A method of making an optical waveguide preform includes forming a preform including a first portion and a second radial portion, wherein the second portion includes a dopant, and wherein the first portion exhibits a density greater than the second portion. Programs are provided and may also be determined or designed by a treatment administrator or subject. If communications is note established between the client and the server for a selected activation interval and a subsequent grace period, the data is determined to be lost, and programmed security rules are automatically executed. Therefore the aircraft has a preferred orientation, and the control surfaces can be oriented with respect to this preferred orientation. The imaged forbidden pitch patterns are developed in the photoresist. When the transmission mechanism is driven by the driving means, the slider is driven to generate a moving displacement through the engaged first teeth and the second teeth.