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李光直,咸德相 慶北大學校 醫科大學 1963 慶北醫大誌 Vol.4 No.1
Auther has carried histological and histo-chemical studies on the impulse conducting system of the heart of the dog. The results are summarized as follow: (1)Specific muscle fibers were observed by histological method which showed strong positive acid phosphatase reaction and marked defference from proper muscle fibers. (2)Alkaline phosphatase was negative in both tissues. (3)In the ganglion cells of the A-V bundle, acid phosphatase was strongly positive but alkaline phosphatase was negative.
이광직,김주홍 한국조명전기설비학회 1995 조명.전기설비 Vol.9 No.4
In the analysis of characteristic behaviors of a real transformer with coupling coefficient K is less than 1, this paper presents the more accurate and practical profits than the traditional analysis of the transformer treated as K∼1. This results from the use of the coupling coefficient type equivalent circuit of the transformer which includes K as positive parameter. Furthermore, a leakage transformer is analyzed in a unified method and the results of analysis are consistent with the practical measurements of the transformer. By using the above equivalent circuit, the characteristics referred to the load side are expressed as Thevenin voltage source and the leakage inductor (1-K2)L2. Therefore, these analysis about the output voltage and the damping factor in the transient state which are affected by the leakage inductor are confirmed to be an effective method.
결합계수 해석에 의한 유도가열용 인버터의 공진회로 설계법
이광직,김주홍 한국조명전기설비학회 1997 조명.전기설비 Vol.11 No.6
고주파 유도가열을 위한 인버터의 공진회로 설계에서 인덕턴스 L의 작용과, 출력전달 요소로 사용된 변압기의 결합계수, 그리고 코일을 사용한 가열부하의 결합계수가 공진회로의 출력, 회로의 Q와 공진주파수에 큰 영향을 주고 있음을 등가회로를 도출하여 그 특성을 해석하였다. 또한 변압기를 테브난 등가회로로 구성할 경우, 변압기의 이차측 임피던스를 일차측 임피던스고 환산하면, 권선비 n$^2$에 비례 할 뿐만 아니라 결합계수 $K^2$에도 비례함을 도출하여 결합계수형 테브난 등가회로에 의한 정확성이 큰 인버터 공진회로 설계의 기초방식을 나타냈다. In designing a resonant circuit of the inverter which puts induction heating with high frequency to the load, an inductance L of the circuit, the coupling coefficient of a transformer transfering the output power to load, and the coupling coefficient of load circuit heating with coil affect to the output power of a resonant circuit, the circuit Q and the frequency. Those characteristics of the circuit are analyzed through Thevenan's equivalent circuit of the coupling coefficient type which is derived from the T-type equivalent circuit of a transformer. On this equivalent circuit, the impedance of a transformer referred to its primary side is not only proportional the square of turn ratio, nZ, but also the square of coupling coefficient, K2 This paper proposed a more accurate fundamental method to design a resonant circuit of the inverter by using the Thevenan's equivalent circuit.
畓義作 靑刈胡麥의 刈取時期와 窒素施用水準이 收量과 營養成分 含量에 미치는 影響
李光稙 건국대학교 1979 論文集 Vol.10 No.1
This trial was objected to study about the effect of harvesting stage and nitrogen application level on the yield and chemical component of rye grown on paddy field, and the effect of harvesting stage and pre-wilting on the quality of the rye silage. It was conducted from October 1977 to June 1978 and the obtained results are summarized as follows. 1.Both fresh weight and dry matter yield were increased with high significance as the harvesting date was delayed. 2.As the nitrogen fertilizing level raised, fresh weight and dry matter yield were increased with high significance. 3.Concerned with the dry matter yield between different nitrogen level within a harvesting stage, there were no significant difference between treatment at April 21s1, significant. (P≤0.05) difference between treatment 1 and 3at May 1st and between treatment 1 and 2at May 11 th, and highly significant (P≤0.01) difference between treatment 1 and 3 at May 11 th. 4.As the harvesting stage delayed, the crude protein content of fresh herbage decreased and crude fiber increased. 5.The quality of silage made from all treatment were good except one made from the treatment harvested at May 1st and pre-wilted, which was cut coarsely with a straw cutter instead of an ordinary silage chopper due to electrical stoppage. 6.The content of lactic acid and NH3-N were decreased and pH increased as the maturity of material progressed. 7.It should be paid more attention to good chopping of the material than any other factor, to make good silage with rye.