동기침법(動氣鍼法)을 이용한 요각통(腰脚痛) 환자(患者)의 임상적(臨床的) 고찰(考察)

이광호,권기록,강미숙,Lee, Kwang-Ho,Kwon, Ki-Rok,Kang, Mi-Suk 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.3

Objective : The purpose of this study is to observe the effects of Dong-Qi acupuncture treatment for the patients with low back pain and sciatica. Methods : 60 patients were divided into two, Group A of 30 persons and Group B of 30 persons. Only Group A was treated with Dong-Qi acupuncture treatment, Group B was treated with just Dong-Qi acupuncture treatment. Results : In VAS, Group A is $6.57{\pm}1.91$ and Group B is $5.20{\pm}2.22(P=0.013)$. In Improvement index, Group A is $0.2295{\pm}0.1036$ and Group B is $0.1545{\pm}0.0895\;(P=0.004)$. Conclusions : We knew that Dong-Qi acupuncture treatment is more effective.

사이버 안보를 위한 군(軍) 정보보호 전문인력 양성방안

이광호,김흥택,Lee, Kwang-ho,Kim, Heung-Taek 한국융합보안학회 2017 융합보안 논문지 Vol.17 No.2

The Cyberspace of the Republic of Korea Army is continuously threatened by enemies. Means for responding to such cyber threats are ultimately Military information security professional personnel. Currently, however, there are only a handful of advanced information security professional persons in Republic of Korea Army, and a lack of systematic training is inadequate. Therefore, in this thesis, we surveyed the information security professional human resource policies of USA, UK, Israel, and Japan. In addition, the policy to train professional human resources specialized in defense cyber security, we proposed training of specialist talent of 4 steps and medium and long term plan, step-by-step training system sizing, introduction of certification system. 우리 군의 사이버 공간은 적으로부터 지속적인 위협을 받고 있다. 이 같은 사이버 위협에 대응하는 수단은 결국 군(軍) 정보보호 전문인력이다. 하지만 현재 우리군의 고급 정보보호 전문인력은 소수에 불과하며 체계적인 양성계획은 미비한 상태이다. 따라서 본 논문에서는 세계 주요국인 미국, 영국, 이스라엘, 그리고 일본의 사이버 전문인력 양성정책을 조사하였다. 그리고 국내 정보보호 전문인력 양성정책을 조사하여 간략하게 제시하였다. 그리고 국방 사이버안보 전문인력 양성을 위해 4단계 전문인력 양성 및 중장기 계획 수립, 단계별 교육체계 정립, 인증제 도입을 제시하였다.

가정용 정화조에서의 포기효과에 관한 연구

이광호,정용선,하성룡,심순보 ( Kwang Ho Lee,Young Sun Cheong,Sung Ryong Ha,Sun Bo Shim ) 한국폐기물자원순환학회(구 한국폐기물학회) 1993 한국폐기물자원순환학회지 Vol.10 No.2

해안안벽과 육상구조물에서 지진해일파의 처오름 및 작용파력에 관한 수치해석

이광호,김창훈,김도삼,황용태,Lee, Kwang Ho,Kim, Chang Hoon,Kim, Do Sam,Yeh, Harry,Hwang, Young Tae 대한토목학회 2009 대한토목학회논문집 B Vol.29 No.3B

In this work, wave run-up heights and resultant wave forces on a vertical revetment due to tsunami (solitary wave) are investigated numerically using a numerical wave tank model called CADMAS-SURF (CDIT, 2001. Research and Development of Numerical Wave Channel (CADMAS-SURF). CDIT library, No. 12, Japan.), which is based on a 2-D Navier-Stokes solver, coupled to a volume of fluid (VOF) method. The third order approximate solution (Fenton, 1972. A ninth-order solution for the solitary wave. J. of Fluid Mech., Vol. 53, No.2, pp.257-271) is used to generate solitary waves and implemented in original CADMAS-SURF code. Numerical results of the wave profiles and forces are in good agreements with available experimental data. Using the numerical results, the regression curves determined from the least-square analysis are proposed, which can be used to determine the maximum wave run-up height and force on a vertical revetment due to tsunami. In addition, the capability of CADMAS-SURF is demonstrated for tsunami wave forces acting on an onshore structure using various configuration computations including the variations of the crown heights of the vertical wall and the position of the onshore structure. Based on the numerical results such as water level, velocity field and wave force, the direct effects of tsunami on an onshore structure are discussed. 본 연구에서는 Navier-Stokes방정식과 자유수면추적을 위해 도입한 VOF함수의 이류방정식에 기초하고 있는 CADMAS-SURF(CDIT, 2001)에 Fenton(1972)의 3차근사고립파이론에 의한 조파이론을 새롭게 도입한 수치파동수로로부터 직립호안상에서 지진해일(고립파)의 처오름 및 작용파력을 해석한다. 기존의 연구결과와 대비하여 본 수치해석결과의 적용성을 논의하며, 최소자승법에 기초하여 직립호안상에서 최대처오름과 최대파력을 합리적으로 추정할 수 있는 회귀식을 제안한다. 또한, 육상구조물에 작용하는 지진해일(tsunami wave)의 파력산정에 CADMAS-SURF(CDIT, 2001)의 적용을 시도한다. 육상에서 지진해일의 수위변동, 유속 및 파력변동의 특성으로부터 육상구조물에 미치는 지진해일의 직접적인 영향을 추론할 수 있을것이다.

