U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 40826 - 40850 of 74095

Quantifying Uncertainty Towards Information-Centric Unmanned Navigation

August 18, 2003
Author(s)
Rajmohan (. Madhavan, Elena R. Messina
Highly imperfect, inconsistent information and incomplete a priori knowledge introduce uncertainty in sensor-centric unmanned navigation systems. Understanding and quantifying uncertainty yields a measure of useful information that plays a critical role in

Total Radiated Power Limits for Emission Measurements in a Reverberation Chamber

August 18, 2003
Author(s)
Christopher L. Holloway, Perry F. Wilson, Galen H. Koepke, Marco Candidi
In this paper we present a total radiated power limit for emission measurements in reverberation chambers. This total radiation power limit is intended to be equivalent to the FCC maximum E-field limit for emission testing over a ground plane.

Toward a Generic Model for Autonomy Levels for Unmanned Systems (ALFUS)

August 18, 2003
Author(s)
Hui-Min Huang, Elena R. Messina, James S. Albus
Unmanned systems (UMSs) have been deployed to military and civilian operations. UMSs vary widely in their capabilities andcivilian operations. UMSs vary widely in their capabilities and purposes. It would be beneficial to have a set of widely recognized

A Study of In-Tube Evaporation Heat Transfer of Carbon Dioxide

August 17, 2003
Author(s)
N N. Sawant, M Kim, William V. Payne, Piotr A. Domanski, Y W. Hwang
The evaporative heat transfer characteristics of carbon dioxide (CO 2) were measured in a fluid-heated, 8.0 mm ID smooth stainless steel tube. The test apparatus was a concentric tube heat exchanger heated by water in the annulus with CO 2 in the central

Operating Margin Measurements for an AC Josephson Voltage Standard

August 17, 2003
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
For a number of years, NIST has been developing a Josephson arbitrary waveform synthesizer as an ac Josephson Voltage Standard (ACJVS). The effort has primarily focused on increasing the output voltage to practical levels. Recent advances in circuit design

An Approach to Predicting the Location of Moving Objects During On-Road Navigation

August 15, 2003
Author(s)
Craig I. Schlenoff, Rajmohan Madhavan, Stephen B. Balakirsky
For an autonomous vehicle to navigate in real-time within a dynamic environment, it must be able to respond to moving objects. In particular, it must be able to predict, with appropriate levels of confidence, where those objects are expected to be at times

Optical Manipulation of Atoms at the Nanoscale

August 11, 2003
Author(s)
William D. Phillips
These notes are to provide an outline of a lecture presented at the Enrico Fermi Summer School at Nanoscale Science, held in Varenna in July 2000. They are not intended as a complete account of that lecture, but as an indication of the topics covered and a

Erratum: Modeling Detector Response for Neutron Depth Profiling

August 10, 2003
Author(s)
Kevin Coakley, R. G. Downing, George P. Lamaze, H C. Hofsass, C Ronning, J Biegel
In a previous paper, we analyzed the Neutron Depth Profiling energy spectrum collected from a diamond-like carbon (DLC) sample doped with boron. Based on a numerical model for the Detector Response Function (DRF), we estimated a theoretical boron profile

Comparison of Macro-Tip/Tilt & Meso-Scale Position Beam-Steering Transducers for Free-Space Optical Communications Using a Quadrant Photodiode Sensor

August 6, 2003
Author(s)
Jason J. Gorman, Nicholas Dagalakis, K B. Fielhauer, B G. Boone, J R. Bruzzi, Jeffery Kluga
The National Aeronautics and Space Administration (NASA) plans to develop optical communication terminals for future spacecraft, especially in support of high data rate science missions and manned exploration of Mars. Future, very long-range missions, such

IT Security Metrics (ITL Bulletin)

August 4, 2003
Author(s)
Elizabeth B. Lennon
This ITL Bulletin summarizes the recently published NIST Special Publication (SP) 800-55, Security Metrics Guide for Information Technology Systems, by Marianne Swanson, Nadya Bartol, John Sabato, Joan Hash, and Laurie Graffo. NIST SP 800-55 provides

Seedless Superfill: Copper Electrodeposition in Trenches with Ruthenium Barriers

August 4, 2003
Author(s)
Daniel Josell, Daniel Wheeler, C Witt, Thomas P. Moffat
Superconformal filling of fine trenches during electrodeposition of copper is described. Copper electrodeposition was accomplished durectly on a ruthenium layer. The ruthenium layer, as well as a titanium layer to promote adhesion, was evaporated on

Discovery in Hydrating Plaster Using Multiple Machine Learning Methods

August 3, 2003
Author(s)
John G. Hagedorn, J E. Devaney
We apply multiple machine learning methods to obtain concise rules that are highly predictive of scienti cally meaningful classes in hydrating plaster over multiple time periods. We use three dimensional data obtained through X-ray microtomography at

1/f Noise Floor of Solid-State Voltage Standards

August 1, 2003
Author(s)
Yi-hua D. Tang, Thomas J. Witt
To characterize the performance of solid-state voltage standards (Zener standards) the 1/f nature of Zener noise must be considered. At the Bureau International des Poids et Mesures (BIPM) this is done by using the Allan variance to take into account

A 420 MHz Cr:forsterite Femtosecond Ring Laser and Its Use for Continuum Generation in the 1-2 Micron Range

August 1, 2003
Author(s)
I Thomann, A Bartels, Kristan L. Corwin, Nathan R. Newbury, Leo W. Hollberg, Scott Diddams, Jeffrey W. Nicholson, M. F. Yan
We demonstrate a chromium-doped forsterite femtosecond ring laser that generates 30-fs pulses at a 420-MHz repetition rate with nearly 500 mW of average power. The compact solid-state design and broad spectral output make this laser attractive for

A Business-to-Business Interoperability Testbed: An Overview

August 1, 2003
Author(s)
Boonserm Kulvatunyou, Nenad Ivezic, M Martin, Albert T. Jones
In this paper, we describe a business-to-business (B2B) testbed co-sponsored by the Open Applications Group, Inc. (OAGI) and the National Institute of Standard and Technology (NIST) to advance enterprise e-commerce standards. We describe the business and
Displaying 40826 - 40850 of 74095
Was this page helpful?