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김갑성,KIM KAP-SUNG 한국천문학회 2000 天文學論叢 Vol.15 No.suppl2
We have investigated the numerical methods to calculate model atmosphere for the analysis of spectral lines emitted from the sun and stars. Basic equations used in our calculations are radiative transfer, statistical equilibrium and charge-particle conservations. Transfer equation has been solved to get emitting spectral line profile as an initial value problem using Adams-Bashforth-Moulton method with accuracy as high as 12th order. And we have calculated above non linear differential equations simultaneously as a boundary value problem by finite difference method of 3 points approximation through Feautrier elimination scheme. It is found that all computing programs coded by above numerical methods work successfully for our model atmosphere.
김갑성,조명승 대한금속재료학회(대한금속학회) 1968 대한금속·재료학회지 Vol.6 No.2
A feasibility study on sulfide mineral bearing iron ore from Yangyang iron mine was made to eliminate sulfur contents. The study indicated that by magnetic separation and flotation a portion of sulfide minerals could be removed. Magnetic separation, alone, was not amenable to eliminate effectively the sulfur contents to meet the iron ore concentrate specification. Petrographic examination showed that dendritical intrusion of sulfide minerals into magnetite grains needed fine grinding over 100 mesh for liberation.
김갑성,KIM KAP-SUNG 한국천문학회 1998 天文學論叢 Vol.13 No.1
We have carried out high precision orbit calculation, by using various numerical techniques with accuracy of higher than fourth order, in order for exact prediction on position and velocity of celestial bodies and artificial satellites. General second order ordinary differential equation has been solved numerically to test the performance for each of numerical methods. We have compared computed values with exact solution obtained by using universal variables for two body problem and discussed overall results of numerical methods used in our calculation. As a result, it is found that high order difference table method called as Gauss-Jackson method is best one with easiness and efficiency in the increase of accuracy by number of initial values.
김갑성,홍승수,Kim, Gap-Seong,Hong, Seung-Su 한국천문학회 1992 天文學論叢 Vol.7 No.1
고수준의 천체화상처리에 관련된 모든 작업을 개인용 컴퓨터로도 충분히 수행할 수 있도록 제작된 화상처리용 그래픽라이브러리와 그 응용프로그램을 소개한다. 본 프로그램은 손쉽게 작업할 수 있는 대화식 한글 GUI 환경을 사용자에게 제공하여 다양하게 선택 가능한 작업메뉴로부터 천체화상처리를 비롯한 천문계산 및 도형출력등의 여러가지 응용프로그램을 실행시키도록 개발되었다. 그 주된 내용은 마우스에 의해 조작할 수 있는 통합처리환경의 제작. 양질의 천체화상 획득과 정밀측광을 위한 화상처리 그리고 출력장치에 구애받지 않는 화상출력의 구현이라 할 수 있다. 본 프로그램의 작성에는 C와 포트란언어가 사용되었으며 하드웨어에 관계없이 자유로운 한글처리를 위해 소프트웨어 자체에 한글을 내장하는 방법을 선택하였다.