U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 23851 - 23875 of 73727

Combining Results from Multiple Evaluations of the Same Measurand

December 1, 2011
Author(s)
Raghu N. Kacker, Klaus-Dieter Sommer
According to the Guide to the Expression of Uncertainty in Measurement (GUM), a result of measurement consists of a measured value together with its associated standard uncertainty. The measured value and the standard uncertainty are interpreted as the

Computing Network Reliability Coefficients

December 1, 2011
Author(s)
Elizabeth R. Moseman, Isabel M. Beichl, Francis Sullivan
When a network is modeled by a graph and edges of the graph remain reliable with a given probability p, the probability of the graph remaining connected is called the reliability of the network. One form of the reliability polynomial has as coefficients

Ductile-Fracture Resistance in X100 Pipeline Welds Measured with CTOA

December 1, 2011
Author(s)
Elizabeth S. Drexler, Philippe P. Darcis, Christopher N. McCowan, Jeffrey W. Sowards, Joseph D. McColskey, Thomas A. Siewert
A test for evaluation of resistance to ductile fracture (crack tip opening angle, CTOA) was found to reveal changes in crack propagation through the strain and strength gradients near weld joints in X100 pipeline steels. This test provides a long ligament

How well do you know your MATES???

December 1, 2011
Author(s)
Joy P. Dunkers
There is a group that quietly goes about the business of advancing the areas of tissue engineering and regenerative medicine. I say quietly because their work, while impactful, is not well known outside of government circles. How well do you know your

Letter to the Editor of the CTBUH Journal

December 1, 2011
Author(s)
Sivaraj Shyam-Sunder, Jason D. Averill, Fahim Sadek
NIST was invited to comment on the articles written for a special issue of the CTBUH Journal, marking the ten years passed since the 2001 9/11 attacks on the World Trade Center. This letter to the editor reacts to the role of the NIST WTC Investigation

Nanofibers for RF and Beyond

December 1, 2011
Author(s)
Thomas M. Wallis, Kichul Kim, Pavel Kabos, Dejan Filipovic
In order to realize new interconnect concepts based on nanofibers, reliable metrology is required. Given the clock-speeds of integrated circuits in the present as well as the foreseeable future, this metrology must be compatible with radio frequencies (RF)

Noise floor reduction of an Er:fiber laser-based photonic microwave generator

December 1, 2011
Author(s)
Haifeng (. Jiang, Jennifer A. Taylor, Franklyn J. Quinlan, Tara M. Fortier, Scott A. Diddams
Commercially available erbium-doped mode-locked fiber lasers are compact, robust, and suitable to be the frequency divider of an ultra-low phase noise photonic microwave generator. However, for a mode-locked fiber laser with repetition rate of a few

Objective Evaluation of Imager Performance

December 1, 2011
Author(s)
Francine K. Amon, Dennis D. Leber, Nicholas Paulter
We describe a method by which the evaluation and characterization of the performance of an imager can be done objectively and scientifically, that is, without routine operator interpretation. Although this method is demonstrated herein for passive long

Performance of Face Recognition Algorithms on Compressed Images

December 1, 2011
Author(s)
George W. Quinn, Patrick J. Grother
This report provides a comprehensive assessment of the ability of face recognition algorithms to compare compressed standard face images. Six well performing algorithms from the Multiple Biometric Evaluation (MBE) 2010 Still Face Track are used to compare

Predicted Energy Resolution of a Running-Sum Algorithm for Microcalorimeters

December 1, 2011
Author(s)
Bradley K. Alpert, William B. Doriese, Joseph W. Fowler, Joel N. Ullom
The energy resolution of a high-pulse-rate filtering algorithm recently introduced by Hui Tan et al., based on running sums of TES microcalorimeter output streams, is predicted from average pulse shape and noise autocovariance. We compare with empirical

Spectral Line-by-Line Pulse Shaping of On-Chip Microresonator Frequency Combs

December 1, 2011
Author(s)
Fahmida Ferdous, Houxun H. Miao, Daniel E. Leaird, Kartik Srinivasan, Jian Wang, Lei Chen, Leo T. Varghese, Andrew M. Weiner
We report, for the first time to the best of our knowledge, spectral phase characterization and line-by-line pulse shaping of an optical frequency comb generated by nonlinear wave mixing in a micro-ring resonator. The comb is compressed to a train of near
Displaying 23851 - 23875 of 73727
Was this page helpful?