Special Issue: Topological Problems in Fluid Dynamics Introduction to Topological Problems in Fluid Dynamics Ryuji Takaki Forma, Vol. 8 (No. 1), pp. 1-4, 1993 Smoke Visualization of a Vortex Ring and a Vortex Pair Hideo Yamada and Takashi Naitoh Forma, Vol. 8 (No. 1), pp. 5-13, 1993 [Abstract] Singularity in Vorticity Field Akio Fukuyu Forma, Vol. 8 (No. 1), pp. 15-25, 1993 [Abstract] Dynamics of Quantized Vortices and Superfluid Turbulence Makoto Tsubota Forma, Vol. 8 (No. 1), pp. 27-44, 1993 [Abstract] Structure of Magnetic Field in a Confined Plasma Zensho Yoshida Forma, Vol. 8 (No. 1), pp. 45-65, 1993 [Abstract] Dynamics of Disclination Points in Liquid Crystals Tomoyuki Nagaya, Hiroshi Orihara and Yoshihiro Ishibashi Forma, Vol. 8 (No. 1), pp. 67-82, 1993 [Abstract] Liquid Crystals and Topological Defects Tetsuji Tokihiro Forma, Vol. 8 (No. 1), pp. 83-97, 1993 [Abstract] Pattern Formation in Rayleigh-Bénard Convection J. Mizushima Forma, Vol. 8 (No. 1), pp. 99-117, 1993 [Abstract] The Fractal Distribution of Bursting Phenomena in Turbulent Boundary Layer Yoshiyuki Tsuji and Ikuo Nakamura Forma, Vol. 8 (No. 1), pp. 119-131, 1993 [Abstract] Structures and Probability Distribution Functions in Homogeneous Turbulences Toshiyuki Gotoh Forma, Vol. 8 (No. 1), pp. 133-145, 1993 [Abstract] Integral Method for Estimation of Connectivity of Elements in 2-Dimensional Gray Patterns Ryuji Takaki and Yoji Arai Forma, Vol. 8 (No. 1), pp. 147-155, 1993 [Abstract]