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윤석원,B. J. Suh,D.-Y. Jung,S. Yoon,W. S. Jeon,Y. J. Kim 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
We present magnetization measurements for a single crystal of Mn12 acetate. The effects of a transverse magnetic feld Hx on the magnetization relaxation were investigated by measuring the angle dependence of the magnetization relaxation. The effect of Hx on thermally activated relaxation of the magnetization is well explained by a classical reduction of the energy barrier. By introducingan effective transverse anisotropy E, we could also explain quantitatively the dependence on Hx of the relaxation associated with resonant spin tunneling. We present magnetization measurements for a single crystal of Mn12 acetate. The effects of a transverse magnetic feld Hx on the magnetization relaxation were investigated by measuring the angle dependence of the magnetization relaxation. The effect of Hx on thermally activated relaxation of the magnetization is well explained by a classical reduction of the energy barrier. By introducingan effective transverse anisotropy E, we could also explain quantitatively the dependence on Hx of the relaxation associated with resonant spin tunneling.
행동경제이론(준거점 효과, 감정 휴리스틱 효과)에 의한 농민의 위험 성향 분석 -농작물재해보험을 중심으로-
윤석원 ( Suk Won Yoon ),정신 ( Chen Ding ) 한국축산경영학회 2012 농업경영정책연구 Vol.39 No.4
This study tries to investigate the farmer`s risk attitude by the prospect theory and affect heuristic effects in behavioral economics focused on crop insurance program. With these theories this study is trying to analyze the reasons why Korean farmers show relative low willingness to be insured. The result shows that 44.6% of the Korean farmer respondents have a specific risk attitude change. They are risk seekers when the situation is beneficial, but to be risk averse when a loss situation happens. And experienced affect is definitely influencing the farmers` perceived risk caused by the institutional flaws of crop insurance program. It also implies that the farmers` group who are living in a lower disaster frequency area with less agricultural income show the most negative affect to the crop insurance program.
윤석원 ( Yoon Suk-won ),박영복 ( Park Young-bok ) 한국유기농업학회 2002 韓國有機農業學會誌 Vol.10 No.1
This study is to analyze the demand for organic farming products. The demand for organic farming products is increasing rapidly but the study to analyze the demand system by the methods of econometrics is not tried at all because there is no any formal statistical data about the demand. Therefore, this study tries to estimate the raw statistical data to expect the demand trends of organic farming products in the future. To analyze the demand functions of organic farming products such as rice, bean, apple, grape, beef, and pork, this study uses AIDS model by using several assumptions and estimates the price and income elasticities of the demands. The results demonstrate that the demands of organic farming products will be increased in the future and the prices of organic farming products will be the key factor in the demand. In 2004, the quantity demanded of the organic grape will account for 3% of total grape market. As a result, consumer’s concerns about organic farming products will be high and the demand for organic farming products will be increased. Thus, the reasonable price system has a significant influence on the market of organic farming products.