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박정수,이수원,이부영 철도전문대학교 1992 論文集 Vol.9 No.1
컴퓨터의 성능과 작업량은 작동실시시간제어(Real Time Control)에 사용되는 단일 버스 다중처리 기능(Unibus Multi Processor)에 의하여 좌우된다. 이 Uilbbus Mulit Processor 는 고도로 신뢰할 수 있는 기능이다. 이런 형태의 시스템들은 정확한 기준을 필요로 하는 성능으로서, 작업량의 분산과 스케줄링(scheduling)을 결정하는데 중요한 영향을 준다. 이러한 효과를 연구하는 방법으로서, 사실과 가장 근접 시킬 수 있는 방법으로 추상적 페트 네트(SPM)를 이용하고, 컴퓨터 성능에 영향을 미치는 중요한 성분들을 결정하였다. 본 논문은 이러한 Stochastic Peti Nets 을 이용하여, 비트프로토클 Fault Toleraut Multi Processor의한 종류로 실험하였고, 그 결과를 시물레이션 하였음.
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박정수,이재범,김태선,조항준,김도선,이두한 대한대장항문학회 2007 Annals of Coloproctolgy Vol.23 No.5
Purpose: A lateral internal sphincterotomy (LIS) is a safe and effective surgical treatment that is the most commonly used one for patients with chronic anal fissure. However, reports on the recurrence rate and complications after LIS published in Korea are rare. The purpose of our study is to identify the types and rates of recurrence, the complications after LIS, and the differences in clinical outcomes between open and closed LIS. Methods: We used hospital records and telephone interviews to study retrospectively the rates of recurrence and complications of 898 patients who underwent a LIS for chronic anal fissure from July, 2003, to June 30, 2004. Results: There were 292 male (mean age: 36.8 years, range: 16∼84) and 606 female (mean age: 32.4 years, range: 1~68) patients. The preoperative mean maximum resting pressure in anal manommetry was 99.2 cmH2O in male patients and 97.7 cmH2O in female patients. Recurrence of fissure after LIS was present in five cases (0.6%). All underwent a LIS, on the same side of a previous LIS in four cases and on the opposite side in one case. Delayed healing of the fissure was present in six cases (0.7%). All of these patients were improved by conservative management. Complications of the LIS were thrombus formation, perianal abscess, fistula, and incontinence. Thrombus formation was present in eight cases (0.9%). Five patients underwent a thrombectomy and three patients were cured by conservative management. Perianal abscess or fistula was present in three patients (0.3%), who underwent incision and drainage or a simple fistulotomy. Incontinence was present in two cases (0.2%). One patient was lost to follow up, and the other patient was improved by conservative management. Conclusions: LIS is a safe and effective treatment for patients with chronic anal fissure, and recurrence and complications of LIS are rare.
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