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프로그램 변환 시스템의 무한 재생 변환 검출을 위한 IRD 시스템의 설계 및 구현
서흥석(Heung-suk Suh),홍대식(Dae-sik Hong),이경환(Kyung-hwan Lee) 한국정보과학회 1988 한국정보과학회 학술발표논문집 Vol.15 No.2
프로그램 변환 시스템에서 사용하는 변환 규칙들을 적용하는데 있어서 발생하기 쉬운 무한재생 변환을 시스템의 실행 시간이 과다하게 소요되는 단점이 있다. 따라서 본 논문에서는 카다로그에 포함되는 변환 규칙들에 대한 규칙 종속 그래프를 입력으로 하여 Cycle이 존재하는 규칙종속 그래프를 Cycle이 존재하지 않는 그래프로 변경 시킴으로써 무한재생 변환을 발생시킬 가능성이 있는 규칙들을 도출하는 IRD (Infinite Retrieval Detection) 시스템을 설계 구현하였다.
간동맥 화학색전술 치료를 받은 간세포암 환자의 예후와 혈청 α1 - Antitrypsin 과의 관계
손정일(Chong Il Sohn),황선호(Seon Ho Hwang),박문승(Mun Seung Park),이오영(O . Young Lee),윤병철(Byoeng Chul Yoon),함준수(Joon Soo Hahm),이민호(Min Ho Lee),기춘석(Choon Suhk Kee),박경남(Kyung Nam Park),서흥석(Heung Suk Suh) 대한내과학회 1996 대한내과학회지 Vol.50 No.3
N/A Objectives: Hepatocellular carcinoma(HCC) has a poor prognosis, and only by early detection, cure can be expected by surgery. With development of chemoembolization therapy, we may expect better survival even in the advanced HCC, There many reports about prognostic factors for HCC treated with TAE. We examined relationship between survivals and prognostic factors especially serum a 1-antitrypsin levels in patients with HCC treated with TAE. Methods: 42 patients who had been diagnosed as HCC by ultrasonography and hepatic angiography from 1987 to 1994 were examined for prognostic factors and their survival. Results: Patient's survival who had a single mass was longer (average 21 months) than that of patients who had diffuse tumor(average 4 months, p=0.005). Patient's survival without portal vein thrombosis was longer (average 16 months) than that of patients with portal vein thrombosis (average 4 months, p<0.001). Serologically, patients with low α-fetoprotein level(AFP<40ng/ml) survived longer (average 14 months) than patients with high AFP level(AFP>400ng/ml, average 4 months, p<0.001). Patients with low αl-antitrypsin level (AAT<300 mg/dl) survived longer (average 14 months) than patients with high AAT level (AAT>300mg/dl, average 4 months, p<0.001). Especially, in HCC with low AFP level (AFP<400ng/ml), patients with low AAT level (AAT<300mg/dl) survived longer(average 21 months) than patients with high AAT level (AAT>300mg/dl, average 14 months, p=0.001). Patients with Child's classification A and B showed no signigicant differences in their survival. Conclusion: Serum AAT level may be an important prognostic index in patients with HCC and especially it may be more valuable in patients who had low serum AFP level.