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Journals

Optical Band Gap Dependence on Composition and Thickness of In_xGa_1-xN(0 less than} x less than} 0.25) Grown on GaN

October 1, 1999

Author(s)

C A. Parker, J C. Roberts, S M. Bedair, M J. Reed, S X. Liu, N A. El-Masry, Larry Robins

Band gap measurements have been carried out in strained and relaxed In xGa 1-xN epilayers with x > 0.25. Values of x were determined from x-ray diffraction (XRD...

Lattice Model of Living Polymerization I. Basic Thermodynamic Properties

October 1, 1999

Author(s)

J Dudowicz, Karl Freed, Jack F. Douglas

A Flory-Huggins type model of living polymerization is formulated, incorporating chain stiffness, variable initiator concentration and polymer-polymer...

Watching a Superfluid Untwist Itself: Recurrence of Rabi Oscillations in a Bose-Einstein Condensate

October 1, 1999

Author(s)

M R. Matthews, B P. Anderson, P C. Haljan, D S. Hall, Juana S. Williams, C E. Wieman, Eric A. Cornell

The order parameter of a condensate with two internal states can continuously distort in such a way as to remove twists that have been imposed along its length...

Initial- and Final-State Alignment and Orientation Effects in Ca Energy Pooling

October 1, 1999

Author(s)

Harold V. Parks, S R. Leone

An experimental investigation is performed to determine the initial- and final-state alignment effects in the energy-pooling process Ca(4s4p 3P 1) + Ca(4s4p 1P...

Dynamics of Collisional Alignment in Supersonic Expansions: Trajectory Studies of He + Co, O₂ and CO₂

October 1, 1999

Author(s)

J R. Fair, David Nesbitt

Classical trajectory calculations have been performed on experimentally determined intermolecular potentials for He-O 2, He-CO, and He-CO 2 in order to simulate...

The Structure and Ground State Dynamics of Ar-IH

October 1, 1999

Author(s)

A McIntosh, Z Wang, J Castillo-Chara, R R. Lucchese, J W. Bevan, R D. Suenram, A C. Legon

The structure and ground state dynamics of the atom-diatom dimer interaction between Ar and HI has been investigated by microwave and near infrared supersonic...

Electron Collision Cross Section Data For Plasma Modeling

October 1, 1999

Author(s)

W M. Huo, Yong Sik Kim

An overview of the current status in electron collision cross section database for plasma modeling is presented. Emphasis is on dissociation, ionization, and...

Kinetic Study of the Reactions of CF₃O₂ Radicals with Cl and NO

October 1, 1999

Author(s)

F Louis, Donald R. Burgess Jr., M Rayez, J P. Sawerysyn

Kinetic studies of the reactions CF 3O 2 + Cl and CF 3O 2 + NO were performed at room temperature in the gas phase using the discharge flow/mass spectrometric...

The Injecting Energy at Molecule/Metal Interfaces: Implications for Conductance of Molecular Junctions From an Ab-Initio Molecular Description

October 1, 1999

Author(s)

S Yaliraki, A. E. Roitberg, Carlos A. Gonzalez, V Mujica, M Ratner

To study the electronic transport of molecular wire circuits, we present a time-independent scattering formalism which includes an \it ab-initio} description of...

Thermodynamic Properties of Air from 60 to 2000 K at Pressures up to 2000 Mpa

October 1, 1999

Author(s)

M D. Panasiti, Eric Lemmon, S G. Penoncello, R. T. Jacobsen, Daniel G. Friend

A thermodynamic property formulation for standard dry air based upon experimental P-p-T, heat capactiy, and speed of sound data and predicted values, which...

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

October 1, 1999

Author(s)

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

Erbium and Ytterbium Waveguide Lasers in Phosphate Glass

October 1, 1999

Author(s)

David S. Funk, P. M. Peters, D. L. Veasey, Norman Sanford, Joseph S. Hayden

Video Surveillance Equipment Selection and Application Guide

October 1, 1999

Author(s)

A G. Lieberman, D J. Atkinson, V J. Pietrasiewicz, K E. Junker

The guide begins with a discussion of typical video surveillance assignments, that is, a definition of user requirements for the law enforcement and corrections...

Robust SOLT and Alternative Calibrations for Four-Sampler Vector Network Analyzers

October 1, 1999

Author(s)

Jeffrey Jargon, Roger Marks, D. K. Rytting

This paper assesses the accuracy of several proposed lumped-element calibration techniques for four-sampler vector network analyzers in the face of imperfectly...

Characterizing Lumped-Element Calibrations for Four-Sampler Vector Network Analyzers

October 1, 1999

Author(s)

Jeffrey Jargon, Roger Marks, D. K. Rytting

An Improved Empirical Correlation for the Thermal Conductivity of Propane

October 1, 1999

Author(s)

M L. Ramires, Carlos A. Nieto de Castro, Richard A. Perkins

New experimental data on the thermal conductivity of propane have been reported since the wide-range correlations proposed by Holland et al. And by Younglove...

