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연구논문(硏究論文) : 시비수준과 차광처리가 자생 Thalictrum속 식물의 유묘생장에 미치는 영향
이완희 ( Wan Hee Lee ),이승연 ( Seung Youn Lee ),강정화 ( Jung Hwa Kang ),이택주 ( Taek Joo Lee ),김기선 ( Ki Sun Kim ) 한국환경복원기술학회 2015 한국환경복원기술학회지 Vol.18 No.1
Thalictrum species belongs to the Ranunculaceae and are perennial landscape plants which are available in the garden and potted plants. This experiment was conducted to find out the basic data for the growth effects of fertilizer levels and shading rate in seedling plug cell tray in the Thalictrum rochebrunianum, T. uchiyamai and T. coreanum. For T. rochebrunianum and T. uchiyamai, growth increased by all fertilizer level treatments as compared to non-treatment. Hyponex 1000 times of treatment showed the highest growth. All growth increased in 35% shading as compared to other treatments for T. rochebrunianum and T. coreanum. But, for T. uchiyamai growth increased in 55% shading. In general, growth of three Thalictrum species was worse in 75% shading, as compared to other shading rates. Based on the results, Thalictrum species seedling can be produced by 35-55% shading and fertilization of Hyponex 1000 times by using plug tray.
표면 탄성파 장치를 응용한 용량 성 변위센서의 설계 및 초정밀 간극 측정
김재근(Kim, Jae-Geun),이택주(Lee, Taek-Joo),임수철(Lim, Soo-Cheol),박노철(Park, No-Cheol),박영필(Park, Young-Pil),박경수(Park, Kyoung-Su) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.5
SAW device is widely used as band pass filters, chemical or physical sensors, and actuators. In this paper, we propose the capacitive gap measurement system with high precision using SAW device. The research process is mainly composed of theoretical and experimental part. In the theoretical part, equivalent circuit model was used to predict the SAW response by the change of load impedance. In the experimental part, commercialized capacitor was used to see the SAW response by the change of load capacitance to check the feasibility as a sensor unit. After that, experimental setup to measure and adjust the gap was made and the SAW response by the change of gap which caused the capacitance change was measured. Finally, resolution and stroke was decided compared with the signal change and basic measurement noise level.