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정성환(S. H. Jeong),박용군(Y. J. Piao),이상민(S. M. Lee),권대규(T. K. Kwon),홍철운(C. U. Hong),김남균(N. G. Kim) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
In this study, we investigated the influence of vibrational stimulation on postural control. To study the effect, the sway of the center of pressure was observed for two different visual conditions and for three different patterns of vibrational stimulation on plantar area. The two visual conditions were normal condition with visual feedback and blind condition with both eyes closed. The three vibrational stimulations were white noise, constant vibration, and vibration with amplitude modulations (sine curve modulation). The experimental results showed that the sway of the center of pressure distinctively reduced with white noise vibrational stimulation. This result showed that it’s possible to use vibrational stimulation for improving the ability of postural control.
정성환(S. H. Jeong),남기영(K. Y. Nam),이재덕(J. D. Lee),최상봉(S. B. Choi),류희석(H. S. Ryoo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The IEEE std 738 and Cigre Electra documents are well known as the standard of calculating the ampacity of overhead conductors. Although these two standards use the same basic heat balance concept, they use different applicable methods to calculate ampacity ratings. This paper examines the concept of basic heat balance equation and the differences of each term of basic heat balance equation.