http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 오세철(Sea Chul Oh) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
오세철,김민호,김재문,서곤 ( Sea chul Oh,Min ho Kim,Jai moon Kim,Gon Seo ) 한국공업화학회 1995 공업화학 Vol.6 No.5
요오드 값과 디부틸프탈레이트 흡수량이 다른 네 종류의 카본블랙이 첨가된 배합고무의 물성과 배합고무와 강선의 접착 성질을 조사하였다. 20∼80phr 범위에서 카본블랙의 첨가량이 많아지면 최대토크, 경도, 모듈러스 등이 커졌으나, 카본블랙 종류의 영향은 크지 않았다. 인장강도와 인열강도도 카본블랙 첨가로 커졌으나, 요오드 값이 큰 카본블랙에서는 첨가량이 80phr 정도로 많아지면 도리어 낮아졌다. 접착세기를 나타내는 TCAT (Tire Cord Adhesion Test) 시편의 pullout force도 카본블랙의 첨가량이 많아질수록 커졌으나, 고무부착정도는 90%로 일정하였다. 배합고무의 100% 모듈러스와 pullout force간의 상관성이 높아서, 카본블랙의 첨가로 인한 접착 증진 효과는 고무의 파괴 저항력이 증진된데 기인하는 것으로 설명되었다. The effects of carbon blacks mixed to rubber compounds on various physical properties and adhesion between brass-coated wire and rubber compound were examined in this study. Four types of carbon black with various iodine numbers and dibutylphthalate absorption numbers were used. The maximum torque, hardness, and modulus increased as the mixing amount of carbon black increased in the range of 20∼80 phr. The significance of the types of carbon black to the improvement of strength was not observed. Tensile strength and tear strength were increased by adding carbon black, but decreased at 80 phr of loading level after showing maximum values for the carbon black with relatively larger iodine number. The adhesion strength evaluating by the pullout force of TCAT (Tire Cord Adhesion Test) sample was increased with increasing the amount of carbon black, but the degree of rubber coverage was almost constant as 90%. The plot of 100% modulus of rubber compound versus pullout force showed a linear relationship, indicating that the enhancement of adhesion might be caused by the fatigue resistance of rubber compound improved by carbon black.
-
-
딸기栽培農家의 技術受容에 관한 硏究 : 忠南 論山地方을 中心으로 With Reference to Nonsan County in Chungnam Province
權容大,吳世喆 충남대학교 농업과학연구소 1993 농업과학연구 Vol.20 No.2
Economic conditions of Korean agriculture have been aggravated since farmers experienced the shortage of labor, instability of farm product price. lack of capital and pressure of opening domestic market. Nevertheless. agriculture must be maintained because structure of national economy can not be progressed without balanced growth of food industry. So the problem that we must solve is to keep agriculture competitive. In that case technology is important in terms of improving productivity, overcoming labor shortage and stabilizing price. This paper is to study the technology adoption on the farm level, focusing on the theories of technology adoption, their empirical test and effect of technology adoption on the farm household income. In this study five theories - independent model, linear model, middle class conservation model. modified middle class conservation model, basic needs and wealfare model- were introduced concerning differentiated technology adoption rate by farmers' class. Based on the survey of controlled strawberry farming in Nonsan County, Chungnam Province. who adopted six kinds of technology, modified middle class conservation model was found to explain five kinds of technology adoption pattern and linear model was useful to explain one kind of technology. that is. irrigation method. These results may mean that controlled strawbary cultivators of middle class were reluctant to accept new technology. There are many variables to effect on the technology accepting rate, that is, farmer's age. labor capacity, education level, cultivation career. size of total cultivated land. and size of strawberry farming land. LOGIT model was used to find which variable influence the technology adoption rate. Results of estimation showed that variables of cultivation career and total land size. of which coefficients were statistically significant at the 5 percent level, might be main influential factors in accepting more than three farming techniques. There was a significant income difference between farm households accepting new methods and those rejecting them. Especially in case of low class of farming group, income of farmers who was adopting new technology was examined to be much higher than that of farmers who did not. adopt. This result suggests that new technology play an important role in increasing farm household income. Finally this study emphasized that there is a need to develop proper measure of technology transfer considering various socioeconomic conditions of farm households.
RISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
