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윤종철,손승창,서현숙 인제대학교 1985 仁濟醫學 Vol.6 No.4
저자들은 1983년 10월부터 1985년 5월까지 인제의과대학 서울백병원 치료방사선과에서 근치적 목적으로 치료한 17명의 식도암 환자에 대해서 연구 분석해 보았다. 평균 방사선 조사량은 5,240rad였고 치료한 17명 모두에서 추적조사가 가능하였고 최소 추적 기간은 6 개월이었다. 처음 진단시 원발병소별로 보면 제 1기가 2명, 제 2기가 명, 그리고 제 3기가 7명이었다. 제 1기 환자의 평균 생존 기간은 16.5개월이었고 제 2기는 11개월, 그리고 제 3기에서는 5.5개월이었다. 방사선 치료 후 증상 완화는 94%(16/17)에서 얻을 수 있었으나 방사선 치료 후 3개월 경 부터는 증상이 다시 재발되는 경향을 보였다. 평균 생존 기간에 대해서 살펴보면 TDF(Time Dose Fractionation)가 80 이상일 때 TDF 80 이하보다 더 나은 평균 생존 기간을 보였고 또한 방사선 치료 중이나 치료 후에 체중 감소가 적은 환자에서 더 오랜 평균 생존 기간을 나타내었다. 방사선 치료중 혹은 치료 후의 합병증은 기도식도천공(2명), 기도폐색(1명), 방사선폐염(1명), 그리고 대상포진(3명)이었다. This is a retrospective analysis of 17 patients with carcinoma of esophagus treated with curative radiation therapy at Seoul Paik Hospital between October 1983 and May 1985. The mean primary tumor dose was 5240 rad, There is a minimum 6 months follow up. Stage of primary lesion at diagnosia was stage 1,2 patients: stage 11, 8 patients: stage 111, 7 patients. Mean survival time for stage 1 was 16.5 months: stage 11,7 months; stage 111, 5.5 months. Palliation of symptom was achieved in a majority of patients; 94% of patients had disappearance of symptom but relapse appeared to occur after 3 months of radiotherapy. Superior results for mean survival time was achieved with more than 80 TDF (Time-Dose-Fractionation) and less weight loss during radiation. Complication during or after radiotherapy was tracheoesophageal fistula (2 patients), tracheal obstruction (1 patient), radiation penumonitis (1 patient), and herpes zoster (3 patients).
윤종철,강흥식 인제대학교 2004 仁濟論叢 Vol.19 No.1
Along with development of internet and a networking technology, security threat elements such as hacking, computer virus, Internet worm are increasing too day by day. To block these threat factor, great many firewall and intrusion detection system etc, were developed. However, can not depart in all threats even though introduce these security system. There is fundamental limit that a present server security technology because operate in application level, can have bug that can trench, and does not protect oneself if system encounters hacking. However, it is network base intrusion detection system that do essential indispensability in composition of network system that can come to foundation of this operating system. In this paper, study intrusion detection system of network base faithfully and does for that purpose that embody directly.
Impact of Shale Oil Supply Shock on US Crude Oil and Gasoline Prices
윤종철,김준,제상영 한국산업경제학회 2018 산업경제연구 Vol.31 No.4
This paper examines the effect of shale oil production on US energy market. According to an efficient market hypothesis, the increasing crude oil supply due to shale oil production affects gasoline supply and lowers gasoline prices. However, previous studies have explained that shale oil supply shock does not extend to gasoline. Therefore, we estimate the effect of shale oil supply on oil price and gasoline price using VECM. The result of the analysis, in the United States, since the crude oil supply and inventory increase due to increasing shale oil production and crude oil export ban, the effect of shale oil for oil prices has increased. In addition, as shale oil production increased, the effect of gasoline inventory for gasoline prices decreases and the impact of self-shock on gasoline prices increases. In other words, shale oil affects the oil prices but does not affect the gasoline prices.