• Journal of Korea Water Resources Association
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• 제35권6호
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• pp.787-796
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• 2002

Hydraulic flood routing was performed for unsteady flow in a natural river using Preissmann scheme. A Log-Pearson Type-Ⅲ hydrograph is chosen arbitrarily as the upstream boundary condition and lateral inflow hydrographs for sensitivity analysis. For the application with an actual river system, upstream and lateral inflow hydrographs were estimated by the linear reservoir model and the Manning's equation was used as the downstream boundary condition. The unsteady flow model using the linear reservoir model as the inflow hydrographs was applied to Bochung stream basin and gives good results, and is approved to be used for the runoff prediction. As results of the sensitivity analysis, the proposed model may help to estimate the roughness coefficients when using the unsteady flow model with lateral inflow combined with the linear reservoir model.

• Journal of Korea Water Resources Association
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• 제35권6호
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• pp.693-701
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• 2002

In this study, one dimensional sediment movement numerical model(HEC-6) and semi-two dimensional sediment movement numerical model(GSTARS 2.1) were applied to solve the change of channel geometry in Bocheong stream. GSTARS 2.1 model was applied for the three selected sediment transport formulas(Ackers and White's, Engelund and Hanson, Yang formula) from 1993 to 2000 measured data on each section. The simulation results of Ackers and White formula for long -term bed changes are good when compared to the measured data. The HEC-6 model was applied for the simulation of one dimensional sediment movement for the same period. Comparison of the long-term simulations by GSTARS 2.1 and HEC-6 models with measured data shows that simulations by both models are in fair agreement with measured data in overall trend of the river bed changes. Comparisons of simulated cross sectional bed-elevations with measured data shows that GSTARS 2.1 model gives better agreement with than simulated results bed changes on the HEC-6 model.

• Transactions of the Korean Society of Mechanical Engineers B
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• 제41권2호
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• pp.125-133
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• 2017

This paper presents the inter-rater reliability of finger spasticity assessment tested realized by using finger simulator that mimics finger spasticity of patients after a stroke. For controlling the simulator torque, finger spasticity was modeled, and the model parameters were obtained by measuring quantitative data while grading based on Modified Ashworth Scale (MAS). A robotic finger simulator was designed for mimicking finger spasticity. Evaluation of this simulator with the help of seven rehabilitation doctors showed that the simulator had a Cohen's kappa value of 0.619 for Metacarpophalangeal Joint and 0.514 for Proximal Interphalangeal Joint. Fleiss' kappa between raters is 0.513 for Metacarpophalangeal Joint and 0.486 for Proximal Interphalangeal Joint. Therefore, the spasticity assessment made by MAS grade system is not reliable owing to the subjectivity of the assessment. The proposed robotic simulator can be used as a training tool for improving the reliability of the spasticity assessment.

• Journal of the Korean Society of Industry Convergence
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• 제3권4호
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• pp.319-327
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• 2000

In this study, the hydraulic characteristics variation of flood level caused by tree-planting condition in channel section is evaluated through the examination and analysis of back water characteristics in a natural channel within urban area where the improvement is completed. The study channel is Sinchun runs through the center of Taegu metropolitan city. For the analysis, the comparative examination of runoff characteristics depend on tree- planting condition performed for the flood level of the most upstream point, and velocity of study channel when the project flood flows according to three cases that existing channel is improved to the pro-natural channel, the roughness condition of both riverside highlands is changed, and the composition rate of trees in the riverside highlands is changed. It is known that the variation ranges of the flood level increase remarkably in general, and of the velocity decrease from the result of the examination for the hydraulic characteristics parameters at the most upstream point depend on the tree-planting condition of the channel section when the project flood flows. From the results of the above study on the variation of the hydraulic characteristics according to the tree-planting condition in channel section, it is known that the hydraulic characteristics when the project flood flows in channel have close relationship with the section properties and the slope of channel.

