F. Wallace Harrison

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A control architecture is presented for real-time, sensor-based, shared control of remote, multiple-manipulator telerobotic systems. The system allows teleoperation, autonomy, or a combination (shared, telerobotic control). The rate-based system accepts control inputs from a variety of sources (joystick position or velocity, automated path planner position(More)
A new method for the fluorescent staining of stalic acid-containing glycoconjugates in fixed tissues is described. The procedure uses mild periodate oxidation, followed by condensation with dansylhydrazine and reduction of the hydrazones to hydrazines. The specificity of the reaction for sialic acid is tested on model glycoconjugates. The procedure gives(More)
The 2007 National Research Council (NRC) Decadal Survey on Earth Science and Applications from Space recommended Active Sensing of CO(2) Emissions over Nights, Days, and Seasons (ASCENDS) as a midterm, Tier II, NASA space mission. ITT Exelis, formerly ITT Corp., and NASA Langley Research Center have been working together since 2004 to develop and(More)
The cytology of the testaceous ameba, Lesquereusia spiralis (EHRENBERG) PENARD, has been described using a broad spectrum of cytochemical methods. Most cytological characteristics lie within the range of variability reported for free living non-shelled amebas. The shell of L. spiralis is complex, being composed of siliceous platelets positioned in an(More)
Fluorescent cytochemical techniques, chiefly end-group methods, have been employed in the characterization of cells in calid and algid normal and LUCKE tumor-bearing kidneys of the leopard frog, Rana pipiens. Cytoplasmic RNA and glycogen distribution reflect the known patterns of general metabolic activity of the respective cells in question. Protein(More)
Histochemical preparations stained by a variant of the Morel-Sisley reaction for protein tyrosine were found to produce a red fluorescence when excited by broadband blue light which is topologically identical to the distribution of chromophore when viewed by absorption (equal transmission) microscopy. The fluorescence mode of viewing preparations stained by(More)
The hydroxy-naphthoic acid hydrazide (HNAH) procedure can be employed not only for selective fluorochroming of side chain carboxyl groups of proteins, but also for demonstration of certain exoplasmic structures---particularly basement membranes. The demonstration of basement membranes by the HNAH procedure is likely related to the relatively high levels of(More)
A multi-pixel laser altimeter using pseudo-random-noise-modulated fiber lasers has been developed for Climate Change research and Exploration. The architecture supports a wide set of operational parameters (range resolution, range ambiguity interval, temporal update rate) without modifications to the hardware. These parameters can be changed dynamically,(More)
Freshwater sponges, Corvomeyenia carolinensis Harrison, were placed into tap water to induce degenerative reduction body formation. Reduction bodies were examined using light and electron microscopy in order to define their histochemical and ultrastructural characteristics. The reduction body of freshwater sponges is an extremely simple developmental system(More)