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Displaying 34226 - 34250 of 73832

NIST Industrial Control System Security Activities

June 26, 2006
Author(s)
Keith A. Stouffer
The National Institute of Standards and Technology (NIST) has several ongoing efforts to address industrial control system security. This paper will present an overview of two of these efforts, the Process Control Security Requirements Forum (PCSRF) and

Open Source Implementation of the NIST HealthCare Standards Landscape

June 26, 2006
Author(s)
Hai C. Tang, Roy S. Morgan, Thomas R. Rhodes, Clement Ridoret
The NIST HealthCare Standards Landscape (HCSL) web site is a project to develop and demonstrate a web-based repository of information (called "Landscape") on healthcare informatics standards and other related information. Users may navigate the web site

Performance Standards for Urban Search and Rescue Robots

June 26, 2006
Author(s)
Elena R. Messina, Adam S. Jacoff
In this paper, we describe work in performance standards for urban search and rescue (USAR) robots begun in 2004 by the Department of Homeland Security. This program is being coordinated by the National Institute of Standards and Technology and will result

Probe-Based Micro-Scale Manipulation and Assembly Using Force Feedback

June 26, 2006
Author(s)
Jason J. Gorman, Nicholas Dagalakis
Repeatable manipulation and assembly of micro-scale components is a critical capability for future developments in opto-electronics, hybrid microelectromechanical systems, and the integration of nano-scale devices into larger systems. This paper focuses on

Safety Standard Advancement Toward Mobile Robot Use Near Humans

June 26, 2006
Author(s)
Roger V. Bostelman, Tsai H. Hong, Rajmohan (. Madhavan, Tommy Chang
As mobile robots have increasingly improved onboard intelligence, they are being used in more flexible manufacturing, warehouse and/or military environments where humans may intervene and interact with these robots frequently causing increased hazards. The

Towards an Approach for Knowledge-Based Road Detection

June 26, 2006
Author(s)
Mike Foedisch, Craig I. Schlenoff, Michael O. Shneier
Our previous work on road detection suggests the usage of prior knowledge in order to improve performance. In this paper we will explain our motivation for a novel approach, define requirements and point out issues, particularly concerning the

Towards an Approach for Knowledge-based Road Detection

June 26, 2006
Author(s)
Mike Foedisch, M Lochner, D Teumim
Our previous work on road detection suggests the usage of prior knowledge in order to improve performance. In this paper we will explain our motivation for a novel approach, define requirements and point out issues, particularly concerning the

Trajectory Generation for an On-Road Autonomous Vehicle

June 26, 2006
Author(s)
John A. Horst, Anthony J. Barbera
We describe an algorithm that generates a smooth trajectory (position, velocity, and acceleration) for a non-holonomic vehicle autonomously navigating within the constraints of lanes in a road. The technique models both vehicle paths and lane segments as

Using 4D/RCS to Address AI Knowledge Integration

June 26, 2006
Author(s)
Craig I. Schlenoff, James S. Albus, Elena R. Messina, Tony Barbera, Rajmohan (. Madhavan, Stephen B. Balakirsky
In this paper, we show how 4D/RCS incorporates and integrates multiple types of disparate knowledge representation techniques into a common, unifying architecture. 4D/RCS is based on the supposition that different knowledge representation techniques offer

Validating Portability of Step-NC Tool Center Programming

June 26, 2006
Author(s)
Sid Venkatesh, David Odendahl, Xun W. Xu, John L. Michaloski, Frederick M. Proctor, Thomas Kramer
A joint effort between Boeing and the National Institute of Standards and Technology (NIST) was undertaken for validating and evaluating STEP AP238 (STEP-NC) Conformance Class 1 (CC1) for 5-axis machining. STEP-NC is a new manufacturing standard to support

Spectroscopy of atomic and molecular ions using quantum logic

June 25, 2006
Author(s)
Piet Schmidt, Till P. Rosenband, Jeroen Koelemeij, David Hume, Wayne M. Itano, James C. Bergquist, David J. Wineland
Recently developed techniques for quantum computation using trapped ions allow unprecedented coherent control of the internal and external states of single atoms. Here we report how these techniques can be employed to perform precision spectroscopy of

Phase Formation, Crystal Chemistry, and Properties in the Magnetic Dielectric System Bi 2 O 3- Fe 2 O 3- Nb 2 O 5

June 22, 2006
Author(s)
M W. Lufaso, Terrell A. Vanderah, I M. Pazos, Igor Levin, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth
Subsolidus phase relations have been determined for the Bi2O3-Fe2O3-Nb2O5 system in air (900-1075 C). Three new ternary phases were observed Bi3Fe0.5Nb1.5O9 with an Aurivillius-type structure, and two phases with approximate stoichiometries Bi17Fe2Nb31O106

Single Point Optical Calibration of Accelerometers at NIST

June 21, 2006
Author(s)
Beverly F. Payne
Typical accelerometer calibrations by laser interferometer are performed by measuring displacement at three places on the shaker table. Each of these measurements made along the perimeter of the accelerometer require repositioning and realigning of the

Entity Knowledge Model Supporting Intelligent Systems

June 20, 2006
Author(s)
Hui-Min Huang, James S. Albus, Elena R. Messina, Harry A. Scott, Maris Juberts
Intelligent systems operate in uncertain and complex environments. In order to achieve their goals, these systems require rich and updated knowledge about the environment and about their own capabilities to enable proper decision making processes. A

Large-Scale Calculation of Dielectronic Recombination Parameters for Mg-Like Fe

June 20, 2006
Author(s)
I Murakami, T Kato, D Kato, U I. Safronova, T E. Cowan, Yuri Ralchenko
Energy levels, radiative transition probabilities, and autoionization rates for $1s^22s^22p^63l'nl$ ($n$=3-12, $l \le n-1$) and $1s^22s^22p^64l'nl$ ($n$=4-7, $l \le n-1$) states in Mg-like iron (Fe$^14+}$) are calculated by the Hartree-Fock-Relativistic

Natural Linewidth of the 401-nm Laser-Cooling Transition in Er I

June 20, 2006
Author(s)
Jabez J. McClelland
A measurement of the natural linewidth of the 401 nm 4f 126s 2 ( 3H 6) {rarr} 4f 12( 3H)6s6p ( 1P o 1) (6,1) 7 o transition in Er I is presented. Using laser-induced fluorescence in an atomic beam, a linewidth of (36.0 {plus or minus} 1.2) MHz is observed
Displaying 34226 - 34250 of 73832
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