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Search Publications by Jun-Feng Song

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Displaying 76 - 100 of 143

Standards for Optical Imaging Systems in Forensic Laboratories

Author(s)
Jun-Feng Song, Theodore V. Vorburger, Robert A. Clary, Eric P. Whitenton, Li Ma, Susan M. Ballou
NIST RM (Reverence Material) 8240/2350 standard bullet and casing project is currently ongoing to support the National Integrated Ballistics Information Network

SRM 2460/2461 Standard Bullets and Casings Project

Author(s)
Jun-Feng Song, Eric P. Whitenton, David R. Kelley, Robert A. Clary, L Ma, Susan M. Ballou, M Ols
The National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 2460/2461 standard bullets and casings project will provide support

Progress in Developing NIST Standard Casings

Author(s)
Jun-Feng Song, Theodore V. Vorburger, M Ols
Standard casings and bullets are currently under development to support the National Integrated Ballistics information Network (NIBIN). The master casings are

Atomic Level Surface Metrology

Author(s)
Theodore V. Vorburger, Ronald G. Dixson, Jun-Feng Song, Thomas B. Renegar, Joseph Fu, Ndubuisi G. Orji, V W. Tsai, E. C. Williams, H Edwards, D Cook, P West, R Nyffenegger
MotivationSemiconductor wafers and many types of optical elementsrequire ultra-smooth surfaces in order to functionas specifiedExamples:Laser gyro mirrors with

Modeling, Simulation and Prediction of Rockwell Hardness Indentation

Author(s)
Li Ma, J Zhou, Theodore V. Vorburger, R Dewit, Richard J. Fields, Samuel R. Low III, Jun-Feng Song
Rockwell hardness test, as a measure of the resistance of a material to localized plastic deformation, is a valuable and widely used mechanical test. However

Dimensional Metrology of Millimeter- and Sub-millimeter-scale Components

Author(s)
Theodore V. Vorburger, Jun-Feng Song, Joseph Fu, M Tundermann, Thomas B. Renegar, Theodore D. Doiron, N G. Orji
Decreasing sizes and tolerances of engineering components bring a demand for decreasing uncertainty in the dimensional measurements of these parts. Hence there

Capability in Rockwell C Scale Hardness

Author(s)
Walter S. Liggett Jr, Samuel R. Low III, David J. Pitchure, Jun-Feng Song
A measurement system is capable if it produces measurements with uncertainties small enough for demonstration of compliance with product specifications. To

Capability in Rockwell C Scale Hardness

Author(s)
Walter S. Liggett Jr, Samuel R. Low III, David J. Pitchure, Jun-Feng Song
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