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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 (http://creativecommons.org/licenses/by/4.0/).
Initial resistance for the sensor systems. The values were used in this attempt to calculate the relative resistance. The systems include the sensor fiber and fiber composites with matrix of PDMS, NR (natural rubber), PVNR (pre-vulcanized natural rubber) and NR with an integrated spring structure.