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This monograph on generalised functions, Fourier integrals and Fourier series is intended for readers who, while accepting that a theory where each point is proved is better than one based on conjecture, nevertheless seek a treatment as elementary and free from complications as possible.

Astronomers have long noted that the Earth does not rotate uniformly about an axis fixed in the planet, that both the length-of-day and the direction of the rotation axis vary periodically and irregularly by small amounts. These variations are an immediate consequence of the Earth not being a rigid body.

Professor Achenbach discusses uses of reciprocity relations for the determination of elastodynamic fields, and presents a novel method to solve for wave fields by reciprocity of the actual field with a so-called virtual solution, shedding new light on the use of reciprocity relations for dynamic fields in elastic bodies.

Acoustics of Fluid-Structure Interactions addresses the theory of the production and absorption of noise and vibration by fluid flow. After providing background material in fluid mechanics, acoustics, and structural vibrations, it proceeds to more advanced topics, suited to a graduate-level course on the theory of acoustics and aerodynamic sound.

This book describes the motions resulting from heating a fluid layer from below and the motions of a fluid layer between two concentric cylinders when the inner cylinder is rotated.