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Journals

Domain-Engineered Pyroelectric Radiometer

December 1, 1999

Author(s)

John H. Lehman, George P. Eppeldauer, J A. Aust, M. Racz

We built a large-area domain-engineered pyroelectric radiometer with high spatial and spectral response uniformity that is an excellent primary transfer

High-Speed Resonant Cavity Enhanced Photodiodes

December 1, 1999

Author(s)

M. S. {Umlat}nl{umlat}, E. Vzbay, E. Towe, Richard Mirin, David H. Christensen

We have demonstrated RCE Schottky phodiodes with GaAs absorption regions in AlGaAs/AlAs microcavities (3).

A New Method to Measure the Distance Between Graduation Lines on Graduate Scales

December 1, 1999

Author(s)

William B. Penzes, Richard A. Allen, Michael W. Cresswell, Loren W. Linholm, E C. Teague

Fast and Accurate Low-Coherence Interferometric Measurements of Fiber Bragg Grating Dispersion and Reflectance

November 22, 1999

Author(s)

Shellee D. Dyer, Kent B. Rochford, Allen Rose

We demonstrate fast and accurate measurements of fiber Bragg grating dispersion and spectral reflectance using low-coherence interferometry.

Two-Dimensional Index Profiling of Fibers and Waveguides

November 20, 1999

Author(s)

N. H. Fontaine, M. Young

We have constructued a two-dimensional refracted-ray scanner that can resolve index-of-refraction increments of approximately 4 x 10 -5. this resolution is an

Ion-Exchanged Waveguide Lasers in Er³⁺/Yb³⁺ Codoped Silicate Glass

November 20, 1999

Author(s)

P. M. Peters, David S. Funk, A P. Peskin, D. L. Veasey, Norman Sanford, S. N. Houde-Walter, Joseph S. Hayden

We investigated an Er 3+ /Yb 3+ codoped silicate glass as a host material for waveguide lasers operating near 1.5 micro (mu).

Microhotplate Gas Sensor Arrays

November 18, 1999

Author(s)

Richard E. Cavicchi, Stephen Semancik, R M. Walton, B Panchapakesan, Don L. DeVoe, M I. Aquino-Class, J D. Allen, John S. Suehle

In this work, micromachining and planar processing has been used to achieve solid state sensing devices with lower power consumption at lower cost. The small

Lessons from 342 Medical Device Failures

November 17, 1999

Author(s)

D Wallace, David R. Kuhn

Today's highly complex systems often contain software. Lessons can be learned about softwaredevelopment and assurance concerning quality practices, from system

Determination of Texture From Individual Grain Orientation Measurements

November 17, 1999

Author(s)

J Blendell, Mark D. Vaudin, Lin-Sien H. Lum

We present a technique for determining the texture of a polycrystalline material based on the measurement of the orientation of a number of individual grains

Using Chaos to Generate White Noise

November 15, 1999

Author(s)

Richard L. Kautz

Numerical simulations reveal that a phase-locked loop can be operated in a chaotic regime to generate a high level of noise which is approximately white over a

The Differential Adsorption of Phenol Derivatives onto a Polymeric Sorbent: A Combined Molecular Modeling and Expermential Study

November 11, 1999

Author(s)

K L. Mardis, A J. Glemza, B J. Brune, G F. Payne, M K. Gilson

Oxygenated aromatic compounds (OACs) are used for the synthesis of a variety of commercial products. Lignin from wood and other plant products are potential

Reorientation of Tetradecylmethylviologen on Gold Upon Co-Adsorption of Decanethiol and its Medition of Electron Transfer to Nitrate Reductase

November 9, 1999

Author(s)

Vytautas Reipa, S L. Yeh, H G. Monbouquette, V L. Vilker

Decanethiol was coadsorbed with tetradecylmethyl viologen (C 14MV; 1-Methyl-1 -tetradecyl-4,4 -bipyridinium chloride) on gold electrodes in order to improve

Evolution of Density Fluctuations to Lamellar Crystals in Linear Polyethylene

November 8, 1999

Author(s)

Y A. Akpalu, Eric J. Amis

Structure formation during the isothermal crystallization of a linear polyethylene (M w = 32,1000 g/ mol, M w/M n = 1.1) has been monitored by simultaneous real

The Engineering of Mind

November 2, 1999

Author(s)

James S. Albus

While the mind remains a mysterious and inaccessible phenomenon, many of the components of mind, such as perception, behavior generation, knowledge

A First Stop Towards Photorealistic Rendering of Coated Surfaces and Computer Based Standards of Appearance

November 1, 1999

Author(s)

Fern Y. Hunt, Egon Marx, G W. Meyer, Theodore V. Vorburger, P A. Walker, H B. Westlund

We seek to explore the feasibility of producing computer graphic images to visualize the color and gloss of surfaces using optical and surface topographical

High-Temperature Properties of Liquid-Phase-Sintered Α-Sic

November 1, 1999

Author(s)

