NASA Scientific and Technical Aerospace Reports

calibration system to measure impulsive forces with resolution as low as several nano-Newton-seconds. The behavior of the
impulse balance was thoroughly studied and characterized. A simple analytical model of the balance s motion was developed
from the general equation of motion of an underdamped, harmonically oscillating system. Also, two distinct methods of
analyzing the experimental data from the nanoimpulse balance have been investigated. The first method resolves the total
impulse as a function of the balance’s maximum deflection. The second method enables the determination of the impulse
and/or force applied as a function of time from the balance s time- resolved motion. A calibration scheme employing
electrostatic actuation techniques is used to experimentally validate the model and impulse measurement techniques.
DTIC
Impulses; Time Dependence; Torsion
20040073707 Johns Hopkins Univ., Laurel, MD
Covariance Matrix Filtering for ABF With Moving Interference
Newhall, B. K.; Mar. 2001; 12 pp.; In English; Original contains color illustrations
Contract(s)/Grant(s): F19628-00-C-0002
Report No.(s): AD-A422610; No Copyright; Avail: CASI; A03, Hardcopy
No abstract available
Covariance; Matrices (Mathematics)
20040073728 Michigan Univ., Ann Arbor, MI
A Quantum Computer for Shor’s Algorithm
Bucksbaum, Philip H.; Mar. 20, 2004; 7 pp.; In English
Contract(s)/Grant(s): DAAD19-00-1-0373
Report No.(s): AD-A422644; ARO-40315.2-PH-QC; No Copyright; Avail: CASI; A02, Hardcopy
We employ learning algorithms, optical and terahertz pulse shaping and ultrafast laser techniques to control quantum
coherence in Rydberg atom wave packet quantum data registers. Our goals are to discover efficient ways to limit decoherence
in these systems, execute arbitrary unitary operations and projection operations, and produce and probe quantum
entanglement. Rydberg atoms have many of the same quantum properties of other systems that have been proposed for
processing and storing quantum information, and so they are models for techniques that could be employed in proposed
quantum computers.
DTIC
Algorithms; Computers; Quantum Theory
20040073769 Army Research Lab., Aberdeen Proving Ground, MD
BRL-CAD Tutorial Series: Volume IV Converting Geometry Between BRLCAD and Other Formats
Anderson, John R.; Edwards, Eric W.; May 2004; 54 pp.; In English; Original contains color illustrations
Contract(s)/Grant(s): DAAD17-03-D-001
Report No.(s): AD-A422718; ARL-SR-121; No Copyright; Avail: CASI; A04, Hardcopy
Since 1979, the U.S. Army Research Laboratory has been developing and distributing the BRL-CAD constructive solid
geometry (CSG) modeling package for a wide range of military and industrial applications. The package includes a large
collection of tools and utilities, including an interactive three-dimensional geometry editor, raytracing and generic framebuffer
libraries, network-distributed image- processing and signal-processing capabilities, and an embedded scripting language. As
part of this effort, a multivolume tutorial series is being developed to assist users in the many features of the BRL-CAD
package. Converting Geometry Between BRL-CAD and Other Formats, which is the fourth volume in the series, discusses
pertinent characteristics of the BRL-CAD file format and provides specific instruction on converting to/from various other
modeling file formats. Also discussed are the steps involved in creating a new BRL-CAD converter and postconversion issues.
DTIC
Computer Aided Design; Computer Aided Manufacturing; Education; Format
20040073773 Naval Research Lab., Washington, DC
An Improved Method for Solving Systems of Linear Equations in Frequency Response Problems
Marcus, Martin H.; Apr. 15, 2004; 10 pp.; In English
Report No.(s): AD-A422723; NRL/FR/7130--04-10; 072; No Copyright; Avail: CASI; A02, Hardcopy
Vibration and acoustics problems that require solving matrix equations for many frequencies have solutions that vary very
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