Image classification methods and systems are provided. A nozzle chamber structure is arranged on the substrate assembly and includes side walls positioned about the ink inlet passage. The reducing agent is preferably selected from the group consisting of excited species of hydrogen and silicon-containing compounds. For example, the control server may determine a channel based on: a specified bandwidth in a specified time slot, highest available bandwidth in a specified time slot, earliest available time with a specified bandwidth and duration, and all available time slots with a specified bandwidth and duration. An inducing oscillator is generated based on the second oscillator, and a torque responsive to the inducing oscillator acts on the user’s body. The products can be used to make polyurethane and polyester films and foams.