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Journals

Chemo-Mechanical Machining of Ceramics

October 1, 1999

Author(s)

Richard S. Gates, Stephen M. Hsu

Chemically assisted machining of ceramics is a way to remove ceramic materials rapidly using chemical reactions at the interface between the tool and the...

Nonlinear Propagation of Narrow-Band Rayleigh Waves Excited by a Comb Transducer

October 1, 1999

Author(s)

Donna C. Hurley

Quantitative experiments have been performed to measure the harmonic generation of narrow-band Rayleigh waves in aluminum.

Ceramic Measures: News of the Ceramic Processing Characterization Consortium, October 1999

October 1, 1999

Author(s)

S Jahanmir

The Ceramic Processing Characterization Consortium (CPCC) held its semi annual meeting in Indianapolis on April 25, 1999. The meeting was attended by over 60...

Probing the Location of the Terminal Groups of Dendrimers in Dilute Solution

October 1, 1999

Author(s)

A Topp, Barry J. Bauer, J W. Klimash, R Spindler, D A. Tomalia, Eric J. Amis

The spatial distribution of the terminal groups of poly (amido amine) dendrimers have been determined experimentally by small angle neutron scattering with...

Measurement of the Coherence of a Bose-Einstein Condensate

October 1, 1999

Author(s)

Edward W. Hagley, Lu Deng, M M. Kozuma, M Trippenbach, Y B. Band, M Edwards, M R. Doery, Paul S. Julienne, Kristian Helmerson, S L. Rolston, William D. Phillips

We study the coherence properties of a Bose-Einstein condensates using an interference technique. Two 100 ns optical standing wave pulses are applied to a...

Volumetric Behavior of Athermal Dendritic Polymers: Monte Carlo Simulation

October 1, 1999

Author(s)

L L. Lue

We present results of Monte Carlo simulations for dilute to concentrated solutions of athermal, homogeneous dendritic polymers. The dendritic polymers are...

Molecular Dynamics Study of Water Acetronitrile Mixtures

October 1, 1999

Author(s)

Raymond D. Mountain

The results of a molecular dynamics simulation study of water acetonitrile mixtures over the temperature range 297 K to 415 K are reported. The emphasis is on...

Predicting Unexpected Chemical Reactions by Isopotential Searching

October 1, 1999

Author(s)

Karl K. Irikura, Russell D. Johnson III

The reactions of a chemical system are dictated by the corresponding potential energy surface (PES). Since reasonably accurate PESs are now available from...

Preparation, Characterization, and Value Assignment of Carbon Dioxide Isotopic Reference Materials: RMs 8562, 8563, and 8564

October 1, 1999

Author(s)

R M. Verkouteren

Three carbon dioxide isotopic Reference Materials (RM 8562, RM 8563, and RM 8564) have been prepared and characterized for composition, heterogeneity, and...

Absolute Interferometry With a 670 nm External Cavity Diode Laser

October 1, 1999

Author(s)

Jack A. Stone Jr., Alois Stejskal, Lowell P. Howard

In the last few years there has been much interest in the use of tunable diode lasers for absolute interferometry. Here we report on the use of an external...

Absolute Distance Interferometry with a 670-nm External Cavity Diode Laser

October 1, 1999

Author(s)

Jack A. Stone Jr., Alois Stejskal, Lowell P. Howard

Diode lasers are becoming increasingly important in length metrology. In particular, the tunability of diode lasers makes them attractive for applications such...

Micro X-Ray Fluorescence of Particles Using a Laboratory X-Ray Source and Capillary Optics

October 1, 1999

Author(s)

J R. Swider, Terrence J. Jach, Eric B. Steel

We are developing a micro X-ray fluorescence (micro-XRF) instrument that combines a polycapillary optic with a standalone X-ray tube. The optic transmits and...

Frequency-Dependent Viscosity of Xenon Near the Critical Point

October 1, 1999

Author(s)

Robert F. Berg, Michael R. Moldover, G A. Zimmerli

We used a novel, overdamped oscillator aboard the Space Shuttle to measure the viscosity Η of xenon near its critical density ρ c and temperature T c. In...

Measurement of Electroosmotic Flow in Plastic Imprinted Microfluid Devices and the Effect of Protein Adsorption on Flow Rate

October 1, 1999

Author(s)

Laurie E. Locascio, C E. Perso, C G. Lee

Energy Conserving Discrete Boltzmann Equation for Nonideal Systems

October 1, 1999

Author(s)

Nicos Martys

The BBGKY formalism is utilized to obtain a set of moment equations to be satisfied by the collision operator in an energy conserving discrete Boltzmann...

Effects of Cement Particle Size Disbribution on Performance Properties of Portland Cement-Based Materials

October 1, 1999

Author(s)

Dale P. Bentz, Edward J. Garboczi, C Haecker, O M. Jensen

The original size, spatial distribution, and composition of Portland cement particles have a large influence on hydration kinetics, microstructure development...

Remineralization Effects of A Two-Solution Fluoride Mouthrinse: An in situ Study

October 1, 1999

Author(s)

Laurence C. Chow, Shozo Takagi, Clifton M. Carey, B A. Sieck

Results from previous studies showed that a two-component fluoride (F) rinse is significantly more effective than a NaF rinse of the same F content 250 g/g (ppm...

Diffusion in Partially Saturated Porous Materials

October 1, 1999

Author(s)

Nicos Martys

The diffusive transport of ions in two classes of porous media was studied as a function of fluid saturation and wetting properties. A lattice Boltzmann method...

Ultrasensitive Surface Spectroscopy With a Miniature Optical Resonator

October 1, 1999

Author(s)

A C. Pipino

The number density and orientation of molecules at a surface can be probed with extremely high sensitivity by employing a miniature total-internal-reflection...

An Accurate Method for Measuring the Dielectric Constant of Printed Wiring Board Materials

October 1, 1999

Author(s)

Nicholas G. Paulter Jr.

Microwave Network Analyzers: A Discussion of Verification Methods

October 1, 1999

Author(s)

Ronald A. Ginley

Comparison of Microwave and Mutual Inductance Measurements of the Inductive Nonlinearity of HTS Thin Films

October 1, 1999

Author(s)

John H. Claassen, James Booth, James A. Beall, Leila R. Vale, David A. Rudman, Ronald H. Ono

Complex Permittivity of Some Ultra-Low Loss Crystals at Cryogenic Temperature

October 1, 1999

Author(s)

Jerzy Krupka, Kristof Derzakowski, M. E. Tobar, J. G. Hartnett, Richard G. Geyer

Abstracting Formal Specifications to Generate Software Tests via Model Checking

October 1, 1999

Author(s)

P E. Ammann, Paul E. Black

A recent method combines model checkers with specification-based mutation analysis to generate test cases from formal software specifications. However high...

Statistics of Shear-Induced Rearrangements in a Two-Dimensional Model Foam

October 1, 1999

Author(s)

S Tewari, D Schiemann, D J. Durian, C M. Knobler, Stephen A. Langer, A J. Liu

Under steady shear, a foam relaxes stress through intermittent rearrangements of bubbles accompanied by sudden drops in the stored elastic energy. We use a...

XPS Study of the Dehydration of Clay and Kaolin Powders

October 1, 1999

Author(s)

T N. Wittberg, P S. Wang

X-ray photoelectron spectroscopy (XPS) was used to analyze samples of a commercial clay powder and a kaolin standard. Samples were analyzed both in the as...

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...

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