Significance of core diameter variation in the lateral solidtransfer model for the upper dilute region of circulating fluidized beds M. Horio and H. Lei 107
Particle flow model in a spouted bed T. Tsuji, O. Uemaki, H. Itoh and K. Shinohara 129
A new sizing technique of aerosol particles --- line startsedimentation type using an ultramicroscope Y. Endo, Y. Kousaka and K. Takato 141
Design criteria for particle attrition H. Kalman and D. Goder 153
Translated papers
Measurement of mass flow rate of polymer powder based on staticelectrification of particles H. Masuda, S. Matsusaka and H. Shimomura 169
Homogeneous precipitation of alumina precursorsvia enzymatic decomposition of urea H. Unuma, S. Kato, T. Ota and M. Takahashi 181
News bulletins
Bulletin of the Association of Powder Process Industryand Engineering, Japan (APPIE) 191
Newsletter of the Society of Powder Technology, Japan 193
