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이균정,박동희,신태민,서종범,Lee, G.J.,Park, D.H.,Shin, T.M.,Seo, J.B. 대한의용생체공학회 2008 의공학회지 Vol.29 No.4
Plastic hardener and softener based ultrasound phantoms were made in various constitutions and their acoustic properties were measured. Speed of sound is approximately $1.4\;mm/{\mu}sec$ in all the phantoms, which is about 7% less than that of in soft tissue. Attenuation coefficient is strongly dependent on the ratio between hardener and softener. In order to achieve the tissue level attenuation (0.5 dB/cm/MHz), 60% of hardener or less is required. The synthesized phantoms can be preserved for more than 6 months without structural degradation.
자전거 운동량 평가를 위한 전도성 직물 기반의 사용자 무구속 심전계 및 스마트폰 어플리케이션
황라영,신영은,최우혁,신태민,Hwang, L.Y.,Shin, Y.E.,Choi, W.H.,Shin, T.M. 대한의용생체공학회 2014 의공학회지 Vol.35 No.5
As assessment of quantitative energy expenditure for effective exercise is becoming more important, many researches about the monitoring system for exercise status or result have been actively carried out. In this case, however, bicycle riders feel restrained and uncomfortable because the riders should wear a belt-type electrocardiograph or a watch-type accelerometer or GPS system during the assessment of bicycle exercise. In this study, therefore, an electrocardiograph based on textile electrode was developed for measuring ECG and calculating heart rate from the bicycle rider without feeling restraint, and smartphone application was also developed for monitoring the heart rate.