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Detecting Phase Boundaries in Hard-Sphere SuspensionsA special image-data-processing technique has been developed for use in experiments that involve observation, via optical microscopes equipped with electronic cameras, of moving boundaries between the colloidal-solid and colloidal-liquid phases of colloidal suspensions of monodisperse hard spheres. During an experiment, it is necessary to adjust the position of a microscope to keep the phase boundary within view. A boundary typically moves at a speed of the order of microns per hour. Because an experiment can last days or even weeks, it is impractical to require human intervention to keep the phase boundary in view. The present image-data-processing technique yields results within a computation time short enough to enable generation of automated-microscope-positioning commands to track the moving phase boundary
Document ID
20090041783
Acquisition Source
Glenn Research Center
Document Type
Other - NASA Tech Brief
Authors
McDowell, Mark
(NASA Glenn Research Center Cleveland, OH, United States)
Rogers, Richard B.
(NASA Glenn Research Center Cleveland, OH, United States)
Gray, Elizabeth
(Scientific Consulting, Inc. Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
December 1, 2009
Publication Information
Publication: NASA Tech Briefs, December 2009
Subject Category
Instrumentation And Photography
Report/Patent Number
LEW-18157-1
Distribution Limits
Public
Copyright
Public Use Permitted.
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