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System of first order linear (p, q)-difference equations
최국,정남순,류천성,황경원 장전수학회 2017 Advanced Studies in Contemporary Mathematics Vol.27 No.4
In this paper, we consider a system of first order linear (p, q)-difference equations, using (p, q)-derivative and (p, q)-integral. We find the solutions of a system of linear (p, q)-difference equations which are similar to the general linear difference equations.
崔國光,劉甲鍾 慶北工業專門大學 1968 論文集 Vol.5 No.-
This paper presents results of an experimenntal investigation of free convective heat transfer in liquid confined by two Annuli and iinclined at various angles with respect to the horizontal. The experiments covered a range of Rayleigh numbers between 1.6(10)?? and 6.25(10)?? and Nusselt numbers between 3 and 11.5. Tests were made in annular container having copper cylinders. The liquid used was water. The test results indicate that the heat transfer coefficients for the liquid investigated at various angles, from horizontal to vertical, may be determined from the relationship; Nu=C(Gr.Pr)¼ The constant, is a function of the angle of inclination. It varies from C=0.21 for the horizontal case to C= 0.15 for the verical case.
熔接殘留應力이 SS41鋼의 機械的性質에 미치는 影響에 關한 硏究
崔國光 慶北工業專門大學 1971 論文集 Vol.8 No.-
The general structural steel is destroyed easily while using after welding. On this paper I selected the Rimmed steel(SS41) made in Korea the general structural steel as sample and tested the mechanical properties of it by Arc welding. As the result of the test the welding part is getting weak not only on stress and strain but also by retained stress arose from corrosion.