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NIST Authors in Bold

Displaying 48001 - 48025 of 73830

Superconducting Transition-Edge Bolometer Arrays for Ultra-Low Power Radiometry

May 1, 2000
Author(s)
Erich N. Grossman, James A. Chervenak, Kent D. Irwin, Carl D. Reintsema
A new generation of ultra-low power bolometer arrays is under development for low background infrared astronomy. This paper describes radiometric measurements on such bolometers using a cryogenic blackbody source with accurately calculable throughput

Tele-Metrology and Advanced Ultrasonic Flow Metering (Updated Version)

May 1, 2000
Author(s)
Pedro I. Espina, Tsyh Tyan Yeh, P I. Rothfleisch, S A. Osella
In an effort to expand the range of the national standards, NIST is experimenting with tele-metrology concepts to annex flow calibration facilities throughout the U.S. An essential part of this approach is the use of sensors capable of assessing the

The Infrared Spectrum and Internal Rotation Barrier in HF--BF 3

May 1, 2000
Author(s)
K Nauta, R E. Miller, Gerald T. Fraser, Walter J. Lafferty
The rotationally resolved infrared spectrum of the HF stretch fundamental in combination with one quantum of internal rotationexcitation has been observed for the HF--BF 3 complex using a color-center-laser optothermal molecular-beam spectrometer.This

The TREC-8 Question Answering Track Evaluation

May 1, 2000
Author(s)
Ellen M. Voorhees, D M. Tice
The TREC-8 Question Answering track was the first large-scale evaluation of systems that return answers, as opposed to lists of documents, in response to a question. As a first evaluation, it is important to examine the evaluation methodology itself to

Thermally Induced Deformations in a Flip-Chip HDI Substrate

May 1, 2000
Author(s)
Elizabeth S. Drexler
At issue was the thermomechanical response of microvias in a high-density interconnect (HDI) substrate. The HDI package containing microvias, blind vias, solder bumps, and line traces was thermally cycled five times between -55 and 125 C in a scanning

Thermodynamic Properties of Sulfur Hexafluoride

May 1, 2000
Author(s)
John J. Hurly, Dana R. Defibaugh, Michael R. Moldover
We present new vapor phase speed-of-sound data u(P,T), new Burnett density-pressure-temperature data ρ(P,T), and a few vapor pressure measurements for sulfur hexafluoride (SF 6). The speed-of-sound data spanned the temperature range 230 K {less than or

Tomography of Integrated Circuit Interconnect With an Electromigration Void

May 1, 2000
Author(s)
Zachary H. Levine, A R. Kalukin, M Kuhn, S P. Frigo, I McNulty, C C. Retsch, Y Wang, Uwe Arp, Thomas B. Lucatorto, Bruce D. Ravel, Charles S. Tarrio
An integrated circuit interconnect was subject to accelerated-life conditions to induce an electromigration void. The silicon substrate was removed, leaving only the interconnect encased test structure encased in silica. We imaged the sample with 1750 eV

Ultra-Low Resistance Contacts to GaAs/AlGaAs Quantized Hall Resistors

May 1, 2000
Author(s)
Kevin C. Lee
Contacts to quantized Hall resistors (QHRs) must meet demanding specifications for contact resistance, reliability, ruggedness, and resistance to degradation. A study of contact materials showed that contacts composed primarily of Indium meet all of these

UV Light From the Ground Term of Ti-Like Ytterbium, Tungsten, and Bismuth

May 1, 2000
Author(s)
James V. Porto, John D. Gillaspy
We have used an electron beam ion trap (EBIT) to measure the wavelength of the J=2 to j=3 magnetic dipole transition in the 3d 4 ground term of Ti-like Ytterbium and Tungsten. These results extend the range of measurements of this line along the

Vectorial second-harmonic magneto-optic kerr effect measurement

May 1, 2000
Author(s)
Pavel Kabos, Anthony B. Kos, Thomas J. Silva
A significant modification of an existing experimental technique based on the second-harmonic magneto-optical Kerr effect (SH-MOKE) is introduced. With a p-polarized pumping optical wave incident upon a magnetic film, the transverse component of

An Automated Hierarchical Process Planning System

April 28, 2000
Author(s)
Thomas R. Kramer, Hui-Min Huang, Elena R. Messina, Frederick M. Proctor, Harry A. Scott
This paper describes an automated hierarchical process planning system for machining and inspecting discrete parts in an RCS type control system. The system integrates planning with control of a 3-axis machining center and a coordinate measuring machine

Interfacial Response of a Fluorescent Dye Grafted to Glass

April 12, 2000
Author(s)
Joy P. Dunkers, Jospeh L. Lenahrt, J Van Zanten, Richard~undefined~undefined~undefined~undefined~undefined Parnas
The properties of an epoxy/glass interfacial region are studied by covalently grafting a fluorescent probe to the glass surface. A dimethylaminonitrostilbene fluorophore is tethered to a triethoxysilane-coupling agent, generating a fluorescently labeled

Full-Scale House Fire Experiment for InterFIRE VR, May 6, 1998. Report of Test.

April 10, 2000
Author(s)
Anthony D. Putorti Jr., Jay A. McElroy
A public/private partnership involving multiple federal agencies and private industry was assembled to develop a comprehensive fire investigation training tool. The partnership consisted of the following federal agencies: the Bureau of Alcohol, Tobacco and
Displaying 48001 - 48025 of 73830
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