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나선형 홈이 있는 브레이크 디스크의 열탄성불안정성에 대한 수치해석
정해일(Hae-Il Jung),최갑승(Kap-Seoung Choi),강일환(Il-Hwan Kang),왕학민(Hak-Min Wang),김형만(Hyung-Man Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The brake disc is the thermoelastic instability by the frictional heating during braking. In the present paper, the helical grooved vent brake disc is proved the thermoelastic instability by numerical analysis. The FEM analysis had been practiced for the comparisons of the thermoelastic instability and thermal deformation between the helical grooved vent brake disc and the conventional one.
김상대 ( Sang Dai Kim ),김세종 ( Sei Jong Kim ),박세종 ( Sei Jong Park ),정학민 ( Hak Min Jung ) 대한소화기학회 1981 대한소화기학회지 Vol.13 No.1
The SGOT/7-GTP ratios were observed in 87 cases of various hepatic disease groups, including 11 cases of acute viral hepatitis/A.V.H.), 7 cases of chronic active hepatitis(C.A. H.), 11 cases of chronic persistent hepatitis(C.P.H.), 34 cases of liver cirrhosis(L,C.), 7 cases of hepatoma(H.T.), 5 cases of amebic liver abscess(A.L.A.), 7 cases of pyogenic liver abscess (P.L.A.) and 5 cases of gall stone(G.S,) group. The results were as follows: 1. The SGOT/T-GTP ratio was 3. 18>2. 17 in A.V.H. group, 1. 18<1. 12 in C.A.H, group, 0.79+0.48 in C.P.H. group, 1.071.25 in L.C. group, 0.46>0.27 in H.T. group, 0.74+0.49 in A.L.A. group, 0. 77+0. 91 in P.L.A. group and 0. 37+0. 10 in G.S. group. 2. The SGOT/7-GTP ratio was elevated significantly in A.V.H. group, and decreased significantly in H.T. group and G.S. group compared with other disease groups. It was significant in differentiating L.C. group from H.T. group. 3. The SGOT/7-GTP ratio were not significant in differentiatiating of L.C. group from chronic hepatitis group, and H.T. group from gall stone group.