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Journals

Prompt-Gamma Activation Analysis using the k₀ Approach

August 1, 1998

Author(s)

G L. Molnar, Z S. Revay, Rick L. Paul, Richard M. Lindstrom

Characterization of a Cold Neutron Beam from a Curved Guide

August 1, 1998

Author(s)

David F. Mildner, Huaiyu H. Chen-Mayer, George P. Lamaze, V. A. Sharov

Sorption and Diffusion of Water, Salt Water and Concrete Pore Solution in Composite Matrices

August 1, 1998

Author(s)

Joannie W. Chin, Tinh Nguyen, K Aouadi

In recent years, the use of fiber-reinforced polymer composites in civil infrastructure has been promoted as a solution to the deterioration of bridges...

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...

Feasibility of Applying a Stable Isotopic Tracer for Direct Determination of Dry Particulate Deposition to Soybean Plants

August 1, 1998

Author(s)

William R. Kelly, J M. Hoff, P V. Borgoul, G Tuncel, J M. Ondov, L T. Chen

Development of Electroacoustic Methods and Their Application in Ceramic Processing

August 1, 1998

Author(s)

Vincent A. Hackley

The development of particle characterization methods based on electroacoustic effects is reviewed and their application in various areas of ceramic powder...

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...

Kamlet-Taft Solvatochromic Parameters of the Sub- and Supercritical Fluorinated Ethane Sovents

August 1, 1998

Author(s)

A F. Lagalante, R L. Hall, Thomas J. Bruno

The Kamlet-Taft solvatochromic parameters describing the dipolarity-Polarizability, hydrogen bond donation ability, and hydrogen bond acceptor ability forethane...

AMS and Microprobe Analysis of Combusted Particles in Ice and Snow

August 1, 1998

Author(s)

S R. Biegalski, George A. Klouda, R Weissenbok, Lloyd A. Currie, Robert A. Fletcher

Ice cores and snow pits of the cryosphere contain particles that detail the history of past atmospheric air compositions. Some of these particles result from...

Matching Pursuit Filters Applied to Face Identification

August 1, 1998

Author(s)

P J. Phillips

We present a face identification algorithm that automatically processes an unknown image by locating and identifying the face. The heart of the algorithm is the...

On the Validity of the Poisson Hypothesis for Low-Level Counting; Investigation of the Distributional Characteristics of Background Radiation with the NIST Individual Pulse Counting System

August 1, 1998

Author(s)

George A. Klouda, Lloyd A. Currie, E M. Eijgenhuijsen

Does radioactive decay follow the Poisson distribution?--a fundamental question to which the theoretical answer seems to be, Yes. On the practical side, the...

Low-Temperature Elastic Constants of Polycrystalline Indium

August 1, 1998

Author(s)

Sudook A. Kim, H M. Ledbetter

Using an ultrasonic pulse-echo method, we measured the elastic constants of polycrystalline indium from 300 K to 5K. All elastic constants showed regular...

Mechanical hardness: A Semiempirical Theory Based on Screened Electrostatics and Elastic Shear

August 1, 1998

Author(s)

D G. Clerc, H M. Ledbetter

The equation H = Agh, is the first to describe the mechanical hardness H of materials having arbitrary crystal structure or bonding type.

Elastic and Inelastic Collisions of Cold Spin-Polarized ¹³³Cs Atoms

August 1, 1998

Author(s)

P J. Leo, Eite Tiesinga, Paul S. Julienne, D K. Walter, S Kadlecek, T G. Walker

We present theoretical calculations of thermally averaged elastic cross sections and spin-relaxation rate coefficients in the temperature range 0.1 to 300 K for...

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...

Mathematical Analyses of AC Voltammetry of a Surface Confined Redox Process

August 1, 1998

Author(s)

W T. Yap

AC measurements have found wide application in various fields of research such as impedance spectroscopy in corrosion science and the familiar cyclic...

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...

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-...

Plane Wave Integral Representation for Fields in Reverberation Chambers

August 1, 1998

Author(s)

David A. Hill

A plane wave integral representation is presented for well-stirred fields in a reverberation chamber. The representation automatically satisfies Maxwell's...

Coolant Flow in Surface Grinding with Non-Porous Wheels

August 1, 1998

Author(s)

P Hryniewicz, A Z. Szeri, S Jahanmir

A parameter that is often used in the assessment of cooling efficiency in grinding is the amount of fluid that flows through the grinding zone. This paper shows...

BoneSource Hydroxyapatite Cement: A Novel Biomaterial for Craniofacial Skeletal Tissue Engineering and Reconstruction

August 1, 1998

Author(s)

C D. Friedman, P D. Costantino, Shozo Takagi, Laurence Chow

BoneSource hydroxyapatite cement is a new self-setting calcium phosphate cement biomaterial. Its unique and innovative physical chemistry coupled with enhanced...

¹⁴C Measurements of Sub-Milligram Carbon Samples From Aerosols

August 1, 1998

Author(s)

R Weissenbok, S R. Biegalski, D Klinedinst, R Golser, George A. Klouda, W Kutschera, A Priller, William N. Rom, P Steier, E Wild, Lloyd A. Currie, R F. Sekerka

Accelerator mass spectrometry [AMS] at the milligram level is routinely performed, but it is difficult to go substantially below 100 ug of carbon. We discuss...

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...

High Heat Flux Sensors Calibration Using Blackbody Radiation

August 1, 1998

Author(s)

A V. Murthy, Benjamin K. Tsai, Robert D. Saunders

This paper deals with the radiative calibration aspects of high heat flux sensors using blackbody radiation. Several heat flux sensors were calibrated up to...

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)...

Negative Ion Emission from a Stainless Steel Surface Due to Positive Ion Collisions

August 1, 1998

Author(s)

S. G. Walton, R. Champion, Yicheng Wang

Absolute yields of negative ions and secondary electrons resulting from positive ions impacting a stainless steel surface have been determined as a function of...

The Role of the National Committee for Clinical Laboratory Standards (NCCLS) and the National Institute of Standards and Technology (NIST) in Voluntary Consensus

July 31, 1998

Author(s)

W Koch

Speech presented to the Japanese Committee for Clinical Laboratory Standards (JCCLS). The National Committee for Clinical Laboratory Standards (NCCLS) and JCCLS...

A Thermodynamic Investigation of Reactions Catalyzed by Tryptophan Synthase

July 27, 1998

Author(s)

N Kishore, Yadu D. Tewari, D Akers, Robert N. Goldberg, E. W. Miles

Microcalorimetry and high-performance liquid chromatography have been used to conduct a thermodynamic investigation of the following reactions catalyzed by the...

Methods for Absolute Reflectance Measurement of Transmissive Materials in the Infrared

July 19, 1998

Author(s)

Leonard M. Hanssen, Simon G. Kaplan

Four methods for the measurement of absolute reflectance are described and compared, with particular emphasis on application to transmissive materials such as...

Kinetics and Mechanism of the Reaction of NH₂ with O₂ in Aqueous Solutions

July 15, 1998

Author(s)

B Laszlo, Z B. Alfassi, Pedatsur Neta, Robert E. Huie

The reaction of NH 3 with OH or SO 4 radicals produces the aminyl radical, NH 2. Pulse radiolysis and laser flash photolysis techniques were utilized to study...

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