A method and apparatus for securing a wheeled device such as a shopping cart is disclosed. The pair of chains, which are guided on a vertical section and on a horizontal section, are guided over an upper deflecting arrangement and a lower deflecting arrangement. A method of producing piezoelectric fibers includes electrospinning a polymer solution to form a fiber and winding the fiber onto a rotating target in which the rotating target is electrically grounded. The task of creating a SOAP-based web service is thus greatly simplified by reducing the number and complexity of considerations required of the developer when generating SOAP-based Web services. This permits the etching process to be controlled for more uniform and precise wafer etching as lowering the brim tends to shadow the edge region of the wafer from the plasma, reducing etching in the edge region while not significantly affecting etching in the central regions of the wafer.