This paper studies practical means of accurately locating the centres of circular objects. The Hough transform approach is in many ways ideal but is rather computation intensive if full account is taken of radial and transverse errors. Overcoming this problem seems impossible if a fully parallel solution is required: however, a partly sequential scheme is derived which retains the advantages of the parallel approach, being fast, robust and highly accurate.
A major problem facing government and industry is the identification, from among the many other claimants, of those themes of science that can be technologically exploited to yield significant social and economic benefit. This article describes how the Programmes Analysis Unit has faced this problem when advising on strategic decisions. It is hoped that it is also a rebuttal of the charges Free Run 2
of ‘soothsaying’ and ‘thaumaturgy’ (miracle working magic).
Modern aviation gas turbine engines are considered to be highly reliable in that failures in service are rare. In fact this is Roshe Run Men
a misconception, and freedom from service failures is largely the result of stringent standards imposed during frequent inspections. Most failures are thus detected at the incipient stage and appropriate action taken to prevent service failure. The common failure mechanisms found in gas turbine blades are discussed and illustrated.