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In this paper, we modify the conventional 5-layer membrane electrode assembly (MEA, in which a proton exchange membrane (PEM) is located at its center, two Pt-C-40 (Pt on carbon powder support, Pt content 40 wt.%) catalyst layers (CLs) are located on the surfaces of the both sides of the PEM and two gas diffusion layers (GDLs) are attached next on the outer(More)
In this study, we develop a secure high-performance WSN, named the Secure and High-performance WSN based on Symmetric-key Matrix (SHWSM for short), which exploits a symmetric key as a channel key to improve the key-exchange performance of a network when a node is newly added to the network. We also use time key, random key, system group key, individual(More)
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