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풋콩 탈협기 개발을 위한 기초 연구 (II) - 탈협 및 선별 특성 -
김태한,임학규,이정택,Kim T H.,Lim H. K.,Lee J. T. 한국농업기계학회 2004 바이오시스템공학 Vol.29 No.5
Worldwide consumption of vegetable soybean has been increasing recently, but in the process of vegetable soybean production, threshing and separation work accounts fur about $80\%$ of overall labor. Therefore, developing of the vegetable soybean thresher is necessary to reduce the cost of labor. The main objective of this study is to acquire the basic in-formations for design of the vegetable soybean thresher which is suitable for domestic circumstances. We made the experimental system to investigate the threshing and separating performance at the several speeds of threshing cylinder and separating blower according to the kinds of threshing tooth. The result are as follows; Threshing performance of vegetable soybean thresher was shown as the best in case the threshing tooth made of rubber which has the 80 of Shore hardness was used at the circumference speed of cylinder of 5.8$\~$8.1m/s. Also separating cleaning performance of vegetable soybean thresher was shown as the best at more than 1,300 rpm of blower speed and $60\~80\%$ of opening ratio of suction port.
Smart Korea와 Smart Life를 위한 전파자원 이용정책 동향
김태한,장재혁,성기훈,Kim, T.H.,Jahng, J.H.,Sung, K.H. 한국전자통신연구원 2011 전자통신동향분석 Vol.26 No.2
최근 우리나라 사회의 각 분야에 걸쳐 Smart Korea를 구축하고자 하는 노력이 활발히 이루어지고 있다. 이는 각 개인뿐만 아니라 기기들도 지능적인 사고를 통해 서로 유기적으로 연결될 수 있는 체제를 의미하는데, 국가 전체적인 관점에서 Smart Korea가 구현되기 위해서는 각 개인의 관점에서의 똑똑한 삶인 Smart Life가 구현되어야 한다. 이러한 Smart Korea와 Smart Life의 구현을 위해서는 무선 통신을 위한 필수적 자원인 전파자원의 효율적인 활용이 기술적인 측면에서 뿐만 아니라 정책적인 측면에서도 중요하다. 본 고에서는 먼저 Smart Korea와 Smart Life의 개념을 살펴보고, 각각의 구현을 위한 전파자원의 이용정책 동향에 대해 기술하고자 한다.
다양한 유사체액과 인공타액에서 치과용 임플란트의 전기화학적 특성
김태한(T. H. Kim),박근형(G. H. Park),손미경(M. K. Son),김원기(W. G. Kim),장승현(S. H. Jang),최한철(H. C. Choe) 한국표면공학회 2008 한국표면공학회지 Vol.41 No.5
Titanium and its alloy have been widely used in dental implant and orthopedic prostheses. Electrochemical characteristics of dental implant in the various simulated body fluids have been researched by using electrochemical methods. Ti-6Al-4V alloy implant was used for corrosion test in 0.9% NaCl, artificial saliva and simulated body fluids. The surface morphology was observed using scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDX). The electrochemical stability was investigated using potentiosat (EG&G Co, 263A). The corrosion surface was observed using scanning electron microscopy (SEM). From the results of potentiodynamic test in various solution, the current density of implant tested in SBF and AS solution was lower than that of implant tested in 0.9% NaCl solution. From the results of passive film stability test, the variation of current density at constant 250 mV showed the consistent with time in the case of implant tested in SBF and AS solution, whereas, the current density at constant 250mV in the case of implant tested in 0.9% NaCl solution showed higher compared to SBF and AS solution as time increased. From the results of cyclic potentiodynamic test, the pitting potential and |Epit ? Ecorr| of implant tested in SBF and AS solution were higher than those of implant tested in 0.9% NaCl solution.