameter with 1040 mm long. Chapman-Jouguet detonation wave was initiated in the detonation tube, and the projectile was accelerated in the launch tube via combustion products behind the detonation wave. The spherical projectile of 4.76 mm diameter was made of high-density polyethylene with 52 mg mass. The driver mixture was stoichiometric hydrogen-oxygen premixed gas with initial pressure ranging from 120 to 450 kPa. The gas gun was successfully operated, and the maximum projectile velocity of 1400 m/s was obtained for the conditions that the detonation tube was 4280 mm long and the initial pressure of the driver gas was 450 kPa. The results of the longer detonation tube demonstrated that the projectile velocity was 1.15 - 1.25 times higher than the case of shorter detonation tube. This velocity change of the projectile could be explained by the pressure increase at the inlet of the launch tube by using longer detonation tube. The reason of the pressure increase has a possibility that the length of Taylor wave behind the detonation wave becomes longer for the case of longer detonation tube.

著者

Naohiko T. Miyashita

出版者

The Genetics Society of Japan

雑誌

Genes & Genetic Systems (ISSN:13417568)

巻号頁・発行日

vol.90, no.2, pp.61-77, 2015-04-01 (Released:2015-09-18)

参考文献数

50

被引用文献数

9 28

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Soil bacterial community structures of six dominant phyla (Acidobacteria, Proteobacteria, Verrucomicrobia, Planctomycetes, Bacteroidetes and Actinobacteria) and unclassified bacteria detected in tropical Sarawakian and temperate Japanese forests were compared based on 16S rRNA gene sequence variation. The class composition in each phylum was similar among the studied forests; however, significant heterogeneities of class frequencies were detected. Acidobacteria and Proteobacteria were the most dominant phyla in all six forests, but differed in the level of bacterial species diversity, pattern of species occurrence and association pattern of species composition with physicochemical properties in soil. Species diversity among Acidobacteria was approximately half that among Proteobacteria, based on the number of clusters and the Chao1 index, even though a similar number of sequence reads were obtained for these two phyla. In contrast, species diversity within Planctomycetes and Bacteroidetes was nearly as high as within Acidobacteria, despite many fewer sequence reads. The density of species (the number of sequence reads per cluster) correlated negatively with species diversity, and species density within Acidobacteria was approximately twice that within Proteobacteria. Although the percentage of forest-specific species was high for all bacterial groups, sampling site-specific species varied among bacterial groups, indicating limited inter-forest migration and differential movement of bacteria in forest soil. For five of the seven bacterial groups, including Acidobacteria, soil pH appeared to strongly influence species composition, but this association was not observed for Proteobacterial species. Topology of UPGMA trees and pattern of NMDS plots among the forests differed among the bacterial groups, suggesting that each bacterial group has adapted and evolved independently in each forest.

著者

川原 賢太 Ng Yoke Yan Soon Chai Fen Joshua Mutua 舎川 春佳 上須 道徳 カワハラ ケンタ トネガワ ハルカ ウワス ミチノリ

出版者

大阪大学中国文化フォーラム

雑誌

OUFCブックレット (ISSN:21876487)

巻号頁・発行日

vol.6, pp.139-149, 2015-03-10

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東アジア“生命健康園”構築に向けて : 大気汚染と健康問題を考える日中国際会議の記録

著者

山本 翼 杉浦 裕太 南澤 孝太 杉本 麻樹 稲見 昌彦

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.18, no.3, pp.371-381, 2013

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PukaPuCam is an application service that utilizes a camera attached to balloons, to capture users' photo continuously as a third person's view. Later on, users can glance through their photos using PukaPuCam Viewer. PukaPuCam records interactions between users and surrounding objects or people they meet. One of its features is that as balloon experience air resistance, it can change its inclination according to the user's speed. This promotes users' experience of recollecting records not normally taken. Unlike other similar devices, PukaPuCam uses one of the common design people are familiar with - a balloon; make it an interesting application at tourist spot. Since balloons are cute, we aim to give users more enjoyable, delightful experiences.

著者

須田千里 岩田秀行校注

出版者

岩波書店

巻号頁・発行日

2010

著者

熟 美保子

出版者

大阪教育大学歴史学研究室

雑誌

歴史研究 (ISSN:03869245)

巻号頁・発行日

no.49, pp.1-20, 2011

著者

河野二郎 編

出版者

旭興信所

巻号頁・発行日

vol.第1編, 1910

著者

Azusa Nishino Takashi Ichihara Takeshi Takaha Takashi Kuriki Hideko Nihei Kazuhisa Kawamoto Hiroyuki Yasui Takashi Maoka

出版者

公益社団法人 日本油化学会

雑誌

Journal of Oleo Science (ISSN:13458957)

巻号頁・発行日

pp.ess15118, (Released:2015-09-15)

被引用文献数

3 25

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The accumulation (incorporation) of paprika carotenoid in human plasma and erythrocytes was investigated. A paprika carotenoid supplement (14 mg/day) was ingested for 4 weeks by 5 young healthy volunteers (3 men and 2 women). After 2 weeks of carotenoid ingestion, the carotenoid levels in plasma and erythrocytes increased by 1.2-fold and 2.2-fold, respectively. Characteristic carotenoids found in paprika (capsanthin, cucurbitaxanthin A, and cryptocapsin) were detected in both plasma and erythrocytes. An oxidative metabolite of capsanthin (capsanthone) was also found in both plasma and erythrocytes.

著者

大原社会問題研究所 編

出版者

栗田書店

巻号頁・発行日

1944

著者

沢田吾一 著

出版者

富山房

巻号頁・発行日

1930

著者

[菅野覚明ほか執筆]

出版者

岩波書店

巻号頁・発行日

1996

著者

鈴木勝忠 石川八朗 岩田秀行校注

出版者

岩波書店

巻号頁・発行日

1993

著者

岩田 秀行

出版者

国際浮世絵学会

雑誌

浮世絵芸術 : 国際浮世絵学会会誌 (ISSN:00415979)

巻号頁・発行日

no.165, pp.73-79, 2013

著者

山岡 晶 風井 浩志 片寄 晴弘

雑誌

全国大会講演論文集

巻号頁・発行日

vol.第71回, no.コンピュータと人間社会, pp.721-722, 2009-03-10

著者

宮本 和徹 桑原 文夫

出版者

日本建築学会

雑誌

日本建築学会技術報告集 (ISSN:13419463)

巻号頁・発行日

vol.19, no.41, pp.101-106, 2013

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This paper describes the development of cast-in-place concrete piles at the dawn of Japanese foundation technology. The first cast-in-place concrete pile was <i>compressole pile</i> imported from France in 1907. The compressole pile was formed by dropping a hammer on the casted concrete in an excavated hole. Those piles installed at those days still exist in a number of historical buildings during more than 100 years. Following the compressole pile, <i>abbot pile</i> was introduced from the United States in 1910. The <i>abbot pile</i> is same manner to compressole pile, but using a casing tube to make a drilled hole.

著者

堀江 珠喜

出版者

日本比較文学会

雑誌

比較文学 (ISSN:04408039)

巻号頁・発行日

no.27, pp.p5-17, 1984

著者

羽根田文明 編

出版者

圭章堂[ほか]

巻号頁・発行日

1878