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Author: walter liggett jr
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1. A New Method of Certifying Standardized Rockwell Hardness Test Blocks
Published: 9/1/1998
Authors: Samuel Rea Low III, Walter S Liggett Jr, David J Pitchure
Abstract: Rockwell hardness test blocks, whether standardized at the primary national laboratory level or by secondary commercial laboratories, have been certified historically by determining an average hardness value for the test surface of the block. Howeve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852885

2. An Empirical Approach to Determining Rockwell Hardness Measurement Uncertainty
Published: 7/1/2002
Authors: Samuel Rea Low III, Walter S Liggett Jr
Abstract: Characteristics of the empirically developed Rockwell hardness test make it difficult to determine measurement uncertainty using methods traditionally applied to other metrological measurements. An empirical approach to determining Rockwell hardness ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853176

3. Assessment Error Sources in Rockwell Hardness Measurements
Published: 6/1/1999
Authors: Walter S Liggett Jr, Samuel Rea Low III, David J Pitchure, Jun-Feng Song
Abstract: In the use of hardness test blocks, the uncertainty due to block non-uniformity can be reduced if one is willing to make measurements at specified locations on the blocks. Statistical methods for achieving this reduction are explained in this paper. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820936

4. Assessment of Error Sources in Rockwell Hardness Measurements
Published: Date unknown
Authors: Walter S Liggett Jr, Samuel Rea Low III, David J Pitchure, Jun-Feng Song
Abstract: In the use of hardness test blocks, the uncertainty due to block non-uniformity can be reduced if one is willing to make measurements at specified locations on the blocks. Statistical methods for achieving this reduction are explained in this paper. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151747

5. Capability in Rockwell C Scale Hardness
Series: Journal of Research (NIST JRES)
Published: 7/1/2000
Authors: Walter S Liggett Jr, Samuel Rea Low III, David J Pitchure, Jun-Feng Song
Abstract: To determine the capability of a system for Rockwell C scale hardness, one must make test measurements, which can be planned and interpreted as explained in this paper. Uncertainty, which is one part of capability, is treated specifically, and produ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151752

6. Capability in Rockwell C Scale Hardness
Published: 7/1/2000
Authors: Walter S Liggett Jr, Samuel Rea Low III, David J Pitchure, Jun-Feng Song
Abstract: A measurement system is capable if it produces measurements with uncertainties small enough for demonstration of compliance with product specifications. To establish the capability of a system for Rockwell C scale hardness, one must assess measuremen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821003

7. Chapter - Batch effects and experimental noise in Microarray Analysis: sources and solutions. Microarray Gene Expressions: The Effects of Varying Certain Measurement Conditions.
Published: 11/2/2009
Author: Walter S Liggett Jr
Abstract: This chapter explores measurements from an experiment with a batch effect induced by switching the mass of RNA analyzed from 400 ng to 200 ng. The experiment has as additional factors the RNA material (liver, kidney, and two mixtures) and the RNA so ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902709

8. Data Mining Electron Microscope Images to Estimate a Particle Size Distribution
Published: Date unknown
Authors: Walter S Liggett Jr, Robert A Fletcher
Abstract: The application considered involves density estimation, spatial prediction, and sizing error. The goal is estimation of a particle size distribution; the data are scanning electron microscope (SEM) images that constitute a sample of a filter surface ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151352

9. Data Selection for Broadcast News CSR Evaluations
Published: 8/1/1998
Authors: W M Fisher, Walter S Liggett Jr, A N Le, Jonathan G Fiscus, D S Pallett
Abstract: Composition of the 1997 Hub-4 broadcast news test set is discussed. The composition is based on concurrent selection of a statistically equivalent test set for a future evaluation, adjustment of the set to match the training data, and other consider ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=151366

10. Data-Driven and Peak-Based Feature Selection In Serum Protein Mass Spectrometry
Published: Date unknown
Authors: Walter S Liggett Jr, Peter E. Dr. Barker, O J Semmes, L H Cazares
Abstract: Consider functional canonical correlation analysis (CCA) applied to disjoint sections of lengthy protein mass spectra for the purpose of finding long-distance correlation structure. The relations between the CCA weight functions, which are derived f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830466



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