Dopant Spatial Distributions: Sample Independent Response Function And Maximum Entropy Reconstruction

We demonstrate the use of maximum entropy based deconvolution to reconstruct boron spatial distribution from the secondary ion mass spectrometry (SIMS) depth profiles on a system of variously spaced boron $\delta$-layers grown in silicon. Sample independent response functions are obtained using a new method which reduces the danger of incorporating real sample behaviour in the response. Although the original profiles of different primary ion energies appear quite differently, the reconstructed distributions agree well with each other. The depth resolution in the reconstructed data is increased significantly and segregation of boron at the near surface side of the $\delta$-layers is clearly shown.Comment: 5 two-columne pages, 3 postscript figures, to appear in Phys. Rev. B1

What ‘incomparable Jewells Havens, and sure harbours are’: the remains of late 16th century Dover harbour and their wider significance

SUMMARY: During excavations undertaken for the Dover Western Dock Revival Scheme, Kent, UK, Archaeology South-East (ASE; UCL Institute of Archaeology) encountered substantial remains associated with the development of the port of Dover. Despite natural limitations, especially in the form of silting from the River Dour and longshore drift, Dover has historically been a strategic location in which to maintain a port. The remains presented here comprise a nationally significant waterfront revealed during the revival scheme; that is, the Tudor engineering commonly attributed to Sir Thomas Digges, overseen by the Privy Council and commissioned by Elizabeth I