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 29651 - 29675 of 74047

Fuzzy-Logic-Based Approach for Identifying Objects of Interest in the PRIDE Framework

August 21, 2008
Author(s)
Zeid Kootbally, Craig I. Schlenoff, Rajmohan Madhavan, Sebti Foufou
On-road autonomous navigation of autonomous vehicles requires real--time motion planning in the presence of moving objects. Based on sensed data of moving objects in the environment and the situation it finds itself in, an autonomous vehicle has to plan a

HLPR Chair A Novel Patient Transfer Device

August 21, 2008
Author(s)
Roger V. Bostelman, James S. Albus
In this paper, we briefly describe the design of the Home Lift, Position and Rehabilitation (HLPR) Chair, invented at the National Institute of Standards and Technology (NIST), Manufacturing Engineering Laboratory (MEL) under the Healthcare Mobility

Magnetic order of the iron spins in NdFeAsO

August 21, 2008
Author(s)
Ying Chen, Jeffrey Lynn, Jiying Li, G. J. Li, G. F. Chen, J. L. Luo, N. L. Wang, Pengcheng Dai, Clarnia dela Cruz, H. A. Mook
Polarized and unpolarized neutron diffraction measurements have been carried out to investigate the iron magnetic order in undoped NdOFeAs. Antiferromagnetic order is observed below 141(6) K, which is in close proximity to the structural distortion

Magneto-Optical-Trap-Based, High Brightness Ion Source for Use as a Nanoscale Probe

August 21, 2008
Author(s)
James L. Hanssen, Shannon B. Hill, Jon Orloff, Jabez J. McClelland
We report on the demonstration of a low emittance, high brightness ion source based on magneto-optically trapped neutral atoms. Our source has ion optical properties comparable to or better than those of the commonly used liquid metal ion source. In

Ontological Perspectives for Autonomy Performance

August 21, 2008
Author(s)
Hui-Min Huang, Elena R. Messina, Tsai Hong Hong, Craig I. Schlenoff
Goals must be assigned for any unmanned system’s (UMS) operation before the system’s autonomous performance can be measured. In this paper, we began to construct an ontology for mission goals that could serve as a template for stating the goal. We apply

Performance of Super-Resolution Enhancement for Flash LADAR Data

August 21, 2008
Author(s)
Tsai Hong Hong, Shuowen Hu, S. S. Young
Flash laser detection and ranging (LADAR) systems are increasingly used in robotics applications for autonomous navigation and obstacle avoidance. Their compact size, high frame rate, wide field of view, and low cost are key advantages over traditional

Ultra-low-noise all-fiber photon pair source

August 21, 2008
Author(s)
Shellee D. Dyer, Martin J. Stevens, Burm Baek, Sae Woo Nam
We demonstrate an all-fiber photon pair source with the highest coincidence-to-accidental ratio (CAR) reported to date in the fiber optic telecom C-band.

Measurement science for climate remote sensing

August 20, 2008
Author(s)
Gerald T. Fraser, Steven W. Brown, Raju V. Datla, Bettye C. Johnson, Keith R. Lykke, Joseph P. Rice
The Earth s climate is very complex and highly variable, making it difficult to measure and model small changes that occur over decadal and longer time scales. The resulting uncertainties in measurement and modeling underlie the longterm debate over the

Thermodynamic Property Values for Enzyme-catalyzed Reactions

August 20, 2008
Author(s)
Robert N. Goldberg
This chapter deals with how one can obtain values of thermodynamic properties specifically the apparent equilibrium constant K, the standard molar transformed Gibbs energy change rG, and the standard molar transformed enthalpy change rH for

3D Part Identification Based on Local Shape Descriptors

August 19, 2008
Author(s)
Xiaolan Li, Afzal A. Godil, Asim Wagan
This paper explores 3D object recognition based on local shape descriptor. 3D object recognition is becoming an increasingly important task in modern applications such as computer vision, CAD/CAM, multimedia, molecular biology, robotics, and so on

Hanbury Brown-Twiss interferometry without a beamsplitter

August 19, 2008
Author(s)
Martin J. Stevens, Eric Dauler, Burm Baek, Richard J. Molnar, Scott A. Hamilton, Karl Berggren, Richard P. Mirin, Sae Woo Nam
We demonstrate Hanbury-Brown Twiss interferometry without a beamsplitter, by employing a single-mode optical fiber coupled to a multi-element superconducting nanowire single-photon detector.

Homodyne detection of optical cat states generated by squeezed light photon subtraction

August 19, 2008
Author(s)
Thomas Gerrits, Tracy S. Clement, Scott C. Glancy, Sae Woo Nam, Richard P. Mirin, Emanuel H. Knill
We have experimentally created and measured an optical Schrödinger Cat State. The method relies on single photon subtraction off a squeezed vacuum state and conditioning a homodyne measurement on the detection of that photon.

Map Quality Assessment

August 19, 2008
Author(s)
Asim Wagan, Afzal A. Godil, Xiaolan Li
The Maps captured by robots in real environment are usually incomplete, distorted, and noisy. To evaluate the quality of these kind of maps is an important problem in the field. In this paper we present an algorithm to assess the quality of the map

Recommended List of Common Impurities for Metallic Fixed-point Materials of the ITS-90

August 18, 2008
Author(s)
Dean C. Ripple, Anatoly Pokhodun, Peter Steur, Gregory F. Strouse
Working Group 1 of the Consultative Committee for Thermometry (CCT) has recommended methods for estimating the uncertainties of fixed-point temperatures attributable to chemical impurities [1]. These methods require chemical analysis of all commonly found

Report from the Mise en Pratique Task Group: the next international temperature scale and the mise en pratique for the definition of the kelvin

August 18, 2008
Author(s)
Dean C. Ripple, Bernd Fellmuth, Joachim Fischer, Graham Machin, PPM Steur, Osamu Tamura, Rod D. White
The Consultative Committee for Thermometry has asked Working Group 1 to coordinate a task group formulating an assessment and possible work plan for the next International Temperature Scale and to prepare and maintain the mise en pratique for the

Strategies for Closing the ITRS Funding Gap

August 18, 2008
Author(s)
Yaw S. Obeng, Stephen Knight, Joaquin (. Martinez
For over 35 years, each IC generation has doubled the transistor count while cutting the cost per function in half. This progress, described by Moore's Law, has resulted primarily from scaling device dimensions and wafer size. In reality, the 'Moore's Law'

Wireless Communications in Tunnels for Urban Search and Rescue Robots

August 18, 2008
Author(s)
Catherine A. Remley, George Hough, Galen H. Koepke, Dennis G. Camell, Robert Johnk, Chriss A. Grosvenor
We report on propagation tests carried out in a subterranean tunnel to support improved wireless communications for urban search and rescue robots. We describe single-frequency and ultrawideband channel-characterization tests that we conducted, as well as

Assessing the Uncertainty Associated with Product Emission Measurements

August 17, 2008
Author(s)
Cynthia H. Reed, Steven J. Nabinger, Andrew K. Persily
Volatile organic compounds (VOCs) emitted by building materials and products have been shown to significantly impact human health and comfort. As a result, the market for low emitting building materials and products is growing rapidly. However, existing
Displaying 29651 - 29675 of 74047