They should not be considered in the near and intermediate term as a potential one-for- one replacement for current state-of-the-art carbon fiber-reinforced polymer matrix composites. The value of PNM technology is not based solely on mechanical enhancements of the neat resin. Rather, its value comes from providing value-added properties not present in the neat resin, without sacrificing the inherent processibility and mechanical properties of the neat resin. Traditionally, the preparation of a blend or composite with multifunctionality requires a trade-off between desired performance, mechanical properties, cost, and processibility. With the diversity of organic components used in wood, plastic composite processing, there is no single answer to reliably handling these potentially difficult materials.
Ramachandran and . Lakshminarayanan developed convolution-backprojection algorithms which greatly improved the quality and practicality of results obtainable by x-ray tomography. Compared to previously used methods, their algorithms considerably reduced computer processing time for image reconstruction, as well as providing more numerically accurate images. As a result, commercial manufacturers of x-ray tomographic scanners started building systems capable of reconstructing high resolution images that were almost photographically perfect. In 1971, they published their research in PNAS .