Methods and systems are provided for obtaining information via a plurality of platforms communicatively linked together via a communication network. The wave-guiding structure comprises a fiber-reinforced composite material and a conductive nonwoven fabric shaped together with the composite material. The snug fit of the holder to the irregularities in the bulb resist the twisting of the bulb. However, if one of the stream of packets is determined to be disallowed as a result of the analyzing, then the network access device discards the disallowed packet and terminates the connection, causing the protected host to discard those packets received on the terminated connection. The liquid rises to a level so that the workpieces are immersed in the liquid.