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백세용(Se-Yong Paek),박순동(Soon-Dong Park),원유헌(Yoo-Hun Won) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.2
지역 최적화는 컴파일러 후단분에서 튜플 형태이고 추상기계 대한 코드인 TUP 코드의 임시변수 수를 감소시킴으로써 전체 중간 코드의 크기를 줄이고, 실행 시간을 감소시킨다. 이렇게 함으로써 레지스터 할당과 기계어 코드 생성을 보다 효율적으로 수행할 수 있다. 본 연구에서는 지역 최적화 기법으로 중복 수식 제거(common subexpression elimination), 복사 전파(copy propagation), 상수 중첩(constant folding)을 사용하여 지역 최적화를 구현하였다.
백세진,이길연,송기환,유창식 대한대장항문학회 2018 Annals of Coloproctolgy Vol.34 No.6
Purpose: Inflammatory bowel disease (IBD) in Korea has been increasing in recent years, but accurate statistics about operations for IBD are lacking. The purpose of this study was to investigate the trends and current status of IBD surgeries in Korea. Methods: Using a national database from the Korea Health Insurance Review and Assessment Service, we analyzed data from patients who underwent surgery for Crohn disease and ulcerative colitis from January 2009 to October 2016. Results: The mean number of patients who underwent surgery for Crohn disease was 791.8 per year. Colorectal surgery, small bowel surgery, and anal surgery were performed fairly often (31.2%, 29.4%, 39.4%, respectively), and laparoscopic surgery continued to increase, recently exceeding 30%. About 50% of Crohn patients used biologics before and after surgery, and those patients also underwent a relatively high rate of anal surgeries (44.2%). The mean number of patients who underwent surgery for ulcerative colitis was 247.6 per year. Colorectal surgery accounted for more than half of all operations, and laparoscopic surgery has been increasing rapidly, having been performed in about 60% of patients in recent years. The incidence of colorectal cancer in patients with ulcerative colitis was very high and increased rapidly during the study period, reaching about 80%. Conclusion: The number of patients undergoing laparoscopic surgery for IBD in Korea has increased significantly. Biologics are actively used by patients with Crohn disease, with a high proportion of anal surgeries required. Many of the surgical indications for ulcerative colitis have shifted into colorectal cancer.