• Journal of Korea Water Resources Association
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• v.38 no.12 s.161
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• pp.995-1008
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• 2005

In this study, the principal components of rainfall in Korea are extracted by a method which consists of the independent component analysis combined with the wavelet transform, to examine the spatial correlation between seasonal rainfalls and global sea surface temperatures (SSTs). The 2-8 year band retains a strong wavelet power spectrum and the low frequency characteristics are shown by the wavelet analysis. The independent component analysis is performed by using the Scale Average Wavelet Power(SAWP) that is estimated by wavelet analysis. Interannual-interdecadal variation is the dominant variation, and an increasing trend is observed in the spring and summer seasons. The relationships between principal components of rainfall in the spring/summer seasons and SSTs existed in Indian and Pacific Oceans. Particularly, the SST zones, which represent a statistically significant correlation are located in the Philippine offshore and Australia offshore. Also, the three month leading SSTs in the same region we strongly correlated with the rainfall. Hence, these results propose a promising possibility of seasonal rainfall prediction by SST predictors.

• The Korean Journal of Food And Nutrition
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• v.27 no.1
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• pp.105-111
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• 2014

The purpose of this study is to analyze the Korean chili (Capsicum annuum L.) ketchup and American chili ketchup for their comparative bioactive components and then conduct a sensory evaluation. American chili ketchups are collected from Americans' local favorites, and then the American chili ketchups and Korean chili ketchups are analyzed based on their physiological compositions. Bioactive analysis of the Korean chili ketchups show : total capsaicinoids of $2.59{\pm}1.00mg/100g$, total carotenoids of $33.28{\pm}1.52mg/100g$, total phenol of $61.17{\pm}8.08mg/GAE/100g$, and vitamin C equivalent antioxidant capacity (VCEAC) of $187.04{\pm}3.22mg/100g$. The Korean chili ketchups show higher overall acceptability when being compared to Americans' local favorite chili ketchups. In the sensory evaluation, there are significant differences (p<0.05) in sour, sweet, hot, salty taste, and the overall acceptability in two groups.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.22 no.1
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• pp.7-10
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• 1977

Positive correlations were observed between protein content and $\textrm{K}_2\textrm{O}$, protein and ash, protein and moisture content, and $\textrm{P}_2\textrm{O}_5$ and ash in soybean seeds. On the contrary, negative correlations were observed between fat and CaO, fat and ash, $\textrm{K}_2\textrm{O}$ and moisture content, CaO and moisture content, and MgO and ash content in soybean seeds.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1626-1630
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• 2006

본 논문의 목적은 설마천 시험유역을 대상으로 2005년의 신뢰성 있는 수문 수질자료를 바탕으로 유역의 유출거동에 따른 수질인자와의 상관관계를 분석하는데 있다. 시험유역에서는 10분 단위의 연속적인 우량 및 수위관측과 연간 30회 이상의 유량측정성과를 통하여 수위-유량관계곡선식을 개발하여 유량을 산정하고 있으며, 수질분석을 위한 시료채취는 유량측정시 현장에서 채취하여 실험실에서 분석하였다. 실험실에서 분석한 항목은 DO, BOD, COD, T-N, T-P, F, Cl, $NO_3-N,\;SO_4$, pH, 전기전도도로 총 11개 항목으로 수질측정은 우기가 시작되는 시기인 $6{\sim}9$월에 집중적으로 측정 분석하였으며, 강우가 시작되기 직전과 강우가 시작되어 유량이 증가되는 시기를 선정하여 각각 20회의 시료를 채취하여 분석하였다. 측정된 수질자료를 이용하여 2개 측정지점에 대한 각 항목간의 상관관계를 분석하였으며, 강우가 시작되기 직전과 강우기에 대하여 각 항목간의 상관분석을 수행하였다. 그리고, 선행강우의 일수에 따라 유출의 거동에 따른 BOD, COD, DO, T-N, pH의 농도변화를 비교 검토하였다. 2개 지점의 상관분석 결과는 오염물질간 상관성이 유사한 경향을 나타내었으며, 강우가 시작되기 직전과 강우기에 대한 각 항목간의 상관분석 결과는 유량은 전기전도도 항목과 상관도가 높게 나타났을 뿐 다른 항목은 없었으며, 수질항목간 상관도도 유기물질들 사이에서만 상관성을 나타내었다. 비강우기에는 질소성분의 항목과 전기전도도가 높은 상관도를 나타내었지만 강우기에는 유기물질과 질소성분의 항목간에 상관성이 있는 것으로 나타났다. 그리고, 선행강우의 일수에 따라 유출의 거동에 따른 BOD, COD, DO, T-N, pH의 농도변화를 비교 검토한 결과 선행강우일수가 클수록 전반적으로 DO, COD, BOD의 농도는 수문곡선의 형상과 비슷하게 증가 하였다가 감소하는 결과를 보이고 있으며, T-N은 선행강우일수가 큰 상태에서는 농도가 증가하였으나 선행강우가 작을수록 일정한 경향을 보이고 있다. 그리고, pH는 홍수기의 유량의 변화에 관계없이 일정한 값을 유지를 하고 있는 것으로 나타났다.

