• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.217-220
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• 2016

본 논문은 고공강하 훈련장치인 수직 풍동 장비의 현황 및 실내 스포츠로서의 활용방안에 대하여 논의하였다. 고공강하는 군의 특수낙하훈련이나 일반인의 스포츠 레저 활동으로 이루어지며. 극한의 스포츠를 즐기려는 사람들이 증가하하여 외국의 경우에는 활성화되어 있는 스포츠의 하나이다. 특히 북유럽 지역에서는 겨울에 실내 고공낙하를 위해서 사용할 수 있는 장비로서 수직 풍동이 사용된다. 수직풍동은 개방식과 폐쇄 회로형으로 개발되어 활용되고 있으며, 최근에는 놀이시설의 일환으로 회로형의 고가수직풍동이 많이 설치되는 추세에 있다. 수직풍동은 고공강하 체험 및 훈련을 위한 장비로서 미래에는 더욱 많이 이용되게 될 것으로 보인다. 극한 스포츠를 즐기려는 사람들이 증가하고 오락기구로서도 매력적인 장비이기 때문에 앞으로 국내에서도 이러한 시설의 설치 및 활용이 이루어질 것이다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.2
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• pp.83-90
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• 2018

This paper describes a case study on the design factor analysis of vertical wind tunnel for skydiver's training or experiencing of paradropping exercise in the air. The case study of vertical wind tunnel design is to provide the knowledges on effects of parameter's variation when it is applied to overall or partial duct of tunnel circuit. The analysis of design parameters based on pressure loss are produced one by one through the tunnel components from the flight chamber because the wind tunnel must satisfy the requirement of flight chamber such as flow speed, quality and quantity. Results shows the various effects of parameter variation with pressure loss in the wind tunnel circuit. Pressure loss should be based on the determination of fan and power system which can be selected from market or new design.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.1A
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• pp.16-22
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• 2006

This papers described with the analysis for electric Field strength on ground level transmitted from DMB transponder in stratosphere HAPS. It is compare with horizontal propagated ground wave. Resultly we confirm the equal strength a electric field on ground level between hish altitude vertical propagated wave and horizontal ground wave, also, is only 1W compare with terrestrial facility as transmitted output power for the DMB transponder in stratosphere HAPS. It is corresponding to 1Kw as same power value in ground propagated wave. Lastly it is new material wave source and also we concluding remarks as ubiquitous communication networking media.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.6
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• pp.61-69
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• 2008

In this paper, an automatic escalator system is manufactured for concentrate lighting efficiency and maintenance improvement technology of street light used a solar condenser. It can be linked with street light used a solar condenser, improved concentrate lighting efficiency by regulating concentrate light angle of a solar condenser. It can be remove and attach to solar condenser and street light. By developing street light used a solar condenser with an automatic escalator system, the lighting efficiency of street light and the concentrate lighting efficiency of solar condenser are High. The maintenance fee of street light significantly reduce and traffic congestion during working hours of street light is prevent.