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.

Conferences

Quantitative Characterization of Fly Ash Reactivity for use in Geopolymer Cements

June 15, 2011

Author(s)

Paul E. Stutzman

The ability to characterize the reactivity of fly ashes is an essential part of making use of this aluminosilicate-rich waste product in geopolymer binders...

Statistical analysis of fiber gripping effects on Kolsky bar test

June 14, 2011

Author(s)

Jae Hyun Kim, Nathanael A. Heckert, Stefan D. Leigh, Haruki Kobayashi, Walter G. McDonough, Richard L. Rhorer, Kirk D. Rice, Gale A. Holmes

Preliminary data for testing fibers at high strain rates using the Kolsky bar test by Ming Cheng et al. 1 indicated minimal effect of strain rate on the tensile...

Experiments with Linear Compressors for Phase Shifting in Pulse Tube Cryocoolers

June 13, 2011

Author(s)

Michael A. Lewis, Peter E. Bradley, Ray Radebaugh

For the past year NIST has been investigating the use of mechanical phase shifters as warm expanders for pulse tube cryocoolers. Unlike inertance tubes, which...

Temperature instability comparison of micro- and mesoscale Joule-Thomson cryocoolers employing mixed refrigerants

June 13, 2011

Author(s)

Peter E. Bradley, Ray Radebaugh, Ryan J. Lewis, Mu Hong Lin, Yung-Cheng Lee

Previously we demonstrated cryogenic cooling in a Joule-Thomson microcryocooler (MCC) with mixed refrigerants operating at pressure ratios of 16:1 that achieved...

Division Polynomials for Jacobi Quartic Curves

June 13, 2011

Author(s)

Dustin Moody

In this paper we fi nd division polynomials for Jacobi quartics. These curves are an alternate model for elliptic curves to the more common Weierstrass equation...

Pulsed terahertz bi-directional reflection distribution function (BRDF) measurements of materials and obscurants

June 13, 2011

Author(s)

Shu Z. Lo, David R. Novotny, Erich N. Grossman, Edwin J. Heilweil

A pulsed terahertz imaging system modified to perform angular detection of light for quantitatively characterizing reflection and scattering from samples is...

Measuring the Impact of Engineering Research Publications

June 12, 2011

Author(s)

Stacy M. Bruss, Susan L. Makar

The Information Services Office (ISO) of the National Institute of Standards and Technology (NIST) recently conducted a study to assess the publishing impacts...

Modeling the Effects of Outdoor Use of Portable Gasoline Powered Generator Exhaust on Indoor Carbon Monoxide Exposure

June 10, 2011

Author(s)

Steven J. Emmerich, Leon Wang

The U.S. Centers for Disease Control and Prevention (CDC) has reported that up to half of non-fatal CO poisoning incidents during the hurricane seasons in 2004...

Examination of United States Carbon Dioxide Emission Databases

June 10, 2011

Author(s)

Robert P. Borthwick, James Whetstone, Jiann C. Yang, Antonio Possolo

This paper compared carbon dioxide emissions from plants obtained in two ways, first from the US Department of Energy, Energy Information Administration EIA-767...

QUANTIFICATION OF A PRECISION POINT SOURCE FOR GENERATING CARBON DIOXIDE EMISSIONS

June 10, 2011

Author(s)

Robert P. Borthwick, Matthew Bundy

This study provides an analysis of the uncertainty of carbon dioxide (CO2) emissions from an 8 MW natural gas burner. A precise and accurate point source for...

Successful Design of Biometric Tests in a Constrained Environment

June 9, 2011

Author(s)

Vladimir N. Dvornychenko

The National Institute of Standards and Technology (NIST), with participation of the biometrics community, conducts evaluations of biometrics-based verification...

Comparison of absolute measurements of laser power using next generation NIST high power radiometer and Air Force high power calorimeter

June 8, 2011

Author(s)

Marla L. Dowell, Christopher L. Cromer, Xiaoyu X. Li, John Bagford, Dan Seibert, John Eric, David Cooper, Steven Comisford, Ernie Cromwell, Richard Bowling

We report comparisons of laser power measurements between the new NIST radiometer, also known as the BB Prime, and the current Air Force standards, known as the...

Analytical and Experimental Assessment of Steel Truss Bridge Gusset Plate Connections

June 8, 2011

Author(s)

Mark A. Iadicola, Yavuz Mentes, Yoon D. Kim, Robert S. Zobel, Donald W. White, Roberto T. Leon, Justin M. Ocel

This paper focuses on findings from comprehensive studies of steel truss bridge gusset plate behavior and proposes practical design procedures. The studies...

Traceable Calibration of a Critical Dimension Atomic Force Microscope

June 6, 2011

Author(s)

Ronald G. Dixson, Ndubuisi G. Orji, Craig D. McGray, Jon C. Geist

The National Institute of Standards and Technology (NIST) has a multifaceted program in atomic force microscope (AFM) dimensional metrology. One component of...

