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Making Macroscopic Assemblies of Aligned Carbon Nanotubes

Nanotubes are aligned and manipulated with the help of magnetic and/or electric fields. A method of aligning and assembling single-wall carbon nanotubes (SWNTs) to fabricate macroscopic structures has been invented. The method entails suspending SWNTs in a fluid, orienting the SWNTs by use of a magnetic and/or electric field, and then removing the aligned SWNTs from suspension in such a way as to assemble them while maintaining the alignment.

Posted in: Materials, Briefs

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Decision Support for Emergency Operations Centers

The Flood Disaster Mitigation Decision Support System (DSS) is a computerized information system that allows regional emergency-operations government officials to make decisions regarding the dispatch of resources in response to flooding.

Posted in: Information Sciences, Briefs

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NASA Records Database

The NASA Records Database, comprising a Web-based application program and a database, is used to administer an archive of paper records at Stennis Space Center. The system begins with an electronic form, into which a user enters information about records that the user is sending to the archive.

Posted in: Information Sciences, Briefs

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Real-Time Principal-Component Analysis

A recently written computer program implements dominant-element-based gradient descent and dynamic initial learning rate (DOGEDYN), which was described in “Method of Real-Time Principal-Component Analysis” (NPO-40034) NASA Tech Briefs, Vol. 29, No. 1 (January 2005), page 59.

Posted in: Information Sciences, Briefs, TSP

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Fuzzy/Neural Software Estimates Costs of Rocket-Engine Tests

The Highly Accurate Cost Estimating Model (HACEM) is a software system for estimating the costs of testing rocket engines and components at Stennis Space Center.

Posted in: Information Sciences, Briefs

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Adaptive Filtering Using Recurrent Neural Networks

Precise system models are not needed for state filtering.

Posted in: Information Sciences, Briefs

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Applying Standard Interfaces to a Process-Control Language

 A method of applying open-operating-system standard interfaces to the NASA User Interface Language (UIL) has been devised.

Posted in: Information Sciences, Briefs

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