A clock recovery system includes a rough clock generator, which yields a rough clock signal, based upon logic level transitions exhibited by a data signal. Risk is managed by bundling with the commodity at the lower tier a financial instrument designed to indemnify against the risks associated with purchasing the commodity at the lower tier. Phenstatin was found to be a potent inhibitor of tubulin polymerization and the binding of colchicine to tubulin comparable to combretastatin A-4. A retrieved individual print job having an associated print quantity that equals the print run quantity of the aggregate print job is assigned to a single position in the aggregate print job layout. Thus, a measurement object may be exactly extracted. The plurality of light sources is provided around the top end of the lens module, and the image capturer is provided near the other end of the lens module for receiving optical signals through the lens module.