Let the mean-zero, Gaussian stress process \left\{X(t)\right\} have an autospectral density function of S_{XX}(\omega )=S_{0}U(\omega _{0}-\left|\omega \right| ) .For a specimen with m = 4 , compare the fatigue lives predicted by the Rayleigh approximation, the peak-approximation method, the single-moment method, the formula of Ortiz and Chen, and the formula of Wirsching and Light.