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전문수기마사지 동작 중 원형강찰법에 대한 동작 및 가압력 분석
김영호,유제성,손종상,황선홍,손량희,차인혁,송재훈,송성재,Kim, Y.H.,Ryu, J.S.,Son, J.S.,Hwang, S.H.,Sohn, R.H.,Cha, I.H.,Song, J.H.,Song, S.J. 대한의용생체공학회 2010 의공학회지 Vol.31 No.6
In this study, the circular friction massage technique was performed on the trapezius, the levator scapulae, and the deltoid muscles to collect the information on massage pressures and positions, and thus to utilize it in professional massage system design. Massage motion was measured with the 3-D motion capture system and finger pressures were simultaneously obtained with grip sensors. Massage motions, pressure patterns, and pressure times were different on each muscle, and the motion trajectory was similar to the ellipsoidal shape. The trapezius had higher pressure, longer massage time, and larger impulse than other muscles. These results could be useful to design a massage system based on biomechanical analysis. In order to improve massage effect, it is also strongly recommended that the tip of the system be similar with that of a human thumb in shape and material.
합금도금강판의 수적에 의한 표면층의 부식기구에 관한 연구
김영호,김순경,전언찬,Kim, Y.H.,Kim, S.K.,Jeon, E.C. 한국기계가공학회 2002 한국기계가공학회지 Vol.1 No.1
Since the early 1980's the use of zinc-aluminum alloy-coated steel sheet(Galvalume) for vehicular corrosion protection has increased drastically. It is consisting of 55%Al-43.4% Zn-1.6%Si. Galvalume has a good corrosion resistance, heat reflectivity and shiny appearance, which has a dendritic structure of alloy layer. It has a good corrosion resistance due to dendritic structure. But, this also has a weak point against moisture during long period of transportation as sheeted and or coiled without any relation of chromating on the surface of steel sheet or not because of high humidity and temperature. Here, We studied the corrosion mechanism by the moisture.
Diazinon이 Mouse의 간세포내 미세구조에 미치는 영향
김영호,정호삼,이규식,Kim, Y.H.,Chung, H.S.,Lee, K.S. 한국현미경학회 1984 Applied microscopy Vol.14 No.2
The organic phosphorus compounds have been widely used as an insecticide, since toxicity of these compounds is especially drastic to the insects than to men and other mammals. The organic phosphates are rapidly hydrolized and hence have little cumulative and ecologic effects. However, due to their acute toxic effects organophosphate have recorded rather high fatalities in men and domestic animals. The organic phosphorus compounds are powerful inhibitors to the carboxylic esterase enzymes such as acetylcholinesterase and pseudocholinesterase. As a result of firm binding characteristics of phosphate radicals to the active sites of enzyme, the activities of these enzymes are inhibited by the organophosphates. The organophosphates such as diazinon is easily observed from skin, gastrointestinal tract, conjunctivas and respiratory tract, and it is converted to more toxic form during metabolism in the liver The present study was carried out in order to investigate the hepatotoxicity of diazinon by observing the changes in the ultrastructure of cytoplasmic organelles of hepatic cells in albino mice. The animals were killed at 6, 12 and 24 hours after administration of 25mg/kg diazinon. The piece of hepatic tissue obtained from each animal was ultrathinly sectioned. The specimens stained by uranyl acetate and lead citrate double contrast methods were observed with JEM model 100B electron microscope. The results obtained were as follows: 1) A prominent dilatation and sacculation of the cisternae of rough endoplasmic reticulum associated with detachment of membrane bound-ribosomes, and disaggregation of the free ribosomes were recognized. 2) The hypertrophy of the smooth endoplasmic reticulum associated with depletion of the glycogen particles was observed. 3) The atrophy of cisternae of Golgi complex was observed. 4) A large number of secondary lysosomes (autophagic vacuoles and residual bodies) were formed. Consequently it is suggested that diazinon would induce disorganization of the cytoplasmic organelles of hepatocytes in albino mice.
과실수확(果實收穫) 로봇에 관한 연구(硏究)(II) -폐쇄회로(閉鎖回路) TV 카메라에 의한 과실(果實)의 위치검출(位置檢出)-
류관희,노상하,김영호,Ryu, K.H.,Noh, S.H.,Kim, Y.H. 한국농업기계학회 1989 바이오시스템공학 Vol.14 No.2
The most important subject in developing agricultural robots for fruit harvesting is to detect accurately the location of a fruit about the given coordinate system. This study was carried out to develop an image processing algorithm which enables finding out the three dimensional locations of a fruit. The digital image processing device consisted of an optosensor (Closed-circuit TV camera), image processing interface board (Digitizer) and microcomputer (IBM PC/AT). A stereo-image processing method using the two cameras attached to the manipulator was evaluated through experiment with apples. The accuracy and quickness of detecting the location of apples by this method was not satisfactory. The maximum errors of the detected locations by the stereo-image processing method in x-, Y-, and z- directions were 3, 4 and 4 cm, respectively. The maximum time required to get the rectangular coordinate data of a fruit was about 2 minutes.