The present invention relates to lenses that are capable of post-fabrication power modifications. The rotor is embodied as a welded construction including a first component and a second component. The speculative search result may be displayed on the same web page on the client node as the search query, while the search query is being entered by the user. A network of aligned nanoscale fibers and a composite comprising a network of aligned nanoscale fibers are also provided. The knob cam surface is engaged with the rod for aligning a first end of the rod to the first engagement surface with the knob in the first position and aligning the first end of the rod to the second engagement surface with the knob in the second position. In one embodiment of the present invention, an optical disc drive is comprised of one or more substrates having a width smaller than the diameter of an optical disc and that covers and protects one or more data recording surfaces of the optical disc.