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An acoustic microscopy method to measure stress is based on the changes in the polarizations and phases of acoustic waves in an isotropic elastic medium produced by stress induced anisotropies. The interference between waves due to a change in their phase exhibits the stress patterns. The use of acoustic waves of different wavelengths allows the imaging of stress in objects of variable sizes from microelectric devices to welds in pressure vessels.

Computer models have been developed of emergency diesel generators and their associated emergency core cooling system induction motors during sequencing and results compared with field tests. Models required to perform studies of emergency diesel generators in a nuclear plant are presented. Field measurements indicating different response of two seemingly identical generator excitation systems are discussed. Results of 480 volt ac contactor dropout testing are provided for determining voltage limits in the 480 volt system during motor starting transients.

In this paper we analyze hypersingular integral equations of the Peierls type specified on the whole real axis. The method of "approximate approximations" [Maz'ya, Proceedings of the Eighth Conference on the Mathematics of Finite Elements and Applications, VIII, MAFELAP 1993, Brunel University, 1994, pp. 107-104] is employed in order to produce numerical solutions of high accuracy, and the results are applied to problems in the theory of dislocations. The critical Peierls stress is evaluated for different configurations of dislocations and for different types of the interatomic force law. [ABSTRACT FROM AUTHOR]