Third-order susceptibilities are calculated for a Doppler-broadened two-level system. The dependence of fourwave mixing on the angle 0 between the pump and signal fields is studied, and the reflection coefficient is shown to have a narrow field of view that is inversely proportional to the ratio of the Doppler width to the homogeneous linewidth. For the collinear geometry, 0 = 0°, the frequency...

In this paper, interpolation of linear predictive coding (LPC) parameters in terms of the following representations is investigated: linear prediction coefficient representation, reflection coefficient representation, log-arearatio representation, arc-sine reflection coefficient representation, cepstral coefficient representation, line spectral frequency representation, autocorrelation coeffici...

We study the duality between the two dimensional black hole and the sine-Liouville conformal field theories via exact operator quantization of a classical scattering problem. The ideas are first illustrated in Liouville theory, which is dual to itself under the interchange of the Liouville parameter b by 1/b. In both cases, a classical scattering problem does not determine uniquely the quantum ...

The CWKB approach to non-reflecting potential and cosmological implications. Abstract We discuss the method of calculating the reflection coefficient using complex trajectory WKB (CWKB) approximation. This enables us to give an interpretation of non-reflecting nature of the potential under certain conditions and clarify some points, reported incorrectly elsewhere [1] for the potential U (x) = −...

Planar antenna reflectors are the modern design trend of both multibeam and frequency-scanning arrays. The planar implementation is typically performed using substrate-integrated waveguide (SIW) technology. A reflector’s profile can be different from canonical one (parabolic, elliptic, hyperbolic, etc.) because effect spatial dispersion reflection coefficient SIW-based surface. It should synthe...

A large central compliance is thought to dominate the hemodynamics of all vertebrates except birds and mammals. Yet large crocodilians may adumbrate the avian and mammalian condition and set the stage for significant wave transmission (reflection) effects, with potentially detrimental impacts on cardiac performance. To investigate whether crocodilians exhibit wave reflection effects, pressures ...