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Displaying 43451 - 43475 of 73812

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

Apparatus to Measure Wafer Curvature for Multilayer Systems in a Vacuum Furnace

April 1, 2002
Author(s)
A B. Mann, J Tapson, D van Heerden, A C. Lewis, Daniel Josell, Timothy P. Weihs
A laser-based technique for measuring the curvature of a multilayer/substrate couple is described. Unlike most wafer curvature systems, the instrument described measures the local curvature of the multilayer/substrate couple, correcting for the local

Applications of Morphological Stability Theory

April 1, 2002
Author(s)
Sam R. Coriell, Geoffrey B. McFadden
Recent applications of mormhological stability theory are reviewed. For growth of a binary alloy from the melt, the temperature-dependence of the solute diffusivity can have a significant effect on the critical wavelength at the onset of instability. The

Argon I Lines Produced in a Hollow Cathode Source, 332 nm to 5865 nm

April 1, 2002
Author(s)
W Whaling, W H. Anderson, M T. Carle, J W. Brault, H A. Zarem
We report precision measurements by Fourier transform spectroscopy of the vacuum wavenumber, line width, and relative signal strength of 927 lines in the AR I spectrum. Wavelength in air and classification of the transition are supplied for each line. A

BEES 2.0: Building for Environmental and Economic Sustainability Peer Review Report

April 1, 2002
Author(s)
M A. Curran, J G. Overly, P Hofstetter, R Muller, Barbara C. Lippiatt
This report documents the results of a technical review of the BEES (Building for Environmental and Economic Sustainability) 2.0b software and user manual. BEES measures the life-cycle environmental and economic performance of building products using

Biogenic Contributions to Atmospheric Volatile Organic Compounds in Azusa, California

April 1, 2002
Author(s)
George A. Klouda, C. W. Lewis, D C. Stiles, J L. Marolf, W D. Ellenson, W A. Lonneman
An objective of the 1997 Southern California Ozone Study (SCOS97) was to provide an up-to-date assessment of the importance of biogenic emissions for tropospheric ozone production in the South Coast Air Basin. To this end ambient air samples were collected

Carbon: A Bane for Giant Magnetoresistance Magnetic Multilayers

April 1, 2002
Author(s)
D X. Yang, H D. Chopra, B Shashishekar, P J. Chen, William F. Egelhoff Jr.
This study reports the highly deleterious role of small amount of carbon on the structure and magnetic properties of giant magnetoresistance NiO-Co-Cu-based spin valves. Controlled incorporation of 1-3 atomic % carbon in the Co/Cu layers, resulting in the
Displaying 43451 - 43475 of 73812
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