• Applied Microscopy
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• v.33 no.3
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• pp.169-178
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• 2003

In this review, theoretical approaches of imaging and diffraction in electron microscopy are introduced which allows the diffraction patterns and images to be treated with equal facility and emphasized the relationships between them. The coherent wave optics, incoherent wave imaging theory were introduced. The idea of Abbe theory was also introduced. Varoius phase contrast theories in small angle approximation were derived including the wave theory on Multi-component system.

• Proceedings of the Polymer Society of Korea Conference
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• 2006.10a
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• pp.230-230
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• 2006

Density functional theory (DFT) calculations using the B3LYP hybrid functional and the 6-311++G(d,p) basis set have been performed to predict the wavelength dispersion of optical absorbance and refractive indices for organic compounds and polymers in the range between the vacuum UV (${\sim}157\;nm$) and near-IR (${\sim}850\;nm$). The DFT calculations can reproduce the experimental dispersions of absorbance and refractive indices with high accuracy and low costs. The calculated dispersions demonstrate that the judicious introductions of $-F\;and\;-CF_{3}$ into alicyclic and heterocyclic compounds are effective in reducing the absorption at shorter wavelengths. In addition, the calculated Abbe numbers that represent the refractive index dispersion in the visble region are linearly proportional to the calculated refractive indices at 589 nm.

• Journal of the Korean Home Economics Association
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• v.40 no.1
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• pp.195-208
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• 2002

This study examines how marital dissatisfaction is connected with extramarital relations among married women. To explore this subject,1 am using in-depth interview techniques. The data from 16 married women who involved (and are involving) extramarital relations are collected in semistructured interviews. In this article, I describe four specific types of extramarital relations with particular relevance to marital dissatisfaction: (1) temporary extramarital relations caused by marital dissatisfaction, (2) positive extramarital relations as maintaining dissatisfied marriage, (3) unavoidable extramarital relations as breaking dissatisfied marriage, and (4) extramarital relations as a part of life with satisfied marriage. With these results, I believe that equity theory could be applicable in explaining the relationships between marital satisfaction and extramarital relations. There are limitations when the qualitative research is analyzed. One problem is measurement. It is difficult to measure equality (or equity), life dissatisfaction, and other concepts. furthermore, this study is not abbe to explain causal relationships among equality, life dissatisfaction, actual extramarital relations. The future study should perhaps be in quantitative research focused on the causal model in which all exchange variables are conceptualized and properly measured for the intimate relationship.