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유병로(Byung Rho Ryu),김춘길(Chun Gil Kim) 대한공업교육학회 2000 대한공업교육학회지 Vol.25 No.1
The purpose of this study was to review trends in electronics industry in order to suggest the directions for electronic industrial education. The study was conducted through reviewing available literature. Electronics industry change from hardware industry to hardware embeded in software & information process industry. Therefore mastering electronic troubleshooting skill is critical for electronic engineering technology graduates entering the modern workplace. Teaching electronic troubleshooting skill is not an option.
Al계 및 Fe계 응집제에 의한 오,폐수의 처리효율 평가
박석순 ( Seok Soon Park ),최충호 ( Choong Ho Choi ),유병로 ( Byung Rho Ryu ),김철규 ( Cheol Gyu Kim ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.2
N/A To upgrade the efficiency of advanced treatments in a medium/small size wastewater treatment utilities and explore a reliable way coping with in emergency for the keeping a water quality when a biological action in wastewater treatment process has not worked properly, the treatment efficiencies on the wastewater by coagulation which is one of well-known chemical treatment methods were evaluated in laboratory scale. Raw wastewater used were synthesized, and AS, PAC, FS, FC as coagulants were used in this research. Water qualities parameter used here were BOD_(5), CODCr, SS, T-N, T-P, pH, alkalinity, and these were measured according to the Korean standard methods. Consequently, the efficiencies of jar tests with all coagulants on the removals of SS and phosphorus were more than about 90%, but efficiencies of them on the removals of BOD_(5), CODCr, T-N were relatively low. Generally, iron based coagulants rather than aluminium based coagulants has shown more effective on the organic matters removals. PAC as coagulants also has shown the best outstanding efficiencies in almost water quality parameters of treated wastewater.