A fluid-filled cylindrical elastic mount having an inner sleeve and an outer sleeve, and an elastic body interposed therebetween. The tracking system is learned by using information produced by an initial object model in combination with an initial tracking function to probabilistically determine the configuration of one or more target objects in a temporal sequence of images, and a data acquisition function for gathering observations relating to color in each image. Preferably the backboard and floor board are covered by soft mats. A reflection surface can be formed in the outer peripheral surface of the lens. A universal port user agent performs these call setups.