• Journal of Korean Society of Forest Science
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• v.98 no.4
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• pp.472-478
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• 2009

Pine (Pinus densiflora) forests of 58 sites on the ridge of the Baekdudaegan, South Korea were classified by applying the phytosociological method and TWINSPAN. The floristic composition and life-form characteristics of the vegetation types analyzed and documented. The vegetation types were classified into five groups including four groups of Carex humilis var nana type and one group of Abies koreana-Sasa borealis type. Compositae was the most diverse family (26 species), Liliaceae (21 species), Rosaceae (18 species) and Betulaceae (11 species) whereas 27 families were represented by only one species. Taxonomically, Compositae was the most diverse (17 genera), Liliaceae and Rosaceae(12 genera) whereas 41 families were represented by only one genus. The Fagaceae was the most important family in total coverage (19.0) and followed Pinaceae (16.7) and Ericaceae (15.1). Five families such as Compositae, Liliaceae, Rosaceae, Betulaceae, and Umbelliferae contributed little to total coverage, although represented by numerous species. In the correlation between species richness and life forms, the species richness was highly correlated with growth and disseminule forms. In general, the correlation coefficients between life forms represented lower values than those between species richness and life-forms.

• Korean Journal of Social Welfare
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• v.39
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• pp.157-179
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• 1999

This study is an empirical research to analyze how many private income transfers in Korea decrease poverty rate, to compare the effects of private income transfers' decreasing poverty rate with income classes. This study has utilised the Family Income and Expenditure Survey to estimate the poverty ratio in urban areas and Unemployment Household Survey which Korea Institute for Health and Social Affairs has investigated at 1998. Majour findins are these. First, Sizes of private transfers incomes are much than that of public transfers incomes. The rates in receiving private transfers income are ten times higher than that in receiving public transfers income among urban worker's household. The mean of private transfer income are about six times larger than that of public transfer income among urban worker's household. Second, the effects of private income transfers' reducing poverty rates are not large. After private transfers, urbarn workers' households are about 10 per cent away from its poverty line, and unemploy households are only 3 per cent away from its poverty line. Third, especially, private income transfers are hardly reducing poverty rates among extreme poverty class. After private transfers, urban workers' households which their incomes are within low 5%, are not away from its poverty line at all.

• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.4
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• pp.443-448
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• 1992

We investigated characteristics of the taste components in traditional Korean soybean paste. The taste components in forty samples of the soybean paste were analyzed by gas chromatography, high pressure liquid chromatography and amino acid autoanalyzer and the taste of the soybean paste was investigated by sen-sory evaluation. The relationship between the taste components and sensory score was analyzed by the method of principal component analysis and stepwise multiple regression analysis. Characteristics of the traditional Korean soybean paste appeared to consist of sweet taste, palatable taste, saline taste, bitter taste and sour taste. They contribute to the characteristic taste with the contributing proportion of 25.97%, 17.84%, 8.58％, 7.79% and 3.12%, respectively.

• Proceedings of the Safety Management and Science Conference
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• 2000.11a
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• pp.195-198
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• 2000

IMF이후 건설 물량 감소에 대비하여 재해율은 증가 추세에 있고, 오히려 재해 강도율은 높아져 중대사고가 많이 발생하고 있는 추세이며, 건설업체에서는 안전관리에 대한 비용을 더욱 아끼려고 하고 있고, 비용 절감을 위해 재해예방을 위한 안전시설 비용이나 안전활동 비용을 투자하지 않고 있다. 따라서 본 연구에서는 노동부와 한국산업안전공단 및 재해예방 인력을 활용하여 안전 순찰 점검활동을 지원함으로서 각종 증대재해 위험요소를 사전에 제거함으로써 재해로 인한 손실을 최소화하여 국가 경제발전에 기여하고자 한다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.475-476
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• 2010

• Journal of the Korean Institute of Landscape Architecture
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• v.41 no.5
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• pp.38-45
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• 2013

Buffer green space in the residential area is a mechanism for improving the residential environment and also significant for residential life satisfaction and its various social roles. Accordingly, this study aimed to discover the effect of the buffer green space, which was established to minimize environmental influences of the residential environment, on residential life satisfaction. For this purpose, a survey was conducted on residents in Myeongji Residential Area where the buffer green space was installed, to examine the factors of the buffer green space and to analyze its causal relation with residential life satisfaction. The SPSS(statistical package for social science) 21 program was used for analysis and factorial analysis, correlation analysis and multiple regression analysis were executed. As a result, the roles of the buffer green space in Myeong-ji Residential Area included residential comfort, disaster protection, green space usability and environmental ecological property. In the overall accrued factorial contribution rate, residential comfort was very high with 40.54% out of total 62.48%. In addition, the residential comfort and green area usability had a higher correlation with residential life satisfaction. However, the significant level of disaster protection and environmental ecological property were 0.725 and 0.898, respectively, which were not significant as a preference factor in multiple regression analysis. Accordingly, the buffer green space for improving residential comfort and green space usability was confirmed to enhance residential life satisfaction.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.193-194
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• 2003

