NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 51576 - 51600 of 73697

Towards STEP-Based Data Transfer in Layered Manufacturing

September 1, 1998
Author(s)
D Dutta, Anil Kumar, Mike Pratt, Ram D. Sriram
This paper concerns the informational requirements of layered manufacturing (LM). The most common industrial use of LM today is for rapid prototyping, but we take a wider view of it as a flexible fabrication technology. Its use in building functional

Trace Element Detection at Nanometer Scale Spatial Resolution

September 1, 1998
Author(s)
Dale E. Newbury
Trace elemental constituents present in materials at concentration levels below 0.01 mass fraction can exert significant control on important electronic, optical, chemical, and mechanical properties. Detecting and measuring trace constituents while

Visualization of Dendrimer Molecules by Transmission Electron Microscopy (TEM): Staining Methods and Cryo-TEM of Vitrified Solutions

September 1, 1998
Author(s)
C L. Jackson, H D. Chanzy, F P. Booy, B Drake, D A. Tomalia, Barry J. Bauer, Eric J. Amis
Images of individual dendrimer molecules of poly(amidoamine) (PAMAM) from generation 10 (G10) to G5 were imaged by conventional transmission electron microscopy (TEM) after staining with aqueous sodium phosphotunstate. The dendrimers were resolved as

Exploration of the Structural Environment of the Iron-Sulfur Cluster in Putidaredoxin by Nitrogen-15 NMR Spectroscopy of Selectively Labeled Cysteine Residues

August 28, 1998
Author(s)
Fahriye N. Sari, Marcia J. Holden, M P. Mayhew, V L. Vilker, B Coxon
Putidaredoxin is a di-iron protein whose paramagnetic region is not well characterized by 1H detected NMR. We have studied the structure of this region in greater detail by directly observed 15N NMR of oxidized and reduced putidaredoxin preparations in

A VRML Integration Methodology for Manufacturing Applications

August 24, 1998
Author(s)
Sanford P. Ressler, Afzal A. Godil, Quandou (. Wang, G S. Seidman
This paper describes several methods for using the Virtual Reality Modeling Language (VRML) as the visualization integration tech-nology for manufacturing simulation systems. One of our goals was to develop an integration methodology based on the use of

Reliability of Conformance Tests

August 21, 1998
Author(s)
Robert C. Hagwood, Raghu N. Kacker, James H. Yen, D L. Banks, Lynne S. Rosenthal, Leonard J. Gallagher, Paul E. Black
A conformance test is a software assurance test that is applied in order to determine if specification requirements of the software are being met. It is a time-dependent model, where the software object is subjected to an a priori known test suite. The

Diffraction Anomalous Fine Structure Study of Strained GA 1-x In x As on GaAs(001)

August 20, 1998
Author(s)
Joseph C. Woicik, J O. Cross, Charles E. Bouldin, Bruce D. Ravel, J G. Pellegrino, B W. Steiner, S G. Bompadre, L B. Sorensen, K E. Miyano, J P. Kirkland
Diffraction anomalous fine-structure measurements performed at both the Ga and As K edges have determined the Ga-As bond length to be 2.442 ± 0.005 {Angstrom} in a buried, 213 {Angstrom} thick Ga^0.78^In 0.22As layer grown coherently on GaAs(001). This

Elastic and Inelastic Collisions of Cold Spin-Polarized 133 Cs Atoms

August 17, 1998
Author(s)
P J. Leo, Eite Tiesinga, Paul S. Julienne, T G. Walker
We present theoretical calculations of thermally averaged elastic cross sections and spin relaxation rates in the temperature range 1 {micro}K to 300 {micro}K for magnetically trapped doubly polarized Cesium atoms. The calculations reproduce the recent

NIST Atomic Spectra Database (1998)

August 13, 1998
Author(s)
Daniel E. Kelleher, William C. Martin, Wolfgang L. Wiese, J Sugar, Craig J. Sansonetti, Jeffrey R. Fuhr, Joseph Reader, Arlene Musgrove, Karen J. Olsen, Peter J. Mohr, G R. Dalton

Interface Morphology During Crystal Growth: Effects of Anisotropy and Fluid Flow

August 12, 1998
Author(s)
Sam R. Coriell, B T. Murray, A A. Chernov, Geoffrey B. McFadden
We treat the effect of shear flows on the morphological stability of a crystal growing from solution by a step mechanism at a given constant velocity. We carry out some calculations for a shear flow that is sinusoidal in time.The interaction of fluid flow

Determination of the Conformations of cAMP Receptor Protein and Its T127L/S128A Mutant with and without cAMP from Small Angle Neutron Scattering Measurements

August 7, 1998
Author(s)
Susan Krueger, I Gorshkova, J W. Brown, J Hoskins, K H. McKenney, Frederick P. Schwarz
Small angle scattering measurements were performed on solutions of cAMP receptor protein (CRP) and on solutions of the T127->A double mutant of CRP (DM) in D 2O K 3PO 4 buffer containing 0.6 M KCl, in the absence and presence of 3',5' cyclic adenosine
Displaying 51576 - 51600 of 73697
Was this page helpful?