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Search Publications

NIST Authors in Bold

Displaying 48026 - 48050 of 73697

Design and Testing of NFRad - A New Noise Measurement System

March 1, 2000
Author(s)
Chriss A. Grosvenor, James P. Randa, Robert L. Billinger
The NIST Noise project has constructed and tested a new, automated, coaxial (GPC-7) radiometer for the measurement of noise sources in the 8-12 GHz frequency band. It is an isolated, total-power radiometer that relies on lookup tables for relevant

Determination of the Molecular Mass Distribution of Narrow Polydispersity Polystyrene by MALDI-TOF-MS: Interlaboratory Comparison

March 1, 2000
Author(s)
Kathleen M. Flynn, S Wetzel, William E. Wallace, William R. Blair, R J. Goldschmidt, David L. VanderHart, B M. Fanconi
NIST has sponsored a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) interlaboratory comparison using a well-characterized polystyrene to determine the reproducibility in determining the molecular mass

Development of Oxygen Scavenger Additives for Future Jet Fuels. A Role for Electron-Transfer-Initiated Oxygenation (ETIO) of 1,2,5-Trimethylpyrrole?

March 1, 2000
Author(s)
B Beaver, V Sharief, Y Teng, R DeMunshi, J P. Guo, E Katondo, D Gallagher, David M. Bunk, J Grodkowski, Pedatsur Neta
Model autoxidative, radiolytic and product studies are presented which explore the potential of 1,2,5-trimethylpyrrole (TMP) as an oxygen scavenger additive for future jet fuels. The results are consistent with a mechanism for the initial stages of the

Distortion-Tolerant Filter for Elastic-Distorted Fingerprint Matching

March 1, 2000
Author(s)
Craig I. Watson, Patrick J. Grother, D P. Casasent
This paper gives results for using distortion tolerant filters to improve performance of fingerprint correlation matching. Three types of distortion tolerant filters were tested: summation, weighted, and MINACE. A set of 55 fingers were used from NIST

Electron-Impact Total Ionization Cross Sections of Molecular Ions

March 1, 2000
Author(s)
Yong Sik Kim, Karl Irikura, M A. Ali
The Binary-Encounter-Bethe (BEB) model for electron-impact total ionization cross sections of neutral molecules has been modified for molecular ions. The total ionization cross section for H + 2, N + 2, CD +, and CO+ from the modified BEB formula are

Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry: Supplement VIII, Halogen Species - IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry

March 1, 2000
Author(s)
R Atkinson, D L. Baulch, R A. Cox, Robert F. Hampson, J A. Kerr, M J. Rossi, J Troe
This paper updates and extends part of the previous data base of critical evaluations of the kinetics and photochemistry of gas-phase chemical reaction of neutral species involved in atmospheric chemistry [J. Phys. Chem. Ref. Data 9, 295 (1980); 11, 327

Excited States at Surfaces: Fano Profiles in STM Spectroscopy of Adsorbates

March 1, 2000
Author(s)
John William Gadzuk, M Plihal
The Fano-Anderson model for a discrete state embedded within a continuum is revisited within the context of excitation and decay processes which lead to some manifestations of Fano lineshape profiles. The phenomenon of resonance tunneling between an STM

Experimental Data for the Viscosity and Thermal Conductivity of Water and Steam

March 1, 2000
Author(s)
Marc J. Assael, E Bekou, D Giakoumakis, Daniel G. Friend, M A. Killeen, J Millat, A Nagashima
As part of a joint project between the International Association for the Properties of Water and Steam and the Subcommittee on Transport Properties of the International Union of Pure and Applied Chemistry Commission 1.2 on Thermodynamics, all available and

Failure Dynamics of the IGBT During Turn-Off for Unclamped Inductive Loading Conditions

March 1, 2000
Author(s)
Chien-Chung Shen, Allen R. Hefner Jr., David W. Berning, J B. Bernstein
The internal failure dynamics of the Insulated Gate Bipolar Transistor (IBGT) for unclamped inductive switching (UIS) conditions are studied using simulations and measurements. The UIS measurements are made using a unique, automated nondestructive Reverse

Folding and Assembly of Rhodopsin from Expressed Fragments

March 1, 2000
Author(s)
K D. Ridge, N G. Abdulaev
The dim-light photoreceptor rhodopsin is a prototypical member of the family of seven-transmembrane helix receptors that are coupled to guanine nucletide-binding proteins (G-proteins). Although chemical aspects of the membrane-embedded chromophore

Guiding Laser-Cooled Atoms in Hollow-Core Fibers

March 1, 2000
Author(s)
D Mueller, Eric A. Cornell, D Z. Anderson, E. Abraham
Laser-cooled atoms from a low-velocity atomic source are guided in a hollow-core optical fiber using the evanescent-wave dipole force from blue-detuned laser light launched into the glass region of the fiber. The transverse velocity of the guided atoms

Heterologous Expression of Bovine Opsin in Pichia Pastoris

March 1, 2000
Author(s)
N G. Abdulaev, K D. Ridge
The overproduction of bovine opsin and structurally related receptors in a variety of heterologous systems has so far proven quite difficult and consequently limited both biophysical and structural investigations. Therefore, a highly efficient expression

Hydrogels Formed by Endlinking PEG to Dendrimer Crosslink Agents

March 1, 2000
Author(s)
B D. Viers, Barry J. Bauer, Y A. Akpalu, F Groehn, Da-Wei Liu, G Kim
Hydrogels were formed by endlinking telechelic vinyl sulfone end-functionalized poly(ethylene glycol) with the terminal amines on dendrimers of different generation. These structures are unique in that the dendrimer crosslink sites were very large, and

Impact of Test-Structure Design and Test Methods for Electromigration Testing

March 1, 2000
Author(s)
S. Menon, J. Fazekas, Jochen von Hagen, Linda M. Head, Colleen E. Hood, Harry A. Schafft
The ultimate goal of this work is to develop design guidelines for electromigration test structures and to revise existing standard test methods for fast wafer-level and conventional package-level stress testing. These tests all involve stressing a sample
Displaying 48026 - 48050 of 73697
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