A device for patterning structures on a substrate includes an imaging device having a scanning tip, a light emitting device, and a space around the scanning tip. In a particular embodiment, the method includes determining a distance of an edge of the macro cell from a power line or a ground line of the system power supply network. The server maintains the two RUIs synchronized such that the RUI on the companion mirrors the RUI on the TV. The conveyor assembly includes a conveyor shaft assembly that allows for easy removal and installation of conveyor shafts and accompanying parts. When the infant carrier is attached to the upper stroller frame, an infant can be safely transported on the same stroller with a second child.