The present invention provides a method of manufacturing a composition for polishing silica and silicon nitride on a semiconductor substrate. The hub is mechanically coupled to the fuselage and to multiple blades and is rotated by an engine. The method further comprises forming an image of an avatar representing the person, outputting to a display an image of a user interface comprising an interactive user interface control, and outputting to the display device the image of the avatar such that the avatar faces the user interface control. In one embodiment, the levitation affecting element may comprise one or more magnets similar to that of the levitation base. A plurality of SPs is configured to load the user data over the indoor backbone network or extract user-desired data from the indoor backbone network to provide user-desired services to a user. With such an arrangement, a construction operator is allowed, in installing the present invention, to follow instructions for connection with polarity correctness and to identify if the polarities are set correct according to lighting of the grounding bulb, the transmission bulb and the conduction bulb and touching of the conduction touch-plate.