최근 대기오염물질에 대한 관심 증가는 대표적인 2차 오염물질로 분류되는 오존에 대한 관심과 미세먼지에 대한 특히 많은 관심을 초래하고 있다. 특히 미세먼지 중 탄소성 물질(carbonaceous material)의 경우, 기존 연구를 결과를 통해 살펴보면 지역적인 차이는 있으나 PM$_{2.5}$ 총 농도의 약 10~70%, 26~60%, 20~80%의 분율을 나타내는 것으로 알려져 있다. 또한 탄소성 물질은 시정 장애 현상등과 관련하여 중요한 대상물질임으로 국내외적으로 많은 관심을 유발하고 있는 물질이다. 국내의 경우, 시정 장애 현상과 관련하여 한진석 등(1994)이 원소분석기(elemental analyzer, Perkin elmer model 240)를 이용하여 분석을 실시한 바 있으며. 시정거리 5 km 미만시 탄소의 시정 기여율이 35.5%를 보고한 바 있다. (중략)략)

• Journal of Korean Society of Forest Science
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• v.100 no.2
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• pp.226-231
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• 2011

Ulmus davidiana var. japonica is a deciduous tree species used for traditional medicine. This study was conducted to investigate the variation of samara, seed, germination and growth characteristics among populations and among individuals within five natural populations of U. davidiana var. japonica distributed in Korea. The ten characteristics of samara and seed, the three germination behaviors as well as the two growth traits were studied in samaras collected from total 32 trees. Statistical analysis of all characteristics showed that there were significant differences among populations as well as among individuals within populations. In this study, the mean characteristics of this species were 13.0 mm in samara length, 9.7 mm in samara width, 1.37 in samara index, 0.015 g in samara weight, 3.07 mm in samara stalk length, 3.85 seed length, 2.66 mm in seed width, 1.46 in seed index, 1.29 mm seed thickness, 0.0062 g in seed weigh, 34.8% in germination percentage, 8.6 days in mean germination time, 3.5 ea./day in gemination rate, 37.7 cm in height and 4.90 mm in root collar diameter. Especially, coefficients of variations in samara weight, germination percentage, germination rate, height and root collar diameter were relatively high (${\geq}30.0%$) compared to other traits. There was no significant relationship between population association and geographical distribution. The results of principal component analysis for 15 characteristics showed that primary four principal components (PC's) explained 100% of the total variation. The first PC accounted for 41.8% of the variability which correlated with morphological traits, the second PC accounted for 32.9% of the variability which correlated with germination behaviors and the third PC accounted for 16.3% of the variability which correlated with growth traits.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2008.11a
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• pp.602-603
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• 2008

The design modification of problematic component in a given vibration path is disallowed in order to sacrifice other performances such as ride comport or handling of a vehicle. For this, the paper presents a new contribution analysis based on transmissibility ratio (TR) of acceleration in a definite vibration path to find a proper candidate for design modification. The new contribution analysis is based on the fact that the sensitivity of TR over a small design change is inversely proportional to the magnitude of TR. The new methodology can significantly relieve efforts of time-consumming modal analysis for detail modal information. The theory of proposed contribution analysis is simulated with five-degree-of-freedom open vibration path and confirms that the contribution result is well matched with the variance of TR over a dynamic change on a vibration path.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.04a
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• pp.311-314
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• 2016

본 논문에서는 가상네트워크를 활용하여 네트워크를 통해 악성행위를 하는 악성코드에 대한 동적 분석 결과 중 네트워크 발현율을 보다 향상시키고자 한다. 제우스 봇(Zeus Bot)의 특징과 네트워크 행위에 대하여 이해하고 봇(Bot)이 원하는 응답패킷(Response Packet)을 가상네트워크를 통해 제공함으로써 일반 동적 분석시 발현되지 않는 악성 행위를 발현시키고 네트워크 발현율을 보다 향상시킨다. 최종적으로 코드 커버리지(Code Coverage)를 넓혀 악성코드 유무를 판단, 예방 및 치료 대책을 마련에 기여한다.