Here are innovative solutions for your biggest challenges in Electronics and Software - Power Supplies and Management, Board-Level Electronics, Components and Batteries. You’ll find applications essential to military, aviation, medical and automotive design engineering.

Briefs : Electronics & Computers
Discriminator-Stabilized Superconductive/Ferroelectric Oscillator

An oscillator circuit that contains superconductive and ferroelectric resonator elements is undergoing development. This circuit is designed to serve as a frequency-locked local oscillator in a communication system in which digital data are conveyed via phase modulation on a...

Briefs : Software
Quick and Unusually Easy Repository Search Software

The Quick and Unusually Easy Repository Search computer program simplifies the search for information contained in a repository of documents at Marshall Space Flight Center. Searching for information on the basis of general subjects can be very time-consuming and frustrating: The repository at...

Briefs : Information Technology
LTI Approach to Adaptive Narrow-Band Feedforward Control

A unified theory of linear time-invariant (LTI) representations has been developed for use in the analysis and design of adaptive, narrow-band, feedforward controllers for systems characterized by harmonic regressors (the term "harmonic regressor" is defined below). Such controllers are...

Briefs : Information Technology
Training of Neural Networks by Modified Taguchi Techniques

Modified Taguchi techniques of robust design optimization are used in an innovative method of training artificial neural networks — for example the network shown in the figure. As in other neural-network-training methods, the synaptic weights (strengths of connections between neurons)...

Briefs : Information Technology
Software for Assessing Effects of Designs on Operations

The Operations Impact Assessor (OIA) computer program facilitates rapid assessment of the effects of designs of spacecraft on spacecraft-processing operations at a launch site. OIA is a user-friendly, object-oriented, artificial-intelligence application program that features model-based...

Briefs : Information Technology
Improved Design of Adaptive Feedforward Tracking Systems

An improved method of analysis and design offers the potential to enhance the performances of adaptive feedforward tracking systems. The method can, in principle, make it possible to increase such performance measures as rates of convergence and noise-cancellation ratios, without need for...

Briefs : Information Technology
Expressing Object-Oriented Concepts in Fortran 90

A methodology for object-oriented programming in Fortran 90 has been developed. The methodology provides for emulation of the most important object-oriented concepts of C++; namely, classes (including abstract data types, encapsulation, and function overloading), inheritance, and dynamic...

Briefs : Electronics & Computers
Induced-Eddy-Current-Sensor Measurement of Semiconductor Performance

Recombination lifetime and minority-carrier lifetime are key performance parameters of semiconductor wafers used for microelectronics and solar cells. They are also particularly valuable for identifying low levels of impurities in wafers used for high-density integrated...

Briefs : Electronics & Computers
Radiative Measurement of Temperature in a MESFET Channel

A technique based on infrared-emission spectroscopy has been found to be useful for noncontact measurement of the temperature of a hot spot in the gate channel of a GaAs metal/semiconductor field-effect transistor (MESFET). Temperature measurements are important for the development of...

Briefs : Electronics & Computers
Rechargeable Microbatteries With Li Anodes Formed In Situ

Rechargeable, thin-film, lithium-based microbatteries of the proposed type would be manufactured in the discharged condition, and lithium anodes would be formed in situ during subsequent charging. In contrast, state-of-the-art rechargeable, thin-film, lithium-based microbatteries are...

Briefs : Electronics & Computers
Automated Cable-Analyzer System – ACAS

An instrumentation system automates the detection and location of faults in multiconductor electrical cables. It can accelerate diagnoses of aircraft, automotive, or industrial cables, while reducing the incidence of errors and of damage caused by test probes.

Briefs : Electronics & Computers
Dual-Channel Precision Signal-to-Noise Ratio Generator

During the development and testing of signal processing systems, it is useful to generate test signals in the laboratory in order to quantify system parameters such as dynamic range, processing gain, or frequency resolution. Furthermore, it is convenient to have two test signals that are...

Briefs : Electronics & Computers
Process for Fabrication of Micro Fluidic Structures

Through an innovative microfabrication process, enclosed microstructures are created for "laboratory on a chip" applications, such as medical diagnostics. These microstructures include capillaries, tunnels, pipettes, reaction vessels, and cavities. Using only conventional lithographic...

Briefs : Electronics & Computers
Lightweight Dual-Beam Reflector Antenna

The figure illustrates a lightweight composite-material dual-beam reflector antenna for the SeaWinds spaceborne scatterometer instrument, which operates in the Ku band and is designed to measure wind velocities at the surface of the ocean. The design of the antenna could also be of interest for...

Briefs : Electronics & Computers
Sight-to-Touch Translator

The sight-to-touch translator (ST3) is a conceptual electronic apparatus that would generate a tactile representation of visible objects in its vicinity. The ST3 would be worn by a blind person; the tactile display would help the wearer to visualize nearby obstacles and act to avoid them. Thus,...

