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NIST Authors in Bold

Displaying 51676 - 51700 of 73697

Reflection Measurement Problems Arising from Haze

August 1, 1998
Author(s)
George R. Jones Jr., Edward F. Kelley
Irreproducibility in some reflection measurement methods arises from the observance of the haze component of reflection (non-regular-specular, non-Lambertian). Because of the haze component, the measured reflection is sensitive to the apparatus

Scanning Height for ANSI C63.5 Calibrations

August 1, 1998
Author(s)
Kenneth H. Cavcey, Dennis G. Camell
The configuration of antennas at an Open Area Test site (OATS) for calibrations results in constructive and destructive electric fields. Regardless of the calibration method used, the antenna to be calibrated should be loacted where the field varies slowly

Size Changes and Interpenetration Within Concentrated Dendrimer Solutions

August 1, 1998
Author(s)
T J. Prosa, Barry J. Bauer, A Topp, Eric J. Amis, R L. Scherrenberg
The field of dendrimer research has grown dramatically in recent years with the synthesis of new materials quickly outpacing the characterization of simple material properties.[1] The lack of dendrimers in sufficient quantities has inhibited the ability to

Size Dependent Electronic Level Structure of InAs Nanocrystal Quantum Dots: Test of Multiband Effective Mass Theory

August 1, 1998
Author(s)
U Banin, J C. Lee, A A. Guzelian, A V. Kadavanich, A P. Alivastos, Garnett W. Bryant, A L. Efros, M Rose, W Jaskolski
The size dependence of the electronic spectrum of InAs nanocrystals ranging in radius from 10 to 35 Angstrom} has been studied by size-selective spectroscopy. An eight-band effective mass theory of the quantum size levels has been developed which describes

Spherical-Wave Characterization of Interior and Exterior Sources

August 1, 1998
Author(s)
David A. Hill
This paper presents the theoretical basis for spherical, near-field scanning in the general case where radiating sources exist both inside and outside the measurement region. The fields are expanded in terms of outgoing spherical waves (due to interior

Spinodal Dewetting of Thin Polymer Films

August 1, 1998
Author(s)
R H. Xie, Alamgir Karim, Jack F. Douglas, Charles C. Han, Robert A. Weiss
Dewetting of polystyrene (PS) films on a silicon substrate is investigated as a function of film thickness, h. We observe the nucleation of holes in the early stage of dewetting for relatively thick films (h > 100 {Angstrom}), as observed previously, but

STEP AP213 Coverage Analysis

August 1, 1998
Author(s)
Shaw C. Feng, Lihong Qiao
This report provides a quantitative coverage analysis of a draft Application Protocol (AP) for numerically controlled machining process plans in an international standard for product data representation and exchange. The analysis addresses the

Structure and Soot Properties of Nonbuoyant Ethylene/Air Laminar Jet Diffusion Flames

August 1, 1998
Author(s)
D L. Urban, Zeng-guang Yuan, Peter B. Sunderland, Gregory T. Linteris, J. E. Voss, Kenneth Lin, Z Dai, Kairan Sun
The structure and soot properties of round, soot-emitting, nonbuoyant, laminar jet diffusion flames are described, based on long-duration (175-230-s) experiments at microgravity carried out on orbit in the Space Shuttle Columbia. Experimental conditions

Survey of Job Shop Scheduling Techniques

August 1, 1998
Author(s)
Albert T. Jones, Luis C. Rabelo
A large number of approaches to the modeling and solution of job shop scheduling problems have been reported in the Operations Research (OR) literature, with varying degrees of success. These approaches revolve around a series of technological advances

Systematic Errors in ab Initio Bond Dissociation Energies

August 1, 1998
Author(s)
Karl K. Irikura
Bond dissociation energies (D o) for 41 small molecules were calculated at 19 levels of ab initio theory up to CCSD(T)/cc-pVTZ, using geometries and vibrational zero-point energies from B3LYP/6-31G* hybrid density-functional calculations. Empirical

The Next Generation of the NIST Watt Balance

August 1, 1998
Author(s)
David B. Newell, Richard L. Steiner, Edwin R. Williams, Alain Picard
Reduction in the total uncertainty of the NIST Watt Balance is limited by the present configuration of the experiment. Most of the major relative uncertainty components arise from the fact that the experiment is performed in air. To reduce the contribution

The NIST EOS Thermal-Infrared Transfer Radiometer

August 1, 1998
Author(s)
Joseph P. Rice, Bettye C. Johnson
A portable thermal infrared transfer radiometer (TXR) has been developed for use in comparisons and scale verifications of sources used to calibrate thermal- infrared (TIR) channels of the National Aeronautics and Space Administration's (NASA's) Earth

Thermodynamic Properties of Air at Pressures to 2000 MPa

August 1, 1998
Author(s)
William M. Haynes, Eric W. Lemmon, Daniel G. Friend, R Jacobsen
A new formulation for the thermodynamic properties of standard dry air at pressures to 2000 MPa has been developed. This formulation, which can be used at temperatures from the freezing liquid line to 2000 K, is based on comprehensive experimental

What Are the Lights on Your Surge Protector Telling You

August 1, 1998
Author(s)
Francois D. Martzloff
Surge-Protective devices (SPD) applied in low-voltage ac power circuits should be provided with appropriate means to disconnect a failed SPD from the power system and provide a clear indication of the SPD status. This objective has not been consistently

Proceedings of the 1998 DARPA/NIST Smart Spaces Workshop

July 30, 1998
Author(s)
Vincent M. Stanford
Given a visionary scenario for the uses of Smart Space and an introduction from Kevin Mills and Jean Scholtz of DARPA, and Marty Herman of NIST on a possible research agenda, the workshop participants were divided into four groups, each addressing a
Displaying 51676 - 51700 of 73697
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