Lognormality in Crystal Size Distribution in Dynamic Recrystallization Ichiko Shimizu Forma, Vol. 13 (No. 1), pp. 1-11, 1998 [Abstract] How to Solve the Game "LIGHTS-OUT"—An Application of Homomorphism in Group Theory— Takaomi Ishihara Forma, Vol. 13 (No. 1), pp. 13-21, 1998 [Abstract] On Tentative Interpretation of Fragmentation by Percolation Hiroaki Katsuragi, Shonosuke Ohta and Haruo Honjo Forma, Vol. 13 (No. 1), pp. 23-29, 1998 [Abstract] Vibrational Modes of a Spherical Drop and Spherical Harmonic Functions Yoji Arai, Makito Kashiwabara and Ryuji Takaki Forma, Vol. 13 (No. 1), pp. 31-45, 1998 [Abstract]