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**publisher and metadata sources**).This work is concerned with the inverse eigenvalue problem for ordinary differential equations such as $y'' + (\lambda - q(x))y = 0$ and with some higher-order generalizations. A classical,… Continue Reading

An efficient algorithm for the solution of compressible magnetohydrodynamic equations in a three-dimensional geometry is presented. Compressional Alfven waves are treated implicitly, thus greatly… Continue Reading

This work is concerned with the inverse eigenvalue problem for the partial differential equation $\nabla ^2 u + (\lambda - q(x,y))u = 0$ . We study the problem of reconstructing the coefficient… Continue Reading

1 April 1987

A short-pulsed intense laser is injected into an underdense plasma to sustain a self-trapped photon channel. With either high-enough intensity or strong-enough focusing the optical beam causes total… Continue Reading

The exposure range of a camera lens is extended by positioning a light filter in front of the lens when the amount of light passing into the lens is greater than a given amount of light for which the… Continue Reading

Abstract A differential method is described for determining the difference of infra-red absorbance of an elongated polymer for radiation polarized parallel and perpendicular to the stretching… Continue Reading

Abstract A cell is described which features a fixed length, double chamber divided into two compartments by a transparent but movable septum. A suitable reference liquid, which might be the pure… Continue Reading

Let $\lambda _n $ denote the nth eigenvalue of the equation $[R(x)y']' + [\lambda P(x) + Q(x)]y = 0$ subject to self-adjoins boundary conditions. Many applications of this equation involve… Continue Reading