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Displaying 46826 - 46850 of 73461

In-Flight Measurement of Thermal Spray Particle Temperatures Using Two-Color Optical Pyrometry

October 11, 2000
Author(s)
Frank S. Biancaniello, Steven P. Mates, Stephen D. Ridder, D Basak, D W. Bonnell, Jon C. Geist
Thermal spray is a materials processing technique used to deposit coatings to provide improved wear, corrosion, and/or thermal protection for engineering components. Thick (>10 {micro}m) thermal spray coatings are made up of individual solidified splats

Mastering and Archiving Uncompressed Digital Video Test Materials

October 11, 2000
Author(s)
Charles D. Fenimore
This is a report on the status of a Society of Motion Picture and Television Engineers (SMPTE) Ad Hoc Group charged with creating a master set of images for subjective testing of electronic systems. The images are to be sold at cost by SMPTE for use in the

NCT In-Situ Probes and the MBE Growth of Compound Semiconductors

October 11, 2000
Author(s)
Joseph G. Pellegrino, Jonathan E. Guyer, Donald A. Gajewski
Our research is centered on the use of in-situ measurement probes that monitor semiconductor growth. Our goal is to correlate material parameters observed during growth with device performance. A goal of this presentation is to develop collaborations that

Prokaryotic Expression, Purification, and Reconstitution of Biological Activities (Antiprotease, Antitumor and Heparin-Binding) for Tissue Factor Pathway Inhibitor- 2

October 5, 2000
Author(s)
C N. Rao, Prasad T. Reddy, D J. Reeder, Yonglin Liu, S M. Stack, W Kisiel, D T. Woodley
We report the expression of tissue factor pathway inhibitor-2 (TFPI-2) (also known as PP-5, placental protein-5; MSPI, matrix-associated serine protease inhibitor) in E. coli as a 25 kDa non-glycosylated protein with a glycine substituted for aspartic acid

Driven DNA Transport Into an Asymmetric Nanometer-Scale Pore

October 2, 2000
Author(s)
S. E. Henrickson, Martin Misakian, B Robertson, John J. Kasianowicz
To understand the mechanism by which individual DNA molecules partition into a nanometer-scale pore, we studied the concentration and voltage dependence of polynucleotide-induced current blockades of single a-hemolysin ionic channels. At fixed single

A Denial-of-Service Resistant Intrusion Detection Architecture

October 1, 2000
Author(s)
Peter M. Mell, D G. Marks, Mark McLarnon
As the capabilities of intrusion detection systems (IDS) advance, attackers may attempt to disable an organization's IDS before attempting to penetrate more valuable targets. As IDSs evolve into distributed systems withinterdependent components, they are

Accuracy Comparison of Absolute Optical Frequency Measurement Between Harmonic-Generation Synthesis and a Frequency-Division Femtosecond Comb

October 1, 2000
Author(s)
J Ye, T H. Yoon, John L. Hall, A A. Madej, J E. Bernard, K J. Siemsen, L Marmet
Using an iodine-stabilized He-Ne laser as a transfer oscillator, we compare absolute measurements of the optical frequency from a traditional frequency synthesis chain based on harmonic generation and from the frequency division technique of an ultrawide

Accurate Electrical Measurement of Coupled Lines on Lossy Silicon

October 1, 2000
Author(s)
Uwe Arz, Dylan F. Williams, Dave K. Walker, Hartmut Grabinski
In this paper we apply a measurement method designed for asymmetric coupled lines to determine the broadband propagation characteristics of symmetric coupled lines fabricated on a highly conductive silicon substrate. We show that the matrices of frequency

Amphibole Asbestos From Libby, Montana: Aspects of Nomenclature

October 1, 2000
Author(s)
A G. Wylie, Jennifer R. Verkouteren
Richterite-asbestos and winchite-asbestos are not listed in the Federal regulations governing asbestos. However, asbestiform winchite is found in the gangue at the Libby, Montana, vermiculite deposit, where asbestos-related diseases have been reported

An AC/DC Technique for the Absolute Integrating-Sphere Method

October 1, 2000
Author(s)
Yoshihiro Ohno, R Kohler, M F. Stock
The Bureau International des Poids et Mesures (BIPM) has historically maintained the results of international intercomparisons of luminous intensity and luminous flux as so-called world-mean values in the form of groups of lamps for more than 60 years. It

Angle-Dependent Absolute Infrared Reflectance and Transmittance Measurements

October 1, 2000
Author(s)
Simon G. Kaplan, Leonard M. Hanssen
A goniometric system is used in conjuction with an FT-IR (Fourier-Transform Infrared) spectrophotometer to perform reflectance and transmittance measurements as a function of angle of incidence from 12 to 80 . The input beam is polarized using a high

Antenna Range Imaging

October 1, 2000
Author(s)
Ronald C. Wittmann, Michael H. Francis
We present a preliminary evaluation of a microwave measurement system that has been designed to determine electromagnetic fields in the quiet-zone of an antenna measurement range and to produce an image of the sources, intended and unintended, of the

BLCC-NIST Building Life-Cycle Cost Program, Version 5.0

October 1, 2000
Author(s)
S Fuller, A Boyles, Bruce R. Miller
The BLCC5 Building Life-Cycle Cost Program provides economic analysis of projects for which both initial capital costs and future operational costs need to be considered. The program is useful for evaluating the long-term costs and savings of energy and

Chain Dimensions in Polysilicate-Filled Poly(Dimethyl Siloxane)

October 1, 2000
Author(s)
A Nakatani, W Chen, R G. Schmidt, G V. Gordon, Charles C. Han
We present experimental results on the single chain dimensions of isotopic blends (both mismatched and matched molecular masses) of poly(dimethyl siloxane) (PDMS) containing trimethylsilyl-treated polysilicate particles (fillers) and compare these results

Chemical Imaging With Scanning Near-Field Infrared Microscopy and Spectroscopy

October 1, 2000
Author(s)
Chris A. Michaels, Lee J. Richter, Richard R. Cavanagh, Stephan J. Stranick
The development of a scanning near-field microscope that utilizes infrared absorption as the optical contrast mechanism is described. This instrument couples the nanoscale spatial resolution of a scanning probe microscope with the chemical specificity of

Coding and Modulation for LMDS and Analysis of the LMDS Channel

October 1, 2000
Author(s)
J E. Hakegard
During the last two to three years, there has been considerable activity aimed towards deploying broadband wireless access systems. The U. S. Local Multipoint Distribution Services (LMDS) auctions in February-March 1998 of 1.3 GHz of spectrum between 27.5

Cold Collision Frequency Shifts in a 87 Rb Atomic Fountain

October 1, 2000
Author(s)
Y Sortais, S Bize, C Nicolas, A Clairon, C Salomon, C Williams
We present measurements of cavity frequency pulling and collisional frequency shifts in a 87Rb fountain with a frequency resolution of 3 x 10 -16. Agreement with theory is found for the cavity pulling and the measured collisional shifts. The clock shift is

Color Issues of White LEDs

October 1, 2000
Author(s)
Yoshihiro Ohno
For white LEDs to be used for general lighting, they should have appropriate white color and good color rendering performance for illuminated objects. Color rendering, as well as energy efficiency (efficacy), have been the two most important criteria for
Displaying 46826 - 46850 of 73461
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