A transverse harmonic seismic wave, which propagates through the upper fractured layer of the Earth towards the Earth's surface, is considered. It is shown that the attenuation of a seismic wave in the Earth's upper crust is due to internal friction, i.e., friction between the sides of ...
This has made TFPMM desirable for direct drive applications where a high torque is required at a low rotational speed, such as traction applications, free piston energy converter applications, wind turbines, and wave energy converters [4,6,7]. TFPMMs are also recognized as modulated pole ...