HORIZONS AND PLANE WAVES: A REVIEW

Reflection and Transmission of Plane Waves at Micropolar Piezothermoelastic Solids

The present investigation analysis a problem of r­­­eflection and transmission at an interface of two micropolar orthotropic piezothermoelastic media. The basic equations and constitutive relations for micropolar orthotropic piezothermoelastic media for G-L theory are derived. The expressions for amplitude ratios corresponding to reflected and transmitted waves are derived analytically. The eff...

Plane Waves and Penrose Limits

Plane Waves and Vacuum Interpolation

A 1 2 -BPS family of time dependent plane wave spacetimes which give rise to exactly solvable string backgrounds is presented. In particular a solution which interpolates between Minkowski spacetime and the maximally supersymmetric homogeneous plane wave along a timelike direction is analyzed. We work in d = 4, N = 2 supergravity, but the results can be easily extended to d = 10, 11. The confor...

Plane-polarized helicon waves

By suitably adding rightand left-hand circularly polarized helicon waves in a cylinder, it is possible, in principle, to form linearly polarized modes, contrary to the notion that whistler waves must be circularly polarized. The plane-polarized component is accompanied by a left-hand circularly polarized component which vanishes on axis but becomes important at large radii. The field lines of t...

Caries Prevention – Newer Horizons: A Review

Review Article Caries Prevention – Newer Horizons: A Review Katiyar A, Kohli A, Singh G, Gupta K, Gupta S, Srivastava S Abstract: Prevention is a philosophy of practice based on a perspective that focuses on maintaining health rather than on treating a disease. Modern methodology for the prevention of progressive oral diseases includes the identification of patients at high risk of developing d...