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ESTABLISHMENT OF ASSESSMENT SYSTEM FOR STRUCTURAL FLOOD CONTROL MEASURES

Tropical Cyclone Research and Review 2019年第1期8卷 46-52页

作者： CHO-RONG kim Department of Land Water and Environment Research Korea Institute of Civil Engineering and Building Technology

Due to abnormal weather environment such as global warming and greenhouse effect, the risk of flood has been increased with larger scale of flood damages. In this regard, it is needed to establish a comprehensive and integrated system to evaluate the most optimized measures for flood control through eliminating uncertainties of socio-economic impacts. Assessment System of Structural Flood Control Measures(ASFCM) was developed for determining investment priorities of the flood control measures and establishing the social infrastructure projects. ASFCM consists of three modules: 1) the initial setup and inputs module, 2) the flood and damage estimation module, and 3) the socio-economic analysis ***, the D/B for flood damage estimation was constructed, which is the initial and input data about the estimation unit, property, historical flood damages, and topographic and hydrological data in the target area were applied. After that, it is important to classify local characteristic for constructing flood damage data. Five local characteristics(big city, medium size city, small city, farming area, and mountain area) are classified by criterion of application(population density). Next step is the floodplain simulation with HEC-RAS which is selected to simulate inundation. Through inputting the D/B and damage estimation, it is able to estimate the total damage(only direct damage) that is the amount of cost to recover the socio-economic activities back to the safe level before flood did occur. The last module suggests the economic analysis index(B/C ratio) with Multidimensional Flood Damage. Consequently, ASFCM suggests the reference index in constructing flood control measures to reduce water-related damage and decision-makers can choose the proper flood control measures in the socioeconomic aspects.

关键词： ASFCM socio-economic assessment flood damage structural flood control HEC-RAS

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Estimation of Money Demand Function of South Korea Considering Regime Switching

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Chinese Business Review 2014年第12期13卷 740-756页

作者： Byung Woo kim Korea National University of Transportation Chungbuk Korea

The stability of money demand function is an important issue in macroeconomic policy implementation. Money demand of Korean economy was estimated. Cointegration test with time dummy variables results show that there is not only long-run equilibrium relationship between money demand and macroeconomic variables, but also structural breaks in this equilibrium relationships. Least squares, state-space, and Marcov switching methods show that there also has been instability （or regime shifts） of parameters in money demand, especially over 1997 crisis and the early 2000s. This fact implies that monetary policy for stabilization might encounter big problems due to change （instability） of money demand.

关键词： money demand function cointegration Marcov switching

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3D volume extraction of cerebrovascular structure on brain magnetic resonance angiography data sets

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Journal of Biomedical Science and Engineering 2012年第10期5卷 574-579页

作者： Do-Yeon kim Department of Computer Engineering Sunchon National University Sunchon Republic of Korea

The use of computers in facilitating their processing and analysis has become necessary with the increaseing size and number of medical images. In particular, computer algorithms for the delineation of anatomical structures and other regions of interest, which are called image segmentation, play a vital role in numerous biomedical imaging applications such as the quantification of tissue volumes, diagnosis, localization of pathology, study of anatomical structure, treatment planning, and computer-integrated surgery. In this paper, a 3D volume extraction algorithm was proposed for segmentation of cerebrovascular structure on brain MRA data sets. By using a priori knowledge of cerebrovascular structure, multiple seed voxels were automatically identified on the initially thresholded image. In the consideration of the preserved voxel connectivity—which is defined as 6-connectivity with joint faces, 18-connectivity with joint edges, and 26-connectivity with joint corners— the seed voxels were grown within the cerebrovascular structure area throughout 3D volume extraction process. This algorithm provided better segmentation results than other segmentation methods such as manual, and histogram thresholding approach. This 3D volume extraction algorithm is also applicable to segment the tree-like organ structures such as renal artery, coronary artery, and airway tree from the medical imaging modalities.

关键词： Cerebrovascular Structure Medical Image Segmentation Preserved Voxel Connectivity

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A Study on the Performance of Absorbing Boundaries Using Dashpot

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Engineering（科研） 2014年第10期6卷 593-600页

作者： Hee Seok kim Structural Engineering Research Division Korea Institute of Civil Engineering and Building Technology Goyang-si South Korea

In this paper an analytical study is carried out to examine the effectiveness of absorbing boundaries using dashpot. Validity of the absorbing boundary conditions suggested by Lysmer-Kuhle- meyer and White et al. is investigated by adopting the solution of Miller and Pursey. The Miller and Pursey’s problem is then numerically simulated using the finite element method. The absorption ratios are calculated by comparing the displacements at the absorbing boundary to those at the free field without the absorbing boundary. The numerical verification is carried out through comparison of displacement at the boundary.

