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Search Publications

NIST Authors in Bold

Displaying 28601 - 28625 of 73929

PicoWatt Infrared Power Measurement using an Absolute Cryogenic Radiometer

May 7, 2009
Author(s)
Stephen Carr, Solomon I. Woods, Timothy M. Jung, Adriaan C. Carter, Raju V. Datla
We report on initial measurements of the low-temperature thermal properties of a device that is similar to the experimental apparatus used for absolute cryogenic radiometry (ACR) within the Low Background Infrared Radiometry (LBIR) facility at NIST. The

Sensor Alert Web Service for IEEE 1451-Based Sensor Networks

May 7, 2009
Author(s)
Kang B. Lee, Yuyin Song
This paper describes the Sensor Alert Web Service (SAWS) for the Institute of Electrical and Electronics Engineers (IEEE) 1451-based sensor networks developed at the National Institute of Standards and Technology (NIST). The SAWS consists of the Sensor

Mobile Device Forensics - Tool Testing

May 6, 2009
Author(s)
Richard Ayers
The goal of the Computer Forensic Tool Testing (CFTT) project at the National Institute of Standards and Technology (NIST) is to establish a methodology for testing computer forensic software tools. The results provide information necessary for toolmakers

Report of Findings: Use of Language in Ballot Instructions

May 6, 2009
Author(s)
Janice G. Redish, Dana Chisnell, Ethan Newby, Sharon J. Laskowski, Svetlana Z. Lowry
In this study, we compared two ballots that differed only in wording and presentation of the language on the ballots. For Ballot A, we used conventional wording and presentation, taken from typical ballots. For Ballot B, we used plain language wording and

Testing and Analysis of Steel Beam-Column Assemblies under Column Removal Scenarios

May 6, 2009
Author(s)
Fahim Sadek, Joseph A. Main, Hai S. Lew, Stephen D. Robert, Vincent Chiarito
This paper presents an experimental and analytical assessment of the performance of steel beam-column assemblies with two types of moment-resisting connections under vertical displacement of a center column, simulating a column removal scenario. The

Weighted Means Statistics in Interlaboratory Studies

May 6, 2009
Author(s)
Andrew L. Rukhin
The usefulness of weighted means statistics as a consensus mean estimator in collaborative studies is discussed. A random effects model designed to combine information from several sourcesis employed to justify their appeal to metrologists. Some methods of

On the determination of C0 (or A0), D0K, H0K, and some dark states for symmetric-top molecules from infrared spectra without the need for localized perturbations

May 4, 2009
Author(s)
Alfons Weber, Jintao Zhang, Tony Masiello, Thomas A. Blake, J Nibler
For symmetric top molecules, the normal k = 0, l = 0 and k = 1, l = 1 selection rules for parallel and perpendicular bands, respectively, do not allow the determination of the K-dependent rotational constants, C0 (or A0), D0K, and H0K. However, we

OntoSTEP: OWL-DL Ontology for STEP

May 4, 2009
Author(s)
Sylvere Krima, Raphael Barbau, Xenia Fiorentini, Sudarsan Rachuri, Ram D. Sriram
The Standard for the Exchange of Product model data (STEP) [1] contains product information mainly related to geometry. The modeling language used to develop this standard, EXPRESS, does not have logical formalism that will enable rigorous semantics. In

Phonon softening and anomalous mode near the x c = 0.5 quantum critical point inCa 2-x Sr x RuO 4

May 4, 2009
Author(s)
R. G. Moore, M. D. Lumsden, M. B. Stone, Jiandi Zhang, Ying Chen, Jeffrey Lynn, R. Jin, D Mandrus, E. W. Plummer
Inelastic neutron scattering is used to measure the temperature-dependent phonon dispersion in Ca2−xSrxRuO4(x=0.4,0.6). The in-plane Σ4 octahedral tilt mode softens significantly at the zone boundary of the high-temperature tetragonal (HTT) I41/acd

Calculation of Relative Thermal Elongation of Structural Steels

May 2, 2009
Author(s)
Dilip K. Banerjee, Ursula R. Kattner
In the recent past, there has been a number of studies toward predicting the thermal and structural behavior of components subjected to elevated temperature due to an exposure to fire. Numerical modeling has been applied quite extensively toward this end

Projector flux from color primaries

May 2, 2009
Author(s)
Edward F. Kelley
A standard methodology exists for estimating the flux from front projection displays by sampling the projected illuminance of a white source signal. With the advent and use of white projection primaries, a dramatic increase in flux can be achieved over the

Quantum radiometry

May 2, 2009
Author(s)
Sergey V. Polyakov, Alan L. Migdall
We review radiometric techniques that take advantage of photon counting and stem from the quantum laws of nature. We present a brief history of metrological experiments and review the current state of experimental quantum radiometry.

Calibration of Speed Enforcement Down-the-Road Radars

May 1, 2009
Author(s)
John R. Jendzurski, Nicholas G. Paulter Jr.
We examine the measurement uncertainty associated with different methods of calibrating the ubiquitous down-the-road (DTR) radar used in speed enforcement. These calibration methods include the use of audio frequency sources, tuning forks, a fifth wheel
Displaying 28601 - 28625 of 73929
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