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연속열역학을 이용한 다성분 혼합물의 기 - 액 상평형 계산
김선욱,노호규,김한식 ( Sun Wook Kim,Ho Kyu Rho,Han Sik Kim ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.6
Continuous thermodynamics is adopted in order to calculate the vapor-liquid equilibria of multicomponent mixtures and the results are analyzed by applying to n-alkanes, aromatic oils and lemon oil mixtures extracted with supercritical carbon dioxide. In this work the mixtures are treated as semi-continuous whose distribution variable for the continuous fraction is normal boiling temperature. The vapor-liquid equilibrium calculations are performed using the Soave-Redlich-Kwong(SRK) and the Peng-Robinson(PR) equations of states by defining one continuous fraction for n-alkanes and aromatic oils and two continuous fractions for lemon oil mixtures.
김선욱,이성봉 ( Sun Wook Kim,Sung Bong Lee ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.1
Through the observation of phase behaviors in polystyrene-toluene-CO₂ systems by varying CO₂ concentrations the LCST and UCST have been determined experimentally. Fractionation of those solutions has been performed utilizing liquid-liquid phase split phenomena. The experiment shows that only LCST has been detected when the concentration of CO₂ is 15.0 wt% for the temperature range from 7.6℃ to 100℃. We also observed UCST as well as LCST at 16.2 wt% of CO₂ and the dramatic merge of two critical solution temperature curves by increasing CO₂ concentration to 16.6 wt%. When the concentration of CO₂ is 16.6 wt%, the fractionated polymer samples have been obtained at different experimental conditions, and those samples have been analyzed in terms of molecular weights and glass transition temperatures.
정상 한국 성인에서 혈청 암태아성항원의 경계치 및 이에 영향을 미치는 인자
김선욱,정준기,이동수,곽철은,정재민,김명기,이명철,고창순,이형기,유근영,안윤옥,김종순 ( Sun Wook Kim,June Key Chung,Dong Soo Lee,Cheol Eun Kwark,Jae Min Jeong,Myung Ki Kim,Myung Chul Lee,Chang Soon Koh,Hyung Kee Lee,Keun Young Yoo,Yoon Ok 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.3
Carcinoembryonic Antigen is one of most frequent.ly checked tumor markers in cancer management. We performed statistical analysis with serum CEA data of 2626 persons who received regular health examination and were thought to be free of active disease to determine the cutoff values of serum CEA level in normal Korean adults and to study the factors influencing serum (:EA levels in normal subjects. 1) The cutoff values of serum CEA in normal Korean adults in general were 9.28ng/ ml for men, 5.90 ng/ml for women. 2) Serum CEA level was influenced by age, present smoking history, sex, and abnormal findings in chest X ray. 3) Serum CEA level had no correlation with the history of amount of alcohol consumption or obesity. 4) Cutoff values of serum CEA in normal Korean adults were tabulated according to age, sex, and smoking histor y. Serum CEA level was influenced by age, sex, present smoking history and abnormal findings in chest X ray and cutoff values of serum CEA were tabulated according to age, sex, and smoking history.
장력 On-line계측의 사절 현상 해석에의 응용-단경사 장력 최대치의 분포-
김선욱,허유,우제린,Kim, Sun-Wook,Huh, You,Woo, Jae-Lin 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.12
The yarn tension during weaving process has a significant influence on the product quality and production efficiency of woven fabric. On considering the yarn breakage rate in weaving, the analysis and prediction of yarn tension are very important. Pattern of variation in warp tension, at a given location on loom, with time under a certain specific boundary condition provides a vital piece of information for the analysis of yarn breakage rates. In the present work, variation in yarn tension was measured on a group of warp during weaving, and an attempt was made to extract some information on the variation of the extreme tension acting on the single warp yarns from the experimental results. From the experiments and loading model for a yarn group, it can be concluded that the ergodicity of warp yarn tension in weaving process is unlikely to be valid. The tension peak with respect to time has the characteristics of the normal distribution, while the tension on the ensemble basis has shown to be the Weibull distibution.
대규모 사용자 지원을 위한 빅 가상 플랫폼 인프라 시스템 설계 및 구현
김선욱 ( Sun-wook Kim ),오수철 ( Soo-cheol Oh ),조정현 ( Jeong-hyun Jo ),김성운 ( Seong-woon Kim ),김학영,장덕원 ( Deok-won Jang ),( Dae-won Kim ),( Jong-bae Moon ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
가상 데스크탑 서비스 사용자는 데스크탑이나 다양한 모바일 기기를 이용해 할당 받은 계정으로 인증하고 로그인하면 언제 어디서든 인터넷용 가상화 PC 또는 업무용 가상화 PC 를 자신만의 가상 데스크탑처럼 사용할 수 있다. 이러한 가상 데스크탑 서비스가 대중화됨에 따라 라이선스 및 구축 비용, 서비스의 최적화와 같은 사항을 만족시키는 대규모 플랫폼 가상화 기술이 요구된다. 본 논문에서는 클라우드 인프라 상에서 가상 플랫폼을 대규모의 모바일 및 경량 단말 사용자에게 네트 워크를 통해 끊김없이 전송하는 빅 가상 플랫폼 인프라 시스템을 설계 및 구현한다.
4절 링크 이론과 얀센 메커니즘을 기반으로 한 보행 로봇의 운동학 해석
김선욱(Sun-Wook Kim),김동헌(Dong Hun Kim) 한국지능시스템학회 2011 한국지능시스템학회논문지 Vol.21 No.2
본 연구에서는 4절 링크 이론(four-bar linkage mechanism)과 얀센 메커니즘(Jansen mechanism)을 기반으로 다관절 보행로봇(multi-legged walking robot)인 게(crab) 로봇을 제작하고, 게 로봇의 움직임에 대하여 기구학적인 해석을 제시한다. 제작된 게 로봇은 영상 획득을 위하여 카메라를 장착하였고, 장애물 회피를 위하여 3조의 초음파 센서를 가지고 있다. 또한 RF통신으로 외부에 영상 정보를 전달하며, Blue-tooth 통신 모듈을 장착하여 외부로부터 부여된 임무를 수행할 수 있다. 게 로봇의 설계와 제작을 하기 위해서 필요로 하는, 로봇 다리의 움직임을 알기 위해서는 관절 변수와 다리 끝단의 위치 및 자세와의 관계를 얻어야 한다. 따라서, 제안된 기구학적 해석은 로봇의 설계와 제작에 있어서 많은 도움을 주며 중요한 과정이다. In this study, a crab robot is implemented in H/W based on four-bar linkage mechanism and Jansen mechanism, and its kinematics is analysed. A vision camera is attached to the mechanism, which makes the proposed robot a kind of biologically inspired robot for image acquisition. Three ultrasonic sensors are adopted for obstacle avoidance. In addition, the biologically inspired robot can achieve the mission appointed by a programmer outside, based on RF and Blue-tooth communication module. For the design and implementation of a crab robot, it is need to get joint variable, a foot point, and their relation. Thus, the proposed kinematic analysis is very important process for the design and implementation of legged robots.