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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
(A) Force sensor (FlexiForce sensor A-201, Tekscan, Boston, MA, USA) used in this study. (B) A development board showing measured force. (C) Activated state by applying MAD.