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Journals

Recertification of Standard Reference Material (SRM) 1649, Urban Dust, for the Determination of Polycyclic Aromatic Hydrocarbons (PAHs)

April 1, 2000

Author(s)

Stephen A. Wise, Lane C. Sander, Michele M. Schantz, M. J. Hays, Bruce A. Benner Jr

Calculable Coaxial Resistors for Precision Measurements

April 1, 2000

Author(s)

Randolph E. Elmquist

Physical Aging of Amorphous PEN: Isothermal, Isochronal and Isostructural Results

April 1, 2000

Author(s)

M L. Cerrada, G B. McKenna

The viscoelastic and physical aging responses have been analyzed for an amorphous poly(ethylene naphthalate) (PEN) using uniaxial tension stress relaxation...

Impact of Measurement and Standards Infrastructure on the National Economy and International Trade

April 1, 2000

Author(s)

Hratch G. Semerjian, Robert L. Watters

The U.S. Federal Government has a strong role in metrology R&D in the U.S because of its importance to the nation's economy and the Constitutional authority...

Security and Confidence in IT Products

April 1, 2000

Author(s)

E Roback

Federal organizations need to have an appropriate level of confidence that the security features of IT products work as intended and meet security...

Colloids Reinforce Glass Theory

April 1, 2000

Author(s)

S C. Glotzer

Nobel laureate Phil Anderson wrote in Science in 1995 that the glass transition remains the deepest and most important unsolved problem in solid state physics...

Analytical Modeling of Oxide Thickness Effects on Residual Stresses in Thermal Barrier Coatings

April 1, 2000

Author(s)

C H. Hsueh, Lin-Sien H. Lum

The effects of the thickness of the thermally grown oxide on residual thermal stresses in a plasma-sprayed thermal barrier coating were numerically simulated in...

High Pressure Gas-Coupled Ultrasonic Inspection for Discontinuities

April 1, 2000

Author(s)

R E. Schramm, C M. Fortunko

A liquid couplant is usually necessary between the transducer and the specimen for ultrasonic crack detection and thickness gaging. This work demonstrates the...

Vapor Pressure of the SrPbO₃ Perovskite Phase

April 1, 2000

Author(s)

Lawrence P. Cook, Winnie K. Wong-Ng

The perovskite phase SrPbO 3 is important as a buffer and indicator of PbO chemical potential (at fixed p O2 ) according to the reaction: 2 SrPbO 3 --> Sr 2PbO...

A Recommendation for an Inspection Standard to Control Sub-Surface Damage in Single-Crystal Sapphire Components

April 1, 2000

Author(s)

David R. Black, Robert S. Polvani

A variety of characterization techniques have been investigated to study surface and subsurface damage in single-crystal sapphire. To characterize the damage in...

Droplet Vorticity Alignment in Model Polymer Blends

April 1, 2000

Author(s)

Kalman D. Migler

The shear induced deformation of polymeric droplets in an immiscible polymeric matrix reveals that under conditions of high droplet elasticity, the droplets can...

Relaxation Behavior of Polymer Blends After the Cessation of Shear

April 1, 2000

Author(s)

L Kielhorn, R H. Colby, Charles C. Han

We investigated the relaxation of a binary polybutadiene/polyisoprene blend after the cessation of steady-state shear using both in-situ optical microscopy (OM)...

CODATA Recommended Values of the Fundamental Constants: 1998

April 1, 2000

Author(s)

Peter J. Mohr, Barry N. Taylor

This paper gives the 1998 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on...

Nonrelativistic Ab Initio Calculation of the Interaction Potentials Between Metastable Ne Atoms

April 1, 2000

Author(s)

Svetlana A. Kotochigova, Eite Tiesinga, I Tupitsyn

We compute non-relativistic ab initio electronic potential surfaces for two-metastable 2p 53s neon atoms using a multiconfiguration all-electron valence-bond...

Rotational Spectra of Four of the Five Conformers of 1-Pentene

April 1, 2000

Author(s)

Gerald T. Fraser, L H. Xu, R D. Suenram, C Lugez

The rotational spectra of four of the five expected conformers of 1-pentene, together with their monosubstituted 13C isotopic forms, have been measured in a...

Contribution of Evanescent Waves to the Far-Field: the Atomic Point of View

April 1, 2000

Author(s)

A Rahmani, Garnett W. Bryant

Evanescent modes of the electromagnetic field are seldom invoked in conventional far-field optics, as their contribution far from the source (say a few...

Hydrogenated amorphous silcon germanium Alloys Grown by the Hot-Wire Chemical Vapor Deposition Technique

April 1, 2000

Author(s)

B P. Nelson, Y Xu, D L. Williamsons, B von Roedern, A Mason, S Heck, A. H. Mahan, S F. Schmitt, Alan Gallagher, J Webb, R C. Reedy

We successfully grow high quality hydrogenated amorphous-silicon germanium alloys(a: SiGe:II) by the hot-wire chemical vapor deposition (HWCVD) technique using...

