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김원규,강인식,곽기석,김도삼,Kim, W. K.,Kang, I. S.,Kwak, K. S.,Kim, D. S. 한국항해항만학회 1994 韓國港灣學會誌 Vol.8 No.1
The present paper discusses the nonlinear wave deformation due to a submerged coastal structure. Theory is based on the frequency-domain method using the third order perturbation and boundary integral method. Theoretical development to the second order perturbation and boundary integral method. Theoretical development to the second order Stokes wave for a bottom-seated submerged breakwater to the sea floor is newly expanded to the third order for a submerged coastal structure shown in Figure 1. Validity is demonstrated by comparing numerical results with the experimental ones of a rectangular air chamber structure, which has the same dimensions as that of this study. Nonlinear waves become larger and larger with wave propagation above the crown of the structure, and are transmitted to the onshore side of the structure. These characteristics are shown greatly as the increment of Ursell number on the structure. The total water profile depends largely on the phase lag among the first, second and third order component waves.
권영이(Y. E. Kwon),황규자(K. J. Whang),김안근(A. K. Kim),김국환(K. H. Kim),김원규(W. K. Kim),안동춘(D. C. Ahn) 대한약학회 2000 약학회지 Vol.44 No.2
Flavin mononucleotide (1,4-butanediamine) Pt(II) complex (7FMN) was synthesized and screened anticancer activity [J.Pharm.Soc.Korea 43(6), 762-770 (1999)]. 7FMN have good water solubility and moderate anticancer activity. In this paper, cell-cycle specificity and nephrotoxicity were studied. Interaction of DNA with cisplatin and synthesized 7FMN was analyzed by flow cytometry, and showed G2 arrest in L1210 cell fine. It means that cell-cycle on L1210 was inhibit in S phase by cisplatin and 7FMN. In order to biochemically analyze nephrotoxicity of cisplatin and 7FMN, after injecting each agent intrapenritoneary, blood was exsangumated after 6 hours, 1 day, 3 days and 7 days, respectively. Then, serum was separated from the blood. The serum level of BUN, creatinine and uric acid in cisplatin and 7FMN administrated mice (25-35g, ICR strain, a dose each 8, 12 and 16 times of the IC50 value, cisplatin; 7 times) were determined by autochemistry analyzer. In cisplatin-administered mice group, BUN level was elevated than normal control group at 3rd day and repaired at 7th day. In 7FMN administrated group was not elevated. Crea@e and uric acid level were no difference with the normal control group. Therefore synthesized 7FMN is less toxic than cisplatin in nephrotoxicity.
이두순(D.S.Lee),김원규(W.K.Kim),오대윤(D.Y.Oh),최재권(J.K.Choi) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
We developed a new measuring equipment which makes it possible to perform on-line measurements with the merits of its simplicity and the time-saving characteristics. By using the newly developed measurement system, the amount of aeration is directly measured on several parameters, i. e., engine speed, oil quantity, oil deterioration, oil temperature and viscosity, etc. It showed that oil aeration is strongly related to the gas movements in crankcase and the residence time of circulating oil in oil pan. In addition, in order to clarify the mechanism of aeration and to quantify the degree of aeration, a modelling analysis to predict aeration was performed, and as a guiding parameter, Aeration Index was defined. Finally, the parameter was compared with the actual amount of aeration, and it was confirmed that they gave a good correlation with each other.<br/>