Imagery rehearsal therapy is a brief, well-tolerated treatment that appears to decrease chronic nightmares, improve sleep quality, and decrease PTSD symptom severity.

As sanctioning bodies impose more restrictions on the number of days race teams are allowed to test, the successful use of component models and simulation becomes the division between a winning team, and all the rest. One of the main components race teams use to adjust the handling characteristics of their racecar is the damper. Damper adjustments allow the team to control body attitude, maximize the grip of the tires and fine-tune the car for driver feel. During track testing, teams make multiple damper adjustments based on the dampers they have characterized on their dynamometers back at the shop. To help expedite this process, a damper model is developed so a large range of adjustments can be quickly characterized without having to rebuild the damper and then run each adjustment on the dynamometer. This paper considers modeling of a highly-adjustable race damper made by Penske Racing Shocks for the NASCAR Nextel Cup Series. In addition to flow through piston bleed orifices, and valves in the piston, as considered in previous models, this model also considers flows through a head valve. With the completed model, a parametric study is conducted to investigate the effects of varying different damper parameters. The results of this study will show the effects various parameters have on the damper's output force. The final model will not only allow race teams to see the results of a damper adjustment, but will also aid in damper design and give an improved damper model for vehicle simulation.