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The change in colors of the bottom of an umbrella
bucket can due to the draining rain. The color of
the bucket is dependent upon the amount of rain
This change in color could fulfill customers'
curiousity. Therefore, the chance that customers
scatter their umbrellas reduces.
Tatung University
Taipei, Taiwan
Tatung University
Taipei, Taiwan
Kai-Ting Yu,
Chun-Wei Huang,
Shu-Ting Chan