Examples of S-curve phenomena: the growth of brewer’s yeast (Ref. 1), the spreading of radios and TVs (Ref. 2), and the growth of the readership of scientific publications (Ref. 3).
Line-shaped invasion, followed by consolidation by transversal diffusion. The predicted history of the area covered by diffusion reveals the S-shape curve.
Tree-shaped invasion, showing the narrow regions covered by diffusion in the immediate vicinity of the invasion lines.
(Color online) The evolution of human-made volume-point flow underground: drilling and oil extraction pattern under the Empty Quarter, Saudi Arabia (Courtesy of Aramco). This tree-shaped design is an icon of all mining that occurs worldwide: coal, gas, metals, etc.
The scales of the S-curve phenomenon.
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