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Displaying 48026 - 48050 of 73779

Intercomparison of Visual Diffuse Transmission Density Measurements

April 1, 2000
Author(s)
Egbert Buhr, Detleff Bergmann, E A. Early, Thomas R. O'Brian
An intercomparison of visual diffuse transmission density measurements of photographic and x-ray film step tablets was completed bytwo national metrology institutes, the National Institute of Standards and Technology, USA, and the Physikalisch-Technische

Laboratory Primary Standards

April 1, 2000
Author(s)
John D. Wright
Commonly used primary calibration techniques for the measurement of liquid and gas flows are described. The techniques described include: static gravimetric and dynamic gravimetric methods for both gases and liquids, liquid piston displacement provers

MALDI-TOF MS Analysis of a Library of Polymerizable Cyclodextrin Derivatives

April 1, 2000
Author(s)
Rafael L. Bowen, M Farahani, Sabine H. Dickens, Charles M. Guttman
Polymerizable cyclodextrin derivatives (PCDs) have been proposed as candidates for use in dental therapeutics (Bowen, 1996 and Bowen and Reed, 1997). Here PCD libraries were synthosized by quasi-random reactions of 6 moles of methacrylic anhydride plus 7

NIST-BMDO Transfer Radiometer (BXR)

April 1, 2000
Author(s)
Timothy M. Jung, Adriaan C. Carter, Steven R. Lorentz, Raju V. Datla
An infrared transfer radiometer has been recently developed for the Low-Background Infrared Calibration (LBIR) facility at the National Institute of Standards and Technology (NIST) for the Ballistic Missile Defense Organization (BMDO) program. The BMDO

Planck Constant Determination from Power Equivalence

April 1, 2000
Author(s)
David B. Newell
Equating mechanical to electrical power links the kilogram, the meter, and the second to the practical realizations of the ohm and the volt derived from the quantum Hall and the Josephson effects, yielding an SI determination of the Planck constant. The

Polymer Division Technical Activities - 1999

April 1, 2000
Author(s)
Eric J. Amis, B M. Fanconi
Technical activities of the Polymers Division, 854, for the 1999 fiscal year are described. The report is organized by programs: Electronic Packaging, Interconnection and Assembly; Polymer Blends and Processing; Polymer Composites; Polymer Characterization

Precision Measurement of Fundamental Constants Using GAMS4

April 1, 2000
Author(s)
Maynard S. Dewey, Ernest G. Kessler
We discuss the connection of high-energy gamma-ray measurements with precision atomic mass determinations. These rather different technologies, properly combined, are shown to lead to new values for the neutron mass and the molar Planck constant. We then
Displaying 48026 - 48050 of 73779
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