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농촌지도인력이 인식한 농촌지도사업에 대한 고객의 요구 및 농촌지도기관의 업무수행수준
김진모(Jin mo Kim),전영욱(Yeong Uk Jeon),임정훈(Jung Hoon Lim),유영주(Young Ju Yoo) 한국농촌지도학회 2017 농촌지도와 개발 Vol.24 No.2
The purpose of this study was to classify the type of customer which is essential to agricultural extension service, specify their needs and identify the performance level of public agricultural extension organization by the needs of customer. To meet these purpose, we conducted a focus group interview and surveyed the agricultural extension workforce. The results of this study are as follows. First, we classify the customer of agricultural extension service as 9 types. Second, the needs by customer types are specified 12 types. Third, those who attached to Rural agricultural development administration and agricultural research and extension service organization in provinces recognize themselves as more performing organization than agricultural technology center in region, except one area.
플라이애쉬 콘크리트의 特性에 미치는 굵은 骨材 最大値數의 影響에 관한 實驗的 硏究
김덕현,유영주,이상수,송하영,김을용 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-
In this study, the experiment was carried out to investigate and analyze the influence of coarse aggregate's maximum size and Fly Ash replacements ratio on the properties of concrete. The main experimental variables were water/cement ratio 45 and 65(%), maximum size of coarse aggregate 15, 25 and 40(mm), Fly Ash replacements ratio 0, 10, 20(%). According to the test results, the principal conclusions are summarized as follows. 1) The slump and flow of fresh concrete were found to be higher in the order of maximum size of coarse aggregate 15, 25 and 40(mm), also in the order of Fly Ash replacements ratio 0, 10, 20(%). 2) The compressive strength of hardened concrete were found to be lower in the order of maximum size of coarse aggregate 15, 25 and 40(mm). While, Fly Ash replacements ratio increases in age 7days, showed tendency that compressive strength increases together. but, age 28, 56(day) were showed opposite tendency.