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G - , C - banding Technique 에 의한 한국산 청서(Sciurus vulgaris)와 다람쥐(lamias sibiricus)의 핵형분석
이희영,김종봉 한국유전학회 1986 Genes & Genomics Vol.8 No.4
한국산 청서와 다람쥐의 핵형을 일반 Giemsa stain과 G-banding stain 및 C-banding stain 방법으로 분석하였다. 청서의 염색체 수는 2n=40이었으며 이 중 6쌍은 metacentric, 8쌍은 submetacentric, 3쌍은 subtelocentric, 2쌍은 telocentric chromosome이었고 X와 Y염색체 모두 submetacentric chromosome이었다. 다람쥐의 염색체 수는 2n=38이었으며 이 중 3쌍은 metacentric, 4쌍은 submetacentric, 5쌍은 subtelocentric, 6쌍은 telocentric chromosome이었고 X염색체는 submetacentric, Y염색체는 metacentric chromosome이었다. 두종의 G-banding pattern을 비교 분석한 결과 일부 염색체들(청서의 2,3,6,7,10,11,12번과 다람쥐의 1,3,5,7,10,11,12번)의 banding pattern이 서로 같았다. C-banding에서는 청서의 각 경우 대부분 centromere와 telomere부위에 이질염색질이 분포하였고, 다람쥐에서는 centromere 부위에 주로 이질염색질이 분포하였다.
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이희영 한국컴퓨터산업학회 2001 컴퓨터産業敎育學會論文誌 Vol.2 No.8
본 논문에서는 퍼지수리계획법에 의한 최적화 문제의 해 분석에 ASP(Active Server Page)를 적용한 알고리즘을 제시하였다. 수리문제에서 목적함수의 목표와 제약조건의 만족도레벨의 애매성을 다루는데 있어서 퍼지 이론은 강력한 도구가 되고 있다. 제시한 알고리즘은 IEEE-30모선 시스템을 이용하여 유효성을 검증하였다. ASP(Active Server Page) is adopted in searching optimal solution for VAR planning algorithm by FUZZY mathemathical programming. FUZZY theory is powerful tool dealing with the fuzziness of satisfaction levels of the constraints and the goal of objective funnctions. The effectivness of the proposed algorithm has been verifyed by the test on the IEEE-30 bus system.
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CLINICAL EXPERIENCES OF VASOVASOSTOMIES
이희영,Lee, Hee-Yong The Korean Society for Reproductive Medicine 1975 Clinical and Experimental Reproductive Medicine Vol.2 No.1
A total of 185 vasovasostomies were carried out for 11 years. Various factors which are of importance in fluencing the successful vasovasostomies are analysed and presented as follows: In recent years, demand of reanastomosis of the vas deferens increased considerably. An average age of the subjects is 39, and that of their wives, 33 in this series. An average interval between vasectomy and vasovasostomy is 4 years. An average number of living chidren is 2.6 at the time of vasectomy. and 2.1 at the time of time of vasovasostomy. Merchant and public official are the most commonly encounterd occupation in the present series. Coital frequencies are 2.2/week after vasovasostomy. The most common reasons for requesting the vasovasostomy are remarriage and deaths of children, especially son. Success rate is considerably higher among younger group than that of the older. Success rate is somewhat higher among groups of shorter interval between the operations (vasectomy and vasovasostomy) than that of longer interval group. Success rate is higher among bilateral vasovasostomy group than that of any others. Success rate is higher in solid splint group and no splint group than hollow splint group. The closed dressing technique of the end of splint on the scrotum is found to be reasonably effective in preventing infection. Ordinary end-to-end anastomosis and folded side-to-side anastomosis techniques are proved to be the most ideal form of modified operation for the successful vasovasostomies. The most common causes of failure are infection, injuries of blood supply, avascular necrosis due to extensive mobilization, inadequate approximation of both vasal end, hematoma, changes of epididymal environment, and early ambulation in this series. Overall success rate of the author's series is found the 81 per cent, and impregnation rate is 35 per cent. Overall results reported by other workers are that success rate regarding appearance of sperm in the semen after operation is 64 per cent, and that of impregnation after vasovasostomy is 33 per cent. The results of semen assessment performed on same cases prior to vasectomy and following vasovasostomy showed that post-vasovasostomy sperm count scarcely reached three-quaters of pre-vasectomy count.
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개선된 GUI기반의 전력조류분석용 소프트웨어개발에 관한 연구
이희영 한국컴퓨터산업학회 2003 컴퓨터産業敎育學會論文誌 Vol.4 No.10
본 논문에서는 상정사고를 감안한 개선된 GUI기반의 전력계통의 조류해석 도구를 제시하였다. 제시한 툴은 전력계통의 조류계산의 교수 및 학습을 돕는 효과적인 도구이다. 이 소프트웨어는 Asymetrix사의 ToolBookII로 개발하였으며 명칭을 PFGUI(Power Flow GUI)로 정하였다. PFGUI는 입력매개변수와 그 결과간의 관계성을 테이블 형태가 아닌 시각적인 그림으로 보여 주기 때문에 전력계통운용및 제어의 연구에 더욱 친화적이다 PFGUI는 선로탈락시의 조류계산 출력을 계통구성도상에 같이 나타내도록 하였다. 사용자들은 계동도강에서 조류계산의 시스템 데이터를 입력하고 손쉽게 모선의 전압과 전력, 선로조류에 대한 결과도를 확인 할 수 있다. 또한 선로전압조정기, 콘덴서, 부하레벨, 선로탈락 등의 다양한 형태의 영향을 파악할 수 있다. 제안된 PFGUI는 Ward-Hale 6-Bus 계통을 연구대상으로 하였다. This paper presents improved GUI based analysis tool o( load flow of power system (or contingency. It is effective tool to facilitate the teaching and learning of load flow of power system. This software is the named of PFGUI(Power Flow GUI) that written in TooIBookII of Asymetrix. The PFGUI is friendly for study for power system operation and control because picture provide a better visualizing of relationships between input parameters and effects than a tabula type result. This PFGUI enables topology and the output data of load flow for line outages to be shown on same picture page. Users can input the system data for power flow on the the picture and can easily see the the result diagram of bus voltage, bus power, line flow. It is also observe the effects of different types of variation of tap, shunt capacitor, loads level, line outages. Proposed PFGUI has been studied on the Ward-Hale 6-Bus system.
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이희영,이상호 한국농공학회 1987 한국농공학회논문집 Vol.29 No.2
Because the development of Korea's water resources will reach its limit in the near future, preparations should now be begun to deal with problems that may come as a result. It will be too late to start preparations when the water resources have already reach their limitation and, as the preparations cannot be done in a day, it will take a long time to provide them. Now is the great turning point to accumulate our technical experiences and attain our plans gradually. The preparations against this are summarized as follows; 1)The transitory use of water should be turn into the recurrent use for the future. 2)A cooperative water control system of an area should be arranged. 3)Water saving, control of water demand, and the multiple use of water should be encouraged. To do this effectively, people should be informed of the value and rarity of water. 4)The development of freshwater reserviors at estuaries is closely related to the development of water utilization in the whole river basin. The development of water resources by the construction of freshwater reservoirs at the estuaries should be started, when the development of upstream water resources reaches their limitation. 5)The existing water utilization structures should be reorganized by water resources exchange planning, so the effective use of water in large areas be attained.
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