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Displaying 3901 - 3925 of 4199

NIST Ballistics Toolmark Research Database

January 27, 2020
Author(s)
Xiaoyu Alan Zheng, Johannes A. Soons, Robert M. Thompson, Sushama P. Singh, Cerasela Constantin
In 2009, a report by the National Academies called into question, amongst other issues, the objectivity of visual toolmark identification by firearms examiners. The National Academies recommended development of objective toolmark identification criteria

Certification of SRM 2497: Standard Reference Concrete for Rheological Measurements

April 22, 2019
Author(s)
Nicos Martys, Max A. Peltz, William L. George, Blaza Toman, Edward J. Garboczi, Chiara Ferraris
Rotational rheometers are commonly used to determine the rheological properties of fluids such as viscosity and yield stress [Fer12]. Manufacturers generally recommend the use of a standard oil of known viscosity to verify that the instrument is operating

ASTM E3125 Laser Scanner Standard: Challenges and Role of NIST

July 24, 2018
Author(s)
Prem K. Rachakonda
The Dimensional Metrology Group (DMG) at National Institute of Standards & Technology (NIST), along with various other organizations were involved in the development of the ASTM E3125-17 documentary standard for 3D imaging systems. The ASTM E57 committee

Nanotribology: the Link to Macrotribology

February 19, 2017
Author(s)
Stephen M. Hsu
… blossom into untold technologies in medicine, health-care, manufacturing, microelectronics, aerospace,informatics. …

The Canonical Robot Command Language (CRCL)

August 1, 2016
Author(s)
Frederick M. Proctor, Stephen B. Balakirsky, Zeid Kootbally, Thomas R. Kramer, Craig I. Schlenoff, William P. Shackleford
Industrial robots can perform motion with sub-millimeter repeatability when programmed using the teach-and-playback method. While effective, this method requires significant up-front time, tying up the robot and a person during the teaching phase. Off-line

The I/O transform of a chemical sensor

March 14, 2016
Author(s)
Nalin Katta, Douglas C. Meier, Kurt D. Benkstein, Stephen Semancik, Baranidharan Raman
A number of sensing technologies using a variety of transduction principles have been proposed for the purpose of non-invasive chemical sensing. A fundamental problem common to all sensing technologies is determining what features of the transducer's

Calibration and Measurement Procedures for a High Magnification Thermal Camera

January 8, 2016
Author(s)
Brandon M. Lane, Eric P. Whitenton
Infrared thermography is a relatively mature measurement science, however systematic evaluation of measurement uncertainty for multi-point measurement (an infrared focal plane array) is very limited, or, does not follow uncertainty evaluation guidelines
Displaying 3901 - 3925 of 4199
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