This work was done by Yoseph Bar-Cohen, Xiaoqi Bao, and Neville Marzwell of Caltech for NASA's Jet Propulsion Laboratory. For further information, access the Technical Support Package (TSP) free on-line at www.nasatech.com/tsp under the Machinery & Automation category.
In accordance with Public Law 96-517, the contractor has elected to retain title to this invention. Inquiries concerning rights for its commercial use should be addressed to
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Refer to NPO-21063, volume and number of this NASA Tech Briefs issue, and the page number.