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.
Lawrence T. Hudson, John F. Seely, Jack L. Glover, Yuri Ralchenko, Nino R. Pereira, Uri Feldman
The tungsten Lγ transitions between 11 keV and 12 keV and Kα transitions from 57 keV to 60 keV were produced by a laboratory electron-bombarded x-ray source and...
Lamuel David, Ari Feldman, Elisabeth Mansfield, John H. Lehman, Gurpreet Singh
Carbon nanotubes and graphene are known to exhibit some exceptional thermal (K2000 to 4400 W.m-1K-1at 300K) and optical properties. Here, we demonstrate...
Kurt D. Benkstein, Phillip H. Rogers, Christopher B. Montgomery, Jerry Jin, Baranidharan Raman, Stephen Semancik
The capabilities of a chemiresistive microsensor array for detecting and identifying four trace target analytes were examined under a simulated Martian...
The hp version of the finite element method (hp-FEM) combined with adaptive mesh refinement is a particularly efficient method for solving partial differential...
Christopher C. Bohn, Amit K. Agrawal, Youngmin Lee, Charles J. Choi, Matthew Davis, Paul M. Haney, Henri J. Lezec, Veronika A. Szalai
Surface plasmon polaritons have attracted attention for energy applications such as photovoltaic and photoelectrochemical cells because of their ability to...
Jacob M. Taylor, Tolga Bagci, A Simonsen, Silvan Schmid, L Villanueva, Emil Zeuthen, Anders Sorensen, Koji Usami, A Schliesser, E.S. Polzik
Low-loss transmission and sensitive recovery of weak radio-frequency (rf) and mi- crowave signals is an ubiquitous technological challenge, crucial in fields as...
John H. Scott, Konrad Rykaczewski, Adam T. Paxson, Matthew E. Staymates, Marlon L. Walker, Xiaoda Sun, Sushant Anand, Siddarth Srinivasan, Gareth H. McKinley, Jeff Chinn, Kripa Varanasi
Compared to the significant body of work devoted to surface engineering for promoting dropwise condensation heat transfer of steam, much less attention has been...
Haena Yim, Woo Yeon Kong, Seok-JIn Yoon, Sahn Nahm, Ho Won Jang, Yung-Eun Sung, Jong Y. Ha, Albert Davydov, Ji-Won Choi
Three-dimensional (3D) high surface area LiSn_(0.0125)Mn_(1.975)O-(4) thin film cathodes have been fabricated in order to increase a charge/discharge capacity...
Alexana Roshko, Roy H. Geiss, John B. Schlager, Matthew D. Brubaker, Kristine A. Bertness, Norman A. Sanford, Todd E. Harvey
Catalyst-free GaN nanowires with InGaN quantum disks (QDs) were characterized by scanning/transmission elec-tron microscopy (S/TEM) and photoluminescence. A va...
Elizabeth S. Drexler, Joseph D. McColskey, Marc Dvorak, Neha N. Rustagi, Damian S. Lauria, Andrew J. Slifka
Testing the fatigue crack growth of materials at low frequencies has been a tug-of-war between the investment of time and starting at high values of the stress...
Wei Yu, David W. Griffith, Linqiang Ge, Sulabh Bhattarai, Nada T. Golmie
The smart grid is a new type of power grid that will use the advanced communication network technologies to support more efficient energy transmission and...
Victor H. Vartanian, Richard A. Allen, Larry Smith, Klaus Hummler, Steve Olson, Brian Sapp
This paper focuses on the metrology needs and challenges of through silicon via (TSV) fabrication, consisting of TSV etch, liner, barrier, and seed (L/B/S)...
The fact that the unit of mass might soon be derived from the Planck constant, rather than from an artifact standard, can seem daunting and downright baffling...
The performance of a residential split heat pump in the cooling mode operating under nine faults was described using normalized performance parameters...
We present a theoretical investigation of optical self-focusing effects in light scattering with condensates. Using long (>200 μs), red-detuned pulses we show...
Erica D. Kuligowski, Richard Peacock, Bryan Hoskins, Emily Wiess
The time that it takes a population to reach safety when descending a stairwell during building evacuations is typically described by measureable engineering...
Search engines help users locate particular information within large stores of content developed for human consumption. For example, users expect web search...
Sung Kim, Michael D. Janezic, James R. Baker-Jarvis
We present a simple and straightforward approximate approach to removing resonant artifacts that arise in the material parameters extracted near half-wavelength...
Dylan F. Williams, Phillip Corson, Sharma Jahnavi, Krishnaswamy Harish, Wei Tai, George Zacharias, Ricketts David, Watson Paul, Dacquay Eric, Voinigescu Sorin
This paper compares on-wafer thru-reflect-line (TRL) and off-wafer short-open-load-thru (SOLT) and line-reflect-reflect-match (LRRM) vector-network-analyzer...
Rick L. Paul, William C. Davis, Karen E. Murphy, Colleen E. Bryan Sallee, Lee L. Yu, William F. Guthrie, Dennis D. Leber, Thomas W. Vetter
A newly developed procedure for determination of arsenic by radiochemical neutron activation analysis was used to measure arsenic in SRM 955c Toxic Elements in...
Step by step time-marching schemes are fundamental tools in the numerical exploration of well-posed nonlinear evolutionary partial differential equations...
Randolph E. Elmquist, George R. Jones, Felipe L. Hernandez-Marquez, Marcos Bierzychudek
We describe a cryogenic two-terminal high-resistance bridge and its application in precision resistance scaling from the quantized Hall resistance (QHR) at RH =...
Kathryn M. Butler, Alexander H. Cheng, Christopher Mullen, Ahmed Al-Ostaz
Applying a polymeric coating on steel members has been demonstrated to be an effective countermeasure for the threat of blast on building and other structures...
Dongbo Wang, Jing (. Ye, Steven Hudson, Keana Scott, Sheng Lin-Gibson
Recent insights into bone formation have suggested that the critical first step to the biomineralization process is the integration of small (nanometer...
Wireless sensor networks (WSNs) have enabled numerous embedded wireless applications in different areas such as military/battlefield, environmental monitoring...
Jingyu Liu, Karen E. Murphy, Robert I. MacCuspie, Michael R. Winchester
The increasing application of engineered nanomaterials in consumer and medical products has motivated the development of single particle inductively coupled...
Shmuel Barzilai, Francesca M. Tavazza, Lyle E. Levine
Gold nanowire (NW) chains are considered a good candidate for nanoelectronics devices because they exhibit remarkable structural and electrical properties. One...
Roger V. Bostelman, Jochen Teizer, Soumitry J. Ray, Mike Agronin, Dominic Albanese
Poor visibility of powered industrial vehicles, such as forklifts, used in industry is often the cause of accidents that include pedestrians. Current standards...