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Displaying 48701 - 48725 of 74457

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

Randomness Testing of the Advanced Encryption Standard Finalist Candidates

April 1, 2000
Author(s)
Juan Soto, Lawrence E. Bassham
Mars, RC6, Rijndael, Serpent and Twofish were selected as finalists for the Advanced Encryption Standard (AES). To evaluate the finalists' suitability as random number generators, empirical statistical testing is commonly employed. Although it widely

Relaxation Behavior of Polymer Blends After the Cessation of Shear

April 1, 2000
Author(s)
L Kielhorn, R H. Colby, Charles C. Han
We investigated the relaxation of a binary polybutadiene/polyisoprene blend after the cessation of steady-state shear using both in-situ optical microscopy (OM) and light scattering (LS). Through fast Fourier transforms of the micrographs, we were able to

Retrofit of Pre-Northridge Moment-Resisting Connections

April 1, 2000
Author(s)
S A. Civjan, M D. Engelhardt, John L. Gross
An experimental program was undertaken to evaluate methods to retrofit existing steel moment connections for improved seismic performance. Six full-scale subassemblages were tested under cyclic loading. Typical pre-Northridge connections were retrofit by
Displaying 48701 - 48725 of 74457
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