An organic-inorganic hybrid material, including a charge transportable organic polymer and a metal oxide. The DFE and its active filter operate in continuous time to give improved performance over a discrete-time DFE. The number of zigs of the zigzag member in each hoop member may be varied, as can the zig length. If the pressure sensor determines that the difference between a first air pressure inside the chassis and a second air pressure outside the chassis is less than a preselected pressure, the air mover can increase the flow of air through the chassis and past the computer module. Each of the nanoclusters has a conductor and covers a group of light emitting nanorods, among the multiple light emitting nanorods, with the conductor. Interdigitated sheet guides are provided for defining the sheet path in the bidirectional modules.