Damping Capacity Improvement of Machine Structures by Close Packing with Balls、実習教育にコマの製作とコマの回転運動特性を取り入れた総合的学習について、Estimation of Electron Attachment Cross Section of CCl_2F_2 by Electron Swarm Experiment、Raman Scattering Study of InGaN Grown by Metalorganic Vapor Phase Epitaxy on (0001) Sapphire Substrates