• Journal of the Korean Association of Geographic Information Studies
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• 제12권3호
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• pp.128-142
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• 2009

A lot of efforts have been made to resolve balancing problems between flux and source term and most finite volume models under development have been applied to simple channels such as imaginary and experimental channels. However, a number of numerical problems which can not be found in simple channels occur in the application to natural rivers and the problems should be resolved to apply finite volume models to natural rivers. In this study, 2D finite volume model which is applicable to natural rivers was developed and the accuracy of the developed model was validated through the application of partial dam break In addition, a simple and efficient 2D mesh generation method was suggested and the method can be accurately reflected to 2D mesh converted from surveyed cross sections in Han-river using GIS. The accuracy and applicability of the developed model on natural rivers were verified by performing simulation on Han-river using the generated mesh and comparing computed water elevation with measured water elevation.

• Proceedings of the Korea Water Resources Association Conference
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• 한국수자원학회 2011년도 학술발표회
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• pp.262-262
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• 2011

최근 들어 지구환경 변화에 따른 이상기후의 영향으로 태풍 및 집중호우로 인한 하천범람 등 홍수재해에 의한 인명과 재산의 피해가 급증하고 있다. 특히 한반도 지역에서는 집중호우와 태풍과 같은 이상강우로 인한 홍수피해의 발생이 매년 나타나고 있으며 홍수피해의 빈도와 강도는 증가하고 있는 실정이다. 이러한 상황에서 극심한 기상이변으로 인하여 발생되는 이상홍수의 예측에 관한 사항은 치수 이수는 물론 친수관점에서 볼 때 하천관리의 측면에서 매우 중요한 관심사로 부각되고 있다. 특히 홍수예측은 주민의 대피 및 통제, 시설물의 보호 등을 위해 충분한 선행시간을 확보할 수 있는 실시간적 관점에서의 홍수예측 및 관리가 중요하다. 기존의 수문학적 강우-유출 모형은 비선형성이 강하고 유역의 지형학적 인자와 기후학적 인자의 영향을 포함하기 때문에 정확한 예측이 어렵고 유출량을 계산하기 위한 유역추적, 저수지추적 및 하도추적의 각 추적과정에서 크고 작은 오차들이 발생하고 그것들이 누적되어 유출 모형의 해석 결과에는 많은 오차들이 포함되어 있다는 문제점이 있다. 또한 주로 유역 면적이 크고 홍수의 도달시간이 긴 대하천의 홍수예측에는 기존의 강우-유출 모형이 적당한 방법임에도 불구하고 유역면적이 작은 중소하천에 적용됨으로써 많은 불확실성을 포함하고 있으며 충분한 선행시간을 확보하지 못하는 문제점을 가지고 있다. 따라서 본 연구에서는 중소하천에서의 기존의 홍수예경보가 가지고 있는 문제점을 해결하기 위해 실시간 수위측정 자료 및 강우자료를 이용한 간단한 입력자료 만으로도 홍수예측이 가능한 뉴로-퍼지(Neuro-Fuzzy) 모형을 구축하여 충분한 선행시간을 확보함으로써 중소하천에서 의 실시간 홍수예측이 가능한 시스템을 구성하여 실시간으로 구동되는 효율적인 홍수예경보 시스템을 개발하고자 하였다. 임진강 유역을 대상으로 기존의 강우-유출 모형이 요구하는 유역의 물리적, 지형 자료 및 매개변수와 같은 광범위한 양의 자료를 배제하고, 유역의 강우 자료와 수위자료만으로 유역의 중요지점에 대한 홍수위 및 홍수량을 예측할 수 있는 뉴로-퍼지 모형을 구축하고 대상 유역에 적용하여 실측치와 비교 검증하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 한국수자원학회 2011년도 학술발표회
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• pp.290-290
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• 2011

