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연구논문 : 항공기 배출량 산정 방법에 따른 공항주변 대기오염 영향분석연구
한승재 ( Seung Jae Han ),유정우 ( Jung Woo Yoo1 ),임윤진 ( Yoon Jin Lim ),이순환 ( Soon Hwan Lee3 ),이화운 ( Hwa Woon Lee ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.12
Emissions from aircraft have impacts on the air pollution of airport and the surrounding area. There are methods of emissions calculated as Tier 1, Tier2, Tier 3A and Tier 3B. Thus, this study investigated emissions from aircraft at the Gimhae International Airport using EDMS(Emissions & Dispersion Modeling System) program. Results of estimation from aviation emissions, Tier 3B considering all parts which can occur at the airport has the largest amount emissions. In order to understand the relation between aviation emissions and distribution of ozone concentration over airport area, numerical evaluation were carried out. Although the difference of surface ozone distribution between numerical assessment with and without aviation emissions was little, effects of air pollution at airport area from aviation emissions of NOx and VOCs.
A Development of Motivation Scale of Sport Website Users
이순환(Soon Hwan Lee),최완용(Wan Yong Choi),신홍범(Hong Bum Shin),최형준(Hyong Jun Choi) 한국사회체육학회 2013 한국사회체육학회지 Vol.0 No.52
본 연구의 목적은 스포츠 웹사이트 사용자들의 동기척도를 U&G 이론 (Uses and Gratifications Theory)을 적용하여 개발하고, 인지적·정서적 태도에 관한 다양한 동기의 영향 및 스포츠 웹사이트 이용과 관련한 행동 의사의 영향을 살펴보는 것이다. 데이터 분석을 위해, 7점 척도로 구성된 22개 문항의 설문지를 이용, 총 505명의 설문응답을 확인적 요인분석과 구조방정식 모형으로 분석하였으며. 분석결과 각각 만족할만한 데이터 구성과 모형을 가진 것으로 파악되었다. 특히, 총 5가지의 동기요인 중, 4가지 동기 요인- 정보,상호작용, 오락, 경제- 에서는 인지적·정서적 태도에 유의미한 영향이 있었으나, 편의성 요인은 부정적인 영향을 가진 것으로 나타났다. 또한, 인지적 태도만이 스포츠웹사이트 사용과 관련, 긍정적인 영향을 미치는 것으로 파악되었다. 본 연구는 스포츠 웹사이트 사용자들의 동기척도를 개발하기 위해 U&G 이론을 적용한 첫번째 연구이며, 본 연구결과를 통하여 스포츠 웹사이트 관련 실무자들에게 구체적인 목표와 운영내용을 제시할 수 있다.
이순환(Soon-Hwan Lee),박명희(Myung-Hee Park),김해동(Hea-dong Kim) 한국대기환경학회 2008 한국대기환경학회지 Vol.24 No.1
In order to clarify the urbanization intensity of Daegu Metropolitan and its characteristics, comparative study on the variation of the cooling rate of two different sites was carried out using observation data for 40 years by Korea Meteorological Adminstration. Daegu Metropolitan and Chupungnyung represent well urbanized and rural areas, respectively. In comparison with Chupungnyung, yearly mean temperature at Daegu Metropolitan increases rapidly and especially the differences of minimum temperature increasing rate during 40 years becomes greater. These differences of regional warming are caused by the different urbanization intensity between two sites. And the impact of anthropogenic heat due to urbanization should be stronger in nighttime than in daytime. Sensible heat advection by regional wind during 6 hours from 18 LST contributes to atmospheric cooling. For this reason wind speed is in proportion to cooling rate of atmosphere. However, wind after 24 LST induces the warm air advection and makes decrease the cooling rate in urban area. Although the cooling rates between Daegu Metropolitan and Chupungnyung are some different, the variation tendencies of cooling rate of two site are almost same. Therefore atmospheric cooling rate in nighttime tends to be associated with the intensity of wind speed.
이순환(Soon-Hwan Lee),이화운(Hwa-Woon Lee),박순영(Soon-Young Park),김현구(Hyun-Goo Kim),강용혁(Yong-Heack Kang),김광득(Kwang-Deuk Kim) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
The purpose of this paper is to evaluate the wind energy resources with high spatial resolution in Sunghak Mountain in Busan metropolitan area under various atmospheric stability. Numerical model used in this research is A2C (Atmosphere to CFD), mainly applied on assessing regional scale and microscale meteorological phenformin. When the atmospheric stability become strong, wind run around mountain side. Since potential energy tends to be stronger at strong at that time, wake on lee side of mountain and variation of flow are induced naturally. On the other hand, cavity region at lee side of mountain tends to be occurred and expanded according to the decrease of atmospheric stability. Analysis on the wind energy distribution at several sites from numerical assessment confirmed quantitatively that wind resources at the top of the mountain is more suitable to establish wind energy complex than that in its slope.
연구논문 : 국지 기상 요소에 의한 태양광 발전량 변동특성에 관한 연구
이순환 ( Soon Hwan Lee ),김해동 ( Hae Dong Kim ),조창범 ( Chang Bum Cho ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.11
In order to clarify the characteristics of Photo-Volatic(PV) power generation over the Korean peninsula with complex terrain, special meteorological observation campaign was carried out for one year from 25 May 2011. Analysis is based on the comparison between observed meteorological elements and PV values generated at rated capacity 200 kW power plants. Solar radiation observed at 15° inclined surface is 11 % larger than that observed at horizontal surface due to low elevation angel of the sun during winter season. The PV power generation tend to be more similar the variation of inclined surface irradiance than horizontal surface irradiance. Increasing air temperature often induce disturbance of the PV power generation. However, the higher the air temperature in winter season, the higher PV power generation because the PV module may be more activated at higher air temperature. PV generating efficiency tends to be conversed the value of 15%.
원격 탐사 기반 해양 표면 온도의 미세 분포 차이에 따른 강설량 예측성 연구
이순환 ( Soon Hwan Lee ),유정우 ( Jung Woo Yoo ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.8
In order to understand the relation between the distribution of sea surface temperature and heavy snowfall over western coast of the Korean peninsula, several numerical assessments were carried out. Numerical model used in this study is WRF, and sea surface temperature data were FNL(National Center for Environment Prediction-Final operational global analysis), RTG(Real Time Global analysis), and OSTIA(Operational Sea Surface Temperature and Sea Ice Analysis). There were produced on the basis of remote sensing data, such as a variety of satellite and in situ observation. The analysis focused on the heavy snowfall over Honam districts for 2 days from 29 December 2010. In comparison with RTG and OSTIA SST data, sensible and latent heat fluexes estimated by numerical simulation with FNL data were higher than those with RTG and OSTIA SST data, due to higher sea surface temperature of FNL. General distribution of RTG and OSTIA SST showed similar, however, fine spatial differences appear in near western coast of the peninsula. Estimated snow fall amount with OSTIA SST was occurred far from the western coast because of higher SST over sea far from coast than that near coast. On the other hand, snowfall amount near coast is larger than that over distance sea in simulation with RTG SST. The difference of snowfall amount between numerical assessment with RTG and OSTIA is induced from the fine difference of SST spatial distributions over the Yellow sea. So, the prediction accuracy of snowfall amount is strongly associated with the SST distribution not only over near coast but also over far from the western coast of the Korean peninsula.