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김상우 ( Kim Sang Woo ),심문산 ( Sim Moon San ),정진호 ( Jung Jin Ho ),이철주 ( Lee Chul Ju ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
Among the total of 17,764 agricultural reservoirs in Korea, KRC manages 3,324 agricultural reservoirs and the remainder come under the direct control of the municipalities. The ability of the agricultural reservoir supply is being rapidly decreased in many areas due to the indraft of a sedimentation as well as the deterioration of structures. In comparison with the initial ability of the agricultural reservoir supply, It was found that 88 percent of them built prior to the 1970s has a marked change caused by a drainage basin-condition, including a change of the command area and a sedimentation. This study, Analysis on ability of the agricultural reservoir supply, takes 2,673 agricultural reservoirs as a research target which are under management of KRC and have their own catchment area and command area. The main object are to estimate the water supply potential of reservoirs used for agricultural purpose and to understand the optimum water supply levels of them.
Quantum Dot LED를 이용한 상추 주요 병원성 곰팡이 및 세균의 생장억제효과 기내실험
이현구(Hyun-Goo Lee),김상우(Sang-Woo Kim),마헤시 아드히카리(Mahesh Adhikari),순 쿠말 구룽(Sun Kumar Gurung),세투 바지에(Setu Bazie),산 꼬설(San Kosol),권병헌(Byeong-Heon Gwon),주한준(Han-Jun Ju),고영욱(Young-Wook Ko),김용득(Yong-Duk Kim),유 한국식물병리학회 2019 식물병연구 Vol.25 No.3
QD LED has an ideal light source for growing crops and can also be used to control plant pathogenic microorganisms. The mycelial growth inhibition effect of QD LED light on Rhizoctonia solani, Phytophthora drechsleri, Sclerotinia sclerotiorum, Sclerotinia minor, Botrytis cinerea, Fusarium oxysporum, Pectobacterium carotovorum, and Xanthomonas campestris were investigated. According to the results, BLUE (450 nm) light, suppressed S. sclerotiorum by 16.7% at 50 cm height from the light source, and 94.1% mycelial growth at 30 cm height. Mycelial growth of Sclerotinia minor was inhibited by 80.4% at 50 cm height and 36.3% at 50 cm height in B. cinerea. S. minor, and B. cinerea was inhibited by 100% mycelial growth at a height of 30 cm from the light source. At 15 cm height, all three pathogens (B. cinerea, S. minor, and S. sclerotiorum) was inhibited by 100%. QD RED (M1) and QD RED (M2) light suppressed mycelial growth of S. minor and B. cinerea by 100% at 30 cm and 15 cm height from the light source. For S. sclerotiorum, QD RED (M1) and QD RED (M2) showed 75.2% and 100% inhibition, respectively. Further experiment was conducted to know the suppression effect of lights after inoculating the fungal pathogens on lettuce crop. According to the results, QD RED (M2) suppressed the S. sclerotiorum by 59.9%. In addition, Blue (450 nm), QD RED (M1), and QD RED (M2) light reduce the infestation by 59.9%. In case of B. cinerea, disease reduction was found 84% by BLUE (450 nm) light. Results suggest that the growth inhibition of mycelium increases by Quantum dot LED light.
다중 Chirp Spread Spectrum 노드를 위한 충돌 방지 알고리즘
이영훈(Younghun Lee),조현우(Hyeonwoo Cho),김상우(San Woo Kim) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
본 논문의 주제는 다중의 Chirp Spread Spectrum (CSS) node의 충돌 방지 알고리즘에 관한 논문이다. 실내 환경에서 모바일 로봇에 대한 위치추정의 정확도를 향상시키는 연구가 진행 중이며 다중 로봇에 대한 연구 역사 요구된다. CSS는 IEEE 802. 15. 4a에 정의된 표준 중 하나로서 거리측정이 가능하며 다중경로에 강인한 통신 방식이다. 다수의 로봇들이 동시에 하나의 채널을 이용하여 거리측정을 시도할 경우 충돌이 발생하게 되며 이를 방지하기 위한 알고리즘이 필요하다. 제안한 알고리즘 각 로봇의 거리측정 성공 확률을 제어할 수 있다. 본 논문은 제안된 방법의 타당성을 수학적으로 분석하고 실험을 통하여 검증하였다. 또한 다중 물체의 위치추정 알고리즘에 적용 가능성을 평가한다.