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.
Dmitry D. Osin, Joseph Reader, John D. Gillaspy, Yuri Ralchenko
Extreme ultraviolet spectra of highly charged xenon atoms were produced with an electron beam ion trap (EBIT) at the National Institute of Standards and...
P J. Phillips, Alice J. O'Toole, Xiaobo An, Joseph Dunlop
The intended applications of automatic face recognition systems include venues that vary widely in demographic diversity. Formal evaluations of algorithms do...
Edward D. McCarthy, Mauro Zammarano, Douglas M. Fox, Ryan Nieuwendaal, Yeon S. Kim, P H. Maupin, Paul C. Trulove, Jeffrey W. Gilman
We report the formation of an ionomeric network in a poly(L,D-lactide) hybrid nanocomposite, (PLDLA-HYB) during in-situ melt polymerization of L,D lactide in...
K. Fritsch, Zahra Yamani, S. Chang, Yiming Qiu, John R. Copley, M. Ramazanoglu, H. A. Dabkowska, B. D. Gaulin
Co 3V 2O 8 is an orthorhombic magnet in which S=3/2} magnetic moments reside on two crystallographically inequivalent Co 2+ sites, which decorate a stacked...
Phllip M. Bentley, Shane J. Kennedy, Ken H. Andersen, Damian Martin Rodriguez, David F. Mildner
Modern, nonlinear ballistic neutron guides are an attractive concept in neutron beam delivery and instrumentation, because they offer increased performance over...
P J. Phillips, J. R. Beveridge, Bruce A. Draper, Geof H. Givens, Alice J. O'Toole, David Bolme, Joseph Dunlop, Yui M. Lui, Hassan A. Sahibzada, Samuel Weimer
The Good, the Bad, & the Ugly Face Challenge Problem was created to encourage the development of algorithms that are robust to recognition across changes that...
Sung Kim, Christopher L. Holloway, Michael D. Janezic, Kendra L. Kumley, James R. Baker-Jarvis, Edward Kuester
We present a rectangular S-band waveguide having electromagnetic bandgap properties (stopbands) controlled with sheets of metafilms composed of ceramic...
Daniel R. Sisan, Michael Halter, Joseph B. Hubbard, Anne L. Plant
In this paper, we develop a potential landscape approach to quantitatively describe experimental data from a fibroblast cell line that expresses GFP under the...
Yauheni Paulechka, Kenneth G. Kroenlein, Andrei F. Kazakov, Michael D. Frenkel
A systematic, formal approach to optimization of force filed parameters for molecular simulations is presented. The procedure is based on response surface...
Alkali activated slag shows considerable promise as an environmentally friendly alternative to binders produced from ordinary portland cement (OPC). The...
Walter J. Lafferty, Jean-Marie Flaud, A. Ben Hassen, F. K. Kwabia Tchana, X Landsheere, H Aroui
Fourteen Fourier transform spectra of ethylene (C2H4) have been recorded in the 1800-2350 spectral domain with different path-lengths and pressures and used to...
Recently surface states in negative gap structures made of semiconductors like HgTe, which appear due to the band structure inversion, have attracted renewed...
Christopher L. Soles, Hyun W. Ro, K. J. Alvine, Oleg Shpyrko, Yenling Dai, Alec Sandy, Suresh Narayanan
The surface dynamics of thin molten polystyrene films supported by nanoscale periodic silicon line-space gratings were investigated with X-ray photon...
Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Zoya Popovic
Passive digital backscatter signals in systems like radio frequency identification (RFID) are usually received along with strong interference from a leaked...
Azzam Mansour, Joshua B. Martin, Winnie Wong-Ng, George S. Nolas
X-ray absorption fine structure spectroscopy at the Ga and Ge K-edges was used to study changes in the Ga and Ge electronic structure and local coordination...
Robynne Kirkpatrick, Tony Masiello, Mathew A. Martin, Joseph W. Nibler, Arthur Maki, Alfons Weber, Thomas A. Blake
This paper is a continuation of earlier work for which the high resolution infrared spectrum of [1.1.1]propellane was measured and its k and l structure...
Stefan Kueck, Alan L. Migdall, Ivo P. Degiovanni, Jessica Cheung
This special issue accompanies the 5th international conference on single-photon technologies held at the Physikalisch-Technische Bundesanstalt (PTB), Germany...
Julien C. Gigault, Tae Joon Cho, Robert I. MacCuspie, Vincent A. Hackley
The application of asymmetrical-flow field flow fractionation (A4F) for gold nanorod (GNR) fractionation and characterization was comprehensively investigated...
Tian Zhong, Franco N. Wong, Alessandro Restelli, Joshua Bienfang
We demonstrate generation of high-purity photon pairs at 1560 nm in a single spatial mode from a periodically-poled KTiOPO4 (PPKTP)waveguide. With nearly...
Carbon nanotubes possess superior electrical and optical properties and hold great promise for electronic and biomedical applications1-10. The electronic...
Ward L. Johnson, Sudook A. Kim, Roy H. Geiss, Colm Flannery, Kristine A. Bertness, Paul R. Heyliger
Monocrystalline nanowires offer an attractive basis for resonant nanoelectromechanical systems (NEMS) for a variety of applications, including mass and force...
Tetsuya Tsuda, Susuma Kuwabata, Gery R. Stafford, Charles Hussey
The electrochemistry of Hf(IV) and the electrodeposition of Al-Hf alloys was examined in the Lewis acidic aluminum chloride-1-ethyl-3-methylimidazolium chloride...
Archita Hati, Craig W. Nelson, Corey A. Barnes, Danielle G. Lirette, Jason A. DeSalvo, David A. Howe
We designed ultra-low noise regenerative divider-by-2 circuits that operate at input frequencies of 20 MHz and 10 MHz. We achieved residual output-referred...
There are different ways of mathematically representing 3-D heterogeneous material structures. But for each of these methods, usually the desired end result is...
Kevin G. Brady, Ram D. Sriram, Bettijoyce B. Lide, Kathleen M. Roberts
According to a report by the Center for Medicare and Medicaid Services [CMS] (http://www.cms.gov), the United States spent nearly $2.6 trillion dollars on...
Winnie Wong-Ng, Azzam Mansour, Joshua Martin, George S. Nolas
XANES spectroscopy was successfully used to study changes in the density of unoccupied states for silicon substituted Ba8Ga16Ge30-xSix type I clathrates...
Justin M. Zook, Amy Gargis, Lisa Kalman, Ira Lubin
We would like to draw your readers attention to the Next-generation Sequencing: Standardization of Clinical Testing (Nex-StoCT) guidelines, which represent an...
Shinichiro Muramoto, Timothy M. Brewer, Matthew E. Staymates, John G. Gillen
The feasibility of a low temperature plasma (LTP) probe as a way to prepare polymer bevel cross-sections for secondary ion mass spectrometry (SIMS) applications...
Young J. Lee, Chad R. Snyder, Aaron M. Forster, Marcus T. Cicerone, Wen-Li Wu
Polyethylene (PE) is a ubiquitous material in our daily life appearing as milk bottles, toys and diapers. A lesser-known but increasingly important use of PE is...