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김기태,원유삼,이승민,양재영,최천식,주문배,금주섭,Kim, Ki Tai,Won, You Sam,Lee, Seung Min,Yang, Jae Young,Choi, Chun Sik,Ju, Mun Bae,Keum, Joo Seob 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.5
Hemangioendotheliomas are vascular neoplasms characterized by histologic appearance that are intermediate between hemangiomas and angiosarcomas first described by Weiss and Enzinger in 1982. They are classified into at least 3 subgroups, including epithelioid hemangioendothelioma, spindle cell hemangioendothelioma, and malignant endovascular angioendothelioma, and have been reported principally in soft tissues of the extremities, lung, liver, and bone. The cases involving the central nervous system reported are very rare. We report an intraspinal epithelioid hemangioendothelioma occurring in a 52-year-old man. To our knowledge, it is first case of spinal hemangioendothelioma in Korea.
Complete Nucleotide Sequence of Hepatitis B Virus (subtype adr)
김기태,현상원,김용석,노현모,Kim, Kee-Tae,Hyun, Sang-Won,Kim, Yong-Sok,Rho, Hyune-Mo 생화학분자생물학회 1988 한국생화학회지 Vol.21 No.4
대장균내에 클로닝된 한국형 B형 간염 바이러스(subtype adr)의 전체염기서열을 M13 파아지/dideoxy chain termination 방법으로 결정하였다. 이 바이러스의 전체 genome은 3213 bp였으며 4개의 open reading frames(S, C, P and B)를 가지고 있었다. 우리의 전체염기서열을 보고된 다른 subtype과 비교할 때 adr과는 97%, adw와는 91%, ayw와는 90%의 염기서열이 동일한 것을 알 수 있었다. 여러 subtype간에 염기서열과 아미노산서열을 비교 연구하였다. 특히 하나의 염기(T)가 더 끼어 있어 B 유전자의 reading frame이 변경되었다. Direct repeat sequence와 poly(A) addition site 그리고 enhancer element가 확인되었다. The complete nucleotide sequence of hepatitis B virus DNA(subtype adr) from a Korean patient has been determined by dideoxy chain termination method. The viral genome is 3213 base pairs long and includes four open reading frames for surface antigen, core antigen, putative DNA polymerase, and B(or X) protein of unknown function in the L strand. It is unique that one nucleotide addition altered B open reading frame. Signal sequences such as direct repeat sequence and poly(A) addition site, and enhancer element were well conserved.
반복 일축응력하의 알루미나 파괴거동에 미치는 압축응력의 영향
김기태,서정,백성기,Kim, K.T.,Shu, J.,Baik, S.K. 한국세라믹학회 1991 한국세라믹학회지 Vol.28 No.9
The effect of cyclic compressive stress on fracture responses of Al2O3 was investigated under uniaxial stress cycling. Experimental data were obtained for Al2O3 tension specimens under uniaxial tension-unloading and tension-compression cyclic loading conditions. To investigate the effect of compressive stress on the crack growth, theoretical results from the crack growth rate were compared with measured stress vs. failure relations. At low stress level in tension-compression cycling, residual tensile strains were also observed about failure time.
김기태,이태구,문승재,이재헌,Kim, Ki-Tae,Lee, Tae-Gu,Moon, Seung-Jae,Lee, Jae-Heon 한국플랜트학회 2008 플랜트 저널 Vol.4 No.2
As the operating conditions in a supercritical oxidation reactor are set in high temperature with high pressure causing a reactor suffering from the harsh circumstances. It means the reactor adopts itself with Fe-Cr alloy in acidic atmosphere with low pH value and Ni alloy in basic atmosphere with high pH value due to its superior corrosion resistance. The study, whose target waster water is pertinent to the latter part, has selected Ni alloy such as ostenite type stainless steel 304 and 316, superstainless steel AL6XN, Inconel 625, MAT 21, and titanium Gr. 5 in order to measure corrosion resistance against those samples under the same conditions of temperature and pressure applied for a supercritical oxidation reactor. The result shows the identifiable difference in corrosion resistance by observing the surface states through a scanning probe microscope as well as measuring the weight loss through making the samples above deposited in wastewater for two-week and four-week stay. The purpose of this corrosion experiment is to identify the most corrosion-resistant material among sample species pre-selected according to pH concentration of wastewater in pursue of applying for a reactor exposed to the extreme corrosion environment. It is because such a reactor made of a verified material enables to safeguard a stable operation under the supercritical wastewater processing facility.
김기태,김종성,Kim, Gi-Tae,Kim, Jong-Seong 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7
The stage 1 compaction behavior of tool steel powder under die pressing was studied. The friction effects between the powder and the die wall under different die pressing modes were also investigated. The elastoplastic constitutive equations based on the yield functions by Fleck et al. and by Shima and Oyane were implemented into a finite element program to simulate die compaction processes. Finite element calculations were compared with experimental data for densification and density distribution of tool steel powder under single and double action die pressing. Finite element calculations using the yield function by Fleck et al. agreed better with experimental data than by Shima and Oyane.