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이길홍 서울産業大學校 2001 논문집 Vol.52 No.1
광 데이터 통신망은 현재의 전송망을 대치할 믿을 만한 새로운 기술로 받아들여지고 있다. 현재 WAN 영역에서는 WDM 기반 광 버스트 스위칭 기술이 연구되고 개발되고 있는 단계이다. LAN 영역에서는 중간에 지연이 적은 처리를 요구하는 간단하면서도 효율적인 전송시스템이 필요하다. 본 논문에서는 WDM 기반 LAN 환경에서 단말의 구조를 단순화시킨 간단한 동작 메커니즘을 제시한다. 시뮬레이션 결과를 제시하고 구현 환경에 대한 논의도 함께 다룬다. Optical data network has been recognized as a promising and applied technology that can be used for replacing current transport network architecture. Currently, optical burst switching system using WDM technology is developed and studied strongly in the WAN area. In the LAN area, a simple and efficient transmission system with low processing delay at the intermediate system is required. In this paper, a WDM-based simple media access scheme is presented in local optical access environments. Some simulation results are presented and implementation environment discussions are also presented.
우울증 환자에서 Amitripgyline 혈중 농도와 치료반응 및 부작용과의 관계
김도선,박두병,이길홍 大韓神經精神醫學會 1992 신경정신의학 Vol.31 No.1
In this study we tried to elucidate the relationship between steady-state serum levels of amitriptyline along with its active metabolite nortriptyline, therapeutic responses and side effects. Twenty inpatients. who were, at different times, admitted to the Department of Neuropsychiatry. Chung-Ang University Hospital sometime between 1990. 1. 1 and 1991.6.30 and who met the DSM-III-R criteria for major depression and treated with amitriptyline for at least 4 weeks, were selected. Serum levels of tricyclic antidepressant. depression score and side effect score were measured at the time of admission, first, second, third and fourth week of treatment respectively. The results of the study were as follows : 1) Baseline and next 4 weekly Hamilton rating scores for depression were 32.65±5.82, 24.10±7.13, 19.15±5.88, 14.65±5.30 and 11.05±5.03 respectively. These results show significant difference according to the therapeutic period. 2) Weekly side effect scores were 13.35±5.19. 10.05±4.39. 7.60±2.99 and 5.50±2.60. There is significant difference in side effect scores according to the therapeutic period. 3) The combined mean serum levels of amitriptyline and nortriptyline of 17 responders was 187.86±72.69ng/ml, and that of 3 nonresponders was 221.74±56.56. These results show no significant difference. 4) There are no correlations between TCA serum levels and clinical responses or side effects except at third week.
李吉弘,李炫珪,朴昌宣 朝鮮大學校 動力資源硏究所 1982 動力資源硏究所誌 Vol.4 No.1
The Purpose of this study was to obtain suitable bench time by measuring Comperssive strength and surface stability of new sand and return sand of furan resin pattern. The results obtained in this study are summarized as follows. (1) SuitabIe bench time of new sand and return sand by the mixing ratio of resin and hardening agent was 25 to 38 minutes in new sand and 6 to 12 minutes in return sand. (2) In the return sand system the amount of resin addition wasenough to about 1/2 of new sand and was vcry economical. (3) Hardening velocity of return sand was very quick, therefore molding shonld quickly be done because bench time is short.