수문모형은 여러 가지 기준에 따라 분류될 수 있으며 공간적 분포에 따라 집중형 모형과 분포형 모형으로 나뉜다. 한국건설기술연구원에서 개발한 CAT(Catchment hydrologic cycle Analysis Tool) 모형은 수문학적으로 균일하게 판단되는 범위를 소유역으로 분할하여 토지이용, 하도특성에 따라 집중형인 링크-노드 구성을 통해 침투, 증발, 지하수 흐름 등의 모의가 가능하며, 개발전후의 유출특성을 평가할 수 있도록 구성되어 있다. CAT은 다양한 물순환 개선 시설을 평가하고 사용자 편의 시스템을 제공하고 있으며 입력자료가 적고 지표수와 지하수의 상호작용 해석이 가능하다는 장점이 있다. 그러나 CAT은 개발 초기 단계로서 현재도 모형의 보정이 이루어지고 있기 때문에 다양한 검증이 요구되고 있다. 본 연구의 목적은 소유역에서의 강우-유출 특성을 평가하기 위하여, 대상유역을 선정하여 유역수문특성을 조사 분석하고, CAT 모형을 적용하여 장기 유출량을 추정하여, 그 적용성을 평가하는 데 있다. 대상지구는 경기도에 위치한 CAT 모형을 이용하여 소유역의 장기 유출을 모의하여 실측자료와 비교함으로서 모형의 적용성을 평가하는 데 있다. 대상지구는 경기도에 위치하고 있는 발안저수지 유역의 HP#6 ($3.84km^2$) 소유역을 선정하였다. 발안 저수지 유역은 경기도 화성시에 위치하고 있으며, 1996년부터 서울대학교 지역시스템공학과에서 수문/수질 모니터링을 실시해오고 있다. 대상유역의 기상자료 및 유역 특성자료를 바탕으로 모형의 입력자료를 구축하였고, 모형의 적용성을 평가하기 위하여 1997년과 1999년의 일 유출량 실측 자료와 CAT을 통해 모의된 값을 비교하여 보정하였고, 2000년 자료를 이용하여 검정을 수행하였다. 모형의 적용성은 모형의 보정과 검정에 대한 결과에 대한 통계적 변량을 이용하여 평가하였다.

• Journal of The Geomorphological Association of Korea
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• 제15권2호
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• pp.95-109
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• 2008

This work is to describe the geomorphological features of Dongcheon-gugok in the Eastern Part of Gyeongsang Province, and attempt to develop a basic data for traditional natural heritage. The bedrocks of the study area is typically sedimentary rocks of Gyeongsang Series. Dongcheon-gugok in the study area is almost distributed in the valley of Taebaek Mountain range in Gyeongbuk Province. These valleys almost belong to tributaries of Nakdong River, and are characterized by narrow meandering valley in the moutainous region. Dongcheon-gugok in the study area is located in these valleys with steep slopes or rocky cliffs. And there are pools, point-bar with sands and gravels, riffles, etc in the river valley. Ancesters named these landscape with Jeolbyuk(rocky cliff), Bong(peak), Dam(pool), Tan(ripple), Cheonsa(point-bar), Pok(waterfall), Dae(hill), etc.

• The Journal of Internal Korean Medicine
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• 제40권5호
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• pp.760-767
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• 2019

Objective: This study reports the efficacy of using integrative Korean medicine treatments for a patient with facial paralysis and accompanying trigeminal neuralgia. Methods: A 45-year-old male patient with left side facial palsy and facial pain due to Bell's palsy with trigeminal neuralgia was treated with herbal medicine, acupuncture, pharmacopuncture, and cupping for 18 days. The treatment effect was evaluated by measuring the scores for the numerical rating scale (NRS) of facial pain, the House-Brackmann scale, and the Yanagihara scale. Results: After the hospital treatment, the patient's facial pain NRS score was decreased, and the House-Brackmann scale and Yanagihara scale scores improved after the administration of the Korean medicine treatments. Conclusions: The integrative Korean medicine treatments appeared to be effective in treating facial nerve palsy and associated trigeminal neuralgia.

• The Journal of Internal Korean Medicine
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• 제40권5호
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• pp.841-850
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• 2019

Objective: The aim of this study was to report the effects of traditional Korean medicine as a treatment for the pain of a compression fracture in a patient with metastatic prostate cancer. Methods: A 60-year-old male patient with a compression fracture was treated with herbal medicines, acupuncture, and pharmacopuncture for 25 days. His chief complaints were severe low back pain, pain and numbness in both legs, and right groin pain. The effect of treatment was evaluated by the numerical rating scale (NRS) score for pain, the Oswestry Disability Index (ODI) score, and blood test results (CBC-diff count, CRP, ESR, etc.). Results: After 25 days of inpatient treatment, the patient's pain was controlled. The NRS and ODI scores were lower and most pathological symptoms had decreased. Conclusions: Traditional Korean medicine can be a solution for patients with compression fractures arising from metastasis of prostate cancer to the spine.