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Displaying 51601 - 51625 of 73697

On the Redefinition of the Kilogram

August 6, 1998
Author(s)
B N. Taylor, Peter Mohr
A new definition of the kilogram based on the Einstein relations E = mc^2 and E = hv is proposed, motivated by the recent progress at the National Institute of Standards and Technology in developing a moving-coil watt balance. Such a balance together with

Autoloading Pistols for Police Officers

August 5, 1998
Author(s)
Kathleen M. Higgins, C K. Lord
This standard establishes performance requirements and test methods for pistols to be used by law enforcement officers. This standard is a general revision of and supersedes NIJ Standard-0112.02 dated January 1995, and addresses new pistol designs

Mobile Streams

August 4, 1998
Author(s)
Mudumbai Ranganathan, L S. Andrey, V Schaal
A large class of distributed testing, control and collaborative applications are reactive or event driven in nature. Such applications can be structured as a set of handlers that reacts to events and that in turn can trigger other events. We have developed

The Effect of Supply Air Volume on Room Temperature Stability and Uniformity

August 3, 1998
Author(s)
Stephen J. Treado, Natascha S. Milesi-Ferretti
The effect of supply airflow rate on the thermal conditions in a high-accuracy temperature controlled laboratory space was investigated using the NIST/BFRL Temperature Control Module. Detailed measurements were conducted of air and surface temperatures

Flame Extinction by Sodium Bicarbonate Powder in a Cup Burner

August 2, 1998
Author(s)
Anthony P. Hamins
An apparatus was developed for testing the extinction efficiency of a solid powder in a coflowing non-premixed flame. Extinction measurements were performed by adding agent quasistatically to the oxidizer stream until flame extinction was observed. The

14 C Measurements of Sub-Milligram Carbon Samples From Aerosols

August 1, 1998
Author(s)
R Weissenbok, S R. Biegalski, D Klinedinst, R Golser, George A. Klouda, W Kutschera, A Priller, William N. Rom, P Steier, E Wild, Lloyd A. Currie, R F. Sekerka
Accelerator mass spectrometry [AMS] at the milligram level is routinely performed, but it is difficult to go substantially below 100 ug of carbon. We discuss various approaches for sample preparation, machine operation, and data evaluation, to meet the

A Robust Ontology for Manufacturing Systems Integration

August 1, 1998
Author(s)
Amy Knutilla, Craig I. Schlenoff, Robert W. Ivester
In all types of communication, the ability to share information is often hindered because the meaning of information can be drastically affected by the context in which it is viewed and interpreted. This is especially true in manufacturing because of the

Aerodynamic Databases and Electronic Standards for Windloads

August 1, 1998
Author(s)
T Whalen, Emil Simiu, G Harris, J Y. Lin, D Surry
As part of ongoing National Institute of Standards and Technology research on the development of a new generation of standard provisions for wind loads, we present results of a pilot project on the knowledge-based estimation of wind-induced bending moments

AMS and Microprobe Analysis of Combusted Particles in Ice and Snow

August 1, 1998
Author(s)
S R. Biegalski, George A. Klouda, R Weissenbok, Lloyd A. Currie, Robert A. Fletcher
Ice cores and snow pits of the cryosphere contain particles that detail the history of past atmospheric air compositions. Some of these particles result from combustion processes and have undergone long-range transport to arrive in the Arctic. Recent

Analysis of Sea-Floor Earthquake Data

August 1, 1998
Author(s)
C E. Smith, D M. Boore
The Minerals Management Service (MMS), in cooperation with several oil and gas companies, installed a seismometer network on the ocean floor in the Santa Barbara Channel off the coast of southern California. The program was called SEMS, for the Seafloor

Atomic And Molecular Data And Their Applications

August 1, 1998
Author(s)
Wolfgang L. Wiese
The first International Conference on Atomic and Molecular Data And Their Applications (ICAMDATA) took place at the National Institute of Standards and Technology, Gaithersburg, MD USA, September 29 through October 2, 1997, with 180 participants from 20
Displaying 51601 - 51625 of 73697
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