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최병익,엄윤용 대한기계학회 1985 대한기계학회논문집 Vol.9 No.1
Using the tensor elastic Green functions an exact integral equation is formulated for two anisotropic precipitates embedded in an infinite anisotropic matrix; the matrix is subjected to an applied strain field or the precipitates undergo a stress-free transformation strain. This equation is reduced to an infinite system of algebraic equations by expanding the strains in Taylor series about the two points within each precipitate, and an approximation of the strain distributions within the two spherical precipitates is obtained by truncating the higher order terms. Since the present method requires no symmetry conditio between the two shperical precipitates, it is possible to obtain the strain distribution within the precipitates when the elastic constants and/or the sizes of the precipitates are different each other. The strains are expanded about arbitrary points, giving more accurate distributions of the strains than those presented elsewhere. The present method can be directly estended to the case of more than two spherical precipitates. 본 연구에서는 비등방성 기재 안에 있는 두개의 비등방성 구형석출물에 대한 보다 일반적인 해법이 다루어진다. Green함수와 석출물의 특성함수(characteristic function)을 이용하여 변형도에 대한 적분방정식이 유도되었으며, Taylor급수를 이용 한 근사해가 얻어졌다.이 방법은 어떠한 대칭성도 필요로 하지 않으므로 석출물의 크기나 재질 등이 서로 다른 경우에 적용될 수 있으며 급수전개하는 점을 옮김으로써 기존의 연구에서보다 더욱 정확한 해를 얻을 수 있다. 또한 특성함수의 중첩이 가능 함을 이용하면 이 방법은 세개 또는 그 이상의 석출물을 갖는 계(system)에도 적용될 수 있다.
최병익 公州大學校 産業開發硏究所 1994 産業開發硏究 Vol.2 No.-
This study was carried out in order to provide a scientific model for agricultural development according to the suggested zoning of Asan County. Data was collected through references issued by Ministry of Agriculture, Forestry and Fisheries, Chung Chong-Namdo, Asankun, etc and as well as discussions with officials of municipalities, county of Asan and farm leaders. The core results obtained were as follows: 1) West Paddy Fields : To specialize rice farming and establish mechanized rice centers. 2) West Horticulture/Dairy Farming Area and North-East Fruits/Dairy Farming Area : To enhance productivity through technology innovation and strengthen bargaining power of producers. 3) Mid-East Urban Farming Area : To foster organic or sustainable agriculture to provide pollution free vegetables. 4) South Hilly Area : To set up green tourism with production of healthy food. However, the followings were recommended for further study : 1) More detailed planning in terms of financial aspect should be followed. 2) Onyang-shi should be included in the planning from 1995 onwards.