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Metrology

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Displaying 1126 - 1150 of 2730

NIST Micronutrients Measurement Quality Assurance Program Summer 2010 Comparability Studies: Results for Round Robin LXVIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 33 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2011 Comparability Studies Results for Round Robin LXX Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 35 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2010 Comparability Studies: Results for Round Robin LXVII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 32 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2011 Comparability Studies: Results for Round Robin LXIX Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 34 Ascorbic Acid in Human Serum

August 2, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

Significance Test with Data Dependency in Speaker Recognition Evaluation

July 25, 2013
Author(s)
Jin Chu Wu, Alvin F. Martin, Craig S. Greenberg, Raghu N. Kacker, Vincent M. Stanford
To evaluate the performance of speaker recognition systems, a detection cost function defined as a weighted sum of the probabilities of type I and type II errors is employed. The speaker datasets may have data dependency due to multiple uses of the same

Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

July 15, 2013
Author(s)
Behrang H. Hamadani, John F. Roller, Brian P. Dougherty, Fiona Persaud, Howard W. Yoon
An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-based

Method for Measuring Axis Orthogonality in MEMS Accelerometers

July 15, 2013
Author(s)
Craig D. McGray, Muhammad Y. Afridi, Jon C. Geist
A method is described for the computation of axis orthogonality errors in 3-axis accelerometers, based on the application of gravitational force at known angles. A precision two-axis articulated gimbal system is used to control the angle at which the

Picometer metrology for precise measurement of refractive index, pressure, and temperature

July 14, 2013
Author(s)
Jack A. Stone Jr., Patrick F. Egan, Jay H. Hendricks, Gregory F. Strouse, Douglas A. Olson, Jacob E. Ricker, Gregory E. Scace
For several years we have been studying the use of Fabry-Perot interferometers for precise measurement of the refractive index of gasses, where the primary motivation has been to improve interferometer-based length measurement. Because the refractive index

THE EFFECT OF MICROSTRUCTURE ON THE HYDROGEN-ASSISTED FATIGUE OF PIPELINE STEELS

July 14, 2013
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Robert L. Amaro, Damian S. Lauria, April Stevenson, Douglas G. Stalheim, Louis E. Hayden
Tests on the fatigue crack growth rate were conducted on four pipeline steels, two of grade API 5L- X52 and two API 5L-X70. One X52 material was from the mid 1960s and the other was manufactured in 2011. The two X70 materials had a similar vintage and

Initial ACT-R Extensions for User Modeling in the Mobile Touchscreen Domain

July 12, 2013
Author(s)
Kristen Greene, Franklin Tamborello
Advances in mobile touchscreen computing offer new opportunities to test traditional cognitive architectures and modeling tools in a novel task domain. ACT-Touch, an extension of the ACT-R 6 (Adaptive Control of Thought- Rational) cognitive architecture

Metrological Challenges Introduced by New Tolerancing Standards

July 5, 2013
Author(s)
Ed Morse, Yue Peng, Vijay Srinivasan, Craig M. Shakarji
The recent release of ISO 14405-1 has provided designers with a richer set of specification tools for the size of part features, so that various functional requirements can be captured with greater fidelity. However, these tools also bring new challenges

3D Ground-Truth Systems for Object/Human Recognition and Tracking

June 28, 2013
Author(s)
Afzal A. Godil, Roger V. Bostelman, Kamel Saidi, William P. Shackleford, Geraldine Cheok, Michael O. Shneier, Tsai H. Hong
We have been researching 3D ground-truth systems for performance evaluation of vision and perception systems in the fields of smart manufacturing and robotics safety. In this paper we first present an overview of different systems that have been used to

Measurement Science for 6DOF object pose ground truth

June 28, 2013
Author(s)
Roger D. Eastman, Jeremy Marvel, Joseph Falco, Tsai H. Hong
Users of perception systems in industrial manufacturing applications need standardized, third party ground truth procedures to validate system performance before deployment. Many manufacturing robotic applications require parts and assemblies to be

NIST Micronutrients Measurement Quality Assurance Program Summer 2001 Comparability Studies: Results for Round Robin L Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 15 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2002 Comparability Studies: Results for Round Robin LII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 17 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Margaret C. Kline, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2003 Comparability Studies: Results for Round Robin LIV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 19 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2004 Comparability Studies: Results for Round Robin LVI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 21 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2005 Comparability Studies: Results for Round Robin LVIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 23 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Summer 2006 Comparability Studies: Results for Round Robin LX Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 25 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2002 Comparability Studies: Results for Round Robin LI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 16 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas, Sam A. Margolis
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes

NIST Micronutrients Measurement Quality Assurance Program Winter 2003 Comparability Studies: Results for Round Robin LIII Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 18 Ascorbic Acid in Human Serum

June 27, 2013
Author(s)
David L. Duewer, Katherine E. Sharpless, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes
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