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Journals

TEM Study of the Electron-Doped Layered La_2-2xCA_1+2xMn₂0₇ : Orthorhombic Phase in 0.8

March 1, 2001

Author(s)

Leonid A. Bendersky, R Chen, I D. Fawcett, M Greenblatt

A series of Ruddlesden-Popper compounds with n = 2 and stoichiometry La 2-2xCa 1+2xMn 20 7 were synthesized by a citrate gel technique and studied by TEM for...

Development of Low Cost (Sr,Ca)₃Al₂O₆ Dielectrics for Bi₂Sr₂CaCu₂O_8+δ Applications

March 1, 2001

Author(s)

T J. Haugan, Winnie K. Wong-Ng, Lawrence P. Cook, Richard G. Geyer, H J. Brown, L Swartzendruber, James A. Kaduk

The development of low-cost (Sr,Ca)3Al2O6 dielectrics for Bi2Sr2CaCu2O8+d superconductor applications was investigated. The (Sr,Ca)3Al2O6 phase was determined...

Traveling Wave Solutions for Bistable Differential-Difference Equations With Periodic Diffusion

March 1, 2001

Author(s)

C E. Elmer, E S. Vanleck

We consider traveling wave solutions to spatially discrete reaction-diffusion equations with nonlocal variable diffusion and bistable nonlinearities. For the...

Brittle Fracture Versus Quasi Plasticity in Ceramics: A Simple Predictive Index

March 1, 2001

Author(s)

Y W. Rhee, H W. Kim, Y N. Deng, Brian R. Lawn

Simple relations for the onset of competing brittle and quasi plastic damage modes in Hertzian contact are presented. The formulations are expressed in terms of...

The Infrared Spectra of the NH₃-d_n⁺ Cations Trapped in Solid Neon

March 1, 2001

Author(s)

Warren E. Thompson, Marilyn E. Jacox

When a dilute mixture of NH 3 in neon is subjected to Penning ionization and/or photoionization by neon atoms in their first excited states, between 16.6 eV and...

Rotation Dependence of Electric Quadrupole Hyperfine Interaction in the Ground State of Molecular Iodine by High-Resolution Laser Spectroscopy

March 1, 2001

Author(s)

F L. Hong, J Ye, L -. Ma, S Picard, C J. Borde, J L. Hall

Doppler-free high-resolution spectroscopy is applied to molecular iodine at 532 nm by Nd:YAG lasers. The main hyperfine components as well as the crossover...

Modeling Illumination-Mode Near-Field Optical Microscopy of Au Nanoparticles

March 1, 2001

Author(s)

A Liu, A Rahmani, Garnett W. Bryant, Lee J. Richter, Stephan J. Stranick

We present a theoretical analysis of near-field scanning optical microscopy (NSOM) images of small Au particles made in illumination mode. We model the metal...

Spectrum and Energy Levels of Singly-Ionized Mercury (Hg II)

March 1, 2001

Author(s)

Craig J. Sansonetti, Joseph Reader

The spectrum of singly-ionized mercury (Hg II) has been observed from 500 to 9880 with sliding sparks and pulsed-RF discharges on 10.7-m grating spectrographs...

Modeling Final-State Interaction Effects in Inelastic X-Ray Scattering From Solids: Resonant and Non-Resonant

March 1, 2001

Author(s)

Eric L. Shirley, J A. Soininen, G Zhang, J A. Carlisle, T A. Calcott, D L. Ederer, L J. Terminello, R C. Perera

We present resonant inelastic x-ray scattering calculations that realistically incorporate intermediate-state electron-core hole interactions and final-state...

Adjusting the Values of the Fundamental Constents

March 1, 2001

Author(s)

Peter J. Mohr, Barry N. Taylor

In order to compare theoretical predictions to experimental measurements in many basic studies and applications of physics, it is necessary to know the value of...

Ugo Fano (1912-2001) - Obituary

March 1, 2001

Author(s)

Charles W. Clark

An obituary of Ugo Fano (1212-2001), member of the National Bureau of Standards staff from 1946 to 1966.

Raman Scattering Evidence of a Disordered Structural Phase Transition in La_1.475Nd_0.4Sr_0.125CuO₄

March 1, 2001

Author(s)

B Nachumi, N Ichikawa, Y Nakamura, S Uchida

We investigated the temperature and polarization dependence of the Raman scattering intensity of a single crystal sample of La 1,475Nd 0.4Sr 0.125CuO 4 which is...

Biotechnology: A Look Ahead

March 1, 2001

Author(s)

G B. Vasquez

The editorial article is a forward-looking examination of biotechnology and where it is heading. The biotechnology impacts on medicine, tissue engineering, and...

The Raman Spectra of Cr₃O₈ and Cr₂O₅

March 1, 2001

Author(s)

James E. Maslar, Wilbur S. Hurst, Terrell A. Vanderah, Igor Levin

The Raman spectra of polycrystalline Cr 3O 8 and Cr 2O 5 powders were measured. The powders were prepared by thermal decomposition of CrO 3 under flowing oxygen...

