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.
Fracture from indentation by a hard sphere on bilayer systems composed of curved brittle coating layers on compliant polymeric substrates is investigated, in...
J D. Buchanan, T P. Hase, B K. Tanner, Cedric J. Powell, William F. Egelhoff Jr.
The correlation between grain size and intermixing in sputter deposited bilayers of the form X/Al and Al/X has been investigated by in-plane grazing incidence x...
K Fahey, P Dunne, L McKinney, G O'Sullivan, E Sokell, J White, Alejando Aguilar-Mendoza, Joshua M. Pomeroy, Joseph N. Tan, B Blagojevic, E O. LeBigot, John D. Gillaspy
R S. DaBell, R D. Suenram, R J. Lavrich, J M. Lochner, M W. Ellzy, K B. Sumpter, J O. Jensen, A C. Samuels
The rotational spectra of diethyl methylphosphonate (DEMP), diethyl ethylphosphonate (DEEP), and diisopropyl methylphosphate (DIMP) have been acquired using...
Y I. Baranov, Walter J. Lafferty, Gerald T. Fraser
The intensities of the collision-induced absorption (CIA) bands associated with the electric-dipole forbidden O2 fundamental and the CO2 1/2 2 Fermi dyad...
Sang-Mo Koo, Jin-Ping Han, Eric M. Vogel, Curt A. Richter, J. Vahakangas, Akira Fujiwara
Silicon nanowire (SiNW) field effect transistors (FETs) with channel widths down to 20 nm have been fabricated by a conventional 'top-down?approach using...
Nanoindenter tip bluntness modifies the depth-dependent hardness relationship given by the Nix-Gao model. At shallow depths, fewer geometrically necessary...
Scott Diddams, James C. Bergquist, Steven R. Jefferts, Christopher W. Oates
In this paper we review state-of-the-art atomic time and frequency standards and discuss some of their uses in science and technology. After fifty years of...
Avinash Dundigalla, Sheng Lin-Gibson, F Ferreiro, M M. Malwitz
The unusual structure of poly-ethylene-oxide and Laponite clay in transparentnanocomposite films was investigated using scanning electron, atomic force, optical...
Thermal conductivity measurements of four thermal insulation reference materials are presented. The measurements were obtained from an international...
A study is made of fracture from cyclic loading of WC spheres on the surfaces of brittle layers on compliant substrates, as representative of repetitive...
W.Bertrand (Randy) Doriese, James A. Beall, Steven Deiker, William Duncan, S. L. Ferreira, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, Joel Ullom, Leila R. Vale, Yizi Xu
We present experimental results from a four-pixel array of transition-edge-sensor, x-ray microcalorimeters read out through a single amplifier channel via a...
We use a matrix Boltzmann equation formalism to test the accuracy of Slonczewski's theory of spin-transfer torque in thin-film heterostructures where a non...
Rockwell hardness (HR) is a valuable and widely used indentation hardness test for evaluating mechanical properites of metallic materials. For the Rockwell...
Kevin L. Silverman, Richard Mirin, Steven T. Cundiff
Coupling between InGaAs/GaAs quantum dots is investigated using differential transmission spectroscopy. Two-color pump-probe techniques are used to spectrally...
U Sterr, C Degenhardt, H Stoehr, Ch. Lisdat, H Schnatz, J Helmcke, F Riehle, G Wilpers, Christopher W. Oates, Leo W. Hollberg
We describe the current status of the optical calcium frequency standard with laser-cooled neutral atoms realized in two different laboratories for the purpose...
Spherically-symmetric droplet combustion experiments were performed in an effort to better understand the mechanism leading to sootshell formation. The...
Microscopy of portland cement clinker and cementitous materials dates to the first petrographic microscope in the late 19th century. The development of the...
Svetlana A. Kotochigova, Eite Tiesinga, Paul S. Julienne
We investigate the effectiveness of creating polar ground state KRb molecules by two-color photoassociative spectroscopy. In this process the molecules are...
A distribution of particle sizes or particle size distribution (PSD) is a fundamental characteristic of cement powder. Accurate PSDs are required in...