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Displaying 34451 - 34475 of 73994

Chip-Scale Atomic Devices

June 4, 2006
Author(s)
John E. Kitching, Svenja A. Knappe, P Schwindt, Ying-ju Wang, Hugh Robinson, Leo W. Hollberg, Li-Anne Liew, John Moreland, Alan Brannon, J Breitbarth, Brad Lindseth, Z Popovic, V Shah, Vladislav Gerginov, Matt Eardley
We present an overview of recent work to develop chip-scale atomic devices such as frequency references and magnetometers. These devices take advantage of advances over the last ten years in the fields of micro electro mechanical systems (MEMS), precision

100 mV AC-DC Transfer Standard Measurements Using An AC Josephson Voltage Standard

June 1, 2006
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
NIST is implementing the Josephson arbitrary waveform synthesizer as an ac Josephson Voltage Standard (ACJVS). Over the past few years we have demonstrated precision measurements of synthesized sine waves at rms voltage amplitudes up to 170 mV. The system

A Web Service-Based Reconfigurable Testbed for Business-to-Business (B2B) Integration

June 1, 2006
Author(s)
B Jeong, Jungyub Woo, Hyunbo Cho, Boonserm Kulvatunyou, James Lee
Several types of standards and corresponding software solutions have been created to enable business-to-business (B2B) integration. Testing for conformance and interoperability among these solutions are inter-dependent. This signifies the needs to make

Comparison of AM Noise in Commercial Amplifiers and Oscillators at X-Band

June 1, 2006
Author(s)
Archita Hati, David A. Howe, Craig W. Nelson
In this paper we discuss the importance of amplitude-modulated (AM) noise. AM noise is often neglected and considered a s a minor problem. However, AM noise can become very important in high performance systems that require ultra-low phase-modultaed (PM)

Critical Nucleus Phase Diagram for the Cu(100) Surface

June 1, 2006
Author(s)
Joshua M. Pomeroy, Joel D. Brock
An experimental exploration of island nucleation dynamics during epitaxial film growth on the Cu(100) surface is presented that connects previous results from other groups at low temperatures with the room temperature regime. The steady-state balance of

Enzyme Activity to Augment the Characterization of Tethered Bilayer Membranes

June 1, 2006
Author(s)
Gintaras Valincius, Duncan J. McGillivray, W. Febo-Ayala, David J. Vanderah, John J. Kasianowicz, Mathias Losche
The structural order of tethered lipid bilayers (tBLMs) on solid substrates, investigated with electrochemical impedance spectroscopy (EIS) and neutron reflectivity (NR), is further characterized by phospholipase activity. Whereas EIS and NR data indicate

Implementing XML Schema Naming and Design Rules

June 1, 2006
Author(s)
Joshua Lubell, Boonserm Kulvatunyou, Katherine C. Morris, Betty Harvey
We are building a methodology and tool kit for encoding XML schema Naming and Design Rules (NDRs) in a computer-interpretable fashion, enabling automated rule enforcement and improving schema quality. Through our experience implementing rules from various

Magnetometry with millimeter-scale anti-relaxation-coated alkali-metal vapor cells

June 1, 2006
Author(s)
M V. Balabas, D Budker, John E. Kitching, P Schwindt, Jason Stalnaker
Dynamic nonlinear magneto-optical-rotation signals with frequency- and amplitude-modulated laser light have been observed and investigated with a spherical glass cell of 3-mm diameter containing Cs metal with inner walls coated with para?n. Intrinsic

New Collaboration Methods for Laboratory Liaisons

June 1, 2006
Author(s)
Nancy Allmang, Mylene S. Ouimette, Lea Wade
Three years ago the Information Services Division of the National Institute of Standards and Technology (NIST) initiated a library-laboratory liaison program. In the programs early years the liaisons performed in-depth research and analyses, worked with

NIST Inter-Comparison Exercise Program for Polybrominated Diphenyl Ethers (PBDEs) in Marine Sediment: Description and Results of the 2004 Intercomparison Exercise

June 1, 2006
Author(s)
H M. Stapleton, Jennifer M. Lynch, Michele M. Schantz, John R. Kucklick, Stephen A. Wise
In support of environmental monitoring measurement programs, the National Institute of Standards and Technology (NIST) conducts inter-laboratory comparison exercises to provide one mechanism for participating laboratories/monitoring programs to evaluate

NIST Intercomparison Program for Organic Contaminants in the Marine Environment: Description and Results of 2005 Organic Intercomparison Exercises

June 1, 2006
Author(s)
Michele M. Schantz, John R. Kucklick, Reenie M. Parris, Dianne L. Poster, Stephen A. Wise
In support of marine monitoring measurement programs, the National Institute of Standards and Technology (NIST) conducts interlaboratory comparison exercises to provide one mechanism for participating laboratories/monitoring programs to evaluate the

NIST Station Nightclub Fire Investigation: Physical Simulation of the Fire

June 1, 2006
Author(s)
Daniel M. Madrzykowski, Nelson P. Bryner, Stephen Kerber
A fire occurred on the night of February 20, 2003, at The Station Nightclub located in West Warwick, Rhode Island. A band that was performing that night, during its performance, used pyrotechnics that ignited foam insulation lining the walls and part of
Displaying 34451 - 34475 of 73994
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