Quantum Chemistry

March 1, 2001

Author(s)

Carlos A. Gonzalez

In this short essay, the current status of quantum chemistry as well as the future challenges this discipline have to face in order to become a useful tool in...

Introduction to ISO 10303 - the STEP Standard for Product Data Exchange

March 1, 2001

Author(s)

Mike Pratt

Since 1984 the International Organization for Standardization (ISO)has been working on the development of a comprehensive standard for the electronic exchange...

Shape-Sensitive Linewidth Measurement with the SEM Using a Model-Based Library

March 1, 2001

Author(s)

John S. Villarrubia, Andras Vladar, J R. Lowney, Michael T. Postek

In semiconductor electronics manufacturing, device performance often depends upon size. For example, microprocessor speed is linked to the width of transistor...

Measuring Frequency Response of High-Speed Optical Receivers Requires Microwave Measurements

March 1, 2001

Author(s)

Paul D. Hale, Tracy S. Clement, Dylan F. Williams

Measuring the frequency response of an optical receiver is easy if you have a standard reference receiver, a simple test setup, and a network analyzer to...

New Optomechanical Technique for Measuring Layer Thickness in MEMS Processes, Journal of Microelectromechanical Systems

March 1, 2001

Author(s)

Janet M. Cassard

Dimensional metrology improvements are needed to achieve the fabrication of repeatable devices. This research presents a new optomechanical technique for...

State-of-the-Art Research Is the Future of Fire Investigation

March 1, 2001

Author(s)

Daniel M. Madrzykowski

Researchers at the National Institute of Standards and Technology's Building and Fire Research Laboratory are working with the U.S. Fire Administration; the...

A Tool for Modeling Airflow & Contaminant Transport

March 1, 2001

Author(s)

William S. Dols

Multizone modeling refers to annalysis techniques that use a simplified, zonal representation of a building to study building airflows, pressure differences...

Computer Modeling of the Replacement of Coarse Cement Particles by Inert Fillers in Low W/C Ratio Concretes: Hydration and Strength

March 1, 2001

Author(s)

Dale P. Bentz, J T. Conway

In concretes with water-to-cement (w/c) ratios below about 0.38, a portion of the cement particles will always remain unhydrated due to space limitations within...

Effects of Elevated Temperature Exposure on Heating Characteristics, Spalling, and Residual Properties of High Performance Concrete

March 1, 2001

Author(s)

Long T. Phan, James R. Lawson, Frank L. Davis

Results of part of an ongoing research program, being conducted at the National Institute of Standards and Technology (NIST) to study effects of elevated...

Critical Properties and Phase Separation in Lattice Boltzmann Fluid Mixtures

March 1, 2001

Author(s)

Nicos Martys, Jack F. Douglas

Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, interfacial profile, correlation length) are...

Optical Path Difference Measurement Techniques for SLMs

March 1, 2001

Author(s)

Patrick J. Grother, D P. Casasent

A simple measurement method to obtain 2-D spatial point-by-point optical path difference (OPD) data for spatial light modulators (SLMs) is described. A simple...

Effect of a Water Rinse on Labile Fluoride and Ether Ions in Plaque and Saliva Before and After Conventional and Experimental Fluoride Rinses

March 1, 2001

Author(s)

Gerald L. Vogel, Z Zhang, Laurence C. Chow, Gary E. Schumacher

Labile reservoirs are important in maintaining ion concentrations in oral fluids, especially after a fluoride dentifrice application, where a persistent...

An ab Initio Study of the Kinetics of the Reactions of Halomethanes with the Hydroxyl Radical. 3. Kinetic Parameters Predictions for the Potential Halon Replacements CH₂FBr, CHFBr₂, CHFClBr, CHCl₂Br, and CHClBr₂

March 1, 2001

Author(s)

F Louis, Carlos A. Gonzalez, Robert E. Huie, Michael J. Kurylo III

Vapor Entraining Magnetic Mixer for Reaction and Equilibrium Applications

March 1, 2001

Author(s)

Thomas J. Bruno, Michael C. Rybowiak

Mixing of fluids is a central component to innumerable operations in chemical processing on the plant floor and also in many laboratory operations. Most mixing...

Effects of Elastic-Electron Scattering on Measurements of Silicon Dioxide Film Thicknesses by X-Ray Photoelectron Spectroscopy

March 1, 2001

Author(s)

Cedric J. Powell, Aleksander Jablonski

It is now customary for the effects of elastic-electron scattering to be ignored in measurements of the thicknesses of overlayer films by X-ray photoelectron...

Standardization of Cardiac Troponin I Assays: Round Robin of Ten Candidate Reference Materials

March 1, 2001

Author(s)

R. H. Christenson, S. H. Duh, F. S. Apple, G. S. Bodor, David M. Bunk, J. J. Dalluge, Mauro Panteghini, J. D. Potter, Michael J. Welch, A. H. Wu, S. E. Kahn

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