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강성수,조성근,Kang, Sung-Soo,Cho, Seong-Keun 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.6
To achieve the structural safety of the vehicle, designs in various cases are carried out by using CATIA program. It is promoted the relaxation of stresses by collisions from the front portion, the side part and the rear portion of the vehicle. In this study, we conduct a variety of design of frames for the light weight frame of the vehicle and structural analysis, to protect the driver by adding reinforced frame. In the case of such a collision, there are maximum stresses greater than yield strength of steel and a very large local plastic deformation at the collision part.
시설재배지에 질소관비 농도가 오이생육과 질산태 질소에 미치는 영향
강성수(Seong Soo Kang),김명숙(Myung Sook Kim),공명석(Myung Seok Kong),김유학(Yoo Hak Kim),오택근(Taek-Keun Oh),이창훈(Chang Hoon Lee) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.4
To evaluate the impact of nitrogen fertigation on crop growth and NO3-N concentration in the soil solution, field experiment for cucumber cultivation during spring and fall season were carried out in on-farm located in Byeongcheon-myeon, Chunan-si, Chungcheonnam-do. Supplying nitrogen of 120-150 mg/L by fertigation device into soil per week reached to maximum yields of cucumber fruits. However, cucumber growth did not show any significant difference between nitrogen levels. Nitrogen supply of 400 mg/L, highest N levels, did not affect cucumber growth. Difference between green values of cucumber leaves using RGB scores were closely related with cucumber yields, and therefore, this results suggests that green values of cucumber leaves could be used as a way of determining the application rates of nitrogen for cucumber cultivation period under fertigation system.