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Conferences

Portable High Accuracy Double Spectrometer for Ultraviolet Spectral Irradiance Measurements

July 23, 1999

Author(s)

E A. Thompson, E A. Early

A portable high accuracy double spectrometer for ultraviolet (UV) spectral irradiance measurements has been under development at the National Institute of...

A Study of Turn-Around Time for Selected Thermodynamic, Dimensional, and Mechanical Calibrations

July 15, 1999

Author(s)

G J. Rosasco

We have made a study of the turn-around time performance for the calibration services offered by the Process Measurements Division. The calibration process was...

New Primary Standards for Air Speed Measurement at NIST

July 15, 1999

Author(s)

Vern E. Bean, J. M. Hall

NIST has changed its primary standard for air speed measurements from a Pitot tube to a fiber optic laser Doppler anemometer (LDA). In earlier times, the Pitot...

Gloss Measurements at NIST

July 12, 1999

Author(s)

Maria E. Nadal, E A. Early, E A. Thompson

Specular gloss is the attribute of an object that causes it to have a shiny or lustrous appearance, and is commonly used to quantitatively evaluate appearance...

Applicability of Correlations Between the Species Formation and the Global Equivalence Ratio in a 1/2-Scaled ISO Compartment With Nongaseous Fuel.

July 5, 1999

Author(s)

C J. Wieczorek, U Vandsburger, B Lattimer, C McKay

Lifestyle developments on the global scale which manifest themselves in increased travel, increased elderly populations in assisted care facilities, and...

Acquisition, Analysis and Reporting of Fire Plume Data for Fire Safety Engineering

July 5, 1999

Author(s)

D T. Sheppard, B J. Meacham

In order to undertake engineering analyses and designs that can be readily accepted by building and fire authorities, fire protection engineers need engineering...

Mixed Layer Pyrolysis Model for Polypropylene

July 5, 1999

Author(s)

Kathryn M. Butler

A one-dimensional model describing the melting, degradation, and bubbling behavior of polypropylene exposed to a high heat flux is presented. The region of...

Particulate Entry Lag in Spot-Type Smoke Detectors

July 5, 1999

Author(s)

Thomas G. Cleary, Artur A. Chernovsky, William L. Grosshandler, Michael D. Anderson

It is well documented that alarm signals from spot-type smoke detectors (ionization and photoelectric) are delayed when the threshold value has been achieved...

Modeling of Sprinkler, Vent and Draft Curtain Interaction

July 5, 1999

Author(s)

Kevin B. McGrattan, Anthony P. Hamins, Glenn P. Forney

The International Fire Sprinkler, Smoke & Heat Vent, Draft Curtain Fire Test Project organized by the National Fire Protection Research Foundation (NFPRF)...

Numerical Modeling of Counterflow Diffusion Flames Inhibited by Iron Pentacarbonyl

July 5, 1999

Author(s)

M D. Rumminger, Gregory T. Linteris

This paper presents the first detailed numerical study of the extinction of methane-air counterflow diffusion flames by the super-effective agent iron...

Thermophysical Property Computer Packages from NIST of Interest to the Natural Gas Industry

July 1, 1999

Author(s)

Marcia L. Huber, Daniel G. Friend, Eric W. Lemmon

We discuss three computerized databases distributed by the Standard Reference Data (SRD) program of NIST, which are of interest to the natural gas industry.

Validating Uncertainty Analyses for Gas Flow Standards via Intra- and Inter-Laboratory Comparisons

July 1, 1999

Author(s)

John D. Wright, D B. Ward, G E. Mattingly

The Fluid Flow Group (FFG) at NIST maintains flow standards to perform calibrations of gas flowmeters over the 3.7 x 10 -2 L/min to 78,000 L/min flow range...

Lattice Boltzmann Simulations of Single and Multi-Component Flow in Porous Media

July 1, 1999

Author(s)

Nicos Martys, John G. Hagedorn, J E. Devaney

We examine the utility of the lattice Boltzmann method for modeling fluid flow in porous media. First the lattice Boltzmann method is validated for the case of...

Measurement of the Rheological Properties of Cement Paste: A New Approach

July 1, 1999

Author(s)

Chiara F. Ferraris

This paper presents a new approach for predicting the rheological properties of concrete from rheological measurements on cement paste and from concrete...

