An official website of the United States government
Here’s how you know
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.
This paper studies the role of age, w/c ratio, and curing temperature on the drying shrinkage of cement paste that occurred during drying in two large relative
Characteristic x-ray production with energetic electrons depends strongly on the overvoltage, the ratio of the incident beam energy to the critical excitation
Since 1984 the International Organization for Standardization (ISO) has been working on the development of a comprehensive standard for the electronic exchange
Terrell A. Vanderah, W Febo, Julia Y. Chan, Robert S. Roth, J. M. Loezos, L D. Rotter, Richard G. Geyer, B A. Reisner, Dennis B. Minor
Subsolidus phase equilibria in the CaO:Al2O3:Nb2O5 system at 1325 C in air have been determined. One ternary phase forms, Ca2AlNbO6, which exhibits a perovskite
A new derivative of Arizona sand, ISO Medium Test Dust, is coming into use as a liquid optical particle count calibrant. ISO Medium Test Dust and optical
C M. Neubauer, Edward Garboczi, Hamlin M. Jennings
Materials with heterogeneous microstructures do not deform uniformly under stress (mechanical or environmental). A new deformation mapping technique (DMT)
H M. Berman, Talapady N. Bhat, P E. Bourne, Z. Feng, G L. Gilliland, H Weissig, J Westbrook
The determination of structures on a genomic scale in a high-throughput mode will have an impact on every aspect of the Protein Data Bank (PDB) - the single
Vapor-liquid equilibria for the title system indicate azeotropic behavior with the composition of the azeotrope shifting from being benzene-rich at low pressure
The air flow through a vane-cascade swirl generator is examined both experimentally and numerically to characterize the inlet combustion air flow entering a
This paper describes the application of microwave holography to infrared (IR) thermal images of electromagnetic (EM) fields for the purpose of measuring near
Yicheng Wang, Martin Misakian, Amanda N. Goyettes, James K. Olthoff
We report ion energy distributions (IEDs), relative ion intensities, and absolute total ion current densities at the grounded electrode of an inductively
David A. Wollman, John M. Martinis, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Norman F. Bergren, Steven Deiker, Martin Huber, Dale Newbury
Improved x-ray detector technology continues to be a critical metrological need in the semiconductor industry for contaminant particle analysis 1,2 and for high
R Raghavan, Mark R. VanLandingham, Xiaohong Gu, Tinh Nguyen
Characterization of polymer coating surfaces is crucial to understanding and predicting the long-term performance of coatings in aggressive environments. The
An experimental non-mechanical image rotation using a pair of crossed acousto-optic beam deflectors and a polygon mirror is described.Image rotation is
D M. Potrepka, J. I. Budnick, A R. Moodenbaugh, Daniel A. Fischer, W A. Hines
Zero-field 63,65Cu nuclear quadrupole resonance (NQR) and nuclear magnetic resonance (NMR) spectra were obtained at 1.3 K for powdered samples of Y 1-xCa xBa
This paper will provide a high level overview of MatML, an extensible markup language (XML) for materials property data. MatML is being developed in order to
A new Technical Working Area (TWA) has been established with the broad aim of developing and standardising methods for the characterisation of ceramic powders
Robert McMichael, C G. Lee, John E. Bonevich, P J. Chen, W. Wyatt Miller, William F. Egelhoff Jr.
Anisotropy fields in excess of 120 kA/m (1500 Oe) have been produced in 3-5 nm- thick polycrystalline films of Co by oblique sputtering of Ta underlayers. The
Alamgir Karim, D W. Liu, Jack F. Douglas, A Nakatani, Eric J. Amis
We investigate the influence of surface modified filler particles on the phase stability of a model blend of polystyrene (PS) and polybutadiene (PB). The upper
R Erdmann, D A. Branning, W P. Grice, L A. Walmsley
It is a well-known and remarkable fact that in certain coincidence photon counting experiments with cw-pumped parametric downconverters, the effects of group
D. B. Pollock, Thomas L. Murdock, Raju V. Datla, Ambler Thompson
The lack of accurate calibration sources is preventing the current sensor technology from achieving the minimum possible uncertainty levels in remote-sensing
We construct an analytical wavefunction in the phase-amplitude formalism to describe collisions between two neutral atoms. This wavefunction is valid from
We demonstrate that the stability of the current optical frequency comb generated by a Kerr-lens mode-locked laser is limited by the microwavereference used for
Alternate deposition and anneal cycles involving the deposition of 100 of Pd metal and annealing at 350 C are used to grow thick Pd 2Si films on Si(111). The
The adiabatic dissociation dynamics of NH 2D( )and ND 2H( ) have been probed by time-resolved Fourier transform infrared emission spectroscopy. A product-state