Study of Leaf Quality Coefficient on Korea Flue-cured Tobacco Leaves According to Chemical Variables. (이화학적인 방법에 의한 황색종 잎담배 품질의 계수)
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- Journal of the Korean Society of Tobacco Science
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- v.6 no.1
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- pp.63-72
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- 1984
1 . Some components associated with mildness, taste, and aroma were set. It was supposed that the three factors contribute to equally the evaluation of tobacco quality. Following equation of quality index was provide.
B₂O₃침가에 따른 (Zn/sub 0.8.Mg/sub 0.2/)TiO₃계 세라믹스의 마이크로파 유전특성에 대하여 연구하였다. B₂O₃의 침가량에 비례하여 B₂O₃와 (Zn/sub 0.8.Mg/sub 0.2/)TiO₃와외 반응에 의한 TiO₂ 석출물의 양이 증가하며 공진주파수 온도계수가 증가하였다. 소결온도에 따라 액상의 양, 미세조직, TiO₂와 2차상의 석출거동이 상이하게 나타났다. 6.19mo1.% B₂O₃물 첨가한 시편을 900℃에서 5시간 소결시 ε/sub r/ = 23.5, Q×f/sub o/ = 67,500 ㎓, T/sub f/ = -1.42 ppm/℃의 우수한 마이크로파 유전특성을 얻을 수 있었다.
The microwave dielectric properties of
Introduction: Diffusion is process by which an innovation is communicated through certain channel overtime among the members of a social system(Rogers 1983). Bass(1969) suggested the Bass model describing diffusion process. The Bass model assumes potential adopters of innovation are influenced by mass-media and word-of-mouth from communication with previous adopters. Various expansions of the Bass model have been conducted. Some of them proposed a third factor affecting diffusion. Others proposed multinational diffusion model and it stressed interactive effect on diffusion among several countries. We add a spatial factor in the Bass model as a third communication factor. Because of situation where we can not control the interaction between markets, we need to consider that diffusion within certain market can be influenced by diffusion in contiguous market. The process that certain type of retail extends is a result that particular market can be described by the retail life cycle. Diffusion of retail has pattern following three phases of spatial diffusion: adoption of innovation happens in near the diffusion center first, spreads to the vicinity of the diffusing center and then adoption of innovation is completed in peripheral areas in saturation stage. So we expect spatial effect to be important to describe diffusion of domestic discount store. We define a spatial diffusion model using multinational diffusion model and apply it to the diffusion of discount store. Modeling: In this paper, we define a spatial diffusion model and apply it to the diffusion of discount store. To define a spatial diffusion model, we expand learning model(Kumar and Krishnan 2002) and separate diffusion process in diffusion center(market A) from diffusion process in the vicinity of the diffusing center(market B). The proposed spatial diffusion model is shown in equation (1a) and (1b). Equation (1a) is the diffusion process in diffusion center and equation (1b) is one in the vicinity of the diffusing center.