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Displaying 12876 - 12900 of 17284

Ultrasound Power Measurement by Pulsed Radiation Pressure

August 2, 1999
Author(s)
Steven E. Fick
In a specially designed radiation force balance (RFB), low-frequency pulse modulation of the incident ultrasound allows high-accuracy measurement of time-averaged spatially-integrated ultrasound power radiated into a reflectionless water load. Errors

Isochoric p-rho-T and Heat Capacity Cv Measurements for Ternary Refrigerant Mixtures Containing Difluoromethane (R32), Pentafluoroethane (R125), and 1,1,1,2-Tetrafluoroethane (R134a) From 200 to 400 at Pressures to 35 MPa

June 1, 1999
Author(s)
Joe W. Magee
The p-p-T relationships and constant volume heat capacity C υ were measured fro ternary refrigerant mixtures by isochoric methods with gravimetric determinations of the amount of substance. Temperatures ranged from 200 to 400 K for p-p-T and from 203 to

Toward Nanometer Accuracy Measurements

June 1, 1999
Author(s)
John A. Kramar, E Amatucci, David E. Gilsinn, Jay S. Jun, William B. Penzes, Fredric Scire, E C. Teague, John S. Villarrubia
We at NIST are building a metrology instrument called the Molecular Measuring Machine (MMM) with the goal of performing 2D point-to-point measurements with one nanometer accuracy cover a 50 mm by 50 mm area. The instrument combines a scanning tunneling

Evaluation of Kitchen Cooking Appliance Efficiency Test Procedures

January 1, 1999
Author(s)
Steven J. Nabinger
In 1978, the Department of Energy (DOE) published a Final Rule containing test procedures for measuring the efficiency and energy consumption of conventional ranges, ovens, cooking tops, and microwave ovens. Based on a number of technical concerns

Virtual Factory Project Tackles Integration of Supply Chain Systems

January 1, 1999
Author(s)
J. Cartwright, J. Friedman, J. Minchella, Barbara L. Goldstein
… to unpredictable market conditions, the serious lack of standards for information integration among cross-company and … the overall purpose of this project is to define standards which, when implemented, will reduce both the time …

Plastic Flip-Chip-BGA Carrier With Microvias for Chip Scale Packaging

June 2, 1998
Author(s)
Jan Obrzut, M Jimarez
We evaluated a near-chip-scale package, that utilizes the flip-chip, plastic-ball-grid-array technology with microvias. The microvias were photolithographically patterned in built-up dielectric layers. We verified optimal conditions for photo-exposure and

A critical evalution of thermal mass flow meters

January 5, 1996
Author(s)
S A. Tison
… performance. While some attempt has been made via written standards to address the specifications of the instruments, these standards do not address all performance issues and cannot …

CALS Technologies Applied to the Fiber/Textile/Apparel Industry

June 1, 1994
Author(s)
Howard T. Moncarz, Yung-Tsun Lee
The fiber/textile/apparel (FTA) industry is one of America''s largest manufacturing industries, and its success is critical to the economic well-being of the country. In terms of technology, the industry is very sophisticated, and in fact, each of its

High-Power Radiation-Pressure-based Laser Metrology Using an Electrostatic Force Balance

September 11, 2023
Author(s)
Brian Simonds, Kyle Rogers, Sven Schulze, David Newell, Gordon Shaw, John Lehman, Paul A. Williams
A primary standard electrostatic force balance has been integrated into a multiple-reflection radiation pressure-based laser power meter capable of measuring kilowatts of optical power. We present optical power data at 0.1 kW, 1 kW, 2 kW, and 5 kW with the

Cybersecurity Definitions for Non-Experts

August 6, 2023
Author(s)
Lorenzo Neil, Julie Haney, Kerrianne Buchanan, Charlotte Healy
Despite the importance of cybersecurity, there is no standard definition nor common terminology for explaining cybersecurity. Existing definitions largely target academics or technical experts but not non-experts (those without cybersecurity proficiency)

STEP File Analyzer and Viewer User Guide (Update 7)

October 13, 2021
Author(s)
Robert R. Lipman
The STEP File Analyzer and Viewer opens a STEP (ISO 10303 - STandard for Exchange of Product model data) Part 21 file and (1) generates a spreadsheet or CSV files of all entity and attribute information, (2) creates a visualization (view) of part geometry
Displaying 12876 - 12900 of 17284
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