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Search Publications

NIST Authors in Bold

Displaying 10301 - 10325 of 13225

Improvements to the NIST Network Time Protocol Servers

December 5, 2008
Author(s)
Judah Levine
… The National Institute of Standards and Technology operates 22 network time servers at various … locations. These servers respond to requests for time in a number of different formats, and provide time stamps … are directly traceable to the NIST atomic clock ensemble in Boulder. The link between the servers at locations outside …

PTTI Capabilities of the Modernized LORAN System

December 1, 2008
Author(s)
Kirk Montgomery, Michael A. Lombardi
… status and future plans of the modernized LORAN systems in North America, the European Union, Asia, & Saudi Arabia. … Special focus is placed on the enhanced LORAN system in North America and Europe. These modernized systems have … The paper discusses recent technological developments in LORAN time and frequency equipment, at both the …

Security Challenges in Seamless Mobility - How to ``Handover'' the Keys?

November 30, 2008
Author(s)
Katrin Hoeper, Lidong Chen, Antonio Izquierdo Manzanares, Nada T. Golmie
… In this paper, we discuss key management challenges for … such keys. We discuss solutions for intra and inter-technology handovers within the same network and between … handover key hierarchies and key distribution protocols. In addition, we analyze the security performance trade-offs …

User's Guide for the Quality of Design Testing Tool and the Content Checker

November 5, 2008
Author(s)
Katherine C. Morris, Simon P. Frechette, Puja Goyal, Joshua Lubell, Boonserm Kulvatunyou, Salifou Sidi Malick, Nicolas Brayard, Severin Tixier
… were developed at the National Institute of Standards and Technology (NIST) to support people in developing standards for the exchange of data based on the …

An Orthogonal Design of Experiment / Exploratory Data Analysis for Putonium Contaminatian

October 16, 2008
Author(s)
Hiromu Kurosaki, Robert Radford, James J. Filliben, Kenneth G. Inn
… of shellfish at the National Institute of Standards and Technology (NIST). The potential sources of contamination … Ordinarily, over 200 experiments would have been performed in order to isolate the contamination sources for 8 factors. … the sources and interactions of sources of contamination in a timely and cost effective manner. …

MSEL 2003 Programs and Accomplishments: Materials Reliability

October 16, 2008
Author(s)
James A. St Pierre
… past year, as we continue to discover and address critical technology gaps that limit the reliable use of materials. The ability to grow in new directions is a testament to our dedicated staff; demonstrating their willingness to take risks in exploring new areas. Currently, our work spans a wide …

A Pulse-Heated Kolsky Bar Technique for Measuring Flow Stress of Metals at High Loading and Heating Rates

April 5, 2008
Author(s)
Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Timothy J. Burns, D Basak
… The National Institute of Standards and Technology (NIST) has developed an electrical pulse-heated … Under these conditions, which are approaching those found in high speed machining, thermally-activated microstructural … paper describes the NIST pulse-heated Kolsky bar technique in detail, including a thorough assessment of uncertainties …

A Two-Way Josephson Voltage Standard Comparison between NIST and NRC

April 1, 2008
Author(s)
Yi-hua Tang, Barry Wood, Clark Hamilton
… comparison between the National Institute of Standards and Technology (NIST) and the National Research Council (NRC) has … by the NRC JVS. The results of the two comparisons are in agreement to within 0.7 nV and their mean indicates that … of 2.07 nV (k = 2) or relative uncertainty of 2.1 parts in 10^10. …

VAST 2007 Contest - Blue Iguanadon

October 30, 2007
Author(s)
Georges Grinstein, Catherine Plaisant, Theresa O'Connell, Sharon J. Laskowski, Jean Scholtz, Mark Whiting
… competition. The second Visual Analytics Science and Technology (VAST) contest was held in conjunction with the 2007 IEEE (Institute of Electrical and Electronics Engineers) VAST Symposium. In this contest participants were to use visual analytic …

Maze Hypothesis Development in Assessing Robot Performance During Teleoperation

September 28, 2007
Author(s)
Salvatore P. Schipani, Elena R. Messina
… National Institute of Standards and Technology (NIST) personnel had the opportunity to assess 14 … Among the findings, resultant significant differences in completion and decision making times facilitated … based on performance. Also revealed was that errors in navigation and encounters with walls correlated with times …

Study of Test Structures for Use as Reference Material in Optical Critical Dimension Applications

March 22, 2007
Author(s)
Richard A. Allen, Heather Patrick, Michael Bishop, Thomas Germer, Ronald G. Dixson, William Gutherie, Michael W. Cresswell
… dimension (OCD) metrology has rapidly become an important technology in supporting the worldwide semiconductor industry. OCD … measurements on selected prototype reference structures. In addition, SEM CD measurements were made on several of … Study of Test Structures for Use as Reference Material in Optical Critical Dimension Applications …

Does Habituation Affect Fingerprint Quality?

February 20, 2007
Author(s)
Mary F. Theofanos, R J. Michaels, Jean C. Scholtz, Emile L. Morse, Peter May
… Interest in the environmental factors that affect biometric image … as biometric technologies are currently being implemented in various business applications. This study aims to … the absence or presence of instant feedback. A key factor in biometric systems that will be used daily or routinely is …

NIST Intercomparison Program for Organic Contaminants in the Marine Environment: Description and Results of 2005 Organic Intercomparison Exercises

June 1, 2006
Author(s)
Michele M. Schantz, John R. Kucklick, Reenie M. Parris, Dianne L. Poster, Stephen A. Wise
… In support of marine monitoring measurement programs, the National Institute of Standards and Technology (NIST) conducts interlaboratory comparison … the quality and comparability of their performance in measuring selected organic contaminants in environmental …

The Measurement of Optical Frequencies

June 7, 2005
Author(s)
Leo W. Hollberg, Scott A. Diddams, A Bartels, Tara M. Fortier, Kyoungsik Kim
… Even the suggestion of counting optical frequencies in the visible (~ 500 THz) must have seemed ludicrous to many in the past, because traditional methods failed to work above … had the will to try. This feat was finally accomplished in the 1970s and 1980s and resulted in a defined speed of …

NIST time and frequency radio stations: WWV, WWVH, and WWVB

January 1, 2005
Author(s)
Glenn Nelson, Michael A. Lombardi, Windell Oskay
… The National Institute of Standards and Technology (NIST) provides standard time and frequency … millions of customers. The stations, WWV and WWVB, located in Fort Collins, Colorado, and WWVH, located on the island of Kauai in Hawaii, are the only radio stations located in the United …

Improved Radiometry For Extreme-Ultraviolet Lithography

November 1, 2004
Author(s)
Charles S. Tarrio, Robert E. Vest, Steven E. Grantham, K Liu, Thomas B. Lucatorto, Ping-Shine Shaw
… the most accurate method for measurement of radiant power in the extreme ultraviolet. At the National Institute of Standards and Technology, ACR-based measurements are currently used as … however, no radiometric facilities are currently in operation with enough incident power to use an ACR in the …

Bullet Signature Measurements at NIST

January 1, 2003
Author(s)
Jun-Feng Song, Li Ma, Eric P. Whitenton, Theodore V. Vorburger
… development at the National Institute of Standards and Technology 9NIST) to support the coming National Integrated …

Towards a Formal Representation of Driving Behaviors

October 28, 2002
Author(s)
Craig I. Schlenoff, Michael Gruninger
… the applications and infrastructure of information technology are rife with heterogeneity at many levels. This … applying formal ontologies to address the challenges faced in developing and applying autonomous agents for the purpose …
Displaying 10301 - 10325 of 13225
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