Tech Briefs

Fuzzy Logic Engine

The Fuzzy Logic Engine is a software package that enables users to embed fuzzy-logic modules into their application programs.

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Telephone-Directory Program

eDirectory is a computer program that makes it possible to view entries in the Jet Propulsion Laboratory (JPL) telephone directory by use of PalmPilot ™ (or equivalent) personal digital assistants.

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Calculation Management Captures and Tracks Engineering Design Information

A systematic software approach enables designers to manage engineering methods and values.

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Fast Algorithms for Model-Based Diagnosis

Methods based on Boolean functions and linear programming are more practical for complex systems. Two improved new methods for automated diagnosis of complex engineering systems involve the use of novel algorithms that are more efficient than prior algorithms used for the same purpose. Both the recently developed algorithms and the prior algorithms in question are instances of model-based diagnosis, which is based on exploring the logical inconsistency between an observation and a description of a system to be diagnosed.

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Biased Randomized Algorithm for Fast Model-Based Diagnosis

The bias increases the likelihood of making a minimal diagnosis.

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Two Methods for Efficient Solution of the Hitting-Set Problem

A paper addresses much of the same subject matter as that of “Fast Algorithms for Model-Based Diagnosis” (NPO-30582), which appears elsewhere in this issue of NASA Tech Briefs.

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In Situ Electrochemical Deposition of Microscopic Wires

Tedious, expensive post-growth assembly is no longer necessary.

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