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저공해 스토커형 도시폐기물 소각로 설계를 위한 열유동 수치해석 연구
전영남,송형운,김미환 한국환경과학회 2002 한국환경과학회지 Vol.11 No.6
A Numerical simulation on the thermal flow performance was carried out to propose the incinerator type for the domestic refuses and to investigate the design factor and operating conditions. The SSTI(Standard Stoker Type Incinerator) proposed in this study was modified from the type with central flow. It has the characteristics of good mixing between refuse and hot combustion gas in primary combustion chamber and between unburned gas inflowing and secondary air jet in secondary chamber. By predictive results, the SSTI was no recirculation zone in secondary chamber so that mixing time was increased with high residence time. It has good characteristics of combustion and low emission. Parametric screening studies have been understood with phenomenon of combustion in incinerator.
韓國 齒科界에서 使用되고 있는 齒科用 鑄造金合金에 대한 調査 : A Study of Dental Casting Gold Alloys Used in Korea
禹亨植,全永男 大韓齒科器材學會 1967 대한치과재료학회지 Vol.2 No.2
A survey concerned with dental gold alloys used in Korea has made by questionnaires in order to ascerain whether Korean dentists are using the correct type of casting gold allays comparing with A.D.A. Specification #5. The questionnaires were as below. 1. Classification of the dental gold alloys. a. Use any commercial casting gold alloys? b. Otherwise, how do you get the casting gold alloys? 2. Constitutional formula of dental casting gold alloys? 3. Heat treatment method. The tesults were as follows. 1. Majority of answerers were making the dental casting gold alloys by themselves. 2. Less gold in constitution of the dental casting gold alloys were found from many answerers. 3. Excessive or less cupper in constitution were detected several clinics 4. Around 15 percent of silver contained alloys from the consititutional formula of dental gold alloys were adopted by many clinicians, however, none silver contained alloys were also found. 5. Excessive platinum was added for hard gold alloys. 6. Paladium, Zinc and Nickel was combined for dental casting glod alloys by few dentists. 7. Improper heat treatment methods were adopted by many dentists.