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Search Publications

NIST Authors in Bold

Displaying 41326 - 41350 of 73970

Governmental Approaches to Standards in World Trade

April 9, 2003
Author(s)
Roger Marks
Standards have become a critical element in world trade. Within the guidelines set by the World Trade Organization, governments have developed strategies to optimize their benefits with the world standardization system.

Spatial Methods for Event Reconstruction in CLEAN

April 9, 2003
Author(s)
Kevin Coakley, D N. Mckinsey
In CLEAN (Cryogenic Low Energy Astrophysics with Noble gases), a proposed neutrino and dark matter detector, background discrimination is possible if one can determine the location of an event with high accuracy. Here, we develop spatial methods for event

Performance-Based Fire Protection of Historical Structures

April 6, 2003
Author(s)
Richard W. Bukowski, V Nuzzolese, M Bindo
Performance-based fire protection design methods are particularly appropriate for renovation of historical and culturally significant buildings. This is because they allow the freedom to upgrade fire safety while maintaining sensitivity to the significant

Conventional Cells - Monoclinic I-& C-Centered Cells

April 3, 2003
Author(s)
Alan D. Mighell
In the selection of a centered cell in the monoclinic system, it is recommended that the experimentalist select an I-centered cell for those cases in which it is the conventional cell- a and c are coincident with the shortest two translations in the net

Interconnect Fabrication by Superconformal Iodine-Catalyzed Chemical Vapor

April 3, 2003
Author(s)
Daniel Josell, S D. Kim, Daniel Wheeler, Thomas P. Moffat, S G. Pyo
The mechanism behind superconformal filling of fine features during surfactant catalyzed chemical vapor deposition is described and the metrology required to predict it is identified and quantified. The impact of adsorbed iodine coverage on copper

A Model System for Interfacial Reactions in LTCC Materials

April 1, 2003
Author(s)
Lawrence P. Cook, Winnie K. Wong-Ng, Peter K. Schenck, Mark D. Vaudin, J Suh
Over the past decade, ceramic packaging materials have continued to increase in both chemical and structural complexity. At processing temperatures of 800 C to 900 C, the possibilities for interactions at interfaces between dissimilar materials are

A New Octahedral Tilt System in the Perovskite Phase Ca 3 Nb 2 O 8

April 1, 2003
Author(s)
L M. Cranswick, W G. Mumme, I E. Grey, Robert S. Roth, P Bordet
The perovskite-related phase Ca 3Nb 2O 8, when grown as single crystals from a calcium vanadate flux, incorporates a smallamount of vanadium from the flux to form the composition Ca 3Nb 2-xV xO 8 with x = 0.025 . The crystals have pseudo-cubicsymmetry with

A Primary Dead-Weight Tester for Pressures (0.05-1.0) MPa

April 1, 2003
Author(s)
K. Jain, Walter J. Bowers Jr., James W. Schmidt
Recent advances in technology on two fronts, 1) the fabrication of large diameter pistons and cylinders with good geometry, and 2) the ability to measure the dimensions of these components with high accuracy, have allowed dead-weight testers at NIST to

A Statistical Model for Cladding Diameter of Optical Fibers

April 1, 2003
Author(s)
Chih-Ming Wang, Timothy J. Drapela
The National Institute of Standards and Technology has developed a contact micrometer for accurate measurement of optical-fiber outer diameter. The contact micrometer is used to measure reference fibers which are artifacts used by the telecommunications

A statistical model for cladding diameter of optical fibres

April 1, 2003
Author(s)
C. M. Wang, Timothy J. Drapela
The National Institute of Standards and Technology has developed a contact micrometer for accurate measurement of the outer diameter of optical fibres. The contact micrometer is used to measure reference fibres that are artefacts used by the

AC Josephson Voltage Standard Error Measurements and Analysis

April 1, 2003
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
The Josephson arbitrary waveform synthesizer can be used as a precision voltage source for both ac and dc signals. Recent improvements in circuit designs have resulted in output voltages greater than 100 mVrms so that we can investigate ac metrology

Accelerator Aging Effects During Copper Electrodeposition

April 1, 2003
Author(s)
Thomas P. Moffat, B C. Baker, Daniel Wheeler, Daniel Josell
Slow sweep rate voltammetric analysis of the Cu/Cu(II) deposition reaction is shown to be an effective tool for examining aging effects associated with thiol and disulfide additives that are widely employed as brighteners. Sulfonate-terminated short chain

Amphiphobic Carbon Nanotubes as Macroemulsion Surfactants

April 1, 2003
Author(s)
Haonan Wang, Erik K. Hobbie
Single-walled carbon nanotubes (SWNTs) are insoluble in either water or oil. When mixtures of SWNTs, water, and toluene are sheared rigorously, a macroscopic emulsion ofwater droplets form in toluene with SWNTs residing at interfaces between water and

An AC Josephson Source for Johnson Noise Thermometry

April 1, 2003
Author(s)
Samuel Benz, John M. Martinis, Paul Dresselhaus, Sae Woo Nam
We have adapted the Josephson arbitrary waveform synthesizer to create a quantized voltage noise source suitable for calibrating the cross-correlation electronics of a Johnson noise thermometer system. The requirements of long term stability and low

Application of CFD Modeling to Room Fire Growth on Walls.

April 1, 2003
Author(s)
K M. Liang, T Ma, J G. Quintiere, D Rouson
An evaluation of the NIST FDS model was conducted with particular attention for its use in predicting flame spread on surfaces. Over the course of this investigation the computational model changed from combustion depicted by particles to a mixture

Artificial Neural Networks Methods Applied to Conductometric Microhotplate Data for the Identification of the Type and Relative Concentration of Chemical Warfare Agents

April 1, 2003
Author(s)
Zvi Boger, Douglas C. Meier, Richard E. Cavicchi, Stephen Semancik
Response data from microhotplate (MHP) sensor arrays were measured for various chemical warfare (CW) agents at several concentrations. Efficient large-scale artificial neural networks (ANN) modeling has been evaluated as a method for the classification and
Displaying 41326 - 41350 of 73970
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