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안재준,심현식 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.4
As the function of a product is advanced and the process is refined, the yield in the fine manufacturing process becomes an important variable that determines the cost and quality of the product. Since a fine manufacturing process generally produces a product through many steps, it is difficult to find which process or equipment has a defect, and thus it is practically difficult to ensure a high yield. This paper presents the system architecture of how to build a smart manufacturing system to analyze the big data of the manufacturing plant, and the equipment factor analysis methodology to increase the yield of products in the smart manufacturing system. In order to improve the yield of the product, it is necessary to analyze the defect factor that causes the low yield among the numerous factors of the equipment, and find and manage the equipment factor that affects the defect factor. This study analyzed the key factors of abnormal equipment that affect the yield of products in the manufacturing process using the data mining technique. Eventually, a methodology for finding key factors of abnormal equipment that directly affect the yield of products in smart manufacturing systems is presented. The methodology presented in this study was applied to the actual manufacturing plant to confirm the effect of key factors of important facilities on yield.
안재준,Kashif Akram,김병근,백지영,곽지영,박은주,김효영,김청태,정일윤,이주운,한상배,권중호 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.4
Thermoluminescence (TL) technique for identifying γ-irradiated (0-10 kGy) anchovies (dried), kelp (dried), and mackerel (fresh) was validated in an interlaboratory blind trial. Different irradiation detection laboratories were involved by using 2 methods of mineral separation (density separation and acid hydrolysis) for the analysis. Key TL parameters, including the TL glow-curve shape, intensity, and the TL ratio (TL1/TL2) were used to characterize the irradiation status. All irradiated samples exhibited an intense TL peak at approximately 200oC,which was absent in non-irradiated samples. TL glow curve interpretations were also confirmed by determining the TL ratio. Different participating laboratories reported 89-100%correct results. Both methods of mineral separation were equally effective; however, some variation was observed in the results from different laboratories for irradiated mackerel,which might be due to a lack of isolated minerals, differences in personnel expertise, and different TL instruments.
Chlorsulfonated Polyethylene 으로 개질된 Polyvinylchloride 의 제조와 물성
안재준,이승태,김병규,신영조 ( Jae Joon Ahn,Seung Tae Lee,Byung Kyu Kim,Young Jo Shin ) 한국공업화학회 1994 공업화학 Vol.5 No.2
Chlorosulfonated polyethylene(CSM)은 수지의 toughness modifier로서 사용할 수 있다. CSM는 산소와 오존에 대해서 저항성이 클 뿐 아니라 가교 가능한 기능기인 sulfonyl chloride를 가졌기 때문에 금속 산화물에 의해 가교 될 수 있다. Polyvinylchloride(PVC)는 물성이 좋을 뿐 아니라 값이 싼 plastic이기 때문에 널리 사용되는 범용수지이나 저온에서 충격강도가 약하고 빛과 산소 그리고 오존에 의해서 분해되어 물성을 떨어뜨리는 결점이 있다. 이런 결점을 개선하고 저 PVC/CSM 블렌드를 연구하였다. CSM함량 10∼30%에서 현저한 toughening효과를 나타내었다. CSM을 블렌드함으로써 PVC의 내후성, 내오존성 및 기계적 성질이 개선되었으며 toughening효과를 SEM을 통하여 관찰하고 확인하였다. As a toughness modifier for plastics chlorosulfonated polyethylene(CSM) can be used. CSM has a good resistance to oxygen and ozone. CSM has a crosslinkable functional group(sulfonyl choride) with sulfur and metal oxide. Polyvinylchloride(PVC) is widely used industrial plastics because of its balanced properties and low cost. But it has some disadvantages such as low impact strength, light, ozone and oxygen degradation. In order to improve these properties of PVC, CSM was blended with PVC. The toughening effect appeared at about l0wt% and there is no additional effect above 30wt % of CSM. The weatherability, ozone resistance and mechanical properties of PVC were improved by blending with CSM. The toughening mechanism is studied by SEM.