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NIST Authors in Bold

Displaying 51751 - 51775 of 73697

Comparison of the NIST and ENEA Air Kerma Standards

July 1, 1998
Author(s)
R F. Laitano, P J. Lamperti, M P. Toni
A comparison was made between the NIST and ENEA air kerma standards for medium energy x-rays and 60Co gamma rays. The comparison took place at ENEA in June 1994. Two different transfer chambers from NIST were used for the comparison. The measurements were

Conformance Testing Object-Oriented Frameworks Using JAVA

July 1, 1998
Author(s)
Kevin G. Brady, James A. St Pierre
This paper details the assumptions, decision processes, and conclusions reached during the development and implementation of a Conformance Testing Tool using the JAVA [JAVA] programming language, and the Object Management Group's (OMG's) Common Object

Dynamical Response of a Bose-Einstein Condensate to a Discontinuous Change in Internal State

July 1, 1998
Author(s)
M R. Matthews, D S. Hall, D S. Jin, J R. Ensher, C E. Wieman, Eric A. Cornell, F Dalfovo, C Minniti, S Stringari
A two photon transition is used to rapidly convert an arbitrary fraction of 87Rb atoms from a [F=1, m f=-1>condenstate to the [F=2,n f=2>state. Transferring the entire population imposes a discontinuous change on the condensate's mean-field repulsion

Experimental Demonstration of Some Aspects of LISA Interferometry

July 1, 1998
Author(s)
R T. Giaime, R T. Stebbins, P L. Bender, J E. Faller, J L. Hall
Plans are described to experimentally demonstrate at JILA a possible phase measurement technique for use in LISA interferometry. This demonstration will include use of a compact system for fringe generation and photodetection with realistic beam powers in

Experimental Noise Sources in the NIST Watt Balance

July 1, 1998
Author(s)
Richard L. Steiner, David B. Newell, Edwin R. Williams
The present NIST Watt Balance has a relative combined standard uncertainty of about 145 nW/W. The final results of this phase of the experiment are presented. Improvements in the Type B (nonstatistical) uncertainty contributions, along with several

Extension of Voltage Range for Power and Energy Calibrations

July 1, 1998
Author(s)
O. Petersons, Thomas L. Nelson, Nile M. Oldham, Gerald FitzPatrick
A special purpose ac voltage divider system having voltage ratios of 600 V, 480 V, 360 V, and 240 V to 120 V has been developed to extend the voltage range of primary electric power calibrations from 120 volts to 600 volts at power frequencies of 50 and 60

Fabrication of High-Value Standard Resistors

July 1, 1998
Author(s)
Ronald F. Dziuba, Dean G. Jarrett, L. L. Scott, Andrew J. Secula
The National Institute of Standards and Technology (NIST) has fabricated stable, transportable 10 MΩ} and 1 GΩ} standard resistors for use in an international comparison of high resistances. This fabrication process is being applied to the construction of

Fire Fighting Properties (NISTIR 6191)

July 1, 1998
Author(s)
D W. Stroup, Daniel M. Madrzykowski
Water uses several different mechanisms to suppress and extinguish fires: fuel cooling, flame cooling, oxygen displacement and reduction of radiation feedback to the fuel. Laboratory experiments were conducted to determine which of these mechanisms play

Fourth International Conference on Chemical Kinetics

July 1, 1998
Author(s)
Robert E. Huie, Jeffrey W. Hudgens
The Fourth International Conference on Chemical Kinetics was held July 14-19, 1997, at the National Institute of Standards and Technology in Gaithersburg, MD. The conference was attended by 200 scientists from 21 countries. Topics discussed included small

Glassy Alloys as Potential Bearing Surfaces for Orthopaedic Implants

July 1, 1998
Author(s)
John A. Tesk, C E. Johnson
Glassy (amorphous) metals have some unique properties that may renderthem attractive candidates for the coating of metal-implant bearing surfaces. Metastable glasses of metal alloys, with uniform compositions and homogeous structures that are not

High Efficiency, Dual Collection Mode Near-Field Scanning Optical Microscope

July 1, 1998
Author(s)
Stephan J. Stranick, Lee J. Richter, Richard R. Cavanagh
We have developed a near-field scanning optical microscope that provides simultaneous transmission and reflection mode measurements while concurrently recording a topograph of the sample surface. In this microscope design, an ellipsoidal cavity is used to
Displaying 51751 - 51775 of 73697
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