Diamond. Part 1

In this, the first of two articles on diamond, a review is given of its hardness, its sources, its fabrication and of many of its uses as a technological material. Some examples of etched diamond surfaces, growth features, surface polish and percussion marks are illustrated. The history of man-made diamonds is briefly reviewed.

In part 2, which will follow later, aspects to be treated will include absorption spectra, semi-conductivity, diamond counters and irradiation defects.     

Overcoming Nonrenormalizability. Part 2

Journal of Statistical Physics - The procedures to overcome nonrenormalizability of ? 4 n , n≥5, quantum field theory models that were presented in a recent paper are extended to address...     

Laser dye stability. Part 2

The Zernike polynomials are orthogonal functions defined on the unit circle, which have been used primarily in the diffraction theory of optical aberrations. A summary of their principal properties is given. It is shown that the polynomials, which are closely related to the general spherical harmonics, are especially useful in numerical calculations. In particular, by using the polynomials as a basis to represent the commonly encountered functions of optical theory, it is often possible to avoid numerical quadrature and computations are reduced to the simple manipulation of expansion coefficients.