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Displaying 47876 - 47900 of 74129

Low-Frequency Noise of YBCO/Au Junctions

February 1, 2000
Author(s)
Y Xu, John (Jack) W. Ekin, Cameron C. Clickner
We have fabricated ex-situ C-axis YBCO/au junctions with low contact resistivities.

Measuring Bimodal Crystallographic Texture in Ferroelectric PZT Thin Films

February 1, 2000
Author(s)
Mark D. Vaudin, G R. Fox
A powder x-ray diffraction method has been developed to measure the volume fraction of (111), (100), and randomly oriented PZT in 200 nm thick films used for FRAM applications. The integrated and peak intensities of 100, 110, 200 and 222 Bragg peaks from

Measuring the Orientation and Re-Orientation Dynamics of Single Molecules

February 1, 2000
Author(s)
K D. Weston, Lori S. Goldner
Single molecule fluorescence techniques for the study of macromolecular motion and conformational dynamics are useful for understanding the mechanisms of protein action (i.e., protein catalysts, protein pumps, and motor proteins) and protein folding

Melting Analysis of DNA Dumbbells with Repeating Dinucleotide Stem Sequences Reveals Evidence for Long Range Sequence Dependent Interactions in Short Duplex DNA

February 1, 2000
Author(s)
Peter M. Vallone, R. Owczarzy, P. V. Riccelli, A. S. Benight
Melting Analysis of DNA Dumbbells with Repeating Dinucleotide Stem Sequences Reveals Evidence for Long Range Sequence Dependent Interactions in Short Duplex DNA. Optical and DSC melting studies were performed on 12 DNAdumbbells in 85 mM Na+. The stems of

Modeling Study of Ventilation in Manufactured Houses

February 1, 2000
Author(s)
Andrew K. Persily, S R. Martin
The HUD Manufactured Home Construction and Safety Standards (Part 3280, 1994) contain a number of requirements intended to provide adequate levels of outdoor air to the occupants of manufactured homes. In the implementation of these standards, some

Molecular Simulations of Filled Polymers

February 1, 2000
Author(s)
Francis W. Starr, T B. Schroeder, S C. Glotzer
Fillers are commonly used in industrial applications to alter the properties of polymer materials. However, little is known about the microscopic details of polymer-filler interactions, limiting the development and application of new filled polymers. In

New Approaches to the Development of Fire-Safe Materials (NISTIR 6465)

February 1, 2000
Author(s)
A B. Morgan, Jeffrey W. Gilman, Marc R. Nyden, C L. Jackson
Thermoplastic polyetherimide-clay nanocomposites were synthesized from 1,3-phenylenediamine and bisphenol A dianhydride using an in situ approach. Two types of organically treated clays were utilized to synthesize these nanocomposites. The two organically

New Calcium Tantalate Polytypes in the System Ca 2 Ta 2 O 7 - Sm 2 Ti 2 O 7

February 1, 2000
Author(s)
I E. Grey, Robert S. Roth
New calcium tantalate polytypes, with weberite related structures have been prepared by doping Ca 2Ta 2O 7 with Sm 2Ti 2O 7. Trigonal 6-layer (6T) and monoclinic 5-layer (5M) polytypes containing approximately equal to} 6 mol % and 10 mol % respectively of

Novel Detection Method for DNA Hybridization Based on Molecular Spotlighting

February 1, 2000
Author(s)
T H. Huang, Michael J. Tarlov
A new platform for monitoring hybridization of thiol-derivatized DNA probes (SH-DNA) immobilized on gold surfaces is currently being developed. The gold surface is modified with mixed monolayers of the SH-DNA probes and 6-mercaptohexanol. In fluorescence

Observation of Photons From an Inhibited Spontaneous Emitter

February 1, 2000
Author(s)
D A. Branning, Alan L. Migdall
A fun and timely problem in cavity quantum electrodynamics is the question of whether atoms are actually radiating anything when their spontaneous emission is inhibited by a cavity. Recent theoretical papers have indicated that the answer to this question

Phase Relations of the SrO-Ho 2 O 3 -CuO x System

February 1, 2000
Author(s)
Winnie K. Wong-Ng, J Dillingham, Lawrence P. Cook
The phase diagram of the SrO-R 2O 3-CuOx system, where R=Ho, was investigated in air. The tie-line relationships of this system were determined. Two ternary phases were found, namely, the green phase SrHo 2CuO 5 and the A14-24 solid solution (Sr 14-xHo x

Plasma Charge-Density Ratios in a Dusty Plasma

February 1, 2000
Author(s)
M A. Childs, Alan Gallagher
It is shown that particle diffusion in the afterglow of a dusty plasma can be used to establish several properties of the active plasma. Specifically, the ratio of the average mass of light negative and positive ions, and a limit for the ratio of electron

RF Material Characterization Using a Large-Diameter (76.8 mm) Coaxial Air Line

February 1, 2000
Author(s)
Chriss A. Jones, John H. Grosvenor Jr, Claude Weil
We report the development of a 76.84 mm (3.025 in) diameter coaxial air line system whose purpose is to measure the dielectric and magnetic properties of bulk dielectric and ferrite materials over a frequency range of approximately 0.3 - 1500 MHZ. We

Rotational Spectra of Seven Conformational Isomers of 1-Hexene

February 1, 2000
Author(s)
Gerald T. Fraser, R D. Suenram, C Lugez
The rotational spectra of 7 of the expected 13 conformational isomers of 1-hexene have been measured and assigned at a rotational temperature of 1 symmetry, as verified by the observation of a, b, and c-type electric-dipole transitions. The remaining

Secondary Ferrite Number Reference Materials: Gage Calibration and Assignment of Values

February 1, 2000
Author(s)
Christopher N. McCowan, Thomas A. Siewert, D P. Vigliotti, C M. Wang
Ferrite Numbers (FN) were assigned to blocks of stainless steel that serve as secondary ferrite reference materials (RM 8480 and 8481), and these specimens were placed in our Reference Materials inventory. These reference materials are used to calibrate

Setting the Standards

February 1, 2000
Author(s)
B C. Collins, W G. Leight
This invited article reviews the nature of the pluralistic standards system in the United States and its important relationships to product development, global activities, marketing, and trade. Emphasis is placed on the need to develop a National Standards

Small Particle Growth in Silane Radio-Frequency Discharges

February 1, 2000
Author(s)
M A. Childs, Alan Gallagher
Particle size and number density are measured versus discharge operating time in pure silane, capacitively-coupled RF discharges. Dischargeconditions are those typically used to produce amorphous silicon devices, except the temperature is 300K. Particle
Displaying 47876 - 47900 of 74129