In order to evaluate and design the cognitive elements of HMI (human-machine interface) the authors propose an original method, semiotic analysis, which aims to reframe the knowledge gained through cognitive science by taking a semiotic approach. They describe three aspects of semiotic analysis: semantic structure analysis, sequential analysis, and expression-function analysis. Secondly, they present reviews of the TRON HMI specifications and home appliances developed by using this application. As a result the authors confirm that the concept of TRON HMI is based on language structure and has a good interface with cognitive science.
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