The present invention aids golfers in developing a better golf swing in a quick, easy and effective manner, comprising a \u201cC\u201d-shaped head rest that is positioned across the user’s forehead and padded for comfort. The LED driver controllers may control one or more LED drivers in multiple different ways, including controlling on times, off times, delays, current levels, and other parameters. The method continues with the computing device segmenting the data partition into a plurality of data segments. The communication may be conducted with an external programmer-type device, or with another implanted device, for example, located remote from the heart. The invention advantageously uses a decentralized scheduling hierarchy to regulate the distribution of bandwidth and buffering resources at multiple contention points in the switch, in accordance with the specified QoS requirements of the configured traffic flows. A method of preparing an apparatus for explosion welding is also provided, as is a method for forming an explosion welded article having a non-planar shape.