Estimation in Autoregressive Process with Non-negative Innovations

이광호,박정건,Lee, Kwang-Ho,Park, Jeong-Gun Korean Data and Information Science Society 1992 한국데이터정보과학회지 Vol.3 No.1

In this paper, we obtain the natural estimators of the coefficient parameters and propose strongly consistent estimators of the parameter in the autoregressive model of order three with non-negative innovations. It is shown that the natural estimators are also strongly consistent for the parameters. We also compare the proposed estimators with the natural estimators and the least square estimators via Monte Carlo simulation studies.

3차원 불규칙 수치파동수조(3D-NIT) 모델의 적용성에 관한 연구

이광호,백동진,김도삼,Lee, Kwang-Ho,Baek, Dong-Jin,Kim, Do-Sam 해양환경안전학회 2012 해양환경안전학회지 Vol.18 No.5

In this study, 3D-NIT(3-Dimensional Numerical Irregular wave Tank) model in which regular wave as well as stable irregular wave can be generated in 3-dimensional numerical irregular wave tank was proposed. To verify validity, the following steps need to be conducted: 1) comparative analysis between calculated waveforms and targeted waveforms at the wave generating point, 2) comparative analysis with the existing experimental values of overtopping volume estimated, targeting shore protection structures installed on a slope bed, 3) comparison with the existing numerical and hydraulic experimental results through application in the analysis on the wave deformation by structures and wave force acting on the vertical cylindrical structures. Based on the results, characteristics of the breaking wave forces according to incident waves and interval distance of structures were identified through application of 3D-NIT model in the analysis on the breaking wave forces acting on the cylindrical structures installed on a slope bed, and reflection and overtopping was reviewed through application in the special breakwaters on the domestic fields. The numerical results obtained the 3D-NIT model are in good agreement with experimental results, and its applicaion to the complex-shpaed coastal structures is verified. 본 연구에서는 3차원수치파동수조에 규칙파뿐만 아니라 안정적인 불규칙파가 조파될 수 있는 새로운 조파시스템 3D-NIT(3-Dimensional Numerical Irregular wave Tank)모델을 제안한다. 그의 타당성을 검증하기 위하여 1) 조파지점에서 계산파형과 목표파형을 비교 검토하고, 2) 경사수심역에 설치된 호안구조물을 대상으로 산정된 기존 월파량에 대한 실험치와 비교 검토하며, 3) 연직원주 구조물에 작용하는 파력 및 구조물에 의한 파랑변형의 해석에 적용하여 기존의 수치 및 수리실험결과와 비교한다. 이상의 결과를 기초로 3D-NIT모델을 경사수심역에 설치된 원주구조물에 작용하는 쇄파력의 해석에 적용하여 입사파고, 구조물의 이격거리 등에 따른 작용쇄파력의 특성을 규명하고, 더불어 국내현장의 특수방파제에 적용하여 반사율, 월파량 등을 검토하였다. 그 결과 본 연구에서 제안하는 3D-NIT모델을 이용한 수치실험결과는 기존의 수리모형실험을 잘 재현하고 있음을 확인하였고 복잡한 형상을 갖는 해안구조물의 해석에 적용할 수 있음이 확인되었다.

소화조(消化槽)의 수리학적(水理學的) 체류시간(滯留時間)이 분뇨(糞尿)와 정화조(淨化槽)슬러지 혼합물(混合物)의 혐기성소화(嫌氣性消化)에 미치는 영향(影響)

