J. W. McLean

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The effects of ocean waves on lidar imaging of submerged objects are investigated. Two significant consequences of wave focusing or defocusing are quantified: (a) intensification of near-surface backscatter in which the mean return is increased relative to that for a flat interface, and (b) spatial-temporal modulations of the backscattered return. For the(More)
A new instrument to measure the point spread function (PSF) in the ocean has provided the opportunity for direct comparison between theoretical predictions and experimental measurement. Theoretical predictions are derived from small angle scattering theory using a simple algebraic fit to the single scattering phase function. The resulting predictions for(More)
Profiling gene expression in endothelial cells provides a strategy for developing a molecular understanding of normal vascular physiology and disease processes involving angiogenesis and vascular remodeling. However, the purification of endothelial cells for this purpose has been challenging because of the difficulty of isolating the cells and their low(More)
Profiling gene expression in endothelial cells advances the understanding of normal vascular physiology and disease processes involving angiogenesis. However, endothelial cell purification has been challenging because of the difficulty of isolating cells and their low abundance. Here we examine gene expression in endothelial cells freshly isolated from lung(More)
In this paper we nd a characterization for when a multivariable trigonometric polynomial can be written as a sum of squares. In addition, the truncated moment problem is addressed. A numerical algorithm for nding a sum of squares representation is presented as well. In the one-variable case, the algorithm nds a spectral factorization. The latter may also be(More)