| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIGS. 1A through 1C are views illustrating multi-layer materials with graded resistance changes according to exemplary embodiments of the present invention; FIG. 2 is
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