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적층식 제조(Additive manufacturing) 기술동향
오지원,나현웅,최한신,Oh, Ji-Won,Na, Hyunwoong,Choi, Hanshin 한국분말야금학회 2017 한국분말재료학회지 (KPMI) Vol.24 No.6
A three-dimensional physical part can be fabricated from a three-dimensional digital model in a layer-wise manner via additive manufacturing (AM) technology, which is different from the conventional subtractive manufacturing technology. Numerous studies have been conducted to take advantage of the AM opportunities to penetrate bespoke custom product markets, functional engineering part markets, volatile low-volume markets, and spare part markets. Nevertheless, materials issues, machines issues, product issues, and qualification/certification issues still prevent the AM technology from being extensively adopted in industries. The present study briefly reviews the standard classification, technological structures, industrial applications, technological advances, and qualification/certification activities of the AM technology. The economics, productivity, quality, and reliability of the AM technology should be further improved to pass through the technology adoption lifecycle of innovation technology. The AM technology is continuously evolving through the introduction of PM materials, hybridization of AM and conventional manufacturing technologies, adoption of process diagnostics and control systems, and enhanced standardization of the whole lifecycle qualification and certification methodology.
12S rRNA로 동정한 홍메치목 Omosudis lowii 치어의 형태적 특징
최해영 ( Hae-young Choi ),장요순 ( Yo-soon Jang ),오지나 ( Ji-na Oh ),김성 ( Sung Kim ) 한국어류학회 2020 韓國魚類學會誌 Vol.32 No.4
마이크로네시아의 축 주변해에서 채집한 치어 (체장 7.8 mm)의 형태적 특징은 체장과 지느러미의 발달 단계를 제외하면 Omosudis sp.와 매우 유사하였다. 이 표본을 12S rRNA 마커를 이용하여 홍메치목의 Omosudis lowii로 동정하였다. 분자마커로 동정된 Omosudis lowii 치어의 형태적 특징은 이 종의 자치어 동정에 매우 유용할 것이다. The morphological characteristics of a larval fish (7.8 mm in body length) collected off Chuuk, Micronesia were highly similar to those of larval Omosudis sp., except fin development and body length. It was identified as Omosudis lowii by partial mitochondrial 12S rRNA gene analysis. The morphological traits of the larval fish validated by the molecular genetic marker will be informative for species-level identification of larval Omosudis lowii.