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Hot Press 및 Die - Upset 법에 의해 제조된 Nd - Fe - B - Co 자석의 자기적 특성
이경섭(K. S. Lee),김용성(Y. S. Kim),서수정(S. J. Suh),박현순(H. S. Park),박찬(C. Park) 한국자기학회 1997 韓國磁氣學會誌 Vol.7 No.1
The effect of Co and annealing temperature on the magnetic properties, phase change and microstructure of melt-spun (Nd_(14.73)Fe_(78.67)B_(6.60))_(100-x)Co_x (X=0, 1, 2, 3) ribbons has been studied. The Co containing ribbons were found to have higher coercivity (iHc) than the ribbons without Co. Intrinsic coercivity of 20.3 kOe has been obtained by addition of 2 at%Co. This effect by Co addition is also represented in the case of hot pressed and die-upseted magnets. The maximum intrinsic coercivities of hot press and die-upset (Nd_(14.73)Fe_(78.67)B_(6.60))_(100-x)Co_x (X=0, 1, 2, 3) magnets are 16.9 kOe and 15.2 kOe when X=2.
이경섭(Kyoung-Soub Lee),박정호(Jeong-Ho Park),박형순(Hyung-Soon Park) 대한기계학회 2017 大韓機械學會論文集B Vol.41 No.8
본 논문에서는 다양한 견관절 장애 증상에 적용할 수 있는 보급형 상지 재활 로봇의 설계를 다룬다. 견관절의 회전에 수반되는 관절 중심의 위치변화를 추종하고, 사용자의 상지와 장치의 무게를 상쇄하는 3자유도 견관절 추종 및 중력보상 메커니즘을 구현하였다. 다양한 방향의 어깨 재활 동작을 구현할 수 있도록 구동축의 방향을 변환하는 메커니즘을 설계하여, 견관절에 대한 구동기의 상대적인 오리엔테이션을 변화시킴으로써 대표적인 5가지 견관절 동작을 수행할 수 있었다. 동시에 재활 운동 중의 견관절의 위치 변화를 추종하여 자연스러운 견관절 운동을 구현할 수 있었다. 최소의 구동기를 사용하는 보급형 로봇으로도 다양한 견관절 질환에 효과적으로 대응할 수 있음을 확인하였다. This paper presents a low-cost robotic device for shoulder rehabilitation, which is capable of treating various shoulder disabilities. A 3-DOF passive shoulder joint tracking module was designed to allow for translational motion of the shoulder joint center during arm swing, which is essential for natural shoulder movement. The weight of the user"s arm and the device were compensated for by springs, to enable gravity-free shoulder motion. In order to reduce the device"s cost, only one actuator was used, which can be aligned with the user"s shoulder joint in various orientations. The device is capable of implementing five representative shoulder motions, including flexion/extension, abduction/adduction, horizontal abd/adduction, internal/external rotation, and oblique raise. The proposed low-cost shoulder rehabilitation robot is expected to provide effective rehabilitation for patients with various shoulder impairments.
원저 : 20-40대 여성의 체질량지수에 따른 한방변증지표의 특성 연구
박경선 ( Kyoung Sun Park ),유승연 ( Seung Yeon Yoo ),박영재 ( Young Jae Park ),이창훈 ( Chang Hoon Lee ),조정훈 ( Jung Hoon Cho ),장준복 ( Jun Bock Jang ),이경섭 ( Kyung Sub Lee ),이진무 ( Jin Moo Lee ) 한방비만학회 2011 한방비만학회지 Vol.11 No.1
The purpose of this study was to examine the characteristics of diagnostic pattern questionnaire associated with Body Mass Index in premenopausal women. Methods We studied 41 patients visiting Gangdong Kyung Hee University Hospital from 1st April 2011 to 25th May 2011. The subjects were categorized in two groups, overweight & obesity group (n=12) and low weight & normal group (n=29). We studied the difference of diagnostic pattern questionnaire scores between two groups by Independent samples T-test and correlation between diagnostic pattern questionnaire scores of overweight & obesity group by Pearson`s correlation coefficient test using SPSS for windows (version 13.0). Results Blood stasis, retention of undigested food, cold pattern scores of overweight & obesity group were non-significantly higher than low weight & normal group. Heat pattern score of overweight & obesity group was significantly higher than low weight & normal group. Cold-heat, phlegm-cold, blood stasis-cold, phlegm-blood stasis, phlegm-retention of undigested food significantly showed positive correlation coefficient in overweight & obesity group. Conclusions The results suggest that obese women tend to show heat pattern. It seems to be that multiple factors such as phlegm, blood stasis, retention of undigested food are causative of obesity.
로봇을 통한 자연스러운 팔 동작 재활을 위한 수동형 어깨 관절 추종 장치의 설계
박정호(Jeong-Ho Park),이경섭(Kyoung-Soub Lee),채상훈(Sang-Hoon Chae),하도경(Do-Kyeong Ha),김동현(Dong-Hyun Kim),박형순(Hyung-Soon Park) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
This paper aims to present development of a passive shoulder joint tracking device for shoulder rehabilitation robots able to support natural arm motion. Allowing three-dimensional translation of shoulder joint is important for rehabilitation robots to support natural arm motions. For patients suffered by various shoulder diseases, in addition, supporting weight (i.e. compensating gravity) of their upper limbs is also needed to let them move their arm freely. Unfortunately, most commercial robots for shoulder rehabilitation are unable to support natural arm motion by restricting the movement of shoulder joint. In our laboratory, three degree-of-freedom (DOF) passive shoulder joint tracking device has been developed. The proposed device is composed of single DOF vertical tracker simultaneously compensating gravity of upper limb by a spring and two DOF horizontal tracker. Because the device works completely in a passive manner, it is featured as simple structure, light-weight and low cost. Due to its simplicity, it can be easily combined to existing shoulder rehabilitation devices. In this paper, at first, design of the first version of the device is described briefly. Second, as a proof of concept, its shoulder joint tracking performance is evaluated through motion analysis of upper limb with one healthy subject. Last, improved design of gravity compensating mechanism for better performance and easier adjustment is described.