Discontinuity surfaces and microfacies in a storm-dominated shallow Epeiric Sea, Devonian Cedar Valley Group, Iowa

Hydrogeology of the Devonian-Silurian Carbonate Aquifer, Northern Cedar Rapids, Iowa

Discontinuity Detection in Regression Surfaces

We consider the problem of locating jumps in regression surfaces. A jump detection algorithm is suggested based on local least squares estimation. This method requires O(Nk) computations, where N is the sample size and k is the window width of the neighborhood. This property makes it possible to handle large data sets. The conditions imposed on the jump location curves, the jump surfaces and th...

Notes on the Odonata of the Cedar-Iowa River Basin

Middle Woodland Field Camps in the Cedar Valley

Pulse spreading and correlation loss in shallow water environments with rough sea surfaces and bottoms

Active sonar pulses suffer time-spreading, distortion, and de-correlation due to multipath propagation and reflections from rough boundaries. Correlation of the received distorted pulse with the transmitted pulse leads to degradation in pulse compression gain in comparison to the ideal case of a received pulse being simply a time-shifted, amplitude-scaled replica propagated along a single direc...