关键词： Absorbing Boundary Dashpot Absorption Ratio

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Stability of Semi-implicit Finite Volume Scheme for Level Set Like Equation

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Communications in Mathematical Research 2015年第4期31卷 351-361页

作者： kim Kwang-il Son Yong-chol Ma Fu-ming School of Mathematics Jilin University Department of Mathematics University of Science

We study numerical methods for level set like equations arising in image processing and curve evolution problems. Semi-implicit finite volume-element type schemes are constructed for the general level set like equation （image selective smoothing model） given by Alvarez et al. （Alvarez L, Lions P L, Morel J M. Image selective smoothing and edge detection by nonlinear diffusion II. SIAM J. Numer. Anal., 1992, 29： 845-866）. Through the reasonable semi-implicit discretization in time and co-volume method for space approximation, we give finite volume schemes, unconditionally stable in L∞ and W1＇2 （W1＇1） sense in isotropic （anisotropic） diffu- sion domain.

关键词： level set like equation semi-implicit finite volume scheme stability

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The Education ＆ Training and the Utilization of Multi-cultural Workforce

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Journalism and Mass Communication 2016年第8期6卷 490-497页

作者： SU-WON kim Korea Research Institute for Vocational Education & Training Sejong-si Korea

The international movement of workers and the inflow/outflow of immigrants are increasing, the term immigrant communities which country in the world is more familiar. Also, the country that accumulated a history of immigration over decades have been promoted while continuously changing the integration policies for immigrants. The immigration into home country such as the married immigrant women, etc. is constantly increasing in South Korea that had a homogeneous culture. While, it is continued to the overseas movement of young people looking for opportunities in foreign rather than domestic. In South Korea, the multi-cultural families are increasing together with the immigration of foreign workers, the marriage immigrants, etc. in accordance with the globalization of capital and labor, and the multi-cultural society is being formed in accordance with the influx of alien culture and various religious. In this paper, it explored the trends and the future outlook for the multi-cultural workforce in these dimensions. Also, in a multi-cultural society, it suggested the implications and the future assignments for the new changes in the education ＆ training and the employment in order to improve the quality of life and to use as the production entities of multi-cultural workforce.

关键词： Multi-cultural workforce Education & training Utilization (Employment)

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腹主动脉瘤病因新探讨

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北京医学 2000年第6期22卷 360-363页

作者：徐东王京生万峰 M J West kim Summers Philip Walker 北京大学人民医院心外科邮政编码100044 Prince Charles Hospital

目的　证实家族性因素和遗传性因素在腹主动脉瘤 ( abdominal aortic aneurysm,AAA)发病中的作用。方法　 30 8例澳大利亚欧洲腹主动脉瘤病人和 110例健康对照组以及男女各 4 0例的新生儿对照组。对动脉壁四种重要结构蛋白基因进行等位... 详细信息

目的　证实家族性因素和遗传性因素在腹主动脉瘤 ( abdominal aortic aneurysm,AAA)发病中的作用。方法　 30 8例澳大利亚欧洲腹主动脉瘤病人和 110例健康对照组以及男女各 4 0例的新生儿对照组。对动脉壁四种重要结构蛋白基因进行等位基因分析。等位基因频率分析采用 Sham and Curtis方法。结果　 50例 AAA病人至少有一例直系亲属患有 AAA。在 539例存活的同代亲属中 ,14例查出 AAA,其中 12例已施行了手术治疗。对 74例同代亲属筛选发现 4例患有轻度主动脉扩张 ,6例患有中到重度主动脉扩张。女性病人与对照组之间及女性病人与男性病人之间 ,COL 1A2基因的等位基因频率具有统计学差别。结论　在本组病例中遗传性因素在 AAA发病中起着重要作用。 COL 1A2在男女 AAA发病中作用不同 ,其详细机制有待进一步探讨。

关键词：腹主动脉瘤遗传因素病因

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Hepatic vessel segmentation on contrast enhanced CT image sequence for liver transplantation planning

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Journal of Biomedical Science and Engineering 2013年第4期6卷 498-503页

