• Journal of the Society of Disaster Information
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• v.14 no.2
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• pp.122-129
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• 2018

Purpose : This study aims to seek out the risk of low-temperature burns and fire. Method : Hot vests are connected by higher voltage than walking voltage. Results : Accordingly, the possibility of low-temperature burns and fire was proved high. It was also shown that hot vests with relatively lower resistance on heat rays reached a higher temperature as the same voltage was applied. Conclusion : There are some problems with hot vests because they do not have any safety devices like a thermostat or a timer to prevent temperature increasing rapidly. For the purpose of reducing the risk of low-temperature burns and fire, setting the standard of the minimum resistance temperature and regulating the use of heat rays with lower resistance are necessary.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.473-478
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• 2015

In this paper, we suggest a flexible multiband antenna which can be equipped on an inflatable life-jacket. The antenna can send distress alert and location data of survivors to assist rescue operation when crew or people are in distress. The antenna operate in three frequency bands such as VHF-DSC band (156MHz), COSPAS-SARSAT band (406MHz) and GPS band (1,575MHz). The GPS band is implemented with a square ring-slot planar antenna, the COSPAS-SARSAT band and the VHF-DSC band antenna is implemented by monopole type. In order to give flexibility of substrate to be equipped on life-jacket, FR4-epoxy substrate of thickness 0.2mm is used to make antenna. The reflection coefficients of the fabricated antenna are -8.8dB, -20.4dB and -10.7dB at each bandwidth like VHF-DSC, COSPAS-SARSAT and GPS band, respectively, when people are wearing life-jacket integrated multiband antenna.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.786-787
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• 2023

대규모 행사에서 압사 예방을 위해 스마트 IoT 조끼 시스템을 개발했다. 일반 사용자들이 해당 조끼를 착용해 긴급 상황 발생 즉시 행사 관리자에게 정보를 전송하고 동시에 Linear Actuator를 활용해 개발한 에어백 기능으로 인명피해 사고를 보다 예방할 수 있다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.87-92
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• 2020

국민소득 증대, 개인 여가문화 확산 등으로 바닷가를 찾는 국민들이 늘어남에 따라 안전사고도 꾸준히 증가하고 있다. 이 연구에서는 연안사고 발생현황을 다각적으로 분석하고, 사고를 예방하고 인명피해를 줄일 수 있는 방법으로 개인안전장비인 구명조끼 착용의 중요성에 대해 연구하였다.

• Korean Journal of Legislative Studies
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• v.25 no.1
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• pp.117-129
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• 2019

• 한국생활과학회:학술대회논문집
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• 2010.05a
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• pp.129-130
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• 2010

• 한국생활과학회:학술대회논문집
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• 2010.05a
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• pp.131-132
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• 2010

• Korean Journal of Human Ecology
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• v.19 no.4
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• pp.667-674
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• 2010

This study evaluated the convenience and heating performance of 4 heated vests on the market through a trial of the vests. Participants were four healthy men who wore the garments outside in cold temperatures typical of the garments' real conditions of use. As the results, all the participants preferred the product, having an easily operable controller in ergonomic aspects and the good insulation for keeping the body temperature. The heating performance of vests was the most important factor in selecting the best product in this test. Indeed, the vests themselves found not to be sufficiently warm in the experimental condition. Thus, heated vests with the enhanced heating performance should be developed so that temperatures in the allowed range can be safely accessed.

• Journal of the Korean Society of Clothing and Textiles
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• v.25 no.1
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• pp.83-90
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• 2001

Cooling garments are being considered for reducing heat strain in hot environment. We evaluated the effectiveness of ice gel-based cooling vest in hot environment both resting and exercising. Four male subjects were exposed to heat(4$0^{\circ}C$, 50%RH) with vest or without it. The results were as follows; In case of the trial wearing ice gel-based cooling vest, total body weight loss, and local sweat volume were less than those without it. Mean skin temperature, rectal temperature, pulse, energy expenditure, temperature of inside clothes, and humidity of inside also were lower than those without cooling vest. By subjective thermal sensation, subjective humidity sensation, and thermal comfort sensation, it was proved that non-wearing vest decreased comfort than wearing that. These results suggested that wearing ice gel-based cooling vest reduced human heat strain in hot environment both resting and exercising.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.5
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• pp.455-462
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• 2015

In this paper, we suggested multiband antenna that can be equipped on a inflatable life-jacket, operating VHF-DSC band(156 MHz), COSPAS-SARSAT band(406 MHz) and GPS band(1,575 MHz) for search and rescue survivors quickly. The GPS band antenna was implemented with a square ring-slot planar antenna, and the COSPAS-SARSAT and VHF-DSC band antenna were implemented meander type dipole antennas. In order to place the antenna on a life-jacket, we installed it on 0.2 mm thickness FR-4 substrate to obtain a flexibility. It appeared that the antenna has -14.6 dB, -30.9 dB, and -18 dB return loss in COSPAS-SARSAT, GPS, and VHF-DSC band, respectively. In addition, its gain has 0.83 dBi, 2.1 dBi in COSPAS-SARSAT and GPS band, respectively.