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AN10079809-20100930-0001.pdf
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Download
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:2.2 MB
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:Feb 8, 2011 |
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Total downloads since Feb 8, 2011 : 1349
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| Title |
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An experimental study of the exponents in the power-law behaviors of rolling disks
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横山, 英祐
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ヨコヤマ, エイスケ
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Yokoyama, Eisuke
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| Affiliation |
慶應義塾大学法学部卒業生
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A graduate of Faculty of Law, Keio University,who took as an undergraduate the class of “Seminar in Natural Sciences” by Y. Shimomura inthe academic year 2009-2010.
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伊藤, ゆい
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イトウ, ユイ
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Ito, Yui
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慶應義塾大学法学部卒業生
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A graduate of Faculty of Law, Keio University,who took as an undergraduate the class of “Seminar in Natural Sciences” by Y. Shimomura inthe academic year 2009-2010.
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下村, 裕
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シモムラ, ユタカ
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Shimomura, Yutaka
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自然科学研究教育センター，慶應義塾大学日吉物理学教室
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Research and Education Center for Natural Sciences and Department of Physics,Keio University
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慶應義塾大学日吉紀要刊行委員会
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ケイオウ ギジュク ダイガク ヒヨシ キヨウ カンコウ イインカイ
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Keio gijuku daigaku Hiyoshi kiyo kanko iinkai
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2010
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慶應義塾大学日吉紀要. 自然科学
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The Hiyoshi review of the natural science
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48
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2010
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9
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1
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9
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| Abstract |
The dependence of the exponents in the power-law behavior of a rolling disk on its mass and on its aspect ratio, which is defined as the ratio of the diameter to the thickness of the disk, is experimentally studied with the help of a high-speed video system. The exponents overall do not depend so much either on the mass or on the aspect ratio of the disk. However, for relatively thick disks whose aspect ratios are smaller than 5, we find a tendency for the magnitudes of the exponents both of the inclinations angle and of the precession rate to increase as the aspect ratio increases, which means a thicker disk halts more abruptly than a thinner one. These results suggest that the air viscosity does not essentially contribute to the energy dissipation.
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| Departmental Bulletin Paper
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