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한태양,이화민,홍민,남윤영 순천향대학교 부설 산업기술연구소 2016 순천향 산업기술연구소논문집 Vol.22 No.2
In this paper, we developed a fire detection system using a low-cost thermal camera, and a smartphone application that interacts with a thermal camera. The developed system transmits both thermal videos and RGB videos to smartphones. The video data were analyzed by measuring temperature around candidate regions to detect fire. In order to evaluate the performance of the developed system, experiments were conducted with a smoke detector, a heat detector and a flame detector.
한태양,손유한,김상열,정현철,김현유,이상로,한준현,Han, Taeyang,Sohn, Youhan,Kim, Sangyeol,Jung, Hyun-Chul,Kim, Hyun You,Lee, San-ro,Han, Jun Hyun 한국재료학회 2018 한국재료학회지 Vol.28 No.12
We investigate the reduction of $SnO_2$ and the generation of syngas($H_2$, CO) using methane($CH_4$) and hydrogen($H_2$) or a mixed gas of methane and hydrogen as a reducing gas. When methane is used as a reducing gas, carbon is formed by the decomposition of methane on the reduced Sn surface, and the amount of generated carbon increases as the amount and time of the supply of methane increases. However, when hydrogen is used as a reducing gas, carbon is not generated. High purity Sn of 99.8 % and a high recovery rate of Sn of 93 % are obtained under all conditions. The effects of reducing gas species and the gas mixing ratio on the purity and recovery of Sn are not significantly different, but hydrogen is somewhat more effective in increasing the purity and recovery rate of Sn than methane. When 1 mole of methane and 1 mole of hydrogen are mixed, a product gas with an $H_2/CO$ value of 2, which is known to be most useful as syngas, is obtained.
Polar H7과 스마트 폰을 이용한 운동 모니터링 애플리케이션
한태양 ( Tae-yang Han ),김현호 ( Young-sun Kong ),공영선 ( Hyun-ho Kim ),하상호 ( Sang-ho Ha ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.1
비만이 사회적 문제로 대두되면서 운동에 대한 관심이 크게 증가하고 있다. 스마트 기기를 활용한 효과적인 운동 모니터링 및 관리를 위한 애플리케이션이 많이 개발되고 있다. 이러한 애플리케이션들은 운동 모니터링 및 운동 효과에 따른 칼로리 소모량 산출 기능을 제공하고 있으나, 운동시 실내와 실외를 구분하지 않는다. 그러나 실내와 실외 운동에 따른 칼로리 소모량은 다르게 산출되므로, 그 정확도가 떨어진다. 논문에서는 실내와 실외 운동으로 구분하고, 또한 Polar H7의 맥박 센서를 스마트폰에 연동하여 운동효과에 따른 칼로리 소모량을 정확하게 산출하여 보여주는 운동 모니터링 애플리케이션을 개발한다.
마이크로크기 액적의 거동 제어를 통한 액적-점핑 응축 성능 증진
한태양(Taeyang Han),최영현(Younghyun Choi),권정태(Jeong-Tae Kwon),조항진(Hang Jin Jo),김무환(Moo Hwan Kim) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
To increase the efficiency of jumping-droplet condensation, this study proposes a novel surface that promotes coalescence-induced jumping. Inspired the phenomenon in which a growing droplet moves spontaneously within a superhydrophobic V structure, we fabricated nanograssed zigzag structures on the surface to induce spontaneous motion of condensed droplets. The direction of the motion is parallel to the surface, so the condensed droplets easily coalesce on it. Compared to a conventional nanostructured superhydrophobic surface, the proposed surface increased the frequency of coalescence-induced jumping by ≥ 17 times and increased the cumulative volume of jumping droplets by ~ 1.8 times. The proposed surface has great potential to increase the efficiency of various applications that exploit condensation. Furthermore, we expect that the enhanced heat transfer coefficient of jumping-droplet condensation will solve thermal problem of high power electronics, which will be faced with commercialization of 5G.
증발-결정화 방법을 이용한 응축 성능 증진: 자기 배열된 친수성 결정의 효과
한태양(Taeyang Han),최영현(Younghyun Choi),김무환(Moo Hwan Kim),조항진(Hang Jin Jo) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Biphilic surfaces having heterogeneous wettability have proved their outstanding condensation efficiency compared to surfaces having homogeneous wettability. However the application of the biphilic surfaces in practical industries is limited due to the difficulty of the fabrication of the surfaces. In this study, we developed a simple and low-cost method to make a biphilic surface using evaporation-crystallization method. The developed surface enhanced the efficiency of condensation by up to 63% compared to a conventional superhydrophobic surface. Furthermore, the evaporation crystallization method induced ‘self-arrangement of hydrophilic crystals’ on a zigzag structured surface. The efficiency of condensation on the zigzag structured surface was increased by 2.4 times using the evaporation-crystallization method. The developed method not only enhanced the condensation efficiency of flat surfaces but also can be applied to complex shapes, increasing the applicability of biphilic surfaces in various industries.