Otoacoustic emissions, sounds generated by the inner ear, are widely used for diagnosing hearing disorders and studying cochlear mechanics. However, it remains unclear how emissions travel from their generation sites to the cochlear base. The prevailing view is that emissions reach the cochlear base via a backward-traveling wave, a slow-propagating transverse wave, along the cochlear partition....

Throughout its high-latitude excursion Ulysses has observed several types of solar wind structures. In addition to structures such as Alfven waves, compressional features, and microstreams, the solar wind also contains low contrast pressure-balance structures (PBSs). The PBSs are marked by an anti-correlation of the plasma and field pressures; their signatures are often hidden by the comparativ...

A spatially resolved nonlinear dynamical model of the solar wind driven geomagnetic tail plasma is developed for the purpose of space weather predictions. The model represents the fluctuating electromagnetic fields and high pressure central plasma sheet by a large number (2N&200) of semiglobal coupled current loops ranging from the near-Earth geosynchronous orbit position for substorm dynamics ...

In recent years, a theory of wave propagation in marine sediments has been developed, based on the grain-to-grain interactions that occur during the passage of compressional and shear waves. The theory yields a dispersion pair, representing phase speed and attenuation, for each wave. These expressions are functions of frequency and the physical properties of the sediment, that is, the porosity,...

Abstract Consider the scattering of a time-harmonic plane wave by a one-dimensional periodic surface. A novel computational method is proposed for solving the inverse elastic surface scattering problem by using the near-field data. Above the surface, the space is filled with a homogeneous and isotropic elastic medium, while the space below the surface is assumed to be elastically rigid. Given a...

RAYLEIGH waves from the Solomon Islands earthquake of July 29, 1950, recorded at Honolulu, Berkeley, Tucson, and Palisades are analyzed. Both the direct waves and those propagated through the Antipodes were observed for all stations except Honolulu. Application of a correction for land travel results in a dispersion curve for the oceanic portion of the path. It is found that the observed disper...

In shear wave far detection logging, dipole-source radiation is the main factor influencing amplitude of reflected waves. this paper, a method derived with far-field asymptotic solution to calculate waves in fluid-filled borehole. Then simulated under both low and high frequencies. addition, influences formation elastic parameters on are analyzed variations characteristics source frequency bore...

We study the reflection and transmission coefficients of plane waves incident at an interface between two isotropic thermoelastic half spaces compare them with those elastic case. The models include classical-Biot (B) extended Lord-Shulman (LS) theories, predict reflected transmitted fast-compressional (P), thermal (T) shear (S) waves. are formulated in terms incidence inhomogeneity angles, med...