One embodiment of the present invention provides a system that protects a server against denial-of-service attacks. The backplane is particularly well-suited to power distribution and control applications, such as in industrial motor drives, and so forth. The vibration damper can be made of stainless steel mesh but not impregnated. The blends of EVCl and VAE-NMA polymers do not require an acid catalyst to facilitate cure. These defects are visible by producing a photoluminescence image of the semiconductor. The flange has an inner rim delimiting the aperture therein, and a central area encircling the aperture, which area has a predetermined weakening line pattern.