Flat Panel Display Metrology -- Less than Meets the Eye

July 1, 1999

Author(s)

Edward F. Kelley

Accurate measurement of electronic displays has become important in recent years owing to the advances in flat panel display technologies. A well-defined...

Modern Wavelength Standards in the Ultraviolet and Vacuum Ultraviolet

July 1, 1999

Author(s)

Joseph Reader, Craig J. Sansonetti

In recent work at the National Institute of Standards and Technology the Atomic Spectroscopy Group has characterized several sources of wavelength standards...

Methods to Remove Distortion Artifacts in Scanned Projections

July 1, 1999

Author(s)

A R. Kalukin, Zachary H. Levine, Charles S. Tarrio, S P. Frigo, I McNulty, S S. Wang, C C. Retsch, M Kuhn, B Winn

Atrifacts induced by distortions which sometimes occur in two-dimensional projection images can appear in the resulting tomographic reconstructions. We describe...

Extensions of the Single-Integral-Equation Method

July 1, 1999

Author(s)

Egon Marx

Scattering of electromagnetic waves by homogeneous dielectric or finitely conducting bodies can be reduced to the solution of integral equations. In the simpler...

Developing Data and Database Standards in Science: Some Challenges and How CODATA Can Help Meet Them

July 1, 1999

Author(s)

J R. Rumble

The triple revolutions caused by advanced computers, advanced informatics and the Internet have changed forever the way scientific and technical data are stored...

Thin-Film Calibration Wafer Materials for RTP Temperature Measurement

July 1, 1999

Author(s)

Kenneth G. Kreider, John G. Gillen

We are developing an instrumented calibration wafer for radiometric temperature measurements that uses thin-film thermocouples to minimize the thermal...

Errors and Uncertainties in Radar Cross Section Measurements

July 1, 1999

Author(s)

Lorant A. Muth, Robert T. Johnk, D. F. Novotny

Reference Standards, Uncertainties, and the Future of the NIST Electronic Kilogram

July 1, 1999

Author(s)

Richard L. Steiner, David B. Newell, J. Schwarz, Edwin R. Williams

The National Institute of Standards and Technology (NIST) watt balance experiment recently made a new determination of Planck's constant with a relative...

Stray Light Elimination in Making Projection Display Measurements

July 1, 1999

Author(s)

Paul A. Boynton, Edward F. Kelley

Electronic front-projection display specifications are often based on measurements made in ideal darkroom conditions. However, not everyone has access to such a...

Electron Collision Cross Sections Derived from Critically Assessed Data

July 1, 1999

Author(s)

Loucas G. Christophorou, James K. Olthoff

Electron-molecule collisions are among the most fundamental processes in gas discharges. They are also the precursors of the ions and the radicals which drive...

Negative Ion-Neutral Reactions in Townsend Discharges

July 1, 1999

Author(s)

James K. Olthoff, MVVS. Rao

Relative intensities and translational ion-flux energy distributions are presented for negative ions sampled from Townsend discharges in O 2, SF 6, and CF 4 for...

Cryogenic Microcalorimeters for X-Ray Microanalysis

July 1, 1999

Author(s)

David A. Wollman, Gene C. Hilton, Kent D. Irwin, Norman F. Bergren, David A. Rudman, Dale Newbury, John M. Martinis

The Co-Conical Field Generation System - A 40 GHz Antenna Calibration Cell

July 1, 1999

Author(s)

David R. Novotny, Arthur Ondrejka, Robert T. Johnk

A prototype test cell for generating standard fields suitable for antenna calibrations from DC to 40 GHz has been developed and tested.

Far-Field Antenna Patterns Determined from Infrared Holograms

July 1, 1999

Author(s)

Carl F. Stubenrauch, J. D. Norgard, J. E. Will, Katherine MacReynolds

In this paper, we describe a technique based on optical holography which allows determination of the amplitude and phase of an unknown antenna on a near-field...

Spray Flame Measurements for CFD Model Validation

July 1, 1999

Author(s)

J F. Widmann, S R. Charagundla, Cary Presser

Experimental data were collected for the purpose of validating multiphase combustion models and submodels. A spray combustor was fabricated that permits well...

Rockwell Hardness - A Method-Dependent Standards Reference Material

July 1, 1999

Author(s)

Samuel Low, R Gettings, Walter S. Liggett Jr, Jun-Feng Song

Rockwell hardness is a method-dependent measurement of the deformation of a material in response to an applied force. It is not a fundamental physical property...

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