• KLA journal
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• v.10 no.7
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• pp.28-32
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• 1969

• KLA journal
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• v.19 no.1
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• pp.31-32
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• 1978

• KLA journal
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• v.22 no.2
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• pp.68-70
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• 1981

• The Journal of Engineering Geology
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• v.28 no.1
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• pp.11-24
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• 2018

The purpose of slope stability analysis is to predict the location and occurrence time considering the rainfall, topographic and soil characteristics, etc. In this study, infinite slope stability analysis considering the time distribution characteristics of the daily maximum rainfall was conducted using a model that combines a digital terrain model and a groundwater flow model. As the results of slope stability analysis, 69.1~70.0% of Fs < 1 cells are in the range of slope angle $20{\sim}50^{\circ}$ and Fs < 1 starts to appear in 2 hours for $Q_1$ model, 5 hours for $Q_2$, 7 hours for $Q_3$ and 6 hours for $Q_4$. Furthermore, the maximum number of Fs < 1 cells appear in 6 hours for $Q_1$ model, 12 hours for $Q_2$, 16 hours for $Q_3$ and 20 hours for $Q_4$, and the area of Fs < 1 is 14.3% for $Q_1$ model, 15.0% for $Q_2$, 15.6% for $Q_3$, and 16.3% for $Q_4$.

• Environmental and Resource Economics Review
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• v.31 no.2
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• pp.233-260
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• 2022

In this paper, we analyzed how oil price fluctuations affect stock price by industry using the non-parametric quantile causality test method. We used weekly data of WTI spot price, KOSPI index, and 22 industrial stock indices from January 1998 to April 2021. The empirical results show that the effect of changes in oil prices on the KOSPI index was not significant, which can be attributed to mixed responses of diverse stock prices in several industries included in the KOSPI index. Looking at the stock price response to oil price by industry, the 9 of 18 industries, including Cloth, Paper, and Medicine show a causality with oil prices, while 9 industries, including Food, Chemical, and Non-metal do not show a causal relationship. Four industries including Medicine and Communication (0.45~0.85), Cloth (0.15~0.45), and Construction (0.5~0.6) show causality with oil prices more than three quantiles consecutively. However, the quantiles in which causality appeared were different for each industry. From the result, we find that the effects of oil price on the stock prices differ significantly by industry, and even in one industry, and the response to oil price changes is different depending on the market situation. This suggests that the government's macroeconomic policies, such as industrial and employment policies, should be performed in consideration of the differences in the effects of oil price fluctuations by industry and market conditions. It also shows that investors have to rebalance their portfolio by industry when oil prices fluctuate.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.680-683
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• 2008

최근의 사전재해영향성 평가 등에서 많이 사용되고 있는 Huff 강우분포는 실제 호우사상의 적용성 보다는 최빈분위의 적용에 따라 특히나 재해 관련하여서는 홍수량이 크게 산정된다는 이유로 인하여 Huff 4분위를 채택하고 있다. 시간분포는 설계홍수량 수문곡선의 모양과 첨두홍수량에 많은 영향을 미치므로 신중하게 적용하여야 한다. 원칙적으로는 해당 지역의 과거 강우자료로부터 강우지속기간 동안에 총강우량이 시간이 경과함에 따라 어떻게 분포되었는지를 통계학적으로 분석하여 그 지역에 적합한 시간분포 모형을 작성하여 사용하여야 한다. 그러나 유출수문곡선에 영향을 미치는 점에 있어 분위별 강우 분포에 따른 손실율과 유출수문곡선과의 관계는 아직 연구가 부족하여 본 연구에서는 확률강우량의 시간분포 산정 방법 중 Huff분포를 이용하여 각 분위별로 유출수문곡선을 산정하였으며, 유효우량 손실과 유출수문곡선과의 관계를 비교 분석하였다. 강우의 손실율은 유출수문곡선의 상승부와 첨두전의 유출총량의 변화에 어떠한 영향을 미치는지 분석하였다.

• The Journal of the Korea Contents Association
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• v.17 no.9
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• pp.145-158
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• 2017

Lately, rapid increase of household debt and economic change has affected cash flow of household, insolvent risk has increased by high repayment burden of the principal and interest. Previous researches was progressing various discussion, composed objective repayment burden index about household debt. But it was relatively insufficient about perception of consumer. This research compare and analysis determinants of subjective repayment burden in household debt by income quintile, using 2016 Household Financial Welfare Survey. The research result is follows. The income 1 and 2 quartile groups have the higher monthly rent and credit card loan and the housing preparation loan ratio, the higher burden on repayment of the principal and interest. The Income 3 and 4 quartile groups have the higher 60s or older and member of household and real estate mortgage loan, the higher burden on repayment of the principal and interest. The Income 5 quartile group has the higher loan ratio for debt repayment preparation, the higher burden on repayment of the principal and interest.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.11
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• pp.7820-7830
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• 2015

Korean households' demand for food consumed away from home is on the steady increase. The ratio of eating-out expenditure of the household income, however, tends to decrease recently irrespective of income groups. This paper, therefore, aims to analyse the food-away-from-home expenditures of salary and wage earners' households by income decile group. The eating-out expenditure is modelled as a function of household income and then estimated using econometric methods such as regression, rolling regression, impulse response, and variance decomposition of forecast error. The regression results indicate that the higher the income decile group is, the lower the income elasticity of eating-out expenditure is, and the high income groups enjoy seasonal eating-out, the low groups do not. The coefficients of dynamic rolling regression are much smaller than those of static one, meaning that households tend to decrease the eating-out expenditure of their income. The impulse response analysis suggests that the eating-out expenditure increase of higher income groups lasts long relative to that of lower income groups. The variance decomposition, also, shows that household income plays much more important role in determining eating-out expenditure at the higher income groups than at the lower income groups.

• KLA journal
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• v.15 no.1
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• pp.20-23
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• 1974

편집자 주: 본 협회에서 1966년에 도서관용어집을 발간한바 있습니다. 그 후 날로 발전하는 도서관 및 봉사개념의 변화에 따라 지난 1969년 7월 본회 전문위원회 용어분위에서는 용어집의 개정을 결의하고 작업에 착수하여 그간 5차에 걸쳐 용어해설시안 초고를 발표한 바 있습니다. 이번에 다시 용어분위에서는 도서관과 관계된 용어를 조사 검토하여 우선 그 초고를 게재하는 것입니다. 이 원고를 읽으시고 좋은 의견을 당 사무국으로 보내주시기 바랍니다.

• KLA journal
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• v.14 no.11
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• pp.28-30
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• 1973

편집자 주 ; 본 협회에서 1966년에 도서관용어집을 편간한 바 있습니다. 그 후, 날로 발전하는 도서관 및 봉사개념의 변화에 따라 지난 1969년 7월 본회 전문위원회 용어분위에서는 용어집의 개정을 결의하고 작업에 착수하여 그간 4차에 걸쳐 용어해설시안 초고를 발간한 바 있습니다. 이번에 다시 용어분위에서는 도서관과 관계된 인쇄 분야의 용어를 조사 검토하여 우선 그 초고를 게재하는 것입니다. 이 원고를 읽으시고 좋은 의견을 당 사무국으로 보내주시기 바랍니다.