A. Mark Earnshaw

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The European Suspension Test was used to assess the relative resistance of 19 individual Listeria monocytogenes genotypes, isolated from the poultry processing environment, to three commercially used disinfectants employed in the plant at the time of their isolation. To establish the relative resistance between the strains, the concentration of each(More)
Cell capacity in a CDMA communication system can be increased through the use of base station antenna arrays and digital beamforming. We have therefore developed a comprehensive chip-level simulator of the reverse link component of an IS95-compliant cellular system. This level of detail is necessary to validate our simplifying models for imperfect(More)
A linear method for recovering the translation direction of a moving camera using optical ow has been previously developed. This method initially produced a biased estimate and the original authors proposed a dithering technique for eliminating this bias. An alternative explanation of and method for removing the bias are presented here, together with the(More)
This study presents a comparative investigation into differences in the mechanical properties between two hydrogels commonly used in cartilage tissue engineering [agarose vs. poly(ethylene glycol) (PEG)], but which are formed through distinctly different crosslinking mechanisms (physical vs. covalent, respectively). The effects of hydrogel chemistry,(More)
The reverse link encoding steps of the IS95 cellular CDMA standard consist of convolutional encoding, block interleaving, and orthogonal Walsh function encoding. Deinterleaving individual symbol metrics obtained from the Walsh function matched lters followed by conventional Viterbi decoding produces suboptimal results, as unwanted inter-symbol Walsh(More)
A noniterative method using optical ow to recover the translation direction of a moving camera has been previously proposed in [4]. We present a detailed explanation of the bias in this algorithm and compare methods for eliminating this bias, as well as presenting a comprehensive error analysis. This analysis includes a necessary modi cation to the Cram(More)
The estimation of the 3-D displacement of a moving camera relative to a scene is critical for applications in robotics as well as object-based video compression. By estimating the relative motion within a scene, one can accurately predict object positions for the future, thereby reducing the amount of information which must be coded. This problem has an(More)
A linear method using optical ow to recover the translation direction of a moving camera has been previously presented. This algorithm produced a biased estimate and various compensation techniques have been proposed. The results of an error analysis of the diierent approaches containing expressions for the expected mean vectors and covariance matrices of(More)