Shimizu Corporation, Tokyo, Japan. Helpful comments and review were 

 provided by Professor Robert L. Wiegel and William C. Webster, 

 University of California, Berkeley, Califomia. 



At the time of publication of this report. Director of WES was 

 Dr. Robert W. Whalin. The Commander was COL Robin R. Cababa, EN. 



The contents of this report are not to be used for advertising, publication, or 

 promotional purposes. Citation of trade names does not constitute an official 

 endorsement or approval ofAe use of such commercial products. 



VI 



