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In order to investigate the effect of the polyamide benzimidazole group on the surface wettability and interfacial adhesion of fiber/matrix composites, surface features of two kinds of aramid fibers, poly (p-phenylene terephthalamide) fiber (Kevlar-49) and poly-(polyamide benzimidazole-co-p-phenylene terephthalamide) (DAFIII), have been analyzed by X-ray photoelectron spectroscopy (XPS), scanning...
The paper presents the equivalent transmission line equation which is useful to describe the propagation characteristics of electromagnetic waves in a tunnel. For the transmission line theory, the mathematical structure of the classical telegrapher equation was preserved, while the coefficients (the per-unit-length parameters) were generalized in order to represent the essential characteristic of...
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