Five Grand Challenges in Pedestrian and Evacuation Dynamics

June 6, 2011

Author(s)

Jason D. Averill

This paper identifies five grand challenges in the multidisciplinary field of pedestrian and evacuation dynamics (PED). In order to maximize the ef-fectiveness...

Modeling and DIC Measurements of Dynamic Compression Tests of a Soft Tissue Simulant

June 6, 2011

Author(s)

Steven P. Mates, Aaron M. Forster, R Rhorer, Amit Bagchi, Richard Everett, Kirth Simmonds

Stereoscopic digital image correlation (DIC) is used to measure the shape evolution of a soft, transparent thermoplastic material subject to a high strain rate...

Throughput and Delay Analysis of Half-Duplex IEEE 802.11 Mesh Networks

June 6, 2011

Author(s)

Camillo A. Gentile

Emerging technologies for mesh networks can provide users with last-mile service to an access point by forwarding data through wireless relays instead of...

Ant-Colony Based Near-ML Block Decoder in Asynchronous Cooperative MIMO Systems Using a Linear Dispersion Structure

June 5, 2011

Author(s)

Hamid Gharavi, Chong Xu

The linear dispersion structure is employed to accommodate the dynamic topology of cooperative networks, as well as to achieve higher throughput than...

CAVITY OPTOMECHANICAL SENSORS

June 5, 2011

Author(s)

Houxun H. Miao, Kartik A. Srinivasan, Matthew T. Rakher, Marcelo I. Davanco, Vladimir A. Aksyuk

We report a novel type of fully integrated optomechanical sensor and demonstrate high sensitivity mechanical displacement measurements on chip. We sense the...

Ultrafine Particles: 3 Years of Measurements in the NIST Test House

June 5, 2011

Author(s)

Lance L. Wallace, Andrew K. Persily, Steven J. Emmerich, Dong H. Rim, Chi P. Hoang, Cynthia H. Reed, Wang Fang, M E. Greene, Jung I. Choi

NIST has supported research characterizing ultrafine particle sources and dynamics for more than a decade. Over 90 % of ultrafine particles (UFP) produced by...

Modelling Dynamic Aerosol Processes for Indoor Ultrafine Particles

June 5, 2011

Author(s)

Dong H. Rim, Lance L. Wallace, Andrew K. Persily, Jung I. Choi

This study has investigated aerosol transformation processes for four common sources of indoor ultrafine particles (UFP): gas stove, electric stove, candle, and...

Volatile Organic Compound Concentrations and Estimation of Optimal Source Strengths to Achieve a High Level of Acceptance Indoors using Multi- Zone Simulation

June 5, 2011

Author(s)

Helena Jarnstrom, William Stuart Dols, Cynthia H. Reed, Andrew K. Persily

This study investigated the possibility of identifying chemical pollutant profiles and concentration levels that result in a high level of acceptance indoors...

Airflow and Indoor Air Quality Analyses Capabilities of Energy Simulation Software

June 5, 2011

Author(s)

Lisa Ng, Andrew K. Persily

A wide range of tools are used to design and analyze the energy implications of different ventilation and space conditioning strategies to reduce building...

Numerical test of few-qubit clock protocols

June 3, 2011

Author(s)

Till P. Rosenband

The stability of several clock protocols based on 2 to 20 entangled atoms is evaluated numerically, by a simulation that includes the effect of decoherence due...

Selective Pixel Interpolation for Spatial Error Concealment

June 1, 2011

Author(s)

Hamid Gharavi, Yi Ge, Bo Yan, Kairan Sun

This paper proposes an effective algorithm for spatial error concealment with accurate edge detection and partitioning interpolation. Firstly, a new method is...

A Physics-Based Simple Series Resistance Extraction Methodology

June 1, 2011

Author(s)

Kin P. Cheung, Jason P. Campbell

Series resistance has become a serious obstacle encountered in the development of advanced CMOS devices. At the same time, series resistance quantification in...

Linear Dispersion Codes for Asynchronous Cooperative MIMO Systems

June 1, 2011

Author(s)

Hamid Gharavi

In this treatise, we propose a novel family of Asynchronous Cooperative Linear Dispersion Codes (ACLDCs), which is capable of maintaining full diversity in...

Self-Deployment Algorithms for Field Coverage in a Network of Nonidentical Mobile Sensors

June 1, 2011

Author(s)

Kamran Sayrafian

In this paper, efficient deployment algorithms are proposed for a mobile sensor network to improve coverage. The proposed algorithms calculate the position of...

High-Resolution Passive Video-Rate Imaging at 350 GHz

May 26, 2011

Author(s)

Daniel T. Becker

We are developing a 350 GHz cryogenic passive video imaging system for use in standoff security applications. This demonstration system uses 800 photon-noise...

A Traceable Scatterometry Measurement of a Silicon Line Grating

May 26, 2011

Author(s)

Thomas A. Germer, Heather J. Patrick, Ronald G. Dixson

In this paper, we present a spectroscopic Mueller matrix ellipsometry measurement of a silicon line grating with nominal pitch of 600 nm and line width 100 nm...

Was this page helpful?