• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 1993년도 가을 학술논문발표요지
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• pp.15-16
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• 1993

자연광 이용 식물공장의 주년 이용을 위해서는 하기주간의 냉방은 최대 과제중의 하나이다. 일반적으로 하기주간의 냉방방법으로는 냉동기(또는 냉수)에 의한 것과 세무의 증발냉각에 의한 것으로 나누어 볼 수 있다. 필자 등은 1992년 일본 식물공장학회지에 Heat pump를 이용한 냉수냉방과 세무냉방을 이용한 국소냉방의 주요 결과중의 하나는 세무냉방에서의 토마토 과실에 송풍한 구에서는 배꼽썩이가 방지되었고, 무송풍구에서는 55% 배꼽썩이가 발생되었다. (중략)

• 한국해양환경ㆍ에너지학회지
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• 제4권3호
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• pp.53-64
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• 2001

해수욕장은 여름철에 사람들이 쉽게 접근할 수 있는 해양성 리조트의 하나이다. 제주도 3개 해수욕장에서 해안공학적 기법을 사용하여 자연환경 조건과 해수욕객의 앙케이트 조사를 수행하였다. 또한 입경, 파고, 수온, 투명도, 해저경사 등에 관한 만족도가 조사되었다. 이 연구로부터 얻어진 결과는 앞으로 새로운 인공 해수욕장을 만드는데 이용할 수 있을 것이다.

• 한국환경과학회지
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• 제27권3호
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• pp.227-231
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• 2018

We studied the warming effect induced by Photovoltaic(PV) power plants in rural areas during summer daytime using a simple analytical urban meteorological model. This analysis was based on observed meteorological elements and the capacity of the PV power plant was 10 MWp. The major axis length of the PV power plant was assumed to be 1km. Data of the necessary meteorological elements were obtained from a special meteorological observation campaign established for a over a PV power plant. We assumed that the wind flowed along the major axis of the PV power plant(1 km). As a result, the air temperature on the downwind side of the PV power plant was estimated to invrease by about $0.47^{\circ}C$.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2006년도 총회 및 춘계학술발표회
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• pp.68-71
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• 2006

Seasonal fluctuation of groundwater level by pumping amount and stream discharge at the riverbank filtrate site adjacent to the Nakdong River in Daesan-Myeon was characterized. Groundwater level fluctuation shows increase in wet season (June, July, August and September) and decrease in dry season (the other months). Seasonal variation of pumping amount shows similar trend to the groundwater fluctuation due to higher consumption of potable water in summer. The relation of specific capacity, Nakdong River and pumping quantity was analyzed. The logarithmic relationship between specific capacity and the stream discharge gives high correlation coefficient, 0.96. This fact indicates that the increase of stream discharge rate reduces the rate of drawdown in the pumping area in wet season.

• 한국물환경학회지
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• 제20권4호
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• pp.352-356
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• 2004

Variations of water quality parameters were investigated for last 13 years in Han river. Deviation from 3 month moving average was suggested for the variation analysis. Many parameters of mainstream and tributaries showed similar monthly fluctuations. Suspended solid of mainstream showed higher fluctuation than that of tributaries due to summer flood. Contrarily, the organic parameters such as BOD, COD, and TN showed lower fluctuations in the mainstreams. The magnitude of deviation was in the order of pH < DO, COD, temp. < BOD, TN < TP, SS. Strong correlation was found in BOD data of adjacent sites. Main sites showed low deviation in comparison to adjacent common sites of mainstream (1:2.4). Mainstream showed low deviation in comparison to tributaries (1:1.7). Seasonal tendency of monthly BOD was confirmed using autocorrelation function. The deviation was in inverse proportion to the magnitude of BOD.

• 한국대기환경학회지
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• 제16권2호
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• pp.113-120
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• 2000

Effects of sea-salts on the properties of aerosol collected in a coastal region were studied by applying a gas-particle equilibrium model SCAPE to the measurement data from Korea Cheju Island in summer 1994. It was found that the observed higher ammonium concentrations in fine particles (PM2.5) than in TSP were caused by forced evaporation of ammonium in coarse fraction of aerosol by sea-salts and the degree of evaporation was quantified through an application of SCAPE. By subtracting the sea-salt fraction from the measured concentra-tions the changes of aerosol property were also studied. The concentrations of nitrate at both TSP and PM2.5 decreased when alkaline sea-salt fraction was removed from the measured data. Estimates of aerosol acidity increased for most samples with sea salt loadings, However in some cases with high mass fractions of sea-salt components the aerosol acidity of PM2.5 decreased slightly. This is though to be related with the formation of solid salt with the removal of sea-salts.

• 한국대기환경학회지
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• 제13권4호
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• pp.269-284
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• 1997

The ambient concentrations of gaseous and particulate phase ionic species and gaseous organic species in the Yochon industrial estate were measured during the spring ans summer of 1996. A three-stage filter pack sampler was used to collect particles and gaseous species, and stainless steel air sampling containers were used to collect air samples for organic species analyses. The concentrations of ions in aerosol wree comparable to those measured in Seoul. Aerosols measured were acidic, thus, most volatile acidic species were in the gas phase. The concentrations of organic species were highly variable, implying those were strongly dependent on the emissions of organic species from petrochemical plants. The concentrations of a few hazardous organic components were higher than those in Seoul or some populated areas in USA.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2011년도 추계학술발표대회 논문집
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• pp.208-213
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• 2011

In the former study, it is obtained that thermal storage effect of the apartment structure is the disadvantage to maintain comfort indoor thermal environment. However, because the thermal storage effect can be changed of its aspect in heating season, field measurement at the same apartment with the measurement in summer season was conducted in winter season. As results, thermal storage effect of apartment structure was the disadvantage in winter season, too.

• 한국대기환경학회지
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• 제22권3호
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• pp.361-371
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• 2006

This study examines ozone episodes occurred during the intensive sampling periods (Jun. 1-30, 2004) in the air of Seoul metropolitan area. During that period, there were 8 events (or days) in which 1 hr averaged ozone concentrations were greater than 100 ppbv. The photochemical analysis of ozone chemistry (i.e., budget and formation and destruction strengths of ozone) was carried out using a photochemical box model. Peaks in diurnal ozone variations during ozone episode periods occurred were concurrent with the sudden change of the slope of $NO_{2}/NO$ ratio, suggesting significant correlation with photochemical reactivity. In addition, the ozone peaks were concurrent with high concentrations of ozone precursors, peroxy radicals of $HO_{2},\;CH_{3}O_{2},\;and\;RO_{2}$. High ozone levels during the ozone episodes are likely to be affected by ozone destruction rate.

• 한국대기환경학회지
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• 제10권2호
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• pp.124-129
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• 1994

Aerosol size distribution was determined using Anderson sampler for the anions( sulfate nitrate and chloride ) and TSP. Ionic species concentration and size distribution have been investigated in the daytime and nightime individually. Size classified samples were extracted with distilled water and analyzed for C $l^{[-10]}$ , N $O_3$$^{[-10]}$ and S $O_4$$^{2-}$, by ion chromatography. The size distribution of these ions and TSP was analyzed to investigate the seasonal and diurnal variation of concentrations as follows: (1)Size distribution of TSP showed bi- modal type in the daytime, but indicated tri-mode distribution in the nightime without any seasonal variation. (2)Sulfate concentrations were higher in fine- mode both in the daytime and nightime but fraction of sulfate was higher in coarse-mode during the Yellow Sand Period. (3)Nitrate and Chloride ions are dominant in fine-mode in winter while dominant in coarse-mode in the summer.