Featured is a device for NMR or MRI signals from excited nuclei as well as related apparatus, systems and methods. The wristband can include a voltage line. Viewing images and positional and navigation information should not interfere with each other. The gateways operate like base stations that provide the air interface to the mobile communication devices. The semiconductor substrate to which the resist is adhered is cleaned by a hydrogen fluoride aqueous solution. The dampers act to oppose rotation of the grip.