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Search Publications

NIST Authors in Bold

Displaying 47276 - 47300 of 73697

Nonlinear Ultrasonic Assessment of Precipitation Hardening in ASTM A710 Steel

September 1, 2000
Author(s)
Donna C. Hurley, Davor Balzar, P T. Purtscher
We investigated several specimens of ASTM A710 steel containing copper-rich precipitates with variations in the final aging treatment. X-ray diffraction line-broadening and small-angle neutron-scattering experiments revealed the existence of the

On the Dispersion of Lightning Current After a Direct Flash to a Building

September 1, 2000
Author(s)
Francois D. Martzloff
Simplifications often made when simulating the dispersion of lightning current can yield results that depart too much from the complex reality of a direct lightning flash to a building. The unpredictable occurrence of side-flashes increases even more the

Radiometric Calibration History of Visible and Near-Infrared Portable Radiometers

September 1, 2000
Author(s)
Bettye C. Johnson, Steven W. Brown, Howard W. Yoon
The National Institute of Standards and Technology (NIST), with the support of the National Aeronautics and Space Administration (NASA), has built several transfer radiometers that are used in radiometric measurement comparisons to validate spectral

Refrigerant/Lubricant Mixture Boiling Heat Transfer Research at NIST

September 1, 2000
Author(s)
Mark A. Kedzierski
This paper overviews the boiling heat transfer research of the recent few years at NIST (National Institute of Standards and Technology) on refrigerant/lubricant mixtures. The aim of the research was to fundamentally understand the effects of lubricant

Relationship Between Thermocouple and Radiation Thermometer Measurements

September 1, 2000
Author(s)
D P. DeWitt
The purpose of this vuegraph presentation is to describe the relationship between temperatures measured by thermocouples (contact) and radiation thermometers (RTs). The procedures are discussed for calibration of light-pipe RTs (LPRTs) using blackbodies

Repeatability of Energy Consumption Test Results for Compact Refrigerators

September 1, 2000
Author(s)
David A. Yashar
Recently, the United States Department of Energy (DOE) has been interested in examining the current procedure that is used to measure the energy consumption of compact refrigerators (ANSI/AHAM HRF-1). As part of the DOE's Appliance Standards Program, NIST

Semiconductor Characterization and Analytical Technology

September 1, 2000
Author(s)
Thomas J. Shaffner
The utility of semiconductor characterization techniques continues to be measured by industry requirements for smaller device geometry, atomically smooth surfaces and interfaces, and increased material purity. Those techniques that specialize in the

Single Fiber Composites: A New Methodology for Determinig Interfacial Shear Strength

September 1, 2000
Author(s)
Gale A. Holmes, Donald L. Hunston, Walter G. McDonough, R C. Peterson
Two of the critical factors controlling the long-term performance and durability of composites in structural applications is the fiber-matrix interfacial shear strength (IFSS) and the durability of the fiber-matrix interface. The single fiber fragmentation

SMAT: Synchronous Multimedia and Annotation Tool

September 1, 2000
Author(s)
Michelle P. Steves, Mudumbai Ranganathan, Emile L. Morse
We describe the design and use of SMAT (Synchronous Multimedia and Annotation Tool), a tool designed to be part of a scientific collaboratory for use in a robotic-arc-welding research project at the National Institute of Standards and Technology (NIST)

Some Enlightening Case Histories on Lightning Damage

September 1, 2000
Author(s)
T. S. Key, D. Nastasi, K. O. Phipps, Francois D. Martzloff
Lightning related damage stories abound, but it is not always possible to document precisely the mechanisms and scenarios involved when timely, first-hand knowledge is not obtainable. From a collection of case histories accumulated by the authors, three

Stab Resistance of Personal Body Armor

September 1, 2000
Author(s)
Kirk D. Rice
The purpose of this standard is to establish minimum performance requirements and methods of test for the stab resistance of personal body armor intended to protect the torso against slash and stab threats. This standard is based on technical work

Structural Study of Ba 11 Fe 8 Ti 9 O 41 by X-Ray Diffraction

September 1, 2000
Author(s)
T Siegrist, C Svensson, Terrell A. Vanderah, Robert S. Roth
The crystal structure of Ba 11Fe 8Ti 9O 41 was determined using single-crystal and powder X-ray diffraction nethods. This new phase crystallizes in the hexagonal space group P6 3/mmc (No 194) (a=5.7506(3) , c=61.413(2) ; Z=2; Pcalc=5.75 g/cm 3) and

Synthesis, Characterization and Evaluation of Urethane Derivatives of Bis-GMA

September 1, 2000
Author(s)
C A. Khatri, J W. Stansbury, Carl R. Schultesiz, Joseph M. Antonucci
The dimethacrylate monomer designated as Bis-GMA ushered in the modern era of polymeric dental restorative, sealant and adhesive materials. Because of its high viscosity, primarily due to the strong hydrogen bond interactions arising from its two hydroxyl

Technical Digest, Symposium on Optical Fiber Measurements, 2000

September 1, 2000
Author(s)
Paul A. Williams, Gordon W. Day
Polarization mode dispersion (PMD), multimode fiber parameters, fiber geometry and chromatic dispersion mapping in fibers are some of the measurement issues in this digest of papers presented at the Symposium on Optical Fiber Measurements held September 26

The Effect of Oscillatory Shear Flow on Step Bunching

September 1, 2000
Author(s)
B T. Murray, Sam R. Coriell, A A. Chernov, Geoffrey B. McFadden
During crystal growth, an imposed shear flow at the crystal-fluid interface can impact the conditions for the onset of morphological instability. In previous work, we studied the effect of time-independent shear flows and anisotropic interface kinetics on
Displaying 47276 - 47300 of 73697
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