A walker is disclosed having two sets of handles positioned for rising from and lowering to a seated position in addition to serving as a walking aid. The EPMS generally comprises EPSS equipment, a management computer system for managing, monitoring, and testing the operational characteristics of the EPSS equipment, and a plurality of interface modules for providing unified communication capabilities between the management computer system and the EPSS equipment. A connection to each platelet provides for applying a voltage, wherein the platelet separation changes according to the applied voltage. Hinge member includes a first hinge end and a connecting end to connect to a first structural member of an infant support apparatus along a first axis. The first and second delay units receive the same input signal.