• Journal of the Korean Statistical Society
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• v.22 no.2
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• pp.209-217
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• 1993

The multicollinearity problem in a multiple linear regression model may present deleterious effects on predictions. Thus, its is desirable to consider the optimal fractions with respect to the unbiased estimate of the mean squares errors of the predicted values. Interstingly, the optimal fractions can be also illuminated by the Bayesian inerpretation of the general James-Stein estimators.

• 한국연소학회:학술대회논문집
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• 2014.11a
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• pp.185-186
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• 2014

The multi-environment probability density function model has been applied to simulate the turbulent stratified premixed flames. The direct quadrature method of moments (DQMOM) has been adopted to solve the transport PDF equation due to its computational efficiency and robustness. The IEM mixing model is employed to represent the mixing process and the chemical mechanism is based on Gri 3.0 mechanism. Numerical results obtained in this study are precisely compared with experimental data in terms of unconditional and conditional means for scalar fields and velocity fields.

• Sijohaknonchong
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• v.24
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• pp.113-137
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• 2006

This paper is a study on the Jeonwonsasiga of Shin Gye Young. Jeonwonsasiga is as a out of Sasiga-Line(사시가계) Yeonsijo(연시조), the singing Spring. Summer. Autumn, Winter and Jesuk. The meanwhile, a study on the Jeonwonsasiga is in the relations with other literary works, or a history of Siga in 17th century. A out of specific character's of Jeonwonsasiga is the singing Spring, Summer, Autumn, Winter and Jesuk about order. Jesuk with a New year's Eve, is the stand for a watch night.'Chun Ha Chu Dong(Spring, Summer, Autumn, Winter, 춘하추동)' are included in the Sasi of One Year(일년 사시), And the Jesuk is included in the Sasi of one day(하루 사시). Buy the way, Jeonwonsasiga make an equal about all of two. And then, this paper is focused on the 'Jesuk'. The role of Jesuk is coexistence together with the Sasi of One Year and the Sasi of one day. That is to say, Jeonwonsasiga's singing from the 1st works to the 8st works are the Sasi of One Year in the surface. But, singing the Sasi of One Day of 'Dan Ju Mo Ya(단주모야)' in the inside story. And Jesuk is a finished role the mean's of literary works. And this provide an opportunity which can be speaker's recognition of Jeonwon (전원). The Jeonwonsasiga of ten works are have a value of Yeonsijo in continyal structure. And so. it is to be watched sense of proportion of Yeonsijo in the 17th century.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.60-66
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• 2020

Torrential rain causes landslide damage every year. In particular, the 2011 downpour caused landslides at numerous points throughout Mt. Woomyeon, which resulted in considerable damage to people and property. Because it occurred in an urban area, this case became a major social issue and received public attention. Measures were quickly implemented for multilateral investigations and recovery. Landslides caused by heavy rain are greatly affected by rainfall at the time. Landslides from the upper part erode the flow path, increasing the size, causing much damage to the lower part. This study selected a rural village area among the damaged areas of Mt. Woomyeon, and analyzed the change in terrain profile before and after a landslide using the DSM data obtained from airborne LiDAR. This area can be divided into three hydrological basins. For each basin, the analysis was performed on the average slope of each part of the flow path, as well as the erosion and deposition due to soil flow. As a result of the analysis, it was estimated that the total amount of soil from the Jeonwon village was 15,300㎥. These field data based on GIS can be used as basic information to predict damage in the case of a similar disaster, and it can be helpful in analyzing the results of various debris flow simulations.