Thermodynamic Properties of Vanadium Silicides. II. Standard Molar Enthalpy of Formation {Δ}_fη_m^o (298.15 K) and Reassessed Thermodynamic Properties of Trivanadium Monosilicide (V3Si)

April 1, 2000

Author(s)

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

Fluorine bomb combustion calorimetric measurements of the energy of the reaction: V 3Si(cr) + (19/2)F 2(g) = 3VF 5(g) + SiF 4(g), have given a value of -(163.3...

A Quantum Chemistry Study of the van der Waals Dimers of Benzene, Naphthalene, and Anthracene: Crossed (D_2d) and Parallel-Displaced (C_2h) Dimers of Very Similar Energies in the Linear Polyacenes

April 1, 2000

Author(s)

Carlos A. Gonzalez, E C. Lim

A quantum chemistry study of the ground-state structures and binding energies of the van der Waals dimers of benzene, naphthalene, and anthracene has been made...

MALDI-TOF MS Analysis of a Library of Polymerizable Cyclodextrin Derivatives

April 1, 2000

Author(s)

Rafael L. Bowen, M Farahani, Sabine H. Dickens, Charles M. Guttman

Polymerizable cyclodextrin derivatives (PCDs) have been proposed as candidates for use in dental therapeutics (Bowen, 1996 and Bowen and Reed, 1997). Here PCD...

Role of Adhesive Interlayer in Transverse Fracture of Brittle Layer Structures

April 1, 2000

Author(s)

H Chai, Brian R. Lawn

The role of a soft adhesive interlayer in determining critical conditions for fracture in brittle layer structures from indentation with hard spheres is...

Modeling the Evolution of the Dynamic Mechanical Properties of a Commercial Epoxy During Cure After Gelation

April 1, 2000

Author(s)

S L. Simon, G B. McKenna, O Sindt

A model for the evolution of the viscoelastic properties of thermosetting polymers during cure has been developed based on the concepts of time-temperature and...

Dye Impregnation Method for Revealing Machining Crack Geometry

April 1, 2000

Author(s)

Yasumitsu Matsuo, M. Sando, L K. Ives, Ryna B. Marinenko, George D. Quinn

An observation technique for machining cracks in ceramics has been developed. Palladium (Pd) nitrate water solution was impregnated into a bending specimen...

Nature of Coupling and Origin of Coercivity in Giant Magnetoresistance NiO-Co-Cu-Based Spin Valves

April 1, 2000

Author(s)

H D. Chopra, D X. Yang, P J. Chen, D Parks, William F. Egelhoff Jr.

The effect of various couplings on the switching field and coercivity in NiO-Co-Cu-based giant magnetoresistance (GMR) bottom spin valves is systematically...

Composition Profiling in a Binary Polymer Blend Thin Film Using Polarized Neutron Reflectivity

April 1, 2000

Author(s)

H Grull, A Schreyer, Norman F. Berk, Charles Majkrzak, Charles C. Han

The concentration profile in an ultra-thin film (film thickness d=440 ) of a high molecular mass poly(isoprene)/deuterated poly(butadiene) blend is measured in...

A Pulsed Laval Nozzle Apparatus With Laser Ionization Mass Spectroscopy for Direct Measurements of Rate Coefficients at Low Temperatures With Condensable Gases

April 1, 2000

Author(s)

S Lee, R J. Hoobler, S R. Leone

A pulsed Laval nozzle, low Mach number supersonic expanison kinetics apparatus has been constructed to study neutral-neutral kinetics by a rather general laser...

Comment on Physical Picture for Light Emission in Scanning Tunneling Microscopy

April 1, 2000

Author(s)

P C. Chaumet, A Rahmani

Comment on Physical Picture for Light Emission in Scanning Tunneling Microscopy

Transition Probability Ratios for Selected Multiplets of CI, NI and OI, and Comparisons With Recent Calculations

April 1, 2000

Author(s)

J Musielok, John M. Bridges, Jeffrey R. Fuhr, Wolfgang L. Wiese

With a wall-stabilized high-current arc, we have measured the transition probabilities of several multiplet pairs of CI, NI and OI. Pairs have been selected for...

Spectroscopy of Autoionizing Doubly-Excited States in Ultracold Na₂ Molecules Produced by Photoassociation

April 1, 2000

Author(s)

A Amelink, Kevin Jones, Paul D. Lett, P Van der Straten, H G. Heideman

We have performed photoassociation spectroscopy to study the doubly-excited states of Na 2 involved in the associative ionization of colliding Na(3P) atoms...

Dynamic Structure Factor of Diamond and LiF Measured Using Inelastic X-Ray Scattering

April 1, 2000

Author(s)

W A. Caliebe, J A. Soininen, Eric L. Shirley, C C. Kao, K Hamalainen

The dynamic structure factors S(q,ω) of diamond and LiF have been measured using inelastic x-ray scattering. The experimental data are compared to results of ab...

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