• Proceedings of the KSEEG Conference
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• 2001.04a
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• pp.100-103
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• 2001

• Journal of the Korea institute for structural maintenance and inspection
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• v.27 no.5
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• pp.16-22
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• 2023

In this study, a salt water immersion test was performed on concrete specimens simulating the concrete mix design of the nuclear power plant, and the correlation between the amount of chloride and the XRF component according to the depth of the concrete was analyzed. The amount of chloride on the surface of the nuclear power plant concrete increased slightly with increasing immersion time in salt water, but the amount of chloride in the depth of 5.5 mm or more showed a clear tendency to increase with increasing immersion time in salt water. As a result of analyzing the correlation between the amount of chloride in concrete and the XRF component, the concrete with 20% FA substitution compared with the OPC concrete showed a very high correlation between the composition ratio of Cl ions and the evaluation result of salt damage resistance by XRF component analysis. Accordingly, it was confirmed that chlorine ion analysis and salt damage resistance performance evaluation by XRF component analysis were possible through repeated data accumulation in the nuclear power plant concrete mix with 20% fly ash replacement.

• Journal of The Korean Society of Grassland and Forage Science
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• v.25 no.3
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• pp.169-176
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• 2005

To evaluate the possibility of predicting a specific nutrient component, which nay be difficult in analysis, from a component of nutrient relatively easy to analyze, six grass roughage sources (bermuda grass hay, klein grass hay, oat hay, orchard grass straw, tall fescue straw and timothy hay) mainly used in Korea were analyzed for the heat-stable $\alpha-amylase$ treated neutral detergent fiber (aNDF), acid detergent fiber (ADF), acid detergent lignin (ADL), neutral detergent insoluble crude protein (NDICP) and acid detergent insoluble crude protein (ADICP) as well as proximate analytical components, and correlation coefficients between nutrient components were calculated. Some chemical components appeared to have significant correlation (p<0.05) through Pearson's correlation coefficients (i.e. between crude protein (CP) and NDICP in oat hay, orchard grass straw and tall fescue, between CP and ADICP in oat hay and timothy hay, between crude fiber (CF) and aNDF in klein grass hay, tall fescue straw and timothy hay, between CF and ADF in oat hay, tall fescue straw and timothy hay, and between CF and ADL in orchard pass straw and timothy hay). It is therefore suggested that it would be worthy to predict a specific nutrient component, which may be difficult in analysis such as aNDF, ADF, ADL, NDICP and ADICP, from a component of nutrient relatively easy to analyze such as CP and CF. However, it would be needed to improve the correlation coefficients, more samples should be measured.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.322-323
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• 2000

국제적으로 많은 관심을 끌고 있는 환경오염중의 하나가 바로 산성 강하물에 관한 것으로 산성비의 피해는 광역적이기 때문에 많은 측정망들을 중심으로 한 공간적인 연구가 필요하다. 국내에서는 산성도 및 주요 이온성분의 분석, 대기질-강우 산성도의 관계, 지역별 강우의 화학적 성분 비교, 이온 성분간의 상관관계 분석 등에 대한 다양한 연구가 이루어지고 있다. (중략)

• Journal of Ginseng Research
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• v.26 no.4
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• pp.206-212
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• 2002

Ginsengs grown fur six years at different locations were harvested and prepared for white and red ginsengs. These fresh, white, red, and other ginsengs purchased from domestic and foreign countries were analyzed for their volatile compounds by solid phase microextraction-gas chromatography (SPME-GC) and SPME-GC/mass spectrometery (MS). The intensity of the ginseng volatiles perceived by nose was also measured in order to correlate the intensity with the corresponding GC analysis. Good correlations were obtained between the GC peak area and the degree of intensity evaluated by sensory panelists, indication that a reliable and objective evaluation of the aroma intensity of ginsengs by a simple GC analysis is possible.

• Korean Journal of Food Science and Technology
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• v.36 no.6
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• pp.919-923
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• 2004

Effects of adding 0, 2, 4, 6, and 8% freeze-dried kimchi powder (FDKP) on kimchi snack quality were examined. Headspace volatile compounds of 4% FDKP snack, receiving highest overall preference in sensory evaluation results, were analyzed, and 26 compounds were identified, including 13 aldehydes, 3 sulfides, a ketone, an acid, a terpene, and 7 other compounds. Pearson correlation analyses were carried out to determine a correlation between the concentration of FDKP and the amount of each volatile compound. Acetaldehyde, propanal, dimethyl sulfide, dimethyl disulfide, acetic acid, and d-limonene showed correlation coefficients above 0.90; selective ion move (SIM) analysis also showed above 0.97 for highly correlated compounds. Results suggest that these compounds can be used as indicators fur kimchi flavor of FDKP snack.