The paper, by H. Yasuda at University of Washington, Seattle, WA, and colleagues was titled, 'Origami-based impact mitigation via rarefaction solitary wave creation.' ...

Rarefactions are regions of low pressure due ... Amplitude - the maximum displacement of a point of a wave from its rest position. Wavelength λ – distance from one point on a wave to the ...

rarefactions are regions of low pressure due ... However, none of the particles are transported along a longitudinal wave. Instead, they move backwards and forwards as the wave is transmitted ...