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Displaying 54951 - 54975 of 74337

Optically Isolated Current to Voltage Converter in an Electron Optics System

January 1, 1997
Author(s)
Alan H. Band, John Unguris
A simple, inexpensive, optically isolated current-to-voltage converter circuit has been developed for the measurement of bipolar currents in the range of 10 pA to 1 %A on the biased elements of an electron optics system at voltages up to 3.5 kV. The design

Photogrammetric Reconstruction of Petroglyphs

January 1, 1997
Author(s)
Russell A. Kirsch
Viewing rock art is a complex experience, just as is viewing any ohter art form. This experience may include knowledge of the site location, its time of creation, co-occurence with other rock art, stylistic correspondences (Kirsch 1996), and many other

Physical Modeling of Intumescent Fire Retardant Polymers

January 1, 1997
Author(s)
Kathryn M. Butler
Intumescent chemical systems are designed to swell into a thick, robust foam upon exposure to heat, protecting the underlying material from fire by providing a physical barrier to heat and mass transfer. The mechanisms determining the fire-resistant

Pitch and Step Height Measurements Using NIST

January 1, 1997
Author(s)
R Koning, Ronald G. Dixson, Joseph Fu, V W. Tsai, Theodore V. Vorburger, Edwin R. Williams, X Wang
The use of the atomic force microscope (AFM) for step height and pitch measurements in industrial applications is rapidly increasing. To compare the results obtained by different instruments and to achieve high accuracy, the scales of an AFM must be
Displaying 54951 - 54975 of 74337
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