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Displaying 13676 - 13700 of 17285

A Differential Wavelength Meter for Laser Tuning

January 1, 1997
Author(s)
Lowell P. Howard, Jack A. Stone Jr.
A simple interferometer for matching the wavelengths of tunable lasers is described. Our interferometer uses the angular dispersion of a diffraction grating at the Littrow angle to produce a tilted wavefront with respect to a reference mirror in an

Heat Flux Calibration Flow and Conduction Facilities: Status Report

October 28, 1996
Author(s)
Kenneth D. Steckler, William L. Grosshandler
Standard methods exist at NIST for calibrating thermal radiation detectors up to 10 kW/m2 using blackbody caviies, and up to 40kW/m2 using a monochromatic laser source. Heat Flux transducers, however, are often used under conditions where convection

The ADACS Implementation of the UTAP Architecture

December 1, 1995
Author(s)
Robert Russell, John L. Michaloski, Keith A. Stouffer
The Advanced Deburring and Chamfer System is robotic workcell designed to put precision chamfers on parts made with hard metals. The project was funded by the United States Navy so that the technology developed could be applied to their air defense systems

Scaling Compartment Fires - Reduced- and Full-Scale Enclosure Burns.

September 10, 1995
Author(s)
Nelson P. Bryner, Erik L. Johnsson, William M. Pitts
An extensive series of over 140 natural gas fires in a 2/5ths-scale model of a standard room has been previously reported. This work extends the earlier reduced-scale enclosure (RSE) study to a full-scale enclosure (FSE) and focuses on comparing the gas

Ultrafine Combustion Aerosol Generator

January 1, 1992
Author(s)
Thomas G. Cleary, George W. Mulholland, Lewis K. Ives, Robert A. Fletcher, J. W. Gentry
We are able to produce a narrowly distributed combustion aerosol with a mean particle size of about 10 nm by operating a laminar diffusion burner with acetylene fuel in the nominal "presooting" condition. Number concentrations of approximately 106

Differential scanning calorimetry (DSC): An important tool for polymer identification and characterization of plastic marine debris

February 19, 2024
Author(s)
Jennifer Lynch, Raquel Corniuk, Kayla C. Brignac, Melissa Jung, Joelle Marchiani, Wanda Weatherford
… an in-house thermogram library from 201 polymer reference standards. We determined peak melting temperature cutoffs for … PE cutoffs remained stable after experimentally weathering standards outdoors or for severely weathered HDPE debris …

Satellite Instrument Calibration for Measuring Global Climate Change

October 12, 2021
Author(s)
G Ohring, B Wielicki, R Spencer, W Emery, Raju V. Datla
… instrument calibration, the National Institute of Standards and Technology (NIST), National Polar-orbiting … working on state of the art calibration sources and standards, participated.The workshop defined the absolute …

Three-dimensional particle size, shape, and internal porosity characterization: Application to five similar titanium alloy (Ti-6Al-4V) powders and comparison to two-dimensional measurements

May 26, 2021
Author(s)
Edward Garboczi, Rainer Hebert, Yu Sun, Mark Aindow
… that were all nominally meeting additive manufacturing standards. One of the methods, two-dimensional (2D) dynamic … several ways. All these results show that current powder standards, which all five powders met, are inadequate to …
Displaying 13676 - 13700 of 17285
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