The health state of a subject is automatically evaluated or predicted using at least one implantable device. In a riding quality simulation system of the invention, a control unit activates each of actuators, thereby making a simulated passenger room roll. The Faraday shield is disposed inside of the chamber and defined between the electrostatic chuck and the dielectric window. The lengthened time domain signal results in an increase of the frequency or an improvement of the resolving power and the sensitivity of the mass-to-charge domain signal. The dispersing polymer may be formed from the reaction of a compound having one or more carbodiimide groups with acid functional resins such as acid functional polyesters, acid functional acrylics, acid functional polyethers, and fatty acids.