Author:Thirlwall, JTDate:Nov 1998The recognition of small features of low contrast in the image recorded by an x-ray image intensifier is usually limited by photon noise. This detail-contrast perceptibility is dependent on the detective quantum efficiency (DQE) and the ...Read more
Author:Steyn, WJvdM; Du Plessis, L; Denneman, EDate:Jan 2006The GDPTW makes extensive use of instrumentation in their Accelerated Pavement Testing (APT) and Long Term Pavement Performance (LTPP) programmes. In order to remain at the forefront of technology, this project investigates the available ...Read more