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RISS 인기검색어
- 검색키워드
- 저자 : 이해종 ( H. J. Lee ) (검색결과 5 건)
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이해종(H. J. Lee),최석천(S. C. Choi),이상철(S. C. Lee),이철재(C. J. Lee),정효민(H. M. Jeong),정한식(H. S. Chung) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The present study is an investigation on the characteristics of heavy load torque converter at various input speed. To get the characteristics of a torque converter, a dynamometer was used ; input speed, output speed, input torque, output torque, etc. The present experimental data were compared with other experiments, in order to ensure a reliability. The torque converter was tested for various input speed.
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농가 한우사양의 특성과 그 증식 제약요인에 대한 조사분석
이해종 ( H J Lee ) 한국축산학회 1971 한국축산학회지 Vol.13 No.1
To meet the ever increasing demand of meats in Korea, naturally we have to look to the increase of Korean cattle stock despite that its number has sharply been decreasing. To find a way to reverse the present trends in Korean cattle industry, the writer attempted a fact Ending research on the present condition of Korean cattle production and tried to analyzed the factors that might have detered the desired development of the whole enterprize. And the results are listed as follows: 1. Nearly half (approx. 47%) of the entire farms were found to be non-cattle-possessing farms, and the acreage being tilled by them was approx. 37%; from which fact it can be assumed that the smaller scale farmers tend to be the non-cattle-possessing farmers. Regionally, more cattle-possessing farms were distributed over up-land zone and to less degree around the mountain areas; the non-cattle-possessing farms were found to be in greater number around the paddy field zone and the urban area, the former being more so than the latter. 2. In keeping the Korean cattle, the farmers seemed to prefer cows (approx. 77%) with strong inclination to the matured ones (approx. 51%). The percentage of cow-calf keeping was approximately 26%. In the urban area, quite a number of bull-calf keeping could be found. Few farms were found to keep the bills (approx. 8%). 3. A characteristic feature of Korean cattle raising at the individual farms is that almost all the farms keep just single head no matter whether in the case of matured cattle (mainly cows) for the tillage use or in the case of calf for mere bringing up. Any farms that keep two heads are the cases that the matured cow, while being kept, delivered a calf, forcing the owner bring it up until sold. 4. About half (approx. 55%) the number of the non-cattle-possessing farms were found to be ones chat fell from the once cattle-possessing status because of the economic failure and the other half (approx. 45%) were known to have no experience of cattle raising whatsoever. A majority (approx. 84%) of cattle-possessing farms were found to have been raising the cattle long since with the exception of only a few cases (approx. 16%) of first experience. 5. The relation between the farmland scale and the cattle possession was that the smaller the scales of farmland, the greater the number of non-cattle-possessing farms(approx. 65% of the small scale farms had no cattle) and the larger the scales the greater the number of cattle possession. But in rare cases, even the large scale farms (4 farm 16%) were found to manage the tillage without draft cattle. 6. The number of farm hands is considered to bear upon the aspect of cattle possession. It was found out that as the number of family farm hands increases, so does the number of cattle-possessing farms. To generlize, the farms having two and less family labor-hands tend to possess no cattle, but those with three and over mostly possess cattle. 7. The reason that the non-cattle-possessing farms do not keep cattle was that they could not afford to purchase one. Even when they were given the chance to raise one, they proved to be unsuccessful in bringing it up owing to the shortage of family labor-hands (approx. 50%), the shortage of concentrates (approx. 27%) and other causes (approx. 9%). Since these factors, however, do exist also in some cases of cattle-possessing farms, they could not be taken for factors. absolutely impossible to solve. The fact was that the non-cattle-possessing farms, if provided with cattle to keep, could manage well enough to bring it up. 8. The existing cattle-possessing farms could not add more cattle to their stock mostly because their financial status could not afford for them to purchase more, and even when a supply from the exterior source could be made for them, they had a great many difficulties in raising it owing to the shortage of family labor hands (approx. 62%), the shortage of concentrates (approx. 49%) and other causes (app
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생산효율을 고려한 상자형모터회전자의 유효절삭조건에 관한 연구(Ⅱ)
이해종,김희남,하상용,신광호 한국산업안전학회 1995 한국안전학회지 Vol.10 No.2
The recent development of NC lathe and machining center have enabled automatic or unmanned manufacturing system for the improvement of production rate. And if you want to introduce automatic or unmanned manufacturing system into the cutting process of cage motor rotor, the selections of effective cutting conditions, rational tool grades and tool angles are necessary. As a result, the selection of cutting conditions, tool grades and tool angles are important factors to production rate.
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