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NIST Authors in Bold

Displaying 43426 - 43450 of 74303

Performance Evaluation of Autonomous Mobile Robots

February 1, 2002
Author(s)
Adam S. Jacoff, Elena R. Messina, John Evans
The National Institute of Standards and Technology (NIST) has initiated a program to develop quantitative metrics for machine intelligence. One of the possible approaches to evaluating machine intelligence is task-based performance testing, like a mouse in

Pilot-Assisted 16-Level QAM for Wireless Video

February 1, 2002
Author(s)
Hamid Gharavi
This paper presents a twin-class transmission system for narrowband radio access channels suitable for handheld video phone and multimedia portable PC applications. The transmission system is comprised of a hierarchical 16-QAM modulation technique and a

Quantum Logic for Trapped Atoms Via Molecular Hyperfine Interactions

February 1, 2002
Author(s)
G K. Brennen, I H. Deutsch, Carl J. Williams
We study the deterministic entanglement of a pair of neutral atoms trapped in an optical lattice by coupling to excited-state molecular hyperfine potentials. Information can be encoded in the ground-state hyperfine levels and processed by bringing atoms

SCUBA-2: Application of LTD Technology

February 1, 2002
Author(s)
William Duncan, Wayne Holland, Damian Audley, D R. Kelly, Tully Peacock, Peter Hastings, Michael MacIntosh, Kent D. Irwin, Sae Woo Nam, Gene C. Hilton, Steven Deiker, Anthony Walton, Alan Gundlach, William Parkes, Camilla Dunare, Peter Ade, Ian Robson
We outline the need for SCUBA 2, its goals and specifications. We give reasons for the choice of the low temperature detector technology of TES arrays and SQUID multiplexers and describe our pixel and array architecture and progress on the project to date.

Sol-Gel Materials for Gas Phase Sensing Using Microhotplate Arrays

February 1, 2002
Author(s)
N O. Savage, Richard E. Cavicchi, Michael J. Tarlov, Stephen Semancik, J Greg Gillen
Sol-gel chemistry is used to create suspensions (sols) of small particles of materials such as metal oxides. These suspensions can be dried to a gel or powder or used in the sol form for coatings and thin films. One promising application of sol-gel derived

Stray Light Characterization for MOBY

February 1, 2002
Author(s)
Bettye C. Johnson, Steven W. Brown, Keith R. Lykke, M Feinholz, M Yarbrough, S Flora, D K. Clark
The Marine Optical Spectrograpli (MOS) system is used as a down-welling irradiance and up-welling in-water radiance profiler in two configurations: as the sensor for the Marine Optical Buoy (MOBY) and as a mobile, sliipboard-deployable sensor. Both systems

Stream Tables

February 1, 2002
Author(s)
Allan Harvey
This article explains steam tables at an introductory technical level. After some historical meterial on the development of steam tables and their international standardization, the current standrds as adopted by the International Association for the

Structure of Escherichia Coli Aminodeoxychorismate Synthase: Architectural Conservation and Diversity in Chorismate-Utilizing Enzymes

February 1, 2002
Author(s)
J F. Parsons, P Y. Jensen, A S. Pachikara, A J. Howard, Edward Eisenstein, Jane E. Ladner
Aminodeoxychorismate synthase is part of a heterodimeric complex that catalyzes the two-step biosynthesis of 4-amino-4-deoxychorismate, a precursor of p-aminobenzoate and folate in microorganisms. In the first step, a glutamine amidotransferase encoded by

The NIST Electron Effective-Attenuation-Length Database

February 1, 2002
Author(s)
Cedric J. Powell, Aleksander Jablonski
The NIST Electron Effective-Attenuation-Length Database provides values of electron effective attenuation lengths (EALs) in solid elements and compounds at selected electron energies between 50 eV and 2,000 eV. The database was designed mainly to provide

The Validation of Fourier-Transform Microwave Spectroscopy for Trace-Gas Analysis

February 1, 2002
Author(s)
Pamela M. Chu, R D. Suenram, Angela R. Hight Walker, R S. DaBell, George C. Rhoderick, Gerald T. Fraser
There is strong interest by regulatory agencies and automobile manufacturers, motivated in large part by increasingly stringent emission standards, for measurement tools capable of quantifying various hydrocarbons, oxygenated hydrocarbons, etc., in

Time-Division SQUID Multiplexers

February 1, 2002
Author(s)
Kent D. Irwin, Leila R. Vale, Norman F. Bergren, Steven Deiker, Erich N. Grossman, Gene C. Hilton, John M. Martinis, Sae Woo Nam, Carl D. Reintsema, David A. Rudman, Martin Huber
SQUID multiplexers (MUX) make is possible to build arrays of thousands of low-temperature bolometers and microcalorimeters based on superconducting transition-edge sensors (TES) with a manageable number of readout channels. We discuss the technical

Topic Detection and Tracking Evaluation Overview

February 1, 2002
Author(s)
Jonathan G. Fiscus, G R. Doddington
The objective of the Topic Detection and Tracking (TDT) program is to develop technologies that search, organize and structure multilingual, news oriented textual materials from a variety of broadcast news media. This research program uses controlled
Displaying 43426 - 43450 of 74303