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이승목,박영원,Lee, Seung-Mok,Park, Young-Won 한국시스템엔지니어링학회 2009 시스템엔지니어링학술지 Vol.5 No.2
This paper proposes an effective method on the DFILS(Design for Integrated Logistics Support) in ammunition development applying QFD(Quality Function Deployment) method. The goal of this research is to define the Design for ILS approach at the start of the ammunition development and to yield a set of reusable requirements. Based on 000mm High-Explosive(Warship ammunition) development work, a QFD software tool, CUPID, was used to analyze and define the field force's requirements. Additionally, a set of reusable requirements are identified and defined for use during the Design for ILS development phase in the next-generation ammunition development process. These set of requirements that consider both the priority and importance of the VOC(Voice of Customer) will contribute to the early phase of the ammunition development to implement the Design for ILS specialty engineering effort.
이승목(Seung Mok Lee),최봉종(Bong Jong Choi),김근한(Keun Han Kim) 한국수처리학회 1998 한국수처리학회지 Vol.6 No.2
The removal of phosphate from wastewaters prior to discharge into natural water is an essential measure to prevent eutrophication in receiving waters. Phosphate removal through adsorbents, such as activated alumina, powdered aluminum oxide, activate red mud, flyash, blast furnace slag and other materials, is commonly and successfully practiced. The wasted sludge from seafood processing factory prepared on a laboratory scale has been used to evaluate its performance for phosphate removal. The material has been shown to be a good alternative adsorbent. As much as 90% phosphate removal by the prepared sludge is possible in about 20hrs under the test conditions. Phosphate removal is seen to increase with decreasing adsorbent particle size, increasing relative concentration of phosphate to sludge and increasing adsorbent dose. The removal efficiency is not precipitation dependent in these experimental circumstances.
이승목 ( Seung Mok Lee ) 한국물환경학회 1992 한국물환경학회지 Vol.8 No.3
A non-linear stochastic model is presented to describe the solute concentration profile over time in a batch process. The Langmuir-type non-linear isotherm was incorporated with the model to deal with adsorption. Model parameters were easily estimated by conducting batch experiments. The major advantage of this model is that the model calculations are simple unlike deterministic models which usually require the solution of partial differential equations. The model presented can be used satisfactorily in predicting rate curves for adsorption of trichloroethylene (TCE) on granular activated carbon (GAC) in batch reactor.
이승목 ( Seung Mok Lee ) 한국물환경학회 1993 한국물환경학회지 Vol.9 No.2
고정상 흡착반응기내에서 휘발성 유기화합물인 1, 1, 1-trichloroethane이 활성탄에 의해 제거되는 과정이 균질고체확산모델(homogeneous solid diffusion model)에 의해 성공적으로 예측되었다. 수학적 모델의 해를 구하기 위해서 등온흡착 파라미터들 뿐만 아니라 경막물질전달계수(film mass transfer coefficient) k_f와 표면확산계수(surface diffusion coefficient) D_s도 정의되어져야 한다. 평형자료들을 얻기 위해서 bottle-point 실험을 하였고 속도파라미터를 구하기 위해서는 간단한 회분식 실험을 하였다. 그리고 실험치와 예측치의 차를 최소화하여 회분식 반응시스템에서의 경막물질전달계수(k_(fb))와 표면확산계수를 구하였다. 고정상 흡착반응기를 위한 표면확산계수는 회분식 실험에서 얻어진 값을 이용할 수 있지만 경막전달계수는 독립적으로 구해야 한다. 따라서 고정상 흡착반응기를 위한 경막전달계수는 문헌으로부터 얻어진 상호관계를 이용하여 구하였다.
분자간의 상호간섭을 고려한 2성분계 흡착의 확률적 모델링
이승목,이주광 ( Seung Mok Lee,Ju Goang Lee ) 한국물환경학회 1996 한국물환경학회지 Vol.12 No.2
A Markov process coupled with interaction between molecules is developed to simulate bisolute adsorption kinetics. This model is relatively simple in that estimates of all model parameters except interaction parameters are obtained from single solute experiment. Transient behavior of molecules can be evaluated by analytically solving a system of the governing ordinary differential equations of the present stochastic model. Adsorption rate profile is not affected by interaction parameters at low concentration range.
이승목(Seung-Mok Lee),서현호(Hyun-Ho Seo),이승우(Seung-Wu Rhee),손준원(Jun-Won Son) 한국항공우주연구원 2008 항공우주기술 Vol.7 No.2
지식경제부 과제인 중형위성급 제어모멘트자이로 성능검증모델 개발 사업을 수행하면서 연구한 CMG 클러스터의 구동법칙에 대해 알아본다. 본 논문에서는 MP, SR, SR 탈출/회피 구동법칙에 대해 비교를 하고, 각 구동법칙의 성능을 시뮬레이션과 실험을 통해서 확인해보았다. In this article, we discuss steering laws for control moment gyro cluster, which have been studied on the project, "Development of control moment gyro engineering model for middle-size spacecraft", supported by Ministry of Knowledge Economy, Korea. We compare performance of MP, SR, SR Escape/Avoidance steering laws and check each law's performance by simulations and experiments.
Goethite 현탁액에서 유기산과 인산염의 경쟁적 흡착
이승목(Seung Mok Lee),최봉종(Bong Jong Choi),이태우(Tae Woo Lee) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.3
Competitive adsorption between phosphate and phthalic acid onto goethite was examined in single-sorbate and in binary-sorbate system to determine the extent of competition between phosphate and phthalic acid as a function of pH and ionic strength (0. 0l M NaCl). In order to compare the experimental data, MINTEQA2 program employing the diffuse layer model is used. This is important for a better understanding of the competitive binding of phosphate and phthalic acid in natural systems. Alkalimetric titration was used to characterize the surface acidity of the goethite. The surface acidity constants, pK^s_(a1) and pK^s_(a2), were 4.02 and 7.7, respectively. For phosphate and phthalic acid, typical anionic type of adsorption was noted, respectively. Also, in the binary-sorbate system, the amount adsorbed decreases with an increase in pH. In the experiments with simultaneous complexation of phosphate and phthalic acid, the complexation of phosphate was not influenced by the presence of phthalic acid. On the other hand, the complexation of phthalic acid was decreased by the presence of phosphate. These results suggest that phosphate can significantly influence the adsorption of simple organic acids in natural aquatic systems. Therefore less mobility of phthalic acid is expected than phthalic acid with complexation of phosphate in competitive condition.