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Journals

Interaction of Citric or Hydrochloric Acid With Calcium Fluorapatite: Precipitation of Calcium Fluoride

September 1, 1999

Author(s)

D N. Misra

The interaction of citric acid (H 3Ci) with calcium fluorapatite (Ca 10 F 2(PO 4) 6) was explored for two reasons: (i) to determine the role of the acid in the

Switching Mechanism of Single Domain Particles in a Two-Dimensional Array

September 1, 1999

Author(s)

Martha Pardavi-Horvath, G Vertesy, B Keszei, Z Vertesy, Robert D. McMichael

The mechanism of switching of uniaxial, single domain, single crystalline epitaxial garnet particles on a 2D square array was investigated. The anisotropy field

Lead-Free Solders: A Change in the Electronics Infrastructure

September 1, 1999

Author(s)

C A. Handwerker

The infrastructure for electronics assembly has, from its infancy, been based on tin-lead solder (Sn/Pb), a mixture of tin and lead in the ratio of

Three-Body Wear of a Hand-Consolidated Silver Alternative to Amalgam

September 1, 1999

Author(s)

Hockin D. Xu, F Eichmiller, Anthony A. Giuseppetti, L K. Ives, Edward E. Parry, Gary E. Schumacher

Recent studies have investigated a mercury-free silver alternative to amalgam, but the silver powders required a relatively high compaction pressure to

Fundamental Constants, QED, and the Proton Form Factor

September 1, 1999

Author(s)

Peter J. Mohr, Barry N. Taylor

Most of the fundamental constants are obtained by the comparison of the results of critical experiments and theoretical expressions for these results. Many of

Failure of Single-Configuration Dirac-Fock Wave Functions in the Nonrelativistic Limit

September 1, 1999

Author(s)

Yong Sik Kim, Paul Indelicato, J P. Desclaux

We have found earlier that a certain type of multiconfiguration Dirac-Fock wave functions may not have the correct nonrelativistic limit in the spin quantum

A Heterodyne Interferometer With Subatomic Periodic Nonlinearity

September 1, 1999

Author(s)

C M. Wu, John R. Lawall, R Deslattes

A new to our knowledge heterodyne interferometer for differential displacement measurements is presented. It is, in principle, free of periodic nonlinearity. A

Accurate Estimates of Infinite-Dilution Chemical Potentials of Small Hydrocarbons in Water via Molecular Dynamics Simulation

September 1, 1999

Author(s)

J T. Slusher

The infinite dilution chemical potentials of methane, ethane, propane, benzene in water are precisely estimated using the single charging integral method

Modification of the Electrokinetic Properties of Reversible Electrophoresis Gels for the Separation and Preparation of DNA

September 1, 1999

Author(s)

Kenneth D. Cole, R Nguyen, C M. Tellez-Rodriguez

The effect of adding linear polymers to a novel reversible electrophoretic media was measured. Reversible gels are formed using the polyanionic carbohydrate

Analysis of Environmentally Induced DNA Damage by Capillary Electrophoresis

September 1, 1999

Author(s)

Z E. Nackerdien, B Siles, S Nivens, Donald H. Atha

Chemical pollutants, ionizing radiation, the products of aerobic metabolism and UV light are important metabolic and environmental factors contributing to DNA

The Ionization Energy of CF₃: When Does Entropy Matter in Gas-Phase Reactions?

September 1, 1999

Author(s)

Karl K. Irikura

A minor controversy has emerged recently over the value of the ionization energy of the trifluoromethyl radical, CF 3. Apparently solid evidence supports both

Information Modeling: From Design to Implementation

September 1, 1999

Author(s)

Yung-Tsun T. Lee

Today's manufacturing industry greatly relies on computer technology to support activities throughout a product's life cycle. Effective and efficient

Structured Markup on the Web: A Tale of Two Sites

September 1, 1999

Author(s)

Joshua Lubell

Business and organizations are increasingly finding that HTML (Hyper-Text Markup Language)offers no help whatsoever in managing the information on their web

A Policy Perspective on Electronic Commerce

September 1, 1999

Author(s)

E Maxwell, S A. Wakid, J A. Moline

On July 1, 1997, President Clinton issued A Framework for Global Electronic Commerce identifying nine areas in which international agreements would be needed in

A Capacitance Standard Based on Counting Electrons

September 1, 1999

Author(s)

Mark W. Keller, A P. Chen, John M. Martinis, Neil M. Zimmerman

A capacitance standard based directly on the definition of capacitance was built.

Growth Rate Dependence of the Thermal Conductivity of Chemical-Vapor-Deposited Diamond

September 1, 1999

Author(s)

N M. Balzaretti, A Feldman, E S. Etz, R Gat

The in-plane thermal diffusivity of chemical-vapor-deposited diamond films was measured as a function of diamond-growth rate. The films, 0.1-0.4 mm thick, were

Elastic Constants and Internal Friction of an SiC-Fiber-Reinforced Ti-Alloy-Matrix Crossply Composite: Measurement and Theory

September 1, 1999

Author(s)

H Ogi, K Takashima, H M. Ledbetter, Martin Dunn, G Shimoike, M Hirao, P Bowen

The complete elastic-constant tensor C ij and the corresponding internal friction Q y-1 for a cross-ply composite are measured.

