Nearest-neighbor-spacing distributions of people sitting along the west bank of the Kamogawa River flowing through the central part of Kyoto City are derived, based on a dual partitioning process with a fixed ratio. The theoretical asymmetric bell-shaped distribution is compared with previous measurements. This was performed as an advanced study of high school students that does not follow the curriculum guidelines of Japanese high schools.

Sunflower florets spirally fill an inflorescence. Parastichy pairs are a great indicator to understand condition of seeds arrangement. The Parastichy pairs can be calculated as two peak values by the discrete Fourier transform (DFT), from point distributions previously simulated. The most realistic Parastichy pairs obtained by reapplying the two peak values to actual sunflowers can be used to understand and evaluate the sequence of the sunflower seeds.