The prototype of removable visual impact indicator for thermoset polymer composite materials is developed, and its characteristics are experimentally determined.The indicator is a fabric Collections tape glued by epoxy to the surface of the polymer composite.The tape is impregnated with a composition that provides a visual response at the place of

In this paper, we present a new type of symmetric encryption by converting the classical monoalphabetic affine cipher into a polyalphabetic cipher.The proposed encryption utilizes the properties of outer-convex Bib dominating set in the corona of graphs to generate random keys from the shared keyword to every character of the message.The new encryp

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