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.
Arthur H. Fanney, Mark W. Davis, Brian P. Dougherty, D L. King, W E. Boyson, J A. Kratochvil
Computer simulation tools used to predict the energy production of photovoltaic systems are needed in order to make informed economic decisions. These tools...
J M. Hollis, Francis J. Lovas, A Remijan, P R. Jewell, Vadim V. Ilyushin, I Kleiner
Acetamide (CH3CONH2) has been detected in emission and absorption toward the star-forming region Sagittarius B2(N) with the 100-m Green Bank Telescope (GBT) by...
R Dumke, M Johanning, Eduardo Gomez, J D. Weinstein, Kevin Jones, Paul D. Lett
We demonsatrate an all optical technique to evaporatively produce sodium Bose-Einsteincondensates (BEC). We use a crossed-dipole trap formed from light near 1 $...
Donna C. Hurley, Roy H. Geiss, N Jennett, Malgorzata Kopycinska-Mueller, A Maxwell, Jens Mueller, David T. Read, J Wright
As length scales continue to shrink, new tools are needed to measure mechanical properties. We are developing two such tools using different nondestructive...
The development of short pulsed lasers has progressed steadily over the past 30 years. In the search for better techniques and materials to generate shorter and...
A review article that briefly summarizes the various types of radio controlled wristwatches and the technology behind them. It includes a short description of...
The rediscovery of Mendel's laws a century ago launched the science that William Bateson called "genetics," and led to a new view of evolution combining...
This paper presents a feedback control scheme for transmission of video signals over mobile ad-hoc channels. The scheme is a combination of cross-layer (local)...
Gerald L. Vogel, David Shim, Gary E. Schumacher, Clifton M. Carey, Laurence C. Chow, Shozo Takagi
Fluoride (F) in oral fluids, which appears to be primarily responsible for the cariostatic effect of this ion, appears to be maintained by the release of...
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Qian Dong, Kenneth N. Marsh, John H. Dymond, William A. Wakeham, Stephen E. Stein, Erich Koenigsberger, Anthony R. Goodwin
ThermoML is an XML-based emerging IUPAC standard for storage and exchange of experimental, predicted, and critically evaluated thermophysical and thermochemical...
Sei-Hyung Ryu, Sumi Krishnaswami, Hull Brett, James Richmond, Anant Agarwal, Allen R. Hefner Jr.
In this paper, we report 4H-SiC power DMOSFETs capable of blocking 10 kV. The devices were scaled up to 5 A, which is a factor of 25 increase in device area...
National Institute of Standards and Technology, Gaithersburg, MD 20899, USA ABSTRACT: As manufacturing and commerce become ever more global in nature, companies...
Industries that process and use metals, from microelectronics to aerospace, can use phase equilibria data for complex alloys (three or more components) and...
A new matrix-free algorithm for the solution of linear inequality constrained, large-scale trust-region sub-problems is presented. The matrix-free nature of the...
A Remijan, J M. Hollis, Lewis E. Snyder, P R. Jewell, Francis J. Lovas
We report the detection of a new interstellar methylpolyyne, CH3C6H (methyltriacetylene) with the 100-m Green Bank Telescope (GBT). Ten spectral lines of this...
Ray Radebaugh, Michael A. Lewis, Ercang Lou, John M. Pfotenhauer, G. F. Nellis, L. F. Schunk
The efficiency of regenerative refrigerators is generally maximized when the pressure and flow are in phase near the midpoint of the regenerator. Such a phase...
The size of Stirling and Stirling-type pulse tube cryocoolers is dominated by the size of the pressure oscillator. Such cryocoolers typically operate at...
Magnetic metallic glasses, having large magnetic moments and high Curie Temperatures (TC), have not been widely studied as magnetic refrigerants. In this study...
Robert D. Shull, Virgil Provenzano, Alexander J. Shapiro, A Fu, M W. Lufaso, E Karapetrova, G Kletetschka, V Mikula
It was shown that adding one atomic percent Fe to Gd5Ge2Si2 greatly reduced its large hysteresis losses, broadened the magnetic entropy change, ?Sm, versus...
Our recent research on amorphous calcium phosphate (ACP) dental materials has resulted in biocompatible composites with high remineralizing ability and moderate...
William Regnault, Tonya Icenogle, Joseph M. Antonucci, Da-Wei Liu, Drago Skrtic
In this study, the effects of two comonomers (the low molecular mass, hydrophilic 2-hydroxyethyl methacrylate (HEMA) vs. the high molecular mass, less...
Calcium phosphate cement (CPC) can conform to complex cavity shapes and set in situ to form bioresorbable hydroxyapatite. The aim of this study was to introduce...