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Search Publications

NIST Authors in Bold

Displaying 43326 - 43350 of 73697

The TREC-2001 Video Track Report

April 18, 2002
Author(s)
Alan Smeaton, Paul D. Over, R Taban
New in TREC-2001 was the Video Track, the goal of which was to promote progress in content-based retrieval from digital video open, metrics-based evaluation. The track built on publicly available video provided by the Open Video Project of the University

New Optical Metrology at NIST for Semiconductor Lithography

April 17, 2002
Author(s)
Ulf Griesmann, Tony L. Schmitz, Johannes A. Soons
Optical semiconductor lithography in the deep ultraviolet (DUV) and next generation lithographies such as extreme ultraviolet lithography (EUVL) create many new challenges for surface figure metrology. We discuss the needs for flatness metrology of silicon

IEEE 802.16 Marks Broadband Wireless Access Maturation

April 15, 2002
Author(s)
Roger Marks
With the completion of the IEEE Standard 802.16 WirelessMAN {trademark} air interface, broadband wireless access (BWA) is reaching maturity as a serious alternative for broadband access deployment. Once the 802.16 amendment is complete, the standard will

Polymerase Chain Reaction Amplification of DNA From Aged Blood Stains: Quantitative Evaluation of the Suitability for Purpose of Four Filter Papers as Archival Media

April 15, 2002
Author(s)
Margaret C. Kline, David L. Duewer, Janette W. Redman, John M. Butler, D A. Boyer
In collaboration with the Armed Forces Institute of Pathology's Department of Defense DNA Registry, the National Institute of Standards and Technology recently evaluated the performance of a short tandem repeat (STR) multiplex with dried whole blood stains

TREC-2001 Interactive Track Report

April 15, 2002
Author(s)
William Hersh, Paul D. Over
In the TREC 2001 Interactive Track six research teams carried out observational studies which increased the realism of the searching by allowing the use of data and search systems/tools publicly accessible via the Internet. To the extent possible

Parallel Cantilever Biaxial Micro-Positioner

April 12, 2002
Author(s)
E Amatucci, Nicholas Dagalakis
The Parallel Cantilever Biaxial Micro-Positioner (PCBMP) has a novel configuration and design in that it has two parallel sets of cantilever beam flexures. This design reduces crosstalk in the X and Y translations and creates motions that are more linear

Thermodynamics of Reactions Catalyzed by PABA Synthase

April 10, 2002
Author(s)
Yadu D. Tewari, P Y. Jensen, N Kishore, M P. Mayhew, J F. Parsons, Edward Eisenstein, Robert N. Goldberg
Microcalorimetry and high performance liquid chromatography (HPLC) have been used to conduct a thermodynamic investigation of reactions catalyzed by PABA synthase, the enzyme located at the first step in the shikimic acid metabolic pathway leading from

Test Structures for Referencing Electronics Linewidth Measurements to Silicon Lattice Parameters Using HRTEM

April 8, 2002
Author(s)
Richard A. Allen, Michael W. Cresswell, Christine E. Murabito, William F. Guthrie, Loren W. Linholm, Colleen E. Hood, E. Hal Bogardus
A technique has been developed to certify the linewidths of the features of a prototype reference materials for the calibration of CD (Critical-Dimension) metrology instruments. The reference features are fabricated in mono-crystalline-silicon with the

A Hierarchical World Model for an Autonomous Scout Vehicle

April 5, 2002
Author(s)
Stephen B. Balakirsky, Tommy Chang, Tsai H. Hong, Elena R. Messina, Michael O. Shneier
This paper describes a world model that combines a variety of sensed inputs and a priori information and is used to generate on-road and off-road autonomous driving behaviors. The system is designed in accordance with the principles of the 4D/RCS

Hierarchical Planning Algorithms

April 5, 2002
Author(s)
Alberto Lacaze
A novel method for communicating commands in hierarchical planning control is presented. This new method can be used to warranty that plans created will be optimal within the defined planning graphs throughout the planning hierarchy. Boundary conditions

Road Detection and Tracking for Autonomous Mobile Robots

April 5, 2002
Author(s)
Tommy Chang, Tsai Hong Hong, Michael O. Shneier, C E. Rasmussen
As part of the Army's Demo III project, a sensor-based system has been developed to identify roads and to enable a mobile robot to drive along them. A ladar sensor, which produces range images, and a color camera are used in conjunction to locate the road

Value-Driven Behavior Generation for an Autonomous Mobile Ground Robot

April 5, 2002
Author(s)
Stephen B. Balakirsky, Alberto Lacaze
In this paper, we will describe a value-driven graph search technique that is capable of generating a rich variety of single and multiple vehicle behaviors. The generation of behaviors depends on cost and benefit computations that may involve terrain

Size-Monodisperse Metal Nanoparticles Via Hydrogen-Free Spray Pyrolysis

April 3, 2002
Author(s)
Jung Hyeun Kim, Thomas A. Germer, George Mulholland, S H. Ehrman
Pure copper nanoparticles were produced using a co-solvent approach avoiding use of hydrogen or other reducing gas. Compared with the particles formed without the co-solvent, the addition of alcohol has a significant effect in preventing oxidation, which

6-Degree of Freedom Tri-Stage Micro Positioner

April 1, 2002
Author(s)
Nicholas G. Dagalakis, E Amatucci
The 6-Degree of Freedom Tri-Stage Micro Positioner (6DFTSMP) can generate high accuracy, small displacement, and high-resolution motions. The moving platform of the device has six degrees (6-D) of freedom motions (translation and rotation about three

A Fermi Gas of Atoms

April 1, 2002
Author(s)
Deborah S. Jin
Cooper pairing of atoms in a gas would provide a new and unique example of a fermionic condensate. However, recent theoretical treatments,by Murray Holland at JILA and by Eddy Timmermans at Los Alamos, have suggested that a superfluid phase transition in

A Knowledge-Navigation System for Dimensional Metrology

April 1, 2002
Author(s)
Howard T. Moncarz
Geometric dimensioning and tolerancing (GD&T) is a method, based on dimensional metrology, to specify a part so that it will meet its design intent. GD&T is difficult to master for two main reasons. First, it is based on complex 3D geometric entities and

A New Approach to Johnson Noise Thermometry using a Josephson Quantized Voltage Source

April 1, 2002
Author(s)
Samuel Benz, John M. Martinis, Sae Woo Nam, Weston L. Tew, David R. White
We describe a new approach to Johnson Noise Thermometry (JNT) that addresses certain limitations found in the conventional approach. The concept takes advantage of recent advances in digital synthesis and signal processing techniques together with advances

Absolute Frequency Measurement of the Iodine-Based Length Standard at 514.67 nm

April 1, 2002
Author(s)
R J. Jones, W Y. Cheng, K W. Holman, L Chen, John L. Hall
The absolute frequency of the length standard at 514.67 mn based on the molecular iodine ( 127/ 2) transition of P(13) 43-0 component a 3 is'measured using a self-referenced femtosecond optical comb. This frequency-based technique yields a measurement
Displaying 43326 - 43350 of 73697
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