이광호,양상현,Lee, Kwang Ho,Yang, Sang Hyun 대한토목학회 1983 대한토목학회논문집 Vol.3 No.3

본(本) 연구(硏究)에서는 분뇨(糞尿)와 정화조(淨化槽)슬러지 혼합액(混合液)을 2단(段) 혐기성(嫌氣性) 소화방식(消化方式)으로 처리(處理)할 때 제(第)1소화조(消化槽)(반응조(反應槽))에서의 수리학적(水理學的) 체류시간(滯留時間)(5일(日), 15일(日), 25일(日))이 반응조(反應槽)내에서의 화학적(化學的) 특성(特性)과 처리도(處理度)에 미치는 영향(影響), 그리고 제(第)2소화조(消化槽)(침전조(沈澱槽))에서의 적정(適定) 체류시간(滯留時間)을 검토(檢討)하였으며 그 결과(結果)는 다음과 같다. 1) 휘발성(揮發性) 산(酸)(volatile-Acid)은 HRT의 증가(增加)에 따라 감소현상(減少現象)을 나타냈다. 2) HRT가 증가(增加)함에 따라 알카리도와, Ammonia-N은 증가(增加)하였으며 pH는 짧은 체류시간(滯留時間)에서는 증가추세(增加趨勢)를 보였으나 15일(日) 이상(以上)의 HRT에서는 거의 일정(一定)하였다. 3) TBOD, TCOD, TS, VS의 제거율(除去率)은 HRT의 증가(增加)에 따라서 증가(增加)하였다. 4) 휘발성고형물(揮發性固形物)(VS)의 제거율(除去率)은 부하량(負荷量)이 증가(增加)됨에 따라 감소현상(減少現象)을 나타냈다. 5) 주입된 VS 단위(單位)무게당(當) gas 생산량(生産量)은 HRT 5일(日)에서 $0.33m^3/kg$ VS fed/day, HRT 15일(日)에서 $0.58m^3/kg$ VS fed/day, HRT 25일(日)에서 $0.57m^3/kg$ VS fed/day로 HRT 15일(日) 부근에서 가장 높았다. 6) 슬러지고형물(固形物)의 침전(沈澱)이 완료(完了)되는데 요구(要求)되는 시간(時間)(tu)은 8.6 일(日)이었으며 육안(肉眼)으로 관찰(觀察)된 고형물(固形物)과 상등수(上燈水)의 경계면(境界面)이 최종단계(最終段階)에 이르는 시간(時間)은 약(約) 10일(日)이었다. An experimental research was performed employing the two stage anaerobic digestion of the mixture of the nightsoil and septic tank sludge to determine the effects of various hydraulic retention time of the digestion on chemical characteristics and treatment effeciency, thus determining the proper retention time. Results of the research are as follows, 1. Volatile-acid decreased as HRT increased. 2. Alklinity and ammonia-N tended to increase as HRT increased as did pH values, however, were observed to be constant at higher HRT values than 15 days. 3. The removal efficiencies of TBOD, TCOD and VS increased as HRT increased. 4. The removal efficiency of volatile solid decreased as VS loading increased. 5. It was observed that the rates of gas production were: 0.33 with HRT of 5 days, 0.58 with HRT of 15 days and $0.57m^3/kg$ VS fed/day with HRT of 25 days respectively. It is believed that the highest rate of gas production was at HRT of 15 days. 6. The sludge settling experiment showed that the minimum settling time required to ensure the desired underflow concentraton was estimated to be 8.6 days.

수요반응자원이 포함된 전력시장의 쿠르노 경쟁모형 해석

이광호,Lee, Kwang-Ho 대한전기학회 2017 전기학회논문지 Vol.66 No.1

In order to reduce costs of electricity energy at periods of peak demand, there has been an exponential interest in Demand Response (DR). This paper discusses the effect on the participants' behavior in response to DR. Under the assumption of perfect competition, the equilibrium point of the electricity market with DR is derived by modeling a DR curve, which is suitable for microeconomic analysis. Cournot model is used to analyze the electricity market of imperfect competition that includes strategic behavior of the generation companies. Strategic behavior with DR makes it harder to compute equilibrium point due to the non-differential function of payoff distribution. This paper presents a solution method for achieving the equilibrium point using the best response function of the strategic players. The effect of DR on the electricity market is illustrated using a test system.

도시지역 주택용 호기성 정화조에 관한 연구

이광호,전덕환 ( Kwang Ho Lee,Deog Hwan Jeon ) 한국폐기물자원순환학회 1991 한국폐기물자원순환학회지 Vol.8 No.2

선로조류를 이용한 전력계통 동태 안전성 평가 연구

이광호,Lee, Kwang-Ho 대한전기학회 1999 전기학회논문지A Vol.48 No.2

This paper presents an application of artificial neural networks(ANN) to assess the dynamic security of power systems. The basic role of ANN is to provide assessment of the system's stability based on training samples from off-line analysi. The critical clearing time(CCT) is an attribute which provides significant information about the quality of the post-fault system behaviour. The function of ANN is a mapping of the pre-fault, fault-on, and post-fault system conditions into the CCT's. In previous work, a feed forward neural network is used to learn this mapping by using the generation outputs during the fault as the input data. However, it takes significant calculation time to make the input data through the network reduction at a fault as the input data. However, it takes significant calculation time to make the input data through the network reduction at a fault considered. In order to enhance the speed of security assessment, the bus data and line powers are used as the input data of the ANN in thil paper. Test results show that the proposed neural networks have the reasonable accuracy and can be used in on-line security assenssment efficiently.