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Best Rated Robot Vacuum Cleaner While robot vacuums are excellent in keeping your floors spotless, they can't substitute for a larger vacuum. Even the most advanced robots have trouble getting deep into carpets and rugs, and they can get tangled with cords and socks. Your robot will last longer if it is maintained with regular maintenance. This includes replacing filters, removing the tangled hairs from brushes, and emptying the dust bin. Battery Life Most robot vacuums

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To investigate the effects of temperature and hydration on the microstructure of polymer electrolyte membrane and the transport of water molecules and hydronium ions, molecular dynamics simulations are performed on Nafion 117 for a series of water contents at different temperatures. The interactions among the sulfonate groups, hydronium ions, and water molecules are studied according to the analysis of radial distribution functions and coordination numbers. The sizes and connectivity of water clusters are also discussed, and it is found tha