R P. Jensen, William E. Luecke, N P. Padture, Sheldon M. Wiederhorn

We have characterized the high-temperature subcritical crack growth and oxidation resistance of a liquid-phase-sintered (LPS) SiC with 20% volume fraction

Off- Diagonal Elastic Constants in Fiber-Reinforced Composites

November 1, 1999

Author(s)

H M. Ledbetter, C M. Fortunko, Paul R. Heyliger

We present an alternative to the usual rod-resonance and pulse-echo measurement methods for determining off-diagonal C ij. The new approach - acoustic resonance

Stress Rupture of Lead-Free Soldered Joints Used to Assemble Copper Plumbing Systems

November 1, 1999

Author(s)

Richard J. Fields, D A. Shepherd, A Cohen, A Kireta

In 1993, the National Institute of Standards and Technology (NIST), formerly NBS, was engaged to develop the necessary elevated temperature allowable stress

Microstructure and Elastic-Constant Measurements of Two-Phase Materials

November 1, 1999

Author(s)

H M. Ledbetter, Martin Dunn

Considering two-phase materials, we focus on the relationship between microstructure and physical properties, especially elastic constants. Microstructure

Filler-Induced Composition Waves in Phase-Separating Polymer Blends

November 1, 1999

Author(s)

B P. Lee, Jack F. Douglas, S C. Glotzer

The influence of a dilute concentration of filler particles on polymer blend phase separation is investigated computationally using a generalization of the Cahn

Charge Lamp BAsed on MgH RAdiation

November 1, 1999

Author(s)

S Ukegawa, Alan Gallagher

We report the efficacy and spectrum of an inductively-coupled, radio-frequency discharge in mixtures of magnesium (Mg), hydrogen (H 2), and argon vapor. The

Deployment Test of the NIST EOS Thermal-Infrared Transfer Radiometer

November 1, 1999

Author(s)

Joseph P. Rice, S C. Bender, W H. Atkins, Francis J. Lovas

The National Institute of Standards and Technology (NIST) Thermal-infrared Transfer Radiometer (TXR), developed for the National Aeronautics and Space

Thermodynamic Properties of Vanadium Silicides. I. Standard Molar Enthalpy of Formation δ_fH of Vanadium Disilicide (VSi₂) at the Temperature of 298.15 K

November 1, 1999

Author(s)

P A. O'Hare, K Watling, G A. Hope

The massic energy of combustion of vanadium disilicide in fluorine according to the reaction: VSi 2(cr) + (13/2)F 2(g) = VF 5(g) + 2SiF 4(g), has been measured

Detection and Quantification Capabilities and the Evaluation of Low-Level Data: Some International Perspectives and Continuing Challenges

November 1, 1999

Author(s)

Lloyd A. Currie

The minimum amounts or concentrations of an analyte that may be detected or quantified by a specific measurement process (MP) represent fundamental performance

Boat Conformations: Synthesis, NMR Spectroscopy, and Molecular Modeling of Methyl 2,6-Anhydro-3-Deoxy-3-Phthalimido-Α-D-Mannopyranoside and its ¹⁵N-Labeled Analog

November 1, 1999

Author(s)

B Coxon

Methyl 2,6-anhydro-3-deoxy-3-phthalimido-α-D-mannopyranoside and its 15N-labeled analog have been synthesized by reaction of methyl 2,6:3,4-dianhydro-α-D

Rotating-Wave-Plate Stokes Polarimeter for Differential Group Delay Measurements of Polarization-Mode Dispersion

November 1, 1999

Author(s)

Paul A. Williams

We present a description and detailed error analysis of a polarization-mode dispersion measurement system which used the Jones matrix eigenanalysis measurement

Mode-coupled artifact standard for polarization-mode dispersion: design, assembly, and implementation

November 1, 1999

Author(s)

Paul A. Williams

A stack of quasi-randomly oriented quartz plates has been assembled as a calibration artifact for mode-coupled polarization-mode dispersion. The design of the

Why Pb(B,B')O₃ Perovskites Disorder at Lower Temperatures than Ba(B,B')O₃ Perovskites

November 1, 1999

Author(s)

Benjamin P. Burton, Eric J. Cockayne

Fully relaxed, planewave pseudopotential calculations of total energies were performed for three ordered perovskite related supercells in each of the eight

Direct Blind Deconvolution

November 1, 1999

Author(s)

Alfred S. Carasso

Blind deconvolution seeks to deblur an image without knowing the cause of the blur. Iterative methods are commonly applied to that problem, but the iterative

Interlaboratory 'Pilot Run' Study of Small Heat-Flow-Meter Apparatus for ASTM C 518

November 1, 1999

Author(s)

Robert R. Zarr, E S. Lagergren

Thermal conductivity measurements of a high-density glass-fiber thermal insulation material near 24 C are presented for the determination of the precision and