• Journal of Korea Water Resources Association
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• v.37 no.9
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• pp.781-787
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• 2004

The variation of channel bed which shows the complex hydraulic characteristics at channel junction was investigated by variation of discharge ratio and location of pier. As discharge ratio increase, the depth and width of erosion region become bigger to point of 63% of channel width in case of 1:0.5 discharge ratio. It was observed that the maximum scour depth at the point of 0.5 times of the channel width in the channel junction as 2.5 times bigger than straight channel. It means that the maximum scour depth at the channel junction is 2 times greater than by experimental formulas which are widely used in practical engineering, location of pier should be determined when it is installed in channel junction.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.31 no.9
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• pp.46-54
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• 2003

The purpose of this study is to analyze the phenomena of the thermally-induced vibration for the flexible space structure due to abrupt change of radiation heating circumstance using the numerical analyze and experiment test. In order to verify this structure, numerical approaches on the simplified flexible tube were compared with experimental test results at the ground experimental facility. In this analyze, it was found that the thermal deformation occurs firstly due to fast radiation heating of flexible structure and then the thermally-induced vibration would be induced due to small periodic change of temperature. According to comparison of numerical and experimental results, in case of no tip mass, the first mode vibration by the numerical analyze was a.78Hz same as that of the experimental result. However in case of increase tip-masses of 8g, 16g, 50g and 100g, the first modes vibration theoretical analyze were 1.75Hz, I.3Hz, a.87Hz and 0.73Hz, in decrease trend respectively and those by experimental test were 2.34Hz, 1.5Hz, 0.78Hz and 0.78Hz in decrease trend respectively. Although using the simpled equation for the estimation, the estimation results were similar to experimental results.

• Journal of the Korean Geographical Society
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• v.32 no.2
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• pp.155-174
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• 1997

This paper's main objective is to present an assessment of the impact of NAFTA on the economic structure of the Mexican northem borderlands. The NAFTA is the strategy of a free trade agreement with the United States and Canada, first mentioned by Salinas in June 1990 and established since January 1994. Mexican govemment permitted factories called maquiladoras at the northem borderlands for the first time in 1965. in the early 1980s Mexico was in a deep economic crisis and the international environment was adverse to Mexico. Mexico began to move toward an open economy and abandoned the import-substitution industrialization model that characterized Mexico since the 1930s. Through the new economic reform, the market system was preferred to the regulation; the private ownership, to the public ownership; and the competition, to the protection. The most phenomenal urbanization in northem Mexico has occurred around the major crossing points along the Mexico-U.S. border. The rapid urbanization in northern Mexico has been much due to the industrialization, brought about bv the maquiladora programs and, recently, by the NAFTA.

• Journal of the Korean Geotechnical Society
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• v.16 no.1
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• pp.43-50
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• 2000

In this paper, the consolidation efficiency and the equivalent diameter of the cross shaped drain are examined by using the laboratory test and the numerical model, and the results are compared with those of the band shaped drain. The equivalent diameter of the tested drains is back-calculated from the laboratory experiment and compared with those calculated from the formula suggested in the literature. The efficiency of the cross shaped drain is evaluated by using the 3-D flow program which was validated by the settlement-time test fill data. The results of laboratory test show that the equivalent diameter of the band shaped drain was close to the Rixner's formula and that of the cross shaped drain was fit to the following formula: $d_w\;=\; \\tarc{3}{4}.(b+t)$The results of the numerical analysis show that the cross shaped drain can reduce the consolidation time by 9-10% from that for the band shaped drain. The equivalent diameter obtained from the numerical flow model by using the field data is 3.5 times smaller than that obtained from the laboratory consolidation test.

• Journal of the Korean GEO-environmental Society
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• v.4 no.3
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• pp.51-59
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• 2003

Loading tests were carried out for model geocell to study the reinforcing effect by variation of tensile strength, cell height, soil density and embedded depth of geocell. From the result, it could be seen that the ultimate bearing capacity of the geocell system was influenced rather by the connection strength than by the tensile strength of geocell material. Bearing capacity increased with the increase of height to width ratio of geocell for the same relative density, strength and embedded depth. And the bearing capacity ratio(BCR) was higher at low relative density of sand than that of high relative density. The increase of bearing capacity was higher at geocell with high tensile strength than that of low tensile strength. And the influence was clear at higher relative density. Also the BCR was higher at shallow embedded depth of geocell. Without consideration of tensile strength of material, the application of bearing capacity formula suggested by Koerner seems not suitable for the special case with low tensile strength of geocell material.

• The Journal of the Korea Contents Association
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• v.11 no.9
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• pp.166-173
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• 2011

Asia has shown a tendency that a certain country's culture leads the fashion in turn every 10 years. The trend of Hong Kong movies in 1980's was called 'Hong Kong Wave', the trend of Japanese animation and games in 1990's was called 'Japanese Wave', and then the 'Korean Wave' began in the late 1990's. This term '~Wave(流)' is a Japanese-style term meaning '~way', '~style', '~group', and so on. In the same manner, recent popularity of Taiwanese TV dramas and a particular star that is in fashion in Japan are called 'Taiwanese Wave', and Chinese movies, broadcast, tourism, and etc. are called 'Chinese Wave'. Thus, the term 'Korean Wave' is a part of expression '~wave' used in Japan and it started to be used in the mean time, and was officially used in <韓流-Song from Korea>, a promotion record of Korean pop music, produced by Ministry of Culture and Tourism in Korea. In this paper I propose to correct the error of the term 'Korean Wave', and furthermore, to define a term expressing Korean culture and study for its usage.

