A laboratory threshing unit was constructed utilising a standard tangential feed ("conventional") combine cylinder, concave, beater and transition grate. This unit was used to study the phenomenon of corn cob break-up and its effect on the performance of the threshing unit. It was found that the degree of corn cob break-up was affected by cylinder peripheral speed, cylinder-concave clearance and hybrid cultivar. Within the hybrid cultivars used, increased cob break-up was associated with decreased shelling efficiency and concave separation efficiency. / The possibility of reducing kernel damage and increasing concave separation efficiency by changing some of the concave design parameters was investigated. A mathematical model of the tangential feed threshing unit was developed and used to investigate the effect of the concave design parameters. Experimental data indicated that kernel damage may be reduced by at least 24 per cent and concave separation efficiency increased by at least 38 per cent.

No description available.

京都大学 / 0048 / 新制・課程博士 / 博士(エネルギー科学) / 甲第22089号 / エネ博第397号 / 新制||エネ||76(附属図書館) / 京都大学大学院エネルギー科学研究科エネルギー応用科学専攻 / (主査)教授 宅田 裕彦, 教授 馬渕 守, 教授 藤本 仁 / 学位規則第4条第1項該当 / Doctor of Energy Science / Kyoto University / DFAM

This paper examines different foreign policies of the Republic of Korea (South Korea) towards the Democratic People’s Republic of Korea (North Korea) with regards to a peaceful reunification of the Korean Peninsula. The paper uses the theoretical framework of Social Constructivism to analyze what impact the different foreign policies of South Korea towards North Korea have had on their relations, thus providing an understanding of what impact those foreign policies have had on the peaceful reunification process of the Korean Peninsula. The paper will also look at the First Korean Nuclear Crisis, the Second Korean Nuclear Crisis, the ROKS Cheonan sinking and the shelling of Yeonpyeong, and with the help from the theoretical framework of Social Constructivism, analyze what impact those incidents have had on South Korea’s foreign policy and relations with North Korea, thus providing an understanding what impact those incidents have had on the peaceful reunification process of the Korean Peninsula.