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Search Publications

NIST Authors in Bold

Displaying 31751 - 31775 of 73929

Developing an Interpretability Scale for Motion Imagery

November 27, 2007
Author(s)
J Irvine, A Aviles, D Cannon, Charles D. Fenimore, Donna Haverkamp, S Israel, G O'Brien, John W. Roberts
The motion imagery community would benefit from the availability of standard measures for assessing image interpretability. The National Imagery Interpretability Rating Scale (NIIRS) has served as a community standard for still imagery, but no comparable

Evolution of Modern Approaches to Express Uncertainty in Measurement

November 27, 2007
Author(s)
Raghu N. Kacker, K D. Sommer, Bernd Siebert
The object of this paper is to discuss evolution of the concept of uncertainty in measurement and methods for its quantification from the classical error analysis to the modern approaches based on the Guide to the Expression of Uncertainty in Measurement

Long-term Stability of Remote Clock Comparisons with IGS Clock Products

November 27, 2007
Author(s)
Victor S. Zhang, Thomas E. Parker, Marc A. Weiss
The International GNSS Service (IGS) clock products contain clock information of the local reference for the IGS tracking receivers with respect to the IGS time. The clock information is obtained from GPS carrier-phase measurements. Many timing

Magnetic Levitation System for the Dissemination of a Non-Artifact Based Kilogram

November 27, 2007
Author(s)
Zeina J. Kubarych, Patrick J. Abbott, Edwin R. Williams, Ruimin Liu, Vincent J. Lee
We describe a new approach to directly link air and vacuum mass measurements. This approach uses magnetic levitation along with vacuum and balance technology to realize vacuum mass measurements. It provides direct traceability to the International

Overview of the TREC 2006 Blog Track

November 27, 2007
Author(s)
Iadh Ounis, Maarten de Rijke, Craig Macdonald, Gilad Mishne, Ian Soboroff
The Blog track began this year, with the aim to explore the information seeking behaviour in the blogosphere. For this purpose, a new large-scale test collection, namely the TREC Blog06 collection, has been created. In the first pilot run of the track in

Standard Time and Frequency Dissemination via Eqyptian Digital Satellite

November 27, 2007
Author(s)
John P. Lowe, Jason Heidecker, Mohamed A. Swidan, Ahmed Hisham, Safaa Samuel
The Egyptian Satellite Company and the National Institute for Standards (NIS) in Egypt, with technical assistance from the National Institute of Standards and Technology (NIST) in the United States, are collaborating to broadcast frequency and time

Statistical Analysis of 4 MN Force Range Key Comparison

November 27, 2007
Author(s)
Thomas W. Bartel
The factors contributing to the uncertainty are discussed for the measurements that were conducted for the 2 MN and 4MN force values of the very high force CIPM key comparison. Details of the statistical analysis by the pilot institute, NIST, are provided

Sub-Doppler Laser Cooling and Magnetic Trapping of Erbium

November 27, 2007
Author(s)
Andrew J. Berglund, Simone Lee, Jabez J. McClelland
We investigate cooling mechanisms in magneto-optically and magnetically trapped erbium. We find efficient sub-Doppler cooling in our trap, which can persist even in large magnetic fields due to the near degeneracy of two Lande g factors. Furthermore, a

Closed Loop CNC Manufacturing -- Connecting the CNC to the Enterprise

November 26, 2007
Author(s)
Sid Venkatesh, Rich Morihara, John L. Michaloski, Frederick M. Proctor
Closed Loop manufacturing describes the use of feedback from a Computer Numerical Control (CNC) to the Enterprise Resource Planning (ERP) to help in business operations. Although conceptually simple, many obstacles make CNC-ERP connectivity difficult -

Fluorescence during Doppler cooling of a single trapped atom

November 26, 2007
Author(s)
Janus Wesenberg, Dietrich G. Leibfried, Brad R. Blakestad, Joseph W. Britton, Ryan Epstein, Jonathan Home, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, R. Ozeri, Signe Seidelin, David J. Wineland
We investigate the temporal dynamics of Doppler cooling of a single trapped atom in the weak binding regime using a semi-classical model. We develop an analytical model for the simplest case of a single vibrational mode for a harmonic trap, and show how

Overview of TREC 2006

November 26, 2007
Author(s)
Ellen M. Voorhees
This report provides an overview of the fifteenth Text REtrieval Conference, TREC 2006. TREC 2006 was held at NIST on November 16-19, 2006. The conference was cosponsored by NIST and the Disruptive Technology Office (DTO). The conference attracted 107

TREC: Continuing Information Retrieval's Tradition of Experimentation

November 26, 2007
Author(s)
Ellen M. Voorhees
This article provides a high-level overview of the history, results and impact of NIST's Text REtrieval Conference (TREC). The article will appear in a special issue of the Communications of the ACM devoted to experimentation in computer science.

Using Storage Encryption Technologies to Protect End User Devices

November 26, 2007
Author(s)
Shirley M. Radack
This bulletin summarizes the guidance developed by NIST and published in SP 800-111 to help organizations secure their end user devices, and deter unauthorized parties from accessing the stored information. The bulletin explains three classes of storage

Decentralized Trust Domain Management in Multiple Grid Environments

November 25, 2007
Author(s)
Chung Tong Hu, Karen A. Scarfone, David F. Ferraiolo
Trust domain management for the global access of a grid is managed under centralized schema for most of the current grid architectures, which are designed based on the concept that there is only one grid for every grid member, therefore requiring central

Nanomechanical Mapping with Resonance Tracking Scanned Probe Microscope

November 23, 2007
Author(s)
Anthony B. Kos, Donna C. Hurley
We present a new digital-signal-processor-based resonance tracking system for scanned probe microscopy (SPM) imaging. The system was developed to enable quantitative imaging of mechanical properties with nanoscale spatial resolution at practical data

Quantifying the Surface Coverage of Conjugate Moleucles on Functionalized Nanoparticles

November 22, 2007
Author(s)
Leonard F. Pease III, De-Hao D. Tsai, Rebecca A. Zangmeister, M Zachariah, Michael J. Tarlov
Electrospray-differential mobility analysis (ES-DMA) represents an attractive tool to determine directly the coverage and conformation of long, flexible molecules on engineered nanoparticles. For example, nanoparticles coated with single-stranded DNA

Test Sequence Generation for Integration Testing of Component Software

November 22, 2007
Author(s)
Leonard J. Gallagher, Jeff Offutt
Ensuring high object interoperability is a goal of integration testing for object-oriented software. When messages are sent, receiving objects should respond as intended. Ensuring this is especially difficult when software uses components that are
Displaying 31751 - 31775 of 73929
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