• Journal of the Korean association of regional geographers
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• v.3 no.1
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• pp.35-50
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• 1997

The purpose of this research seeks to analyze the spatial variations in the sex age structure which have been shown to exist within the study atrea, the Kyonggi province in Korea. In this study it is desired to use the Age Structure Index developed by Coulson in order to describe thi sex age structure of each of 186 tracts that comprise the tracted portion of the Kyonggi province. The mechanics of computing the Age Structure Index are found in the equation describing a linear least squares trend line: y=a+bx. For each census tract, the percentage of the population in each age group(y) was plotted against the middle age of each age group(x). The a is a constant representing the value of y, when x equals zero. The b is the regression coefficient and is a measure of the angle of the slope of the least squares trend line. Thus the value of b is the Age Structure Index for each census tract. The major results of this investigation can be summarized as follows: The spatial distributions of sex age structures in the Kyonggi province are far from random. They have exhibited great regularity with the yonger sex age structures near Seoul and a sharp decline to the older sex age structures out in all derections towards rural region. The results of this investigation should have important general significance for the study of the Kyonggi province Age Structure Index is a flexible, operational definition shich allows sex age structure to be measured, mapped, and incorporated in a wide variety of methods of statistical analysis. Futurer, it has been demonstrated that sex age structure varies spatially within Seoul metropolitan finge and that this variation is relagfed to many other attributes of the population. Especially, Age Structure Index is strongly related to the variables-rate of population growth rate. density, rate of numbers of manufacturing, land price. At the same time, considerably more research is needed before a genmeral body of knowlege concerning sex age structure can be developed.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.309-310
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• 2001

휘발성 유기화합물(Volatile Organic Compounds; 이하 VOCs라 함)은 도시대기 중 광화학 스모그의 기인자인 동시에 발암성 혹은 돌연변이원성인 인체에 유해한 물질들이 많으므로 최근 들어 관심의 대상이 되고 있다. 이러한 VOCs의 발생원은 복잡ㆍ다양하지만 인위적인 주요 배출원은 유기용제와 자동차이다. 본 연구에서는 자동차 배출가스의 영향을 많이 밭고 있는 도시교통밀집지역의 VOCs의 출현양상 및 분포특성을 파악하고 도시교통밀집지역과 교통량의 영향을 비교적 적게 받는 교외 지역에서의 VOCs 분포특성을 비교해 보고자 한다. (중략)

• Journal of environmental and Sanitary engineering
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• v.21 no.1 s.59
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• pp.1-11
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• 2006

This study was to investigate concentration characteristics of atmospheric PCBs in soil sample and pine needle at rural area. Profiles of PCB congener detected in pine needle and soil sample have a difference that low molecular PCBs mainly existed in pine needle, whereas high molecular PCBs were mainly existed in soil sample because of their different vapor pressure and octanol-air partitioning coefficient($K_{OA}$) of each congeners. Correlation coefficients(r) of PCB congeners simultaneously detected in soil and pine needle were significant (r>0.71, p<0.01), which showed that PCB congeners patterns of atmosphere could be estimated in using pine needle and soil sample indirectly. The contributions(%) of higher molecular PCBs(>penta-CB) to total PCBs in soil sample were higher than those of pine needle and the contribution of lower molecular PCBs(

• Journal of Korean Society for Atmospheric Environment
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• v.18 no.3
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• pp.183-192
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• 2002

Concentrations of $\alpha$- and ${\gamma}$-hexachlorocyclohexane (HCH) were measured in ambient air samples at a two week intervals between July 1999 and February 2000 at Ansung, Kyonggi province. Their concentration levels averaged at 78 ($\alpha$-HCH) and 18 pg/m$^3$(${\gamma}$-HCH). Although the use of HCHs was ceased in South Korea since 1979, their residues are still present in air even after nearly 20 years. Given the composition of the two main HCH pesticide formulation (technical HCH antral lindane), the $\alpha$/${\gamma}$-HCH ratio in air is a useful indicator on the regional scale. The moderately low $\alpha$/${\gamma}$-HCH ration in this study indicates previous usage of both technical HCH and lindane. The relationship of temperature with gas-phase partial pressures was also examined using the Clausius-Clapeyron equation. Slopes generated by linear regression analysis between partial pressure (In P) and 1/T were considerably steep thor HCHs. It is thus suggested that their concentrations are controlled by re-volatilization processes from surfaces in the local surroundings of the sampling site.

