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장수용(Jang Su Yong),김학련(Kim Hak Lyun) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The electric facilities for subway stations require reliable and safe electricity in spite of their load increases rapidly. Nevertheless, Korea Electrical Safety Corporation reports that the accidents of independent electric facilities increased greatly from 4,632 cases in 1998 to 6,024 in 1999 and 6,776 cases in 2000, while the ratio of the accidents related with transformers grew gradually. As it is, it is deemed very important to minimize the spreading effects of the electric system accidents and thereby, enhance reliability of the electric supply as well as its safety. According to the fact that the electric facilities for subway stations are important for the public safety and conveniences, it should be careful to set their capacity instead of simply applying the general capacity standard to them, and thereby, improve their economy as well as prevent their accidents. With such a basic conception in mind, this study is aimed at analyzing the characteristics of the electric load in the subway stations and thereupon, suggesting some guidelines for setting of the electric facility capacity for subway stations in terms of optimal operation and safety.
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유찬주 ( Chan-ju Yu ),엄지범 ( Ji-bum Um ),장수용 ( Su-yong Jang ),김동현 ( Dong-hyun Kim ),고현석 ( Hyeon-seok Ko ),박상연 ( Sang-youn Park ) 전북대학교 농업과학기술연구소 2019 농업생명과학연구 Vol.50 No.2
This study compares and analyzes the farmers who newly introduced the cropping system of soybean-Italian rye-grass and soybean-potato and soybean-barley, which are other forage crops, and found implications and grasped technical solutions. In addition, this study examined the success, difficulties and profitability of each cropping system. The gross income of soybean and Italian rice (IRG) cropping system was 1,288,000 Won/10a. Sale price was 3,962 Won/Kg and its yield was 325kg/10a. The yield of IRG was 1,584kg/10a, and its selling price was 125 Won/Kg, leading to gross income of 198,000 Won/10a. The gross income of soybean was 284,000 Won/10a, and the income rate was 22.1%. Income of IRG was -30,000 Won/10a. The gross income of Soybean-Potato and Soybean-Barley was either other 930,000 won, 375,000 won/10a. It would be necessary to establish the technical cultivation system through the continuous researches with long term goals such as land utilization rate and grain self-sufficiency rate.
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