Effect of Heating Boundary Conditions on Pool Boiling Experiments

October 1, 1999

Author(s)

J Darabi, M M. Ohadi, M A. Fanni-Tabrizi, S V. Dessiatoun, Mark A. Kedzierski

The two widely used experimental methods for pool boiling experiments are evaluated. Boiling heat transfer data employing either the water or electric heating...

The Role of Solid State¹³C NMR Spectroscopy in Studies of the Nature of Native Celluloses

October 1, 1999

Author(s)

R H. Atalla, David L. VanderHart

Published spectroscopic observations pertaining to the crystal structure of native celluloses are reviewed for the purpose of defining our current level of...

Full-Wave Analysis of a Split-Cylinder Resonator for Nondesructive Permittivity Measurements

October 1, 1999

Author(s)

Michael D. Janezic, James R. Baker-Jarvis

This paper presents a full-wave analysis of the split-cylinder resonator. We outline a model where the fringing fields are rigorously accounted for and the...

New Antenna Positioner Improves NIST's Capabilities

October 1, 1999

Author(s)

G. Kangiser, Dennis G. Camell

Antenna and electric field probe calibration requires precise positioning and movement throughout a known RF field Measurements are usually made in an anechoic...

NORAMET Comparison of Gauge Block Measurement by Optical Interferometry

October 1, 1999

Author(s)

Jennifer Decker, A Lapointe, John R. Stoup, M V. Alonso, J R. Pekelsky

A varied assortment of 47 new and used steel, ceramic, chromium carbide and tungsten carbide gauge blocks from 9 manufacturers, ranging in length from 05. mm to...

Boltzmann Analysis of Electron Swarm Parameters in CF₄ Using Independently Assessed Electron-Collision Cross Sections

October 1, 1999

Author(s)

M. C. Bordage, P. Segur, Loucas G. Christophorou, James K. Olthoff

Using independently assessed electron-collision cross sections, electron swarm parameters were calculated via the solution of the Boltzmann equation under the...

Recent Developments in Detector-Based Photometry and Future Needs in Photometry

September 30, 1999

Author(s)

Yoshihiro Ohno

A group of standard photometers are now used to realize, maintain, and transfer the photometric units at the National Institute of Standards and Technology...

Stress Intensity Factor Coefficients for Chevron-Notched Flexure Specimens and a Comparison of Fracture Toughness Methods

September 30, 1999

Author(s)

J A. Salem, L -. Ghosn, M G. Jenkins, George D. Quinn

The Chevon notch test method was analyzed to determine whether straight through crack assumption or slice models fitted finite elements better. New polynomial...

Effect of Roughness, Frustration, and Antiferromagnetic Order on Magnetic Coupling of Fe/Cr Multilayers

September 29, 1999

Author(s)

Daniel T. Pierce, John Unguris, Robert Celotta, Mark D. Stiles

The interplay between interfacial disorder and the antiferromagnetic order in Cr leads to complex behavior in Fe/Cr multilayers. Measurements of interlayer...

Interlayer Exchange Coupling

September 29, 1999

Author(s)

Mark D. Stiles

The extensive research done on interlayer exchange coupling in transition metal multilayers has resulted in a deep understanding of this coupling and a...

Numerical Prediction of Permeability Using a Lattice Boltzmann Method and Optical Coherence Tomography

September 23, 1999

Author(s)

Frederick R. Phelan Jr., Joy Dunkers, C G. Zimba, Kathleen M. Flynn, Richard~undefined~undefined~undefined~undefined~undefined Parnas, R C. Peterson, X Li, J G. Fujimoto

A rapid, non-destructive technique called optical coherence tomography (OCT) is used to image the microstructure of an epoxy/e-glass composite. The raw OCT data...

Simulation of Diamond-Ground Surfaces

September 17, 1999

Author(s)

P Koshy, L K. Ives, S Jahanmir

State-of-the-art models available for predicting the characteristics of diamond-ground surfaces entail digitization of wheel topography which limits their...

A Crossover Equation for the Thermodynamic Properties of Mixtures of Lightand Heavy Steam in the Critical Region

September 16, 1999

Author(s)

K S. Abdulkadirova, M A. Anisimov, Jan V. Sengers, Johanna Levelt Sengers

A crossover equation, developed for the thermodynamic properties of H 2O and D 2O in the critical region, has been extended to mixtures of H 2O and D 2O. The...

Chlorination Chemistry I: Rate Coefficients, Reaction Mechanisms, and Spectra of the Chlorine and Bromine Adducts of Propargyl Halides

September 16, 1999

Author(s)

D B. Atkinson, Jeffrey W. Hudgens

Cavity ring-down spectroscopy (CRDS), end-product analysis, and ab initio calculations have determined the reaction rate coefficients, mechanisms and...

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