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Ikeda Yukio

Affiliate Master Yamaguchi University

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A tide –generating force has two dynamic properties. One of them is a property as a vector with magnitude and direction, the other is a periodicity of force acting with a cycle of about 12 hours. If the tide-generating force is a periodic external force, the tides must be a kind of forced oscillation phenomena. Three proposals regarding the origin of tides will be suggested in this article. (1) The ocean tides can be divided into three types by the depth. They are ‘out of phase’ type (shallower than 22,000m), ‘in phase’ type (deeper than 22,000m) and ‘resonance’ type (equal to 22,000m). The actual ocean tides are classified into the ‘out of phase’ type. On the other hand, the Earth tides occurring on the solid Earth are classified into the ‘in phase’ type. (2) Dynamic movement pictures of each type of tides have been determined. Unlike the widely accepted explanation, the global form of the ocean surface repeats an oval and a circle in turn according to the Moon’s position. As a result, the tidal movements of the ocean will occur in fixed four areas with an angular distance of 90 degrees apart along the equator, and four spots escaping any tidal movements will appear between them. (3) A new concept of ‘tide burst’ is deduced and its scientific meanings are discussed. Judging from the delay of Earth’s rotation period, the tide burst will happen in the ocean about 4.5 billion years from the present.
Creators : Ikeda Yukio Publishers : Faculty of Education, Yamaguchi University
日本理科教育学会全国大会要項 Volume 61 pp. 191 - 191
published_at 2011-08-19
Creators : Tanaka Haruhiko Ikeda Yukio Obayashi Yoji Publishers : 日本理科教育学会
日本理科教育学会全国大会要項 Volume 61 pp. 190 - 190
published_at 2011-08-19
Creators : Kodama Ichiro Ikeda Yukio Publishers : 日本理科教育学会
日本理科教育学会全国大会要項 Volume 61 pp. 276 - 276
published_at 2011-08-19
Creators : Matsunaga Takeshi Ikeda Yukio Publishers : 日本理科教育学会
日本理科教育学会全国大会要項 Volume 61 pp. 275 - 275
published_at 2011-08-19
Creators : 池田 幸夫 松永 武 Publishers : 日本理科教育学会
日本科学教育学会研究会&日本科学教育学会中国支部研究発表会講演論文集 Volume 2010年 pp. 45 - 50
published_at 2010-05-29
Creators : Furuya Hiroshi Shiota Atsushi Iida Satoru Saiki Hideto Ikeda Yukio Publishers : 日本科学教育学会
Creators : Inoue Emi Ikeda Yukio Publishers : 山口大学教育学部附属教育実践総合センター
学部・附属教育実践研究紀要 Volume 4 pp. 165 - 172
published_at 2005-03
Creators : Nagahisa Machiko Migita Toshihiro Okada Takako Ikeda Yukio Watanabe Hideki Publishers : 山口大学教育学部附属教育実践総合センター
学部・附属教育実践研究紀要 Volume 2 pp. 37 - 42
published_at 2002-12-27
Creators : Ikeda Yukio Abe Hirokazu Waizumi Kenji Genda Tomoko Namikawa kazuoki Publishers : 山口大学教育学部附属教育実践総合センター