作者： Do-Yeon kim Department of Computer Engineering Sunchon National University Sunchon South Korea

The structure and morphology of the hepatic vessels and their relationship between tumors and liver segments are major interests to surgeons for liver surgical planning. In case of living donor liver transplantation (LDLT), the most important step in determining donor suitability is an accurate assessment of the liver volume available for transplantation. In addition, the mutual principles of the procedures include dissection in the appropriate anatomic plane without portal occlusion, minimization of blood loss, and avoidance of injury to the remaining liver. It is essential first step to identify and evaluate the major hepatic vascular structure for liver surgical planning. In this paper, the threshold was determined to segment the liver region automatically based on the distribution ratio of intensity value;and the hepatic vessels were extracted with mathematical morphology transformation, which called hit operation, that is slightly modified version of hit-and-miss operation on contrast enhanced CT image sequence. We identified the vein using the preserved voxel connectivity between two consecutive transverse image sequences, followed by resection into right lobe including right hepatic vein, middle hepatic vein branches andleft lobe including left hepatic vein. An automated hepatic vessel segmentation scheme is recommended for liver surgical planning such as tumor resection and transplantation. These vessel extraction method combined with liver region segmentation technique could be applicable to extract tree-like organ structures such as carotid, renal, coronary artery, and airway path from various medical imaging modalities.

关键词： Living Donor Liver Transplantation Hepatic Vascular Structure Mathematical Morphology Image Segmentation

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Design of a Low-Power CMOS LVDS I/O Interface Circuit

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Journal of Energy and Power Engineering 2015年第12期9卷 1101-1106页

作者： Jeong Beom kim Department of Electronics Engineering Kangwon National University Chuncheon 24341 Republic of Korea

The paper presents the design and implementation of LVDS （low-voltage differential signaling） receiver circuit, fully compatible with LVDS standard. The proposed circuit is composed of the telescopic amplifier and the comparator with internal hysteresis. The receiver supports 3.5 Gbps data rate with 7.4 mA current at 1.8 V supply according to post-layout circuit simulations. The circuit has the power consumption of 13.1 MW. Comparing with the conventional circuit, the circuit is achieved to reduce the power consumption by 19.1% and the data rate by 14.3 %. The validity and effectiveness of the proposed circuit are verified through the circuit simulation with Samsung 0.18 μm CMOS （complementary metal-oxide-semiconductor） standard technology under the 1.8 V supply voltage.

关键词： Low-power circuit LVDS interface circuit CMOS high-speed circuit telescopic amplifier

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Proton-pump inhibitors for prevention of upper gastrointestinal bleeding in patients undergoing dialysis

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World Journal of Gastroenterology 2015年第16期21卷 4919-4924页

作者： Young Rim Song Hyung Jik kim Jwa-Kyung kim Sung Gyun kim Sung Eun kim Division of Nephrology Department of Internal MedicineHallym University Sacred Heart HospitalKidney Research InstituteHallym University College of Medicine Division of Gastroenterology Department of Internal MedicineHallym University Sacred Heart Hospital

AIM:To investigate the preventive effects of low-dose proton-pump inhibitors(PPIs) for upper gastrointestinal bleeding(UGIB) in end-stage renal ***:This was a retrospective cohort study that reviewed 544 patients with end-stage renal disease who started dialysis at our center between 2005 and *** examined the incidence of UGIB in 175 patients treated with low-dose PPIs and 369 patients not treated with PPIs(control group).RESULTS:During the study period, 41 patients developed UGIB, a rate of 14.4/1000 *** mean time between the start of dialysis and UGIB events was 26.3 ± 29.6 *** occurred in only two patients in the PPI group(2.5/1000 person-years) and in 39 patients in the control group(19.2/1000 person-years).Kaplan-Meier analysis of cumulative non-bleeding survival showed that the probability of UGIB was significantly lower in the PPI group than in the control group(log-rank test, P < 0.001).Univariate analysis showed that coronary artery disease, PPI use, anti-coagulation, and anti-platelet therapy were associated with *** adjustments for the potential factors influencing risk of UGIB, PPI use was shown to be significantly beneficial in reducing UGIB compared to the control group(HR = 13.7, 95%CI:1.8-101.6; P = 0.011).CONCLUSION:The use of low-dose PPIs in patients with end-stage renal disease is associated with a low frequency of UGIB.

关键词： Dialysis End-stage renal disease Pepticulcer Gastrointestinal hemorrhage Proton pumpinhibitors

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