Faculty of Engineering, Okayama University Acta Medica Okayama 0475-0071 29 1 1994 Note on the Electronic Structure of C(60) Molecule 15 22 EN Chieko Totsuji Takeo Matsubara Masumi Obuchi /10.18926/20012 A molecular orbital approach to the electronic structure of C(60) molecule is formulated on the basis of optimized bond orbital model and the stability of the truncated icosahedron structure is examined. No potential conflict of interest relevant to this article was reported.

Faculty of Engineering, Okayama University Acta Medica Okayama 0475-0071 29 1 1994 Electronic States in Semiconductor Quantum Dot with Fluctuating Interfaces 7 14 EN Hiroo Totsuji Shigetoshi Nara Chieko Totsuji /10.18926/20011 Effects of interface fluctuations on the electronic states in semiconductor quantum dots are analyzed on the basis of numerical solutions for ground state wave functions and energy eigenvalues. It is shown that the effective volume of confinement becomes smaller than the real volume of quantum dots due to fluctuation. This effect comes from the fact that the wave functions with larger characteristic wavelength are not able to deform themselves following the fluctuation of interfaces exactly. No potential conflict of interest relevant to this article was reported.

Faculty of Engineering, Okayama University Acta Medica Okayama 0475-0071 29 1 1994 Study on Water Quality of Surface Runoff and Groundwater Runoff on the Basis of Separation by a Numerical Filter 23 34 EN Osami Kawara 10.18926/19585 In this study we investigated the water quality of surface runoff and groundwater runoff from the basins of the Yodo River and the Asahi River based on that separated by a numerical filter. The water quality of the surface runoff is greatly different from the groundwater runoff. The tendency of concentration change in accordance with river discharges is different from each other. The water qtiality of groundwater runoff changes with river discharges clockwise in many cases. The differences of COD and SS originating from those of population and industrial activities in each basin are found in the lower SS concentrations of the surface runoff and the COD cencentrations of the groundwater runoff. The nutrients and chlorine ion were investigated, too. No potential conflict of interest relevant to this article was reported.

Faculty of Engineering, Okayama University Acta Medica Okayama 0475-0071 29 1 1994 Scribing of Ceramie Circuit Board with Q-Switched Nd�FYAG Laser 1 6 EN Yoshiyuki Uno Shin-ichiro Kubota Seiichi Yokomizo Kojiro Ogata Nobuhiko Tada 10.18926/19584 Scribing of copper coated alumina ceramic board with Q-switched YAG laser used for the maskless direct patterning of circuit�@board is experimentally investigated, which leads to efficient production of trial circuit board. Better dividing of alumina circuit board 655ƒÊm in thickness can be attained by the scribing of about 100ƒÊm depth. Higher repetition frequency of laser irradiation leads to smaller notch angle and lower breaking load. No potential conflict of interest relevant to this article was reported.