• 한국조경학회지
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• 제25권3호
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• pp.186-198
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• 1997

Although Jaesil are historical products which is related to our traditional culture, they have not been studied extensively. This study deals with the location and the spacial compositional characteristics of Jaesil, a traditional building special functions in culture. The summarized results are as follows : 1) Jaesil wee constructed in 15c~20c. Jaesil in Kyungpook province were built by the intelligent classes in 17c~18c, while Jaesil in Kyungnam province were built by the rich farmer classes with economic power in 19c~20c. 2) The functions of Jaesil were the following : It was used for the purpose of worship, school, temple. The main function in Kyungpook province was worship, while the main functions in Kyungnam province were worship and school. 3) The relationship between Jaesil and villages were as follows : Jaesil in Kyungpook were located in the mountains apart from villages and their main elements of landscape were valleys or rivers . While Jaesil in Kyungnam was located in the residental spaces and their main elements of landscape were an artificial pond or no water landscape. 4) The plane form of Jaesil, Which was constructed specially 'The ㅁtype' of Jaesil were common in Kyungpook province and tis type expresses the enclosure and centrifugal force. While 'The 一type and 二type' were common in Kyungnam, and this types expresses the poenness and practicality.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 총회 및 춘계학술발표회
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• pp.222-225
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• 2001

In urban environments, the surface land impermeability fundamentally related to urban growth emphasizes the environmental problems such as the storm water peak flow (so-called the urban flooding) and the pollution. The conventional urban drainage system provides a number of temporary reservoirs intercepting and retaining surface-derived pollutants following their introduction to and deposition upon the impermeable surface. Gully-pots are common features in urban drainage systems in Korea, which were installed for draining rainwater to prevent regurgitation in rainy season and retaining larger particles, hence minimizing pipe blockage problems. When the road runoff conveying sediment enters a gully-pot, the sediment mixes with the gully liquor causing direct pollution of receiving waters. The characteristics of local sediment contamination are usually related to the types of land use activities that take place or have taken place within the area., This study was undertaken to evaluate the spatial and temporal variations of the contamination of gully-pot sediments in Seoul with respect to heavy metals such as As, Cd, Co, Cr, Ni, Pb, Cu and Zn. The heavy metal data were examined according to the land use type. In this paper, sampling sites in Seoul were divided into six groups (commercial area, industrial area, residental area, motor way, rural area, and local pollution).

• 한국전기전자재료학회논문지
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• 제24권12호
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• pp.1018-1022
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• 2011

Nowadays, with improvement of economical income and life qualities, life pattern changes have been brought such as increasing of avocational activities. Consequently, following those life trends, utilization of car is getting increased. Thus, the perceptions of car have been changed from the only means of transport in the past to a 2nd residental space. that is why the car's endo environmental factors are getting so important. Air conditioner regulating air ventilization in vehicle's indoor automatically sets the right temperature based on the differences of indoor and outdoor's temperature with development of advanced functions to provide better environmental qualities in vehicle. However, even those advanced techniques for functional development are got so diverse though, the essential technique for preventing the growth of bateria and mold inside of the air conditioner are not even severals. Especially, evaporator one of the vehicle air conditioning equipments generates cooled air by vaporizing refrigerant in liquid state with the water as the adduct for this reactions. It has structural difficulties for water vaporation then cause the growth of germs. That's why this reseach was focused on the way of eliminating germs in the vehicle air conditioner efficiently. Direct air sterilizer by using UVC(Ultraviolet C) is manufactured and that performances are evaluated.

• 자원환경지질
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• 제33권2호
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• pp.91-100
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• 2000