Load-Bearing Behavior of a Simulated Craniofacial Structure Fabricated From a Hydroxyapatite Cement and Bioresorbable Fiber-Mesh

September 1, 1999

Author(s)

A S. Von Gonten, James F. Kelly, Joseph M. Antonucci

lcium phosphate cements (CPC) have proven successful in the repair of small, non-stress bearing skeletal defects. These cements do not have sufficient tensile

Fracture Toughness (K_IC) of a Dental Porcelain Determined by Fractographic Analysis

September 1, 1999

Author(s)

Susanne Scherrer, J R. Kelly, George D. Quinn, K Xu

Fractographic analysis of indentation cracks is performed following flexure testing as part of the ASTM (1997) standard for fracture toughness, K Ic

Polarization Distribution in Ceramic-Polymer Nanocomposites

September 1, 1999

Author(s)

P Bloss, A S. DeReggi, H J. Glasel, E Hartmann, D Hirsch, H Schafer

We report pyroelectric responsivity versus depth profiles in nanocomposites of powdered barium titanate and tripropylene glycol diacrylate obtained by using the

Transient Target Patterns in Phase Separating Filled Polymer Blends

September 1, 1999

Author(s)

Alamgir Karim, Jack F. Douglas, G Nisato, D W. Liu, Eric J. Amis

Recent simulations have indicated that the presence of filler particles in a phase separating blend can induce the development of composition waves having the

Radiometric Measurement Comparisons Using Transfer Radiometers in Support of the Calibration of NASA's Earth Observing System (EOS) Sensors

September 1, 1999

Author(s)

James J. Butler, B. Carol Johnson, Steven W. Brown, Howard Yoon, R Barnes, B L. Markham, S F. Biggar, E F. Zalewski, P R. Spyak, J W. Cooper, F Sakuma

EOS satellite instruments operating in the visible through the shortwave infrared wavelength regions (from 0.4 um to 2.5 um) are calibrated prior to flight for

Vortices in a Bose-Einstein Condensate

September 1, 1999

Author(s)

M R. Matthews, B P. Anderson, P C. Haljan, C E. Wieman, Eric A. Cornell

We have created vortices in two-component Bose-einstein condensates. The vortex state was created through a coherent process involving the spatial and temporal

Onset of Fermi Degeneracy in a Trapped Atomic Gas

September 1, 1999

Author(s)

B. L. DeMarco, Deborah S. Jin

An evaporative cooling strategy that uses a two-component Fermi gas was employed to cool a magnetically trapped gas of 7 x 10 5 40K atoms to 0.5 of the Fermi

Transmission Near-Field Scanning Microscope for Infrared Chemical Imaging

September 1, 1999

Author(s)

B Dragnea, J Preusser, W Schade, S R. Leone, W D. Hinsberg

We report transmission infrared near-field scanning microscopy (IR-NSOM) imaging of chemically amplified photoresist polymers patterned by ultraviolet exposure

Precision X-Ray Spectroscopy at the NIST Electron-Beam Ion Trap: Resolution of Major Systematic Error

September 1, 1999

Author(s)

T. Han, D J. Paterson, Lawrence T. Hudson, F Serpa, John D. Gillaspy, E Takacs

Some of the most critical tests of the QED Lamb shifts are currently being pursued in the X-ray regime by investigating the core levels of medium Z atoms such

Isochoric Heat Capacity of Heavy Water at Subcritical and Supercritical Conditions

September 1, 1999

Author(s)

B A. Mursalov, Ilmutdin Abdulagatov, V I. Dvoryanchikov, A N. Kamalov, S B. Kiselev

The heat capacity of heavy water was measured in the temperature range from 294 to 746 K and at densities between 52 and 1105 kgm -3 using a high-temperature

Quantification of a Single Component Gas in Air with a Microhotplate Gas Sensor Using Partial Least Squares Techniques

September 1, 1999

Author(s)

J. Ding, T. J. McAvoy, Richard E. Cavicchi, Stephen Semancik

Microhotplate gas sensors can be operated in rapid temperature programmed sensing (TPS) modes due to their small size and mass. The temperature sequences can be

Non-Self-Similar Modes of Vibration of a Bose-Einstein Condensate

September 1, 1999

Author(s)

M Brewczyk, Charles W. Clark, M Lewenstein, K Rzazewski

A hydrodynamical version of the time-dependent Gross-Pitaevskii equation is used to describe driven vibrations of a Bose-Einstein condensate of 87Rb atoms in a

Sub-Threshold Characteristics of Laterlly Gated AlGaAs/InGaAs pHEMT Fabricated with Focused Ion Beam Implantation

September 1, 1999

Author(s)

W. F. Tseng, David H. Monk

We have used a focused ion beam (FIB) technique to fabricate laterally gated AlGaAs/InGaAs pseudomorphic high electron mobility transistors (pHEMTs), and have

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