• Journal of Korea Multimedia Society
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• v.9 no.2
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• pp.234-243
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• 2006

The recent rapid development of HCI and surveillance technologies has brought great interests in application systems to process faces. Much of research efforts in these systems has been primarily focused on such areas as face recognition, facial expression analysis and facial feature extraction. However, not many approaches have been reported toward face direction detection. This paper proposes a method to detect the direction of a face using a facial feature called facial triangle, which is formed by two eyebrows and the lower lip. Specifically, based on the single monocular view of the face, the proposed method introduces very simple formulas to estimate the horizontal or vertical rotation angle of the face. The horizontal rotation angle can be calculated by using a ratio between the areas of left and right facial triangles, while the vertical angle can be obtained from a ratio between the base and height of facial triangle. Experimental results showed that our method makes it possible to obtain the horizontal angle within an error tolerance of ${\pm}1.68^{\circ}$, and that it performs better as the magnitude of the vertical rotation angle increases.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.306-306
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• 2011

대상유역의 합리적인 홍수량 산정을 위해서는 풍부한 홍수자료를 바탕으로 직접적인 빈도해석을 적용하는 것이 가장 적정한 방법으로 알려져 있다. 하지만 국내의 대부분 유역은 관측된 홍수 자료가 제한적이고, 미계측 유역이므로 빈도해석을 통한 홍수량의 산정은 현실적으로 불가능한 실정이다. 이에 국내에서는 홍수량 산정에 대한 대안으로 강우-유출관계의 선형성을 가정한 집중형 강우-유출모형을 적용하고 있다. 하지만 집중형 강우-유출모형은 경험적인 공식에 의해 결정되는 수문매개변수의 비합리성 및 유역분할, 유역 하도추적의 구축방식에 따라 상이한 홍수량이 산정되는 문제점이 지적되고 있다. 따라서 최근에는 경험적이고 개념적인 집중형 유출모형을 지양하고, 격자체계를 기반으로 하고 있는 분포형 강우-유출모형의 연구가 활발히 진행되고 있는 상황이다. 본 연구의 목적은 남강 유역에서의 분포형 강우-유출모형 적용성 검증에 있다. 따라서 남강 유역 내에 발생한 4개의 호우사상을 선정한 후 강우 레이더 영상인 CAPPI영상 및 C-Max영상을 이용하여 면적강우량을 산정하였다. C-Max 영상을 이용하여 산정된 면적강우량은 지점강우를 이용한 면적강우량과 비교해 130%이상 과대 산정되는 경향을 나타낸 반면, CAPPI 영상을 이용하여 산정된 면적강우량은 10%이하의 오차를 나타내었다. 따라서 본 연구에서는 CAPPI 영상을 분포형 유출 모형인 VfloTM에 입력하여 유출을 모의 하였다. 모의된 유출곡선과 관측된 유출곡선을 비교 검토한 결과 80%이상의 높은 상관성을 나타낸 반면 첨두유출량 오차는 30%이상의 오차를 나타내었다. 하지만 강우보정기법인 G/R보정 기법을 적용한 후에는 첨두유출량 오차가 10%미만으로 감소하는 것으로 나타났다. 따라서 남강 유역에 분포형 유출모형을 적용하기 위해서는 다양한 강우 사상에 대한 지속적인 연구가 수행되어야 할 것으로 판단된다.

• Journal of Sasang Constitutional Medicine
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• v.10 no.1
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• pp.161-170
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• 1998

1. Purpose : This research is a study about constitutional diagnosis through the external appearances. especialy it is for finding shape differences of the upper-face pictures of moire, according to the Sasang constitution. 2. Method : We have collected 113 cases of patients of the Sasang Constitutional Department, including employees of the Kyung-Hee Medical Center and took pictures of moire of upper face and measured 50 points. We analyzed shape differences of the upper face according to the Sasang constitution. 3. Results : Analysing the moire of upper face, tile characteristics according to sasang constitution presented. 4. Conclusion : Soyangin had a projected part of left upper face compared with taeumin and soeumin, and taeumin had a projected part of right upper face. With the image of moire, the characteristics of upper face according to sasang constitution was found.

• Journal of Korean Ophthalmic Optics Society
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• v.20 no.2
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• pp.187-193
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• 2015

Purpose: This study was aimed to investigate effects of increased breath alcohol concentration (BrAC) which is the standard measurement of alcohol consumption in sobriety test under current laws on visual acuity and values of objective refraction. Methods: For twenty three males in 20s (average age $21.17{\pm}2.19$ years, body mass index (BMI) $22.09{\pm}2.16$) were selected. Distance and near visual test was performed at BrAC of 0%, 0.05% and 0.08%, and objective refraction with open-field auto-refractometer was also performed at different BrAC. Results: As breath alcohol concentration is increased, distance visual acuity was decreased, which was statistically significant, but near visual acuity was not changed. Also, values of objective refraction tended to be increased towards minus as breath alcohol concentration is increased. Conclusions: As breath alcohol concentration is increased, corrected visual acuity is decreased and refractive power is towards minus, it is necessary that visual acuity test and refraction measurement should be conducted under sober condition.