Briefs : Electronics & Computers
Optical Horizontal-Displacement Sensors for Crane Payloads

Sensors made largely of commercially available optical and electronic components are being developed for use in measuring small horizontal displacements of payloads suspended below cranes at the ends of nominally vertical cables. The outputs of these sensors would be used in...

Briefs : Software
Program for Design Analysis of Cache Memory

CACHESIM is a C-language computer program that simulates (1) cache-memory options associated with a computer hardware design concept and (2) related properties that can be expected to affect the overall performance of the computer, before the computer is constructed. Heretofore, the performance...

Briefs : Software
Software for Retrieval and Display of Planetary Data

The NASAView computer program provides access to, and display of, sets of scientific data in the Planetary Data System (PDS) archive. These data — totalling about 5 terabytes — were acquired during NASA's planetary-exploration missions and are stored along with descriptive information...

Briefs : Software
Program for Microanalysis of Composite Structures

Version 3.0 of the Boundary Element Solutions Technology Composite Modeling System (BESTCMS 3.0) is an advanced engineering software system for the microanalysis of fiber composite structures. BESTCMS is based on the BEST3D boundary-element program (COSMIC program LEW-15351). BESTCMS affords...

Briefs : Software
Software for Tooth-Contact Analysis of Spiral Bevel Gears

The SBGTAPER computer program implements a method for design and generation of spiral bevel gears that feature tapered teeth with localized bearing contact and a low level of transmission errors. The influence of misalignment on transmission errors and shift of bearing contact were...

Briefs : Electronics & Computers
Coplanar-Stripline Transition and Band-Stop Filters

Three coplanar-stripline circuits have been designed to perform coupling and filtering functions in microwave systems. These circuits could be incorporated into feed networks for microwave antennas, for example. One of the circuits comprises two back-to-back coplanar-strip-to-microstrip...

Briefs : Information Technology
Software for Improving Operational Processes

The Schedule and Cost Risk Analysis Modeling System (SCRAM) computer program identifies important sources of schedule and cost risks in an operational process. The related Process Analysis and Improvement Support System (PASS) program assists in the overall analysis and improvement of an operational...

Briefs : Information Technology
Software for Planning in a Hierarchical Processing Environment

Decision-support software based on discrete-event simulation (DES) has been undergoing development for use in planning and scheduling work in the Orbiter Processing Facility (OPF) at Kennedy Space Center. The software is also suitable for adaptation to similar use in other facilities...

Briefs : Information Technology
Work-Measurement and Methods-Analysis Studies of the OPF

Two reports describe early phases of continuing studies directed toward the selection and adaptation of industrial work-measurement and methods-analysis procedures for application to the Orbiter Processing Facility (OPF) at Kennedy Space Center. These studies were prompted by a need to...

Briefs : Information Technology
Model for Investigating Human Factors in an Organization

The Kennedy Space Center Human Factors Event Evaluation Model is a model to facilitate long-term gathering and analysis of data to investigate the effects of human factors on the operations of a complex organization. The model was developed specifically for use in comprehensive...

Briefs : Information Technology
Consortium Benchmarking in a Competitive Environment

The Kennedy Benchmarking Clearinghouse (KBC) is an organization for implementing an emerging methodology called "consortium benchmarking" in a competitive business environment. The partners in the KBC include NASA Kennedy Space Center and a number of its contractors. Within the KBC, the...

Briefs : Information Technology
Diagnosing Helicopter Gearboxes Using Connectionist Networks

A method of automated diagnosis of helicopter gearboxes involves processing of selected features of digitized outputs of vibration sensors via structure-based connectionist networks (SBCNs), which are mathematical constructs that incorporate elements from the disciplines of dynamical...

Briefs : Photonics/Optics
Transmitting Data Signals via Fiber-Optic Power Lines

Data signals can be transmitted via the same optical fibers that are used to transmit power from base stations to remote stations containing sensors and associated circuitry. [A prototype system based on fiber-optic transmission of data and power is described in "General-Purpose Optically...

Briefs : Motion Control
Antiovershoot Position Control for Motors Run at Full Speed

An improved motor controller provides a circuit that will allow a motor to run at full speed while traveling from point A to point B, and still be able to obtain the desired damping coefficient when reaching point B. Previously, a motor would overshoot its desired stopping point when...

Briefs : Electronics & Computers
Signaling-and-Detection Scheme for Beacon Monitoring

A signaling-and-detection scheme has been proposed for use in conjunction with the remote-monitoring concept described in "Beacon Monitoring Would Reduce Interactions With Remote Systems" (NPO-19706), NASA Tech Briefs, Vol. 21, No. 5 (May 1997), page 54. To recapitulate: A remote system (a...