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Displaying 53076 - 53100 of 74045

Measurement Traceability of NIST Standard Rockwell Diamond Indenters

January 1, 1998
Author(s)
Jun-Feng Song, Samuel R. Low III, Walter S. Liggett Jr, David J. Pitchure, Theodore V. Vorburger
A metrology-based Rockwell hardness scale is established by a standard machine and a standard diamond indenter. Both must be established through force and dimensional metrology with acceptably small measurement uncertainties. In 1994, NIST developed a

Measuring Pressures With Cavity Ring-Down Spectroscopy

January 1, 1998
Author(s)
Roger D. van Zee, J P. Looney, Joseph T. Hodges
The industrial demand for sensitive and noninvasive tools with which to measure pressure has spurred the use of optical methods to make these measurements. This paper reviews these industrial needs, and discusses how cavity ring-down spectroscopy can be

Mechanisms of Free Radical Damage to DNA

January 1, 1998
Author(s)
M Miral Dizdar
1.1 Reactions of Free Radicals with DNAFree radicals produce a number of lesions in DNA such as base lesions, sugar lesions, DNA-protein cross-links, single-strand breaks, double-strand breaks and abasic sites by a variety of mechanisms (Teoule and Cadet

Methodology for Obtaining and Using Toxic Potency Data for Fire Hazard Analysis

January 1, 1998
Author(s)
Vyto Babrauskas, Richard Gann, Barbara C. Levin, M Paabo, Richard H. Harris Jr., Richard Peacock, S Yusa
A comprehensive methodology has been developed for obtaining and using smoke toxicity data for fire hazard analysis. This description of the methodology comprises (1) determination that the post-flashover fire is the proper focus of smoke inhalation deaths

Metrological Timelines in Traceability

January 1, 1998
Author(s)
S D. Rasberry, Charles D. Ehrlich
Current developments and applications in the field of metrology have increased the need for correct and appropriate usage of the terms and concepts related to measurement traceability. Besides traceability itself, some of the interrelated terms include
Displaying 53076 - 53100 of 74045
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