In thepaper it points out that whenthe planemodel is used to computetheexcavationproblem, theinitialstress of excavation must be modified, andthealgorithmicmodel is shown in the paper.
The agency model for plane tickets is very low-margin and is getting squeezed further by mergers in the airline business (Northwest-Delta, United- Continental, Southwest-AirTran).
But apart from the minor niggles, Mr Knapp said the Mark IA is in fantastic condition and is the best preserved early model of the fighter plane he has ever seen.