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기상변화에 따른 농업용수 부족가능성 분석 : 고성군 대가저수지 사례
안병일(Byeong-Il Ahn),조영득(Young-Deuk Jo),김태훈(Tae-Hun Kim),권용덕(Young-Duk Kwon) 한국농업경제학회 2009 農業經濟硏究 Vol.50 No.2
This paper estimates the probability distribution of the excess demand of water on the paddy field in Goseong Gun. Very severe drought in 1992 had urged Korean government to make a fresh water lake named Madong for suppling agricultural water by building a see wall in Danghangman of south coast in Korea. However, water demand as well as the capacity of water supply of exist-ing reservoir had not been explored before the planning of Mandong lake. This caused a campaign against the project of making fresh water lake. For evaluating the validity of the project, this pa-per examines the daily volume of water during 1992~2008 in Gaega reservoir which is the largest water source in the Goseong Gun. Daily agricultural water demand for the same period is estimated using Rural Agricultural Water Resource Information System. Based on the calculated excess demand of agricultural water, we estimate Kernel density of water shortage. The estimated probability of water shortage in Daega-area is between 10 and 29 percents.
조재환 ( Jae Hwan Cho ),이정환 ( Jung Hwan Lee ),조영득 ( Young Deuk Jo ) 한국농업경제학회 2011 農業經濟硏究 Vol.52 No.3
A Linear Approximated Inverse Almost Ideal Demand System suggested by Eales and Unnevehr was estimated using monthly data of beef carcass grades in Korea. LA/IAIDS consists of 5 demand equations of Korean beef carcass for Hanwoo 1 and over, 1, 2, 3 grades and Beef Cattle. The results showed that price flexibility and scale flexibility are both negative, as we expected. The responses of Korean beef price to 1% increase in imported beef quantity were 0.04~0.2% decline in low-grade beefs while 0.02~0.08% increase in Hanwoo high-grade beef. We also found that both own-price flexibility and scale flexibility of high-grade beef are much greater than those of low-grade beef. This implies that Hanwoo cattle farmer might be in the face of deficit operation due to long-term fattening with high-grade beef price plummeted, if the number of Hanwoo cattle continues to increase much faster than before.
순기활혈탕(順氣活血湯)의 뇌허혈(腦虛血) 억제효과(抑制效果)에 관한 실험적(實驗的) 연구(硏究)
홍석,안정조,전상윤,최창원,정영득,Hong, Seok,Ann, Jeong-Jo,Jeong, Sang-Yoon,Choi, Chang-Won,Jeong, Young-Deuk 대한한의학방제학회 2005 大韓韓醫學方劑學會誌 Vol.13 No.1
This Study was designed to investigate the effect of Sunkihwalhyul -Tang extract(SHT) on the change of cerebral hemodynamics [regional cerebral blood flow(rCBF), pial arterial diameter(PAD) and mean arterial blood pressure(MABP)] in normal and cerebral ischemic rats, and further to determine the mechanisms of action of SHT on hemodynamics. In addition, this study was designed to investigate whether SHT inhibits lactate dehydrog enase(LDH) activity in neuronal cells and cytokines production in serum of cerebral ischemic rats. The results were as follows 1. SHT significantly increased rCBF and PAD in a dose-dependent manner, but MABP was not changed by injecting SHT. These results suggest that SHT significantly increases rCBF by dilating PAD. 2. The SHT-induced increase in rCBF was significantly inhibited by pretreatment with indomethacin(IDN, 1 mg/kg, i.p.), an inhibitor of cyclooxygenase and methylene blue(MTB, $10{\mu}g/kg$, i.p.), an inhibitor of guanylate cyclase. 3. The SHT-induced dilation in PAD was significantly inhibited by pretreatment with IDN and MTB. 4. The SHT-induced some increase in MABP was significantly increased by pretreatment with IDN. These results suggest that the mechanism of action of SBT is mediated by guanylate cyclase. 5. Both rCBF and PAD were significantly and stably increased by SHT(10 mg/kg, i.p.) during the period of cerebral reperfusion, which contrasted with the findings of rapid and marked increase in control group. 6. SBH significantly inhibited LDH activity in neuronal cells. These results suggest that SHT prevents the neuronal death. 7. In cytokine production in the senlm drawn from femoral artery 1 hr after middlecerebral arterial occlusion, sample group showed significantly decreased production of IL-1$\beta$ production, decreased production TNF-$\alpha$ and increased Production of IL-10 compared with control group. 8. In cytokine production in the serum drawn femoral artery 1 hr after reperfusion, sample group showed significantly decreased production of IL-1$\beta$ and TNF-$\alpha$ as wellas significantly increased production of IL10 compared with control group. These results suggest that SHT mediated by guanylate cyclase has inhibitive effect on the brain damage by inhibiting LDH activity, IL-1$\beta$ and TNF-$\alpha$ production, and by accelerating IL-10 production. The present author thinks that SHT has an anti-ischemic effects through the improvement of cerebral hemodynamics and inhibitive enects on the brain damage.