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 32126 - 32150 of 74129

Once is Enough in Radiometric Calibrations

February 1, 2007
Author(s)
Gerald T. Fraser, Charles E. Gibson, Howard W. Yoon, Albert C. Parr
The successful development of an Optical Technology Division quality system for optical radiation measurement services has provided the opportunity to reconsider the existing calibration procedures to improve quality and reduce costs. We have instituted

Scanning Advanced Automobile Technology

January 31, 2007
Author(s)
Hamid Gharavi, K V. Prasad, P. Ioannou
The progress of some of the key electrical, electronics, communications, controls and software technologies that enable in-vehicle, vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) functions is presented, in historical, current & futuristic

Temperature-Controlled Depth Profiling in Poly (methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS) II. An Investigation of Sputter-Induced Topography, Chemical Damage and Depolymerization Effects

February 1, 2007
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen, Chang Xu, James Batteas
Secondary Ion Mass Spectrometry (SIMS) employing an SF polyatomic primary ion source was used to depth profile Poly(methyl methacrylate) (PMMA) at a series of temperatures from -75 C to 125 C where the primary glass transition for PMMA occurs at 105 C. The

Temperature-Controlled Depth Profiling in Poly(methylmethacrylate) (PMMA) Using Cluster Secondary Ion Mass Spectrometry (SIMS): I. Investigation of Depth Profile Characteristics

February 1, 2007
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen
Secondary Ion Mass Spectrometry (SIMS) employing an SF5+ polyatomic primary ion source was used to depth profile Poly(methyl methacrylate) (PMMA) at a series of temperatures from -75 oC to 125 oC, where the primary glass transition for PMMA occurs at 105

TheoH and Allan Deviation as Power-Law Noise Estimators

February 1, 2007
Author(s)
Jennifer A. Taylor, David A. Howe
A spectral interpretation using the frequency response of the Allan Variance is used to determine slopes of f α noise, commonly called ''power-law noise.'' This paper shows that TheoH provides significantly better determination of f α noise slopes at long

Thermophysical Properties Measurements and Models for Rocket Propellant RP-1: Phase I

February 1, 2007
Author(s)
Joe W. Magee, Thomas J. Bruno, Daniel G. Friend, Marcia L. Huber, Arno D. Laesecke, Eric Lemmon, Mark O. McLinden, Richard A. Perkins, J?rg Baranski, Jason A. Widegren
Accurate knowledge of thermophysical properties is a prerequisite to design efficient and cost-effective rocket engine systems that use the kerosene rocket propellant designated RP-1. A robust properties model that is based on reliable experimental

Characterization and Control of Lipid Layer Fluidity in Hybrid Bilayer Membranes

January 31, 2007
Author(s)
Neil A. Anderson, Lee J. Richter, John C. Stephenson, Kimberly A. Briggman
The main gel-to-liquid-crystal (LC) phase transition temperature, Tm, of the distal lipid layer in hybrid bilayer membranes (HBMs) under water was investigated using vibrational sum frequency spectroscopy (VSFS). VSFS has unique sensitivity to order

Mapping Mechanical Properties on the Nanoscale with Atomic Force Acoustic Microscopy

January 31, 2007
Author(s)
Donna C. Hurley, Malgorzata Kopycinska-Mueller, Tony B. Kos
We are developing tools that use the atomic force microscope (AFM) to measure mechanical properties with nanoscale spatial resolution. Contact-resonance-spectroscopy techniques such as atomic force acoustic microscopy (AFAM) involve the vibrational modes

Performance Analysis of Symbolic Road Recognition for On-Road Driving

January 31, 2007
Author(s)
Mike Foedisch, Craig I. Schlenoff, Rajmohan Madhavan
Previous approaches to road sensing, namely road detection were based on segmenting the sensor data, i.e. color camera image, into road and non-road areas. Performance evaluation for such algorithms could be performed in a relatively straightforward

Performance Evaluation of Integrated Vehicle-Based Safety Systems

January 31, 2007
Author(s)
Jack J. Ference, Sandor S. Szabo, Wassim G. Najm
This paper describes a program to develop and test an integrated crash warning system that addresses rear-end, lane change, and roadway departure crashes for passenger cars and heavy commercial trucks. One of the goals of this program is to facilitate the

Technology Evaluations and Performance Metrics for Soldier-Worn Sensors for ASSIST

January 31, 2007
Author(s)
Brian Weiss, Craig I. Schlenoff, Michael O. Shneier, Ann Virts
The DARPA-funded Advanced Soldier Sensor Information Systems and Technology (ASSIST) project is aimed at developing soldier-worn sensors to increase a soldier s battlefield awareness during humanitarian and combat missions, provide them with data

Traversability Metrics for Urban Search and Rescue Robots on Rough Terrain

January 31, 2007
Author(s)
V Molino, Rajmohan Madhavan, Elena R. Messina, Anthony J. Downs, Adam S. Jacoff, Stephen B. Balakirsky
Rough terrain, such as the rubble that we would expect to find in urban disaster areas, will likely impede robot mobility. The goal of this paper is to find methods for quantifying the difficulty a robot should encounter traversing a region of rough

A Physics Based Approach to Modeling Grassland Fires

January 30, 2007
Author(s)
William E. Mell, M A. Jenkins, J Gould, P Cheney
Physics based coupled fire-atmosphere models are based on approximations to the governing equations of fluid dynamics, combustion, and the thermal degradation of solid fuel. They require significantly more computational resources than the most commonly
Displaying 32126 - 32150 of 74129