• Journal of Environmental Science International
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• v.13 no.6
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• pp.505-512
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• 2004

This study was attempted to review the information data for minimizing the destruction of environmental naturalness and the visual damage of landscape from road construction by establishing a model of environmental naturalness for national roads in the suburb areas to suggest an answer to a research question, ' hat does decide the environmental naturalness of roadscape?'. We found that 1) The road-side slope showed no statistical significance in the description of environmental naturalness of roadscape, but the fact that the road-side slope from road construction is the destruction of natural topography cannot be overlooked. 2) In terms of the direction of value variations for independent variables, signboard and telegraph post, soundproofing and protection wall, structure, and building acted toward negative (-) direction, while mountains, sky, road trees, fields, and surrounding green including the road-side slope acted toward positive(+) direction. 3) The variable with highest relative contribution to dependent variables among independent variables is building, which has importance as many as 148 times of road-side slope, while the variable road-side slope has the least importance. Building has the importance of 7.22 times, mountains 5.51 times, road trees 2.59 times, surrounding green 2.54 times, structure 2.41 times, signboard and telegraph post 2.37 times, soundproofing and protection wall 2.20 times, and sky 1.32 times of the fields as a standard criterion values 1.

• Journal of Korean Association for Spatial Structures
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• v.5 no.4 s.18
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• pp.101-108
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• 2005

The investigations for mitigating wind-induced excitations of tall buildings have been carried out. The aerodynamic modification of a building shape changing the cross-section with height through tapering, which alters the flow pattern around the building, could reduce wind induced excitations of tall buildings. The fart that a tapered tall building might spread the vortex-shedding over a broad range of frequencies makes more effective for reducing acrosswind responses has been established. In this paper, to investigate the tapering effect for reducing wind-induced responses of a tapered tall building, high-frequency force-balance test was conducted. The six types of building models which have different taper ratio of 2.5%, 5%, 7.5%, 10%, 15% and one basic building model of a square cross-section were tested under the two typical boundary layers representing suburban and urban flow environment. The effect of wind direction was also considered.

• Journal of the Korean Solar Energy Society
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• v.34 no.1
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• pp.105-116
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• 2014

The objective of this study was to compare and analyze of radiation environment between downtown and suburban area by observation of short, diffuse and long-wave radiation during summer season. The followings are main results from this study. 1) The trends of long-wave radiation is increasing from May to August and the variation of daily range is decreased. It is confirmed that the temperature was closely relevant to long wave radiation. 2) During observation period, suburban area is higher than downtown the value of direct solar radiation. 3) There are much direct solar radiation in suburban area than downtown. But, it was measured much more horizontal solar radiation at the downtown area. From the this result, we can conclude that diffuse radiation play a important role at horizontal solar radiation.

• Journal of the Korean Solar Energy Society
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• v.33 no.4
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• pp.101-110
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• 2013

The propose of this study is to understand the phenomenon of radiation and comparison of analysis of two methods. One is analysis method of same-time data and the another is analysis method of rank data. We confirmed that two methods of correlation analysis had the effectiveness and suitability. The followings are main results from this study. 1) The seasonal correlation coefficient of long and short-wave radiation is higher in winter than in summer because of high humidity in the summer season can makes easily cloud in the sky locally. 2) According to analysis method, there is big difference in correlation coefficient from 0.494(Analysis method of same-time data) to 0.967(Analysis method of rank data) with short-wave radiation by the location during summer. These results have significant value in solar radiation research and analysis. It has explored a new way for solar radiation research of analysis method as well.

• Journal of the Korean Geographical Society
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• v.34 no.2
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• pp.193-193
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• 1999

1990년대에 들어와 전원주택시장은 급격하게 성장했다. 대도시 주민의 전원지향 이주와 전원주택시장의 급성장을 초래한 사회경제적 배경은 소비주체의 생활양식 변화, 건설자본의 사업환경 변화에 대한 대응, 국가의 법적·제도적 지원과 밀접한 관련성을 가진다. 실제로, 수도권지역에서 전원주택은 경관이 수려하고 자연환경이 잘 보존된 한강축, 접근성이 양호한 고속도로축, 일산 신도시에서 파주로 나아가는 북방축 등 세축을 따라 뚜렷한 성장세를 보인다. 그러므로 대도시 주민이 선호하는 전원주택의 주요 입지적 속성은 자연환경과 접근성이라 할 수 있다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.145-146
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• 2002

1960년 이전 대기 중 PCBs(polychlorinated biphenyls)의 유입은 여러 나라에서 다량으로 사용한 PCBs에 의해 많이 좌우되었다. 대기 중 PCBs의 최대 배출은 1960년대 후반이었으며 그 이후로 점점 감소하는 추세이다. 오늘날 이 화합물은 사용이 금지되었으며 대부분의 국가에서 법적인 근거를 마련하였다. 그러므로 최근 대기 중 PCBs의 발생원은 이전에 배출된 화합물이 재휘발(revolatilzation)한 결과라고 할 수 있다. 그러나 현재에도 PCBs가 포함된 설비를 사용하고 있으며, PCBs가 함유된 쓰레기가 여전히 환경중으로 배출되고 있는 실정이다. (중략)