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Reaction Diffusion Pattern

In Kouhei Nakama’s production, Diffusion, programming is used to generate patterns on a human form. The central question of the piece is “Why do humans not have patterned skin like animals?”. To explore this concept, Nakama implements reaction-diffusion algorithms to generate patterns that resemble those found in plants and animals.

Kate McLean began reading more about reaction-diffusion, particularly as it pertains to animal patterning. First, she read “Reaction-Diffusion Model as a Framework for Understanding Biological Pattern Formation,” by Shigeri London and Takeshita Miura.

The study investigates reaction-diffusion models as they may pertain to the development of self-regulating pattern formation in vertebrates. The article shows how these patterns, also called Turing patterns, are exhibited in various species and details how they are able to be expressed and dynamically adjusted.

In regards to her research, a section on pigment interactions and resulting pattern formation in Zebrafish lends itself well to improving her understanding of how and why these patterns present themselves in Poison Dart Frogs.

In particular, she learned that these interactions tend to occur between two pigments, which validates her findings around the dyad-based organization of pigments in the frogs. Additionally, the ability of these patterns to be predicted by algorithms means that she can generate a near infinite number patterns for the cycling gear prototypes, making it possible for a cyclist to easily customize their gear to represent their cyclist identity.

Key findings:

  • Reaction-diffusion patterns, also called Turing patterns, occur as an interaction between two types of pigmentation cells; thus, it makes sense that the frogs exhibit various color dyads, even when more than two colors are present, backing up kate’s findings and rule-making from her color analysis of the dart frogs.
  • Article led her to the original article on reaction-diffusion patterning that was published by Turing in 1952, which she can use to better understand the algorithms behind these patterns so she may create a generator of the patterns — related to customizability of the cycling gear.
  • The article also led her to a simple generator of RD patterns that she can play around with by altering the parameters of the algorithms used.

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