It has been more than ten years since Dukun mine was abandoned. Tailings of waste deposits and slime dumps in the abandoned Dukum mine have been left to be deserted for fifty years. The results of fifty years of neglecting are nothing short of major environmental problems. Slime dumps have been exposed to air and water in the mine over ten years and then soil profile has been formed well. Soil in the upper layer (A horizon) is the light gray color due to the leaching of cations. Soil in the lower layer (A2 horizon, 0.2∼0.3m)is tinted with reddish brown and yellowish brown color due to the development of iron oxides and iron hydroxides. Soil in the lower part of B horizon of (1.0∼3.0m) with the growth of copper and zinc oxides exposes to the bluish green, light blue, and dark gray. Ranging from 3m to 8m in depth, 85 samples were taken from 22 sampling sites with 50m intervals located on the slime dump area with hand auger and trench (open cut). As tailings was distributed, heavy metal elements extracted by the process of surface water and ground water move and disperse in to the hydrosphere. Waste dumps were distributed in and around the mine and water draining from those dumps be a potential source of contamination. Soils, thus, can be dispersed into downslope and downstream through wind and water by clastic movement. These materials may be deposited in another horizon if the water is withdrawn, or if the materials are precipitated as a result of differences in pH, or other conditions in deeper horizons. These were primarily associated with acid mine drainage. The characteristics and rate of release of acid mine drainage are influenced by various chemical and biological reactions at the source of acid generations. Prolonged extration of heavy metal elements has a detrimental effect on the agricultural land and residental area. Twenty soil samples were collected from the agricultural land in the area (0∼30 cm). Seventeen samples were also taken from the sediment in the stream running alongside the dumps. The dispersion patterns of heavy metal elements are as follows: The content of As ranged 2∼6 ppm in a horizon, 20∼125 ppm in B horizon with large amount of clay mineral is concentrated and the content of Cd ranged 1∼2 ppm in A horizon, 4∼22 ppm in B horizon. Like Cd, the content of As, Cu, Zn, Pb in B horizon is higher than that in A horizon (approximately 5∼100 times). When soil formation proceeds in stages, it is necessary to investicate the B horizon with the concentration of heavy metal and preventive measures will have to established.

• 환경생물
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• 제22권1호
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• pp.242-245
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• 2004

부산시 대천의 생물학적 수질판정을 하기 위하여 4개 정점에 인공부착기질을 설치하고 부착조류의 출현 특성을 조사하였다. 현존량의 상위 10%인 우점종은 정점 1과 2에서는 Cymbella ventricosa, Aulacoseira, granulata, Gomphonema olivaceum, Synedra ulna, Fragilaria intermedia로 나타났고, 정점 3과 4에서는 상기 4종과 더불어 Fragilaria intermedia 대신 Nitzschia palea로 나타났는데 모두 도심하천에서 주로 우점하여 출현하는 지표종이었다. 조사정점별로는 제1우점종의 현존량은 정점 1과 2에서는 Aulacoseira granulata가 각각 2,830 cells $ml^{-1}$, 2,030 cells $ml^{-1}$였고 정점 3에서는 Synedra ulna가 10,450 cells $ml^{-1}$, 정점 4에서는 Nitzschia palea가 23,470 cells $ml^{-1}$로 조사되어 오염원이 없는 지역에서는 우점종의 현존량이 거의 비슷하게 조사되었으나 오염원의 유입이 있는 지역에서는 우점종별로 현존량의 차이가 크게 나타났다. 또한 오염이 심하게 되었다고 생각되었던 지역에서는 강부수성 수역에서 출현하는 오염종인 Nitzschia palea의 현존량이 다른 종들과는 달리 두드러지게 많이 출현했음을 알 수 있었다. 오탁지수에 의한 수질은 정점 1에서는 1.49로 빈부수성 수역이었고 정점 2와 3은 각각 1.75, 2.40으로 $\beta$-중부수성 수역, 정점 4는 2.86으로 $\alpha$-중부수성 수역으로 조사되었는데 전체적으로는 2.12로 $\beta$-중부수성이었으나 부산 시민들이 많이 찾는 도시공원으로서의 기능과 역할을 생각해 볼 때 향후 도시민들의 출입이 잦아져서 오염을 가속화시킬 우려가 커서 오염방지에 많은 노력을 기울여야 할 것이다.

• Journal of Forest and Environmental Science
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• 제31권4호
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• pp.261-266
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• 2015

We investigated habitat characteristics of the yellow-throated marten Martes flavigula (Carnivora : Mustelidae) using geographic information system (GIS). GPS coordinates of the target mammal traces and seven habitat factors were used for the GIS analysis. The Odaesan National Park (ONP) is selected as a study area for GIS analysis of the habitat characteristics. According to the GIS analysis of whole area of ONP, main forest type was broadleaf trees which occupy 72% of forests. Trees of 4th to 6th age-calss account for 93% of the ONP forests. The mean elevation and slope of ONP was 901 m and $22.1^{\circ}$, respectively. According to the GIS analysis of M. flavigula habitats in ONP, most M. flavigula traces were found in borad-leaf forests and coniferous forests which are main forest types of ONP. In addition, the yellow-throated marten recorded a relatively high appearance rate of 7% in unstocked forests, which account for much less than 1% of the area of ONP. Most of the marten traces were found in forests with trees of 4th to 6th age-classes. The traces were found in the forest types in higher elevation (1,080.3 m) and lower slope ($15.0^{\circ}$) on average, compared with those of ONP. Appearance rate of the marten traces was 96% in range less than 600 m from the water. The traces were frequently found in areas far distantly beyond 1,400 m range from human residental areas and cultivated areas.