著者

川﨑 規介 清水 健一 八木 光晴 高山 久明

出版者

公益社団法人 日本航海学会

雑誌

日本航海学会論文集 (ISSN:03887405)

巻号頁・発行日

vol.134, pp.52-57, 2016 (Released:2016-07-01)

参考文献数

12

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The Japanese boat “Wasen” uses “Ro-Scull” as a human-powered propulsion system. These traditional boats and propulsion system are almost vanished in Japan due to decrease in material Wood, and boat-builder’s aging. “Ro-Scull” is thought to be effective propulsive method compared to other human-powered boat such as canoe and cutter boat. In this study, we evaluate propulsive efficiency of “Ro-Scull” based on active metabolic rate (MR). We measured MR and metabolic equivalents (Mets) during “Ro-Scull”, Walking, and jogging exercise by using indirect calorimeter. MR and Mets during “Ro-Scull” exercise were nearly equal to walking ones. Energy conversion efficiency of “Ro-scull” was 12.3%. These suggest that propulsion efficiency of “Ro-Scull” is efficient, and its exercise can be done for a prolonged time as well as Walking. “Ro-Scull” exercise seems to be useful way to become familiar with maritime activities and seamanship.

著者

行平 真也 浦上 昌則 高山 久明

出版者

公益社団法人 日本航海学会

雑誌

日本航海学会論文集 (ISSN:03887405)

巻号頁・発行日

vol.134, pp.36-43, 2016

被引用文献数

1

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This study examines the reliability and validity of M. Urakami's self-efficacy scale of career decisions for university and college students on fisheries high school students. The study used a sample of 1,310 fisheries high school students, and the test questionnaire form used in this study was a 30-item scale. The results of the examination on factor structure, reliability, validity, and basic statistics of each item suggest that the scale can also be used for fisheries high school students.

著者

塩飽 朋之 Vivanda Modaso 高山 久明 清水 健一

出版者

公益社団法人 日本航海学会

雑誌

日本航海学会論文集 (ISSN:03887405)

巻号頁・発行日

vol.130, pp.50-54, 2014 (Released:2014-07-01)

参考文献数

8

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In the previous report, the authors examined the potential of transfer of the skill of working a Ro-scull to traditional Indonesian outrigger canoe (hereinafter just called canoe). Since the "Ro-scull" has been primarily used in traditional Japanese Wasen boat, it is difficult to apply Ro-scull directly to canoe with the hull form different from that of Wasen. The authors intended to find from image analysis the way of working a Ro-scull of canoe in comparison with Wasen and the suitable way of working that. The authors also intended to search the impact of varied skill level to work a Ro-scull on the introduction of working a Ro-scull to canoe from the comparison among testees with different skill level. In consequence, the following became apparent: (1) the motion of working a Ro-scull of canoe is smaller than that of Wasen since a testee could not plant its feet firmly on a canoe floor because of narrower breadth than Wasen; and (2) as for the difference of skill level, there was no clear distinction by testee because of the narrow range in which the blade apex of Ro-scull moved.