A method and system for determining the angular position of an object are disclosed. A plurality of radially-arrayed engagement grooves are formed on an inner surface of the top wall. The ball return assembly delivers a lightweight polymeric ball to a batter in the form of a soft-toss. Quantification of changes in ventricular regional wall motion asynchrony in response to a sequence of therapies provides for a means to determine an approximately optimal therapy for an intended patient response. Similarly, if a different LAN-side device desires a PPPoE session, a request packet to establish a different PPPoE session may be received, and another PPPoE discovery stage packet including a different tag may be output.