Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

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...

Playing with Fire and Fibers; Annealing Optical Fiber: Applications, Properties, and Dealing with Detrimental Effects

September 1, 1999

Author(s)

Allen Rose

If done properly, the annealing of optical fiber can produce useful fiber components.

Removing Optical Artifacts in Near-Field Scanning Optical Microscopy by Using a Three Dimensional Scanning Mode

September 1, 1999

Author(s)

C. E. Jordan, Stephan J. Stranick, Lee J. Richter, Richard R. Cavanagh

We demonstrate a method of acquiring near-field scanning optical microscopy data that allows for the construction of three different types of images from one...

The Role of Electrophilic and General-Base Catalysis is the Mechanism of Escherichia Coli Uracil DNA Glycosylase

September 1, 1999

Author(s)

A C. Drohat, J. Jagadeesh, E Ferguson, J T. Stivers

Escherichia coli uracil DNA glycosylase (UDG) catalyzes the hydrolysis of premutagenic uracil bases in DNA by flipping the deoxyuridine from the DNA helix...

Object Retrieval and Access Management in Electronic Commerce

September 1, 1999

Author(s)

S A. Wakid, John Barkley, Mark Skall

Electronic commerce over the Internet is now tens of billions of dollars per year and growing. This article describes how objects used in EC can be located and...

Graphical Tools for RFLP Measurement Quality Assurance: Laboratory Performance Charts

September 1, 1999

Author(s)

K T. Gary, David L. Duewer, D J. Reeder

Forensic restriction fragment length polymorphism analyses typically provide two band size results at each genetic locus for each sample. In collaboration with...

Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation

September 1, 1999

Author(s)

A P. Roberts, Edward Garboczi

A three-dimensional model of a tungsten-silver composite is statistically constructed from an experimental two-dimensional image. The effective Young's modulus...

Critical Locus of Aqueous Solutions of Sodium Chloride

September 1, 1999

Author(s)

A A. Povodyrev, M A. Anisimov, J V. Sengers, W L. Marshall, Jan V. Sengers

Graphical Tools for RFLP Measurement Quality Assurance: Laboratory Performance Charts

September 1, 1999

Author(s)

David L. Duewer, K T. Gary, D J. Reeder

Leakage and Counting Errors in a Seven-junction Electron Pump

September 1, 1999

Author(s)

Richard L. Kautz, Mark W. Keller, John M. Martinis

Leakage and counting errors are explored experimentally in a well-characterized seven-junction electron pump and compared with predictions of the orthodox...

Quantum Dynamics of Interstital H₂ in Solid C₆₀

September 1, 1999

Author(s)

Stephen A. FitzGerald, Taner N. Yildirim, L. J. Santodonato, Dan A. Neumann, John R. Copley, John J. Rush

A Mobile Sensor Platform for Construction Metrology and Automation: Design and Initial Results

August 31, 1999

Author(s)

L E. Pfeffer

At NIST, we are creating a test-bed to support experimental research in construction-site metrology and automation. We are extending our previous test-bed to...

Biographical Memoirs Lyman James Briggs

August 31, 1999

Author(s)

P B. Myers, Johanna Levelt Sengers

This is a biographical memoir of Dr. Lyman Briggs written for the Proceedings of the National Academy of Sciences. Dr. Briggs began his career in 1896 as a soil...

Magnetic Reversal of Ultra-Thin Films with Planar Magnetization

August 25, 1999

Author(s)

R Hyman, A Zangwill, Mark D. Stiles

Classical spin simulations are used to study magnetic reversal in ultra-thin (1-6 monolayers) films with planar magnetization and surface roughness typical of...

Exchange Coupling in Magnetic Multilayers Grown on Iron Whiskers

August 20, 1999

Author(s)

John Unguris, Robert Celotta, D Tulchinsky, Daniel T. Pierce

Meaningful tests of theoretical predictions of magnetic multilayer properties require the fabrication of multilayers with nearly the same atomic scale precision...

Was this page helpful?