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사승윤,김광래,이원평 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5
The demands for robotic and automatic system are continually increasing in manufacturing fields. There have been many studies to monitor and predict the system, but they have mainly focused upon measuring cutting force, and current of motor spindle, and upon using acoustic sensor, etc. In this study, time series sequence of cutting force was acquired by taking advantage of piezoelectric type tool dynamometer. Radial cutting force was obtained from it and was available for useful observation data. The parameter was estimated using PAA (parameter adaptation algorithm) from observation data. ARMA(auto regressive moving average) model was selected for system model and second order was decided according to parameter estimation. Uncorrelation test was also carried out to verify convergence of parameter.
사승윤,유은이,유봉환,Sa, Seung-Yun,Yu, Eun-Lee,Ryu, Bong-Hwan 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.6
The demands for robotic and automatic system are continually increasing in manufacturing fields. There have been many studies to monitor and predict the system, but they have mainly focused upon measuring cutting force, and current of motor spindle, and upon using acoustic sensor, etc. In this study, digital image of time series sequence was acquired by taking advantage of optical technique. Mean square error was obtained from it and was available for useful observation data. The parameter was estimated using PAA(parameter adaptation algorithm) from observation data. AR(auto regressive) model was selected for system model and fifth order was decided according to parameter estimation. Uncorrelation test was also carried out to verify convergence of parameter. Through the proceedings, it was found that there was a system stability.
연구논문 : DNCB로 유도 된 NC/Nga 마우스에서 아토피 피부염에 대한 CGT의 효과
승윤철 ( Yun Cheal Seung ),심부용 ( Boo Yong Sim ) 한국미용학회 2014 한국미용학회지 Vol.20 No.3
In this study, we investigated the effect of CGT on attenuation of the development of atopic dermatitis in NC/Nga mice by evaluating the cytokine level in serum, the IgE level in serum, the mRNA expression of cytokine, and the skin severity. We have come to the following conclusion. CGT led to a significant decrease in the skin severity score as compared to control group. The levels of histamine, IL-4, IL-5, IL-13 in serum of the CGT treated group were inhibited 57%, 73%, 38% and 43%. Also, the mRNA expressions of IL-4, Il-5 and IL-13 in spleen were decreased to 39%, 50% and 49%. CGT treated group showed decrease in the expression of IgE by 56% respectively. level of IgE in serum were decrease to 56%. These results indicate that CGT inhibits the pathogenic development of atopic dermatitis in NC/Nga mice. These results may indicate that CGT attenuates the development of atopic dermatitis-like lesions by lowering inflammatory cytokine levels, and that it is valuable in drug development for the treatment of atopic dermatitis.