Douglas R. Caldwell

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PURPOSE Extracellular matrices were tested for their ability to support the adhesion and proliferation of human corneal endothelial cells. METHODS Human corneal endothelial cells were plated onto tissue culture dishes coated with purified fibronectin or a matrix elaborated by cultured bovine corneal endothelial cells. The presence of human cells in the(More)
A 12-day series of 1749 profiles of turbulent kinetic energy dissipation above the equatorial undercurrent at 140 degrees west showed that, in the upper 110 meters of the ocean, the dissipation radically decreased during the solar heating period each day. Daily averages were linearly related to the local wind power. When integrated over the depth range of(More)
Visibility analysis has traditionally been restricted to point-to-point line-of-sight profiling or point-to-area viewshed analysis. This constrained view of visibility necessarily limits our ability to understand the visibility surface characteristics of the terrain. Recent research by the University of Edinburgh has resulted in the development of a(More)
Few geospatial data representations are more basic than the bounding box; a rectangle surrounding a geographic feature or dataset. Bounding boxes are a key component of geospatial metadata and lie at the heart of many computational geometry algorithms as well as spatial indexing systems. Despite their ubiquity and common use, bounding boxes are more(More)
A fast-response chromel–constantan thermocouple sensor was constructed for use on the microstructure profiler Chameleon and used for 60 ocean profiles off the coast of Oregon. The stability of the thermocouple was compared to that of an FP07 microbead thermistor, and its frequency response was compared to a high-resolution microconductivity probe. Although(More)
A 0.6-centimeter-thick sublayer was found in horizontal flow profiles obtained by traversing a heated thermistor from 19 centimeters above to 2 centimeters below the water-sediment interface in 200-meter-deep water on the Oregon continental shelf. In this sublayer the speed of the current varies linearly with distance above the sediment. Estimates of(More)
Astract: Place names are the most common way we identify geographic features. When place names are unambiguous, they can georeference features, locating them uniquely on the globe. The problem with place names is that they are often not unique; each place may have many names and many different places may have the same name. This paper studies the issue of(More)
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