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Displaying 26251 - 26275 of 73970

On-Board Signal Integrity for GPS

September 21, 2010
Author(s)
Marc A. Weiss, Pradipta Shome, Ron Beard
The elements of a space-based integrity approach are to monitor the signals on-board the satellite, such that signal performance can be maintained well within desired integrity limits. These elements include 1) a system for monitoring multiple atomic

CMSD: A Model Supporting Manufacturing and Simulation Application Integration

September 20, 2010
Author(s)
Frank H. Riddick, Yung-Tsun T. Lee
Standard representations for key manufacturing entities could help reduce the costs associated with simulation model construction and data exchange between simulation and other software applications. This change would make the use of simulation technology

lSPR Study of DNA Wrapped Single Wall Carbon Nanotube (ssDNA-SWCNT) Adsorption on a Model Biological (Collagen) Substrate

September 20, 2010
Author(s)
Jung Jin Park, Jeffrey Fagan, JiYeon Huh, Kalman D. Migler, Alamgir Karim, Dharmaraj Raghavan
The kinetics of single stranded-DNA dispersed single wall carbon nanotubes (SWCNTs) adsorption onto an immobilized collagen layer in a microfluidic channel was probed using surface plasmon resonance (SPR) imaging. The adsorption was measured for a range of

Reliability Issues of SiC MOSFETs: A Technology for High Temperature Environments

September 20, 2010
Author(s)
Liangchun (. Yu, Greg Dunne, Kevin Matocha, Kin P. Cheung, John S. Suehle, Kuang Sheng
The wide-bandgap nature of silicon carbide (SiC) makes it an excellent candidate for applications where high temperature is required. The MOS-controlled power devices are the most favorable structure, however, it is widely believed that silicon oxide on

Advances in Modeling of Scanning Charged-Particle-Microscopy Images

September 19, 2010
Author(s)
Petr Cizmar, Andras Vladar, Michael T. Postek
Modeling scanning electron microscope (SEM) and scanning ion microscope images has recently become necessary, because of its ability to provide repeatable images with a priori determined parameters. Modeled artificial images have been used in evaluation of

Predicting Microstructure Development During Casting of Drug Eluting Coatings

September 19, 2010
Author(s)
David M. Saylor, Jonathan E. Guyer, Daniel Wheeler, James A. Warren
We have devised a novel diffuse interface formulation to model the development of chem- ical and physical inhomogeneities, i.e. microstructure, during the process of casting drug eluting coatings. These inhomogeneities, which depend on the coating

Current induced torques in the presence of spin-orbit coupling

September 17, 2010
Author(s)
Paul M. Haney, Mark D. Stiles
In systems with strong spin-orbit coupling, the relationship between spin-transfer torque and the divergence of the spin current is generalized to a relation between spin transfer torques, total angular momentum current, and mechanical torques. In

The Cooper Pair Transistor

September 17, 2010
Author(s)
Jose A. Aumentado
The Cooper pair transistor (CPT) is a superconducting electrometer that has applications in quantum information as well as fundamental superconductivity studies. Since it operates in a near-dissipationless mode, it has potential as a minimally invasive

A Statistical Test Suite for Random and Pseudorandom Number Generators for Cryptographic Applications

September 16, 2010
Author(s)
Lawrence E. Bassham, Andrew L. Rukhin, Juan Soto, James R. Nechvatal, Miles E. Smid, Stefan D. Leigh, M Levenson, M Vangel, Nathanael A. Heckert, D L. Banks
This paper discusses some aspects of selecting and testing random and pseudorandom number generators. The outputs of such generators may be used in many cryptographic applications, such as the generation of key material. Generators suitable for use in

Photoresist latent and developer images as probed by neutron reflectivity methods

September 16, 2010
Author(s)
Vivek M. Prabhu, Shuhui Kang, David L. VanderHart, Eric K. Lin, Wen-Li Wu
Photoresist materials enable the fabrication of advanced integrated circuits with ever decreasing feature sizes. As next-generation light sources are developed, using extreme ultraviolet light of wavelength 13.5 nm, these highly-tuned formulations must

Stability and Surface Topography Evolution in Nanoimprinted Polymer Patterns under a Thermal Gradient

September 16, 2010
Author(s)
Christopher Soles, Yifu Ding, H. Jerry Qi, Kyle J. Alvine, Hyun W. Ro, Dae Up Ahn, Jack Douglas, Sheng Lin-Gibson
Nanostructures created in polymer films by nanoimprint lithography are subject to large stresses, both those from the imprinting processes as well as stresses arising from the intrinsic thermodynamic instabilities. These stresses can induce nanostructure

Thermochemistry of Imidazolium-Based Ionic Liquids:Experiment and First-Principles Calculations

September 16, 2010
Author(s)
Chris D. Muzny, Sergey P. Verevkin, Vladimir N. Emel'yanenko, Dzmitry H. Zaitsau, Andreas Heintz, Michael D. Frenkel
In this work the molar enthalpy of formation of the ionic liquid ethyl-methylimidazolium dicyanoamide in the gaseous phase [C2MIM][N(CN)2] was measured by means of combustion calorimetry and enthalpy of vaporization using transpiration. Available scarce

Vacancy-Hydrogen Defects in Aluminum Formed During Aqueous Dissolution

September 16, 2010
Author(s)
K. R. Hebert, J. Ai, Gery R. Stafford, K. M. Ho, C. Z. Wang
Aqueous dissolution of aluminum is accompanied by extensive absorption of hydrogen, along with formation of hydride and voids. We used in situ stress measurements to discriminate between absorption mechanisms leading to either interstitial or vacancy

Applicability of Nonlinear Multiple-Degree-of-Freedom Modeling for Design

September 15, 2010
Author(s)
Michael Valley, Mark Aschheim, Craig Comartin, William Holmes, Helmut Krawinkler, Mark Sinclair
In 2008, NIST initiated Task Order 68241 entitled "Improved Nonlinear Static Seismic Analysis Procedures – Multiple-Degree-of-Freedom Modeling." The purpose of this project was to conduct further studies on multiple-degree-of-freedom effects as outlined in

Growth of Planar Arrays of One-dimensional p-n Heterojunctions

September 15, 2010
Author(s)
Babak Nikoobakht, Andrew A. Herzing
We report a general method for /in-situ/ formation and hierarchical assembly of nanowire-based semiconductor heterojunctions that are electrically addressable. Heterojunctions are formed by lateral epitaxial growth of nanowires/nanowalls on a semiconductor

Measurement Uncertainties in Speaker Recognition Evaluation

September 15, 2010
Author(s)
Jin Chu Wu, Alvin F. Martin, Craig S. Greenberg, Raghu N. Kacker
The speaker recognition evaluation is an ongoing series of evaluations conducted by NIST. A detection cost function is computed over the sequence of trials provided and used for all speaker detection tests while measuring speaker detection performance. The

Modelling Type Ia Supernova Light Curves

September 15, 2010
Author(s)
Bert W. Rust, Dianne M. O'Leary, Katharine M. Mullen
Type Ia supernova light curves are characterized by a rapid rise from zero luminosity to a peak value, followed by a slower quasi-exponential decline. The rise and peak last for a few days, while the decline persists for many months. It is widely believed
Displaying 26251 - 26275 of 73970
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