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 by: James H. Yen (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 51 - 75 of 82

Determination of Organic Acids in Vaccinium Berry Standard Reference Materials

June 27, 2010
Author(s)
Melissa M. Phillips, Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise, Catherine A. Rimmer, Ryan Case, James H. Yen
Nine organic acids (citric acid, galacturonic acid, glycolic acid, isocitric acid, malic acid, oxalic acid, quinic acid, shikimic acid, and tartaric acid) and two anions (phosphate and sulfate) were determined in a suite of Vaccinium berry containing

Certification of Three NIST Renewal Soil Standard Reference Materials(R) for Element Content: SRM 2709a San Joaquin Soil, SRM 2710a Montana Soil I, and SRM 2711a Montana Soil II

June 1, 2010
Author(s)
Elizabeth A. Mackey, Christopher S. Johnson, Richard M. Lindstrom, Stephen E. Long, Anthony F. Marlow, Karen E. Murphy, Rick L. Paul, Rachel S. Popelka-Filcoff, Savelas A. Rabb, John R. Sieber, Rabia Oflaz, Bryan E. Tomlin, Laura J. Wood, James H. Yen, Lee L. Yu, Rolf L. Zeisler, S. A. Wilson, M. G. Adams, Z. A. Brown, P. L. Lamothe, J. E. Taggart, C. Jones, J. Nebelsick
For the past 20 y, the National Institute of Standards and Technology has provided three soil Standard Reference Materials certified for element content: SRM 2709 San Joaquin Soil (Baseline Trace Element Concentrations); SRM 2710 Montana Soil I (Highly

Three steps towards metrological traceability for ballistics signature measurements

January 31, 2010
Author(s)
Jun-Feng Song, Theodore Vorburger, Robert Thompson, Thomas Renegar, Xiaoyu Zheng, Li Ma, James Yen, Martin Ols
The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 bullets and 2461 casings. NIST and ATF are proposing to

An Estimate of Effect Size Based on the Mann-Whitney Statistic

October 16, 2008
Author(s)
James H. Yen
Meta analysis, the statistical synthesis of results from several different studies, often involves combining estimates of effect sizefrom several experiments. The standardized mean difference is one of the most commonly used estimates of effect size

Robust Estimation of Effect Sizes Using Influence Functions

October 16, 2008
Author(s)
James H. Yen
The estimation of effect sizes is crucial part of meta-analysis. This papers uses influence functions as a fundamental tool in the analysis of estimates of effect size. The generalization to several variables of the influence function provides heuristic

Trimmed Weighted Means

October 16, 2008
Author(s)
James H. Yen
In many situations, weighted means can achieve much lower variances than unweighted means by placing more weight on those observations that are more precise. However, that weighted means can be dominated by one or two observations with very large weights

Certification of Standard Reference Materials for Bitter Orange

July 1, 2008
Author(s)
Lane C. Sander, K. Putzbach, Bryant C. Nelson, Catherine A. Rimmer, Mary Bedner, Jeanice M. Brown Thomas, Barbara J. Porter, Laura J. Wood, Michele M. Schantz, Karen E. Murphy, Katherine E. Sharpless, Stephen A. Wise, James H. Yen, P. H. Siitonen, R. I. Evans, A. NguyenPho, M. C. Roman, J. M. Betz

Characterization of a Suite of Ginkgo-Containing Standard Reference Materials

September 1, 2007
Author(s)
Catherine A. Rimmer, S. Howerton, Katherine E. Sharpless, Lane C. Sander, Stephen E. Long, Karen E. Murphy, Barbara J. Porter, K. Putzbach, M. S. Rearick, Stephen A. Wise, Laura J. Wood, Rolf L. Zeisler, Diane K. Hancock, James H. Yen, J. M. Betz, A. NguyenPho, L. Yang, C. Scriver, S. N. Willie, R. Sturgeon, B. Schaneberg, C. Nelson, J. Skamarack, M. Pan, L. Kerri, D. Gray, E. H. Waysek, A. Blatter, E. Reich

Surface Topography Analysis for a Feasibility Assessment of a National Ballistics Imaging Database

