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김수태(soo Tae Kim),이건욱(Kuhn Uk Lee),김건표(Keon Pyo Kim),강한성(Han Sung Kang) 대한소화기학회 1993 대한소화기학회지 Vol.25 No.6
N/A To clarify the clinical features and prognostic factors on hepatic resection of intrahepatic cholangiocarcinoma, we studied them in 27 cases during last 8 years from Jan. 1985 to Dec. 1991. Of 27 patients, the mean age was 54.8 years old, and male to female ratio was 4.4: 1. 22.2% of the patients were positive for HBsAg. and 52.1%. positive for anti HBc (IgG). Alpha-fetoprotein was elevated in 7 cases (26.9%) and CEA was increased in 71.4% of the patients. The liver cirrhosis was associated with 5 cases (18.5%) and Clonorchis sinensis infection rate was 11.1% The overall postoperative mortality and morbidity rate were 11% and 33% respectively in 27 patients with hepatic resection. The 4 prognostic factors (curative resection or not, tumor size, tumor number and preperative Child's classification) were evaluated analytically. The curative resection and Child A group survived longer than palliative resection and Child B. C group(p<0.01). But tumor size and number were not significant prognostic factors (p>0.05). The 1 year-and 3 year survival rates in curative resection group were 78% and 54%. As intrahepatic cholangiocarcinoma grows slowly and is less associated with liver cirrhosis, early detection and curative resection may be the best way to treat it.
자기력 분포에 따른 자유곡면의 자기연마 특성에 관한 연구
곽재섭(Jae-Seob Kwak),곽태경(Tae-Kyung Kwak),김태희(Tae-Hui Kim),강한성(Han-Sung Kang),최해운(Hae-Un Choi) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
This study aimed to develop a magnetic array table and control the polarity of electro-magnets so that the magnetic force could be increased for the magnetic abrasive polishing (MAP) of free form surface. The distribution of the magnetic flux density according to the configuration of the electro-magnets under the workpiece was simulated and the improvement of the surface roughness was verified in the MAP experiments of free form surface.
상자성체의 자기연마에서 겔 자기연마 입자의 효율성 검증에 관한 연구
곽재섭(Jae-Seob Kwak),유만희(Man-Hee You),이성호(Sung-Ho Lee),강한성(Han-Sung Kang) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Unbounded magnetic abrasives have been used in magnetic abrasive polishing because of low cost. However, these magnetic abrasives show machining efficiency in the negative, especially in a case of application in lower-permeability materials, since abrasives could easily break away from magnetic field according to increase of spindle speed. To solve this problem, in this study, silicone gel medium that is mixed with unbounded magnetic abrasives is applied for verifying the surface roughness improvement of paramagnet materials and preventing the chemical reaction on the working surface.