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.
Winnie K. Wong-Ng, Guangyao Liu, Joshua B. Martin, Evan L. Thomas, Nathan Lowhorn, James A. Kaduk
Two low-dimensional cobaltite series in the Sr-Ca-Co-O system have been investigated for their solid solution limit, structure, and compatibility phase
Winnie K. Wong-Ng, X Shi, Joing Yang, S Bai, Jihui Yang, Hsin Wang, James Salvador, W Zhang, L Chen
We have developed a scheme for improving the thermoelectric properties of type I Ba8Ga16Ge30 clathrates by doping transition metals, TM, on the Ga sites. TM
Shuhui Kang, Wen-Li Wu, Kwang-Woo Choi, Vivek Prabhu, Anuja De Silva, Christopher K. Ober
A soft-contact film transfer method was developed to prepare multilayer photoresist thin films that enable high resolution spectroscopic and reflectivity
Critical flow venturis (CFVs) can be used to measure flow under transient pressure and flow conditions with uncertainties of 0.13 % or less (95 % confidence
This package implements a methodology for using cell volume distributions to estimate cell growth rates and division times that is described in the paper
Zachary H. Levine, Bruce R. Borchardt, Nolan J. Brandenburg, Charles W. Clark, Balasubramanian Muralikrishnan, Craig M. Shakarji, Joseph J. Chen, Eliot L. Siegel
(a) Purpose: We wanted to test the extent to which two common methods of determining the sizes of tumors would perform when compared to a statistically
Christopher L. Holloway, E Genender, Catherine A. Remley, John M. Ladbury, Galen H. Koepke
We illustrate use of the reverberation chamber to simulate different wireless propagation environments including effects such as narrowband or frequency
Lee L. Yu, Michael Epstein, David Hendin, Nathan Bower
ICP-MS and XRF analyses were conducted on Judean coins from the first century BCE and CE in order to determine the efficacy and limits of these methods for
A series of 24 full-scale experiments was conducted to examine the effects of alarm type (photoelectric, ionization, and dual sensor), alarm location, fabric
C. Iliadis, R Longland, A E. Champagne, A. Coc, Ryan P. Fitzgerald
Numerical values of charged-particle thermonuclear reaction rates for nuclei in the A=14-40 region are tabulated. The results are obtained using a method, based
Emil Simiu, Girma Bitsuamlak, Arindam Chowdury, Ruilong Li, Amanuel Tecle, Dong Hun Yeo
Aerodynamic testing of low-rise structures is fraught with difficulties that can be the cause of large measurement errors resulting in the underestimation of
NO3 has been stabilized in a neon matrix at 4.3 K in sufficient yield for detection of the absorptions between 7000 and 10000 cm-1 which arise from vibronically
Benjamin Ueland, Jeffrey W. Lynn, Mark Laver, Y. J. Choi, S.-W. Cheong
We have performed polarized and unpolarized small angle neutron scattering experiments on single crystals of HoMnO 3 and have found that an increase in magnetic
T. A. Palomaki, S. K. Dutta, R M. Lewis, A J. Przybysz, B. K. Cooper, H. Kwon, J. R. Anderson, C. J. Lobb, F. C. Wellstood, Eite Tiesinga
We report spectroscopic measurements of discrete two-level systems (TLSs) coupled to a dc SQUID phase qubit with a 16 μm2 area Al/AlOx/Al junction. Applying
Huaning Zhu, Nicos Martys, Chiara C. Ferraris, Daniel De Kee
A vane rheometer is commonly used to determine the rheological properties of suspensions, colloids such as cement-based materials, many of which can be
This paper addresses the durability of natural teeth from a materials perspective. Teeth are depicted as 'smart' biocomposites, highly resistant to cumulative
The stress during Pb underpotential deposition (upd) on (111)-textured Au has been examined on a cantilever beam electrode in perchloric acid supporting
Jason Hattrick-Simpers, Chun Chiu, James E. Maslar, Leonid A. Bendersky, Michael E. Niemann, Sesha S. Srinivasan, Elias K. Stefanakos
In situ Raman spectroscopy was used to monitor the dehydrogenation of ball-milled mixtures of LiNH2 LiBH4 MgH2 nanoparticles. The as-milled powders were found
Christopher L. Holloway, William F. Young, Galen H. Koepke, Dennis G. Camell, Catherine A. Remley
In this paper, we report on our investigation into radio communications problems faced by emergency responders in disaster situations. A fundamental challenge
Catherine A. Remley, Galen H. Koepke, Christopher L. Holloway, Chriss A. Grosvenor, Dennis G. Camell, John M. Ladbury, Robert T. Johnk, William F. Young
We report on measurements that characterize multipath conditions that affect broadband wireless communications in building penetration scenarios. Measurements
Quantum information systems are commonly operated in conventional communication bands (1310 and 1550 nm) over an optical fiber to take advantage of low
Winnie K. Wong-Ng, Stevce Stefanoski, James A. Kaduk, Qingzhen Huang, Clifford R. Bowers, George S. Nolas, Beekman Mathew
Structural analyses as well as low temperature thermal conductivity is reported for the new phase in the Na-Ge system, Na1-xGe3+z. Specimens were characterized
Stephen R. Decker, Robert N. Goldberg, Brian Lang, William Michener
Microcalorimetry, high-performance liquid chromatography (HPLC), and liquid chromatography-mass spectrometry (LC-MS) have been used to conduct a thermodynamic
Sarah E. Henrickson, Edmund A. DiMarzio, Qian Wang, Vincent M. Stanford, John J. Kasianowicz
It has been shown that individual molecules of single stranded DNA can be driven electrophoretically through a single Staphylococcus aureus ?-hemolysin ion
The primary fuel used within the general aviation industry is a petroleum based gasoline blended with small amounts of tetraethyl lead (a lead-based additive
M Kim, Seok H. Yoon, Piotr A. Domanski, William V. Payne
Development of a reference model to predict the value of system parameters during fault free operation is a basic step for fault detection and diagnosis (FDD)
Edward B. Flagg, Andreas Muller, Sergey V. Polyakov, Alexander E. Ling, Glenn S. Solomon
We demonstrate and characterize interference between discrete photons emitted by two separate semiconductor quantum dot states in different samples excited by a
Christopher W. Meyer, Joseph T. Hodges, Gregory E. Scace, James R. Whetstone, R W. Hyland
A second-generation primary hygrometer has been completed at the National Institute of Standards and Technology (NIST). A gravimetric hygrometer measures
This publication discusses, at a high level, the ubiquitous threats facing email systems today and impresses the need to secure these systems. This article will