The present invention is directed to the production of nanostructures, e. Video processing units processing video data from a plurality of video sources on a frame-by-frame basis, and a backplane having at least a data bus, and a common video bus into which an object from one discrete video stream is merged at any instant in time from a respective video processing unit. The click and drag maneuver not only exits edit mode, but also selects a range of cells. A drive mechanism engages the upper section of the door to move the door between its closed and open positions. Advertisers generate profiles that identify attributes of an intended target market of the advertisement.