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http://dx.doi.org/10.7837/kosomes.2017.23.7.820

A Study on the Estimation of the Minimum Buoyancy for the Respiration of a Drowning Person  

Yim, Jeong-Bin (Division of Navigation Science, Mokpo National Maritime University)
Park, Deuk-Jin (Graduated School of Mokpo National Maritime University)
Kang, Yu Mi (Graduated School of Mokpo National Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.7, 2017 , pp. 820-828 More about this Journal
Abstract
Tools and equipment that can provide buoyancy for a drowning person are important for saving lives. The purpose of this study was to estimate the minimum amount of gas needed and the buoyancy value in newton units required to generate the minimum buoyancy determined to be sufficient for keeping the head of a drowning person above the water's surface to allow for respiration for at least 1 minute. A buoyancy experiment was carried out with a long rubber balloon injected with carbon dioxide gas, and a buoyancy measurement experiment was performed on six college students. The degree of buoyancy was measured using a 5-point scale, and the statistical value of the measured data was analyzed to estimate minimum buoyancy. As a result, 8 grams of carbon dioxide were determined to satisfy minimum buoyancy conditions with a confidence level of 72%, and buoyancy was calculated to be 44.66 newtons. 12 grams of carbon dioxide met the minimum buoyancy conditions with a confidence level of 100%, and buoyancy was calculated to be 66.99 newtons. This study is expected to contribute to the development of low cost, easy-to-carry minimum buoyancy aids.
Keywords
Drowning person; Life extension; Buoyancy; Rubber balloon; Carbon dioxide;
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