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이승규,김경희,이총규,김동원,황진현 한국식물병리학회 2004 식물병연구 Vol.10 No.4
A rust fungus has caused a serious early defoliation of Zanthoxylum schinifolium during growing seasons very year at the plantations located at Hadong and Jinju, Kyeongsangnam-Do in Korea. In order to identify the rust fungus and clarify its life cycle in Korea, aeciospores from Pinus thunbergii were artificially inoculated on the leaves of Z. schinifolium. Uredinial stage was successively formed on the leaves of Z. schinifolium. Based on the artificial inoculation test and on the morphological features of the dried specimens collected from P. thunbergii and Z. schinifolium, this rust fungus was identified as Coleosporium xanthoxyli. Morphological features of aecial and uredinial stages of the species were described. The first symptom of the infection as developed from later June to early July. And leaf infection ratio was 17.8%-58.7% during August at adong and Jinju regions of Kyeongsangnam-Do in Korea.
축류(軸流) 콤바인의 개발(開發)에 관(關)한 기초(基礎) 연구(硏究)(II) - 탈립과정(?粒過程)의 수학적(數學的) 모형(模型) 개발(開發) -
이승규,우종구,김성태,Lee, S.K.,Woo, J.K,Kim, S.T. 한국농업기계학회 1991 바이오시스템공학 Vol.16 No.1
This study was carried out getting basic data for developing a new combine which is suitable for the cultivating situation in Korea or Southeast Asia. The relation of the amount of unthreshed grains and the axial displacement of crop in threshing process was attempted to formulate mathematically in a threshing chamber of axial-flow threshing unit. It was found that unthreshed grain is an exponetially-decaying functon of axial displacement of grains based on available data. Threshing experiments were performed to validate the mathematical model by changing various levels of pertinent variables for malting barley. Good correlation were obtained between the theoretical calculation and observed data for various test conditions, such as inclination, vane pitch, concave length, drum speed, feeding velocity, stream weight, moisture content. Therefore the model can be used for general purpose to find the amount of unthreshed grain if the mean rate of occurence of threshing of kernels(${\lambda}_{\tau}$) is properly calibrated considering some other operating conditions and crop conditions which are not involved in this analysis.