May 1, 2007
Author(s)
Theodore V. Vorburger, James H. Yen, B Bachrach, Thomas Brian Renegar, Li Ma, Hyug-Gyo Rhee, Xiaoyu Alan Zheng, Jun-Feng Song, Charles D. Foreman
This document reports on a study to determine the feasibility and utility of a national ballistics database of casing and bullet images. The purpose of such a proposed database would be to provide a reference collection of ballistic images against which

Determination of Caffeine, and Caffeine-Related Metabolites in Ephedra-Containing Standard Reference Materials Using Liquid Chromatography With Absorbance Detection and Tandem Mass Spectrometry

April 24, 2007
Author(s)
Jeanice M. Brown Thomas, Katherine E. Sharpless, S. Mitvalsky, Mark Roman, James H. Yen, Mary B. Satterfield
The concentration of caffeine and caffeine-related compounds in two ephedra-containing reference materials have been determined by three independent methods with measurements performed by the National Institute of Standards and Technology (NIST) and a

Preparation and Characterization of a Suite of Ephedra-Containing Standard Reference Materials

November 1, 2006
Author(s)
Katherine E. Sharpless, David L. Anderson, Therese A. Butler, J. M. Betz, Douglas A. Howell, S. G. Capar, J. Cheng, C. Fraser, G. Gardner, T. Ihara, J. W. Lam, Stephen E. Long, Elizabeth A. Mackey, M. McCooeye, Karen E. Murphy, W. R. Mindak, S. Mitvalsky, Karen W. Phinney, Barbara J. Porter, A. NguyenPho, Lane C. Sander, M. C. Roman, Mary B. Satterfield, Jeanice M. Brown Thomas, C. Scriver, R. E. Sturgeon, Robert D. Vocke Jr., Stephen A. Wise, Laura J. Wood, James H. Yen, L. Yang, G. C. Ziobro

Calcium Phosphate Cement With Non-Rigidity and Strength Durability for Periodontal Bone Repair

August 1, 2006
Author(s)
Hockin D. Xu, Shozo Takagi, Limin Sun, L A. Hussain, Laurence C. Chow, William F. Guthrie, James H. Yen
Background. The need for biomaterials to treat periodontal osseous defects has increased as the world population ages. The objective of the present study was to develop a self-hardening, resorbable, and mech/anically strong calcium phosphate cement (CPC)

Preparation and Characterization of a Suite of Ephedra-Containing Standard Reference Materials

June 1, 2006
Author(s)
Katherine E. Sharpless, D L. Anderson, J. M. Betz, Therese A. Butler, S. G. Capar, J. Cheng, C. Fraser, M. L. Gay, G. Gardner, D W. Howell, T. Ihara, J. W. Lam, Stephen E. Long, M. McCooeye, Elizabeth A. Mackey, W. R. Mindak, S. Mitvalsky, Karen E. Murphy, Karen W. Phinney, A. NguyenPho, Barbara J. Porter, M. C. Roman, Lane C. Sander, Mary B. Satterfield, C. Scriver, R. E. Sturgeon, Jeanice M. Brown Thomas, Robert D. Vocke Jr., Stephen A. Wise, Laura J. Wood, L. Yang, James H. Yen, G. C. Ziobro

Improving the Usability and Accessibility of Voting Systems and Products

May 7, 2004
Author(s)
Sharon J. Laskowski, James H. Yen, Marguerite W. Autry, J Cuginin, William H. Killam
The goal of this report is to describe how research and best practices from the human factors, human-machine and human-computer interaction, and usability engineering disciplines can be brought to bear to improve the usability and accessibility of voting

Improving the Usability and Accessibility of Voting Systems and Products

April 1, 2004
Author(s)
Sharon J. Laskowski, James H. Yen, M Autry, John V. Cugini, W Killam
In the Help America Vote Act (HAVA) of 2002, Public Law 107-252, the Election Assistance Commission, in consultation with the National Institute of Standards and Technology, is mandated to submit a report on human factors, usability, and accessibility to

Multimodal Biometrics: Issues in Design and Testing

November 1, 2003
Author(s)
Robert D. Snelick, Michael D. Indovina, James H. Yen, Alan Mink
The results of experimental studies on multimodal biometric systems for small-scale populations have shown better performance compared to single-mode biometric systems. We examine if such techniques scale to larger populations, introduce a methodology to
Was this page helpful?