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During the past decade there has been a renewed interest in active sonar systems at both low and medium frequencies. More recently this interest has been extended to very high frequencies in shallow water. Reverberation often limits the detection performance of these systems, and there is a need to understand the underlying mechanisms that cause the scattering. With more emphasis being given to reverberation phenomena in the Scientific Program of Work at the SACLANT Undersea Research Centre, it was considered an opportune time to host a meeting, bringing together scientists from NATO...

This volume comprises over 50 contributions resulting from the Ocean Reverberation Symposium, held 25-29 May 1992 in La Spezia, Italy. The contributions are presented in eight sections: Scattering Mechanisms, High Frequency Measurements and Mechanisms, Reverberation Modelling, ARSRP Mid-Atlantic Ridge Experiment, Low Frequency Measurements, Volume Scattering, Signal Processing Issues and Applications.

Tales of the Tepee grew out of Edward Everett Dale's close association with Indian tribes living in Oklahoma. During territorial days young Dale rode, hunted, and visited with the Kiowas, Comanches, and Wichitas. Later he taught many Cherokees, Choctaws, Creeks, Chickasaws, Sac and Fox, and Delawares at the state university. Near the beginning of his long and distinguished career as a historian, he gathered and recorded these stories. Originally published in 1920, Tales of the Tepee takes the reader to the lodge bonfires of the Cherokees, Wichitas, and Pawnees, where children stayed awake to...