Stories
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Briefs: Electronics & Computers
The new high-speed interconnect standards will dramatically change the way computer and communication systems are designed. Switch- based systems will be the winners in new high-performance designs,...
Briefs: Electronics & Computers
A computer-based simulation system creates a visual and haptic virtual environment for training a medical practitioner in laparoscopic surgery. Heretofore, it has been common practice to...
Briefs: Electronics & Computers
The designs of microscopic toroidalcore inductors in integrated circuits of DC-to-DC voltage converters would be modified, according to a proposal, by filling the gaps in the cores with...
Briefs: Electronics & Computers
Improved autoassociative neural networks, denoted nexi, have been proposed for use in controlling autonomous robots, including mobile exploratory robots of the biomorphic type. In comparison with...
Briefs: Energy
A unique safety flasher powered by photovoltaic cells and ultracapacitors has been developed. Safety flashers are used wherever there are needs to mark actually or potentially hazardous...
Briefs: Electronics & Computers
The F-15 Advanced Controls Technology for Integrated Vehicles (ACTIVE) airplane (see figure) was the test bed for a flight test of an intelligent flight control system (IFCS). This IFCS...
Briefs: Electronics & Computers
Sensor packages that would be dropped from airplanes have been proposed for pre-eruption monitoring of physical conditions on the flanks of awakening volcanoes. The purpose of such...
Briefs: Electronics & Computers
An effort is under way to develop capacitive sensors for measuring the masses of cryogenic fluids in tanks. These sensors are intended to function in both microgravitational and normal...
Briefs: Electronics & Computers
Microstrip patch antennas of a proposed type would be tunable over broad wavelength ranges. These antennas would be attractive for use in a variety of microwave communication systems in which there are...
Briefs: Electronics & Computers
An ultra-high-frequency microstrip-patch antenna has been built for use in airborne synthetic-aperture radar (SAR). The antenna design satisfies requirements specific to the GeoSAR...
Briefs: Electronics & Computers
A monolithic microwave integrated circuit (MMIC) that includes a high-electron-mobility transistor (HEMT) has been developed as a prototype of improved frequency doublers for generating signals at frequencies...
Briefs: Electronics & Computers
GPS Position and Heading Circuitry for Ships
Circuit boards that contain radio-frequency (RF) and digital circuitry have been developed by NASA to satisfy a requirement of the Port of Houston Authority for relatively inexpensive Global Positioning System (GPS) receivers that indicate the azimuthal headings as well as the positions of ships. The...
Briefs: Electronics & Computers
A proposed safety system would effect an inhibitory action when- ever a power tool was aimed in a direction outside a prescribed range of allowable directions. The power tool could be a...
Briefs: Electronics & Computers
A simple technique has been devised to reduce the number of lead wires needed to connect an array of thermocouples to the instruments (e.g., voltmeters) used to read their output voltages....
Briefs: Electronics & Computers
Devices that look and function much like conventional zippers on clothing have been proposed as connectors for flexible electronic circuits. Heretofore, flexible electronic circuits have...
Briefs: Electronics & Computers
Novel architectures based on parallel subconvolution frequency-domain filtering methods have been developed for modular processing rate reduction of discrete-time pulse-shaping filters. Such...
Briefs: Electronics & Computers
ModalMax is a very innovative means of harnessing the vibration of a piezoelectric actuator to produce an energy efficient low-profile device with high-bandwidth high-fidelity audio response. The...
Briefs: Electronics & Computers
The figure depicts a solar photovoltaic power station in which ultracapacitors, rather than batteries, are used to store energy. Developments in the semiconductor industry have reduced...
Briefs: Electronics & Computers
Parallel Subconvolution Filtering Architectures
These architectures are based on methods of vector processing and the discrete Fourier transform/inverse discrete Fourier transform (DFT-IDFT) overlap and save method, combined with time-block separation of digital filters into frequency-domain subfilters implemented by use of sub-convolutions. The...
Briefs: Electronics & Computers
Radio System for Locating Emergency Workers
A system based on low-power radio transponders and associated analog and digital electronic circuitry has been developed for locating firefighters and other emergency workers deployed in a building or other structure. The system has obvious potential for saving lives and reducing the risk of injuries.
Briefs: Electronics & Computers
A proposed successive approximation analog-to-digital converter (ADC) would contain a capacitively terminated chain of identical capacitor cells (see figure). Like a conventional successive...
Briefs: Electronics & Computers
A reduced-complexity alternative to an optimum FQPSK-B Viterbi receiver has been invented. As described below, the reduction in complexity is achieved at the cost of only a small...
Briefs: Electronics & Computers
A multilayer patch antenna, similar to a Yagi antenna, surrounded by a metallic wall has been devised to satisfy requirements to fit within a specified size and shape and to generate a beam...
Briefs: Electronics & Computers
Standard induction motors, normally designed to run at base speeds between 850 to 3500 rpm, are not particularly well suited for low-speed operation, as their efficiency...
Briefs: Electronics & Computers
Power demand can be managed to reduce cost.
The Ames Power Monitoring System (APMS) is a centralized system of power meters, computer hardware, and special-purpose software that collects and stores electrical...
Briefs: Electronics & Computers
A subsystem for the adaptive suppression of noise in a voice-communication system effects a high level of reduction of noise that enters the system through microphones. The subsystem...
Briefs: Electronics & Computers
Integrated arrays of microscopic solid-state batteries have been demonstrated in a continuing effort to develop microscopic sources of power and of voltage reference...
Briefs: Electronics & Computers
The figure shows one of four solid-state power amplifiers, each capable of generating an output power ≥240 mW over one of four overlapping frequency bands from 71 to 106 GHz. (The bands are...
Briefs: Sensors/Data Acquisition
A relatively inexpensive instrumentation system that includes units that are connected to thermocouples and that are parts of a radio-communication network has been developed to enable monitoring of...
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