Information Science

Fuzzy Logic Engine

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

Posted in: Information Sciences, Briefs, TSP

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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.

Posted in: Information Sciences, Briefs, TSP

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Calculation Management Captures and Tracks Engineering Design Information

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

Posted in: Information Sciences, Briefs

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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.

Posted in: Information Sciences, Briefs, TSP

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Biased Randomized Algorithm for Fast Model-Based Diagnosis

The bias increases the likelihood of making a minimal diagnosis.

Posted in: Information Sciences, Briefs, TSP

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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.

Posted in: Information Sciences, Briefs, TSP

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Software For Use With Optoelectronic Measuring Tool

A computer program has been written to facilitate and accelerate the process of measurement by use of the apparatus described in “Optoelectronic Tool Adds Scale Marks to Photographic Images” (KSC-12201), NASA Tech Briefs, Vol. 27, No. 1 (January 2003), page 6a. To recapitulate: The tool contains four laser diodes that generate parallel beams of light spaced apart at a known distance. The beams of light are used to project bright spots that serve as scale marks that become incorporated into photographic images (including film and electronic images). The sizes of objects depicted in the images can readily be measured by reference to the scale marks.

Posted in: Information Sciences, Briefs, TSP

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