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이종원,이미경,이형옥,이성계,도재호,김만욱 ( Jong Won Lee,Mi Kyung Lee,Hyung Ok Lee,Seong Kye Lee,Jae Ho Do Man Wook Kim ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.5
The purpose of this study was to investigate the differences in proximate composition, free sugars, amino acids, fatty acids and Hunter color values between fresh and odorless garlic. The contents of crude fiber, crude fat and ash in odorless garlic were similar to those in fresh garlic. Sugars and crude protein decreased during manufacture of odorless garlic. Among the free sugars, sucrose, maltose and fructose decreased in odorless garlic, while the content of glucose increased. Total amino acid content decreased by about 30% in odorless garlic. Among the amino acids decreased arginine, isoleucine etc. The contents of linoleic acid, palmitic acid and oleic acid were higher than those of other fatty acids in fresh garlic and odorless garlic, but laruric acid was in little quantity. There were no significant differences in the Hunter L and b value between the fresh and odorless garlic, but value for greeness(-a) was lower in odorless garlic.
운동방정식을 기저로 한 스튜워트 플랫폼 운동장치의 제어시스템 설계 및 슬라이딩 모드제어
이종원,김낙인,Lee, Chong-Won,Kim, Nag-In 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.6
A high speed tracking control system for 6-6 Stewart platform manipulator is designed for performing the model based joint-axis sliding mode control. Because of the complex dynamics and kinematics of the Stewart platform manipulator, two computer systems, consisting of a PC and a DSP, are adopted, so that real time tasks are run in synchronous and asynchronous modes. It is experimentally proven that the proposed control system makes the convenience in implementation of model based tracking control, so that it can achieve effective tracking control under relatively high speed and additional payload conditions.
이종원,김상렬,김봉기,Lee, Jong Won,Kim, Sang Ryul,Kim, Bong Ki 한국전산구조공학회 2014 한국전산구조공학회논문집 Vol.27 No.5
본 연구에서는 테이퍼 보에 대한 미분방정식의 일반해에 캔틸레버 보의 경계조건을 적용하여 모드특성을 추정한다. 또한, 휨을 받는 테이퍼 원형강관 캔틸레버 보에 발생하는 관통균열을 모델링하기 위하여 에너지 방법을 이용하여 균열보에 대한 보 길이방향 휨강성을 구한 후 이를 이용하여 테이퍼 원형강관 캔틸레버 균열보에 대한 고유주파수와 모드형상을 추정한다. 보 길이에 따른 균열보의 휨강성 변화는 기존 연구에서 밝혀진 현상과 유사하게 합리적인 양상을 보였으며, 유도한 휨강성을 적용하여 산정한 균열보의 고유주파수는 균열 크기가 증가할수록 감소함을 확인하였고, 모드형상은 균열발생에 의해 변화함을 알 수 있었다. 연구결과는 향후 테이퍼 원형강관 캔틸레버 보 형태의 타워 구조물에 대한 진동기반 균열탐지에 활용될 수 있을 것으로 판단된다. Modal properties for tapered cantilever pipe-type beam is identified by applying the boundary conditions to a general solution for tapered beam. A bending stiffness for cracked beam is constructed based on an energy method for tapered cantilever thin-walled pipe, which has a through-the-thickness crack, subjected to bending. Then the natural frequencies and mode shapes of a tapered cantilever thin-walled cracked pipe are identified. It can be found that the phenomenon of the bending stiffness distribution along the beam length of the cracked beam is quite reasonable, the natural frequencies are decreased as the crack sizes are increased, and the mode shapes are changed due to the crack. This results may be used to the vibration-based crack identification for the tapered cantilever pipe-type tower structures.
교통동맥분절의 내측벽에서 기원한 내경동맥류 치험 2례 - 증례보고 -
이종원,석종식,권정택,민병국,Lee, Jong-Won,Suk, Jong-Sik,Kwon, Jung-Taek,Min, Byung-Kook 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.10
Aneurysms of the medial wall of the internal carotid artery(ICA) constitute a rare group of ICA aneurysms arising at locations other than at arterial division. Because these aneurysms usually have thin walls and wide necks associated with arteriosclerosis, neck clipping should be taken into special consideration. The authors report two cases of the aneurysm presented with subarachnoid hemorrhage, in which neck clippings ware performed with impunity.
이종원,오세훈,김준철,전한수,Lee, Chong-Won,Oh, Se-Hoon,Kim, Jun-Cheol,Jeon, Han-Su 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7
Due to progress in manufacturing techniques, the performance of the harmonic drive has been improved but not sufficiently. One of the important problems which the current harmonic drive has is that while there is the potential for having a wider tooth contact area, the total number of teeth engaged simultaneously is still small. This is mainly due to the involute tooth profile. Hence, in this study, the cycloid-type tooth profile is developed to improve this problem. This paper represents the design methodology and performance evaluation f the cycloid-type harmonic drive. Cycloide tooth profile was derived by analyzing geometry of the tooth engagement and the contact mechanisms of the tooth which were examined and analyzed by load analysis. The stress due to elastic deformation of a flexspline was also obtained by approximate formula and computer analysis. Finally, the cycloid-type harmonic drive with 1:100 speed ratio was manufactured and the performance of the harmonic drive was evaluated.