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Briefs: Semiconductors & ICs
A device denoted a board saver has been developed as a means of reducing wear and tear of a printed-circuit board onto which an antifuse field-programmable gate array (FPGA) is to be eventually...
Briefs: Semiconductors & ICs
Digital Synchronizer Without Metastability
A proposed design for a digital synchronizing circuit would eliminate metastability that plagues flip-flop circuits in digital input/output interfaces. This metastability is associated with sampling, by use of flip-flops, of an external signal that is asynchronous with a clock signal that drives the...
Briefs: Electronics & Computers
A two-stage variable sample-rate conversion (SRC) system has been proposed as part of a digital signal-processing system in a digital communication radio receiver that utilizes a variety of data...
Briefs: Electronics & Computers
A method of estimating phase drifts of microwave signals distributed to, and transmitted by, antennas in an array involves the use of the signals themselves as phase...
Briefs: Electronics & Computers
Monolithic microwave integrated-circuit (MMIC) amplifiers of a type now being developed for operation at frequencies of hundreds of gigahertz contain InP high- electron-mobility...
Briefs: Electronics & Computers
Compact, Low-Overhead, MIL-STD-1553B Controller
A compact and flexible controller has been developed to provide MIL-STD-1553B Remote Terminal (RT) communications and supporting and related functions with minimal demand on the resources of the system in which the controller is to be installed. (MIL-STD-1553B is a military standard that encompasses a...
Briefs: Materials
Electrolytes comprising LiPF6 dissolved in alkyl carbonate/fluoroester mixtures have been found to afford improved low-temperature performance and greater high-temperature resilience in...
Briefs: Materials
An improved design concept for aerogel vacuum thermal-insulation panels calls for multiple layers of aerogel sandwiched between layers of aluminized Mylar (or equivalent) poly(ethylene terephthalate),...
Briefs: Materials
Using Volcanic Ash To Remove Dissolved Uranium and Lead
Experiments have shown that significant fractions of uranium, lead, and possibly other toxic and/or radioactive substances can be removed from an aqueous solution by simply exposing the solution, at ambient temperature, to a treatment medium that includes weathered volcanic ash from Pu’u...
Briefs: Mechanical & Fluid Systems
A proposed system in a gondola containing scientific instruments suspended by a balloon over the surface of the Saturn moon Titan would quickly acquire samples of rock or ice from the...
Briefs: Mechanical & Fluid Systems
A proposed alternative design for the balloon- borne ground-sampling system described in the immediately preceding article would not rely on free fall to drive a harpoonlike...
Briefs: Information Technology
A digital signal-processing algorithm has been devised as a means of aligning (as defined below) the outputs of multiple receiving radio antennas in a large array for the purpose of...
Briefs: Electronics & Computers
Enhanced Video-Oculography System
A previously developed video-oculography system has been enhanced for use in measuring vestibulo-ocular reflexes of a human subject in a centrifuge, motor vehicle, or other setting. The system as previously developed included a lightweight digital video camera mounted on goggles. The left eye was illuminated by an...
Briefs: Electronics & Computers
A method has been proposed to increase the degree of synchronization of a radio receiver with the phase of a suppressed carrier signal modulated with a binary-phase-shift-keying (BPSK) or...
Briefs: Electronics & Computers
A proposed heterodyne receiver would be capable of detecting electromagnetic radiation in both of two orthogonal linear polarizations, separating sidebands, and providing...
Briefs: Electronics & Computers
A new approach to masterless, distributed, digital-charge control for batteries requiring charge control has been developed and implemented. This approach is required in battery chemistries that need cell-level...
Briefs: Semiconductors & ICs
Generic structures have been conceived for multiplexer blocks to be implemented in field-programmable gate arrays (FPGAs) based on four-gate field-effect transistors (G4FETs). This...
Briefs: Semiconductors & ICs
A system comprising very-large-scale integrated (VLSI) circuits is being developed as a means of bioinformatics-oriented analysis and recognition of patterns of fluorescence generated...
Briefs: Semiconductors & ICs
A three-stage monolithic millimeter-wave integrated-circuit (MMIC) amplifier designed to exhibit low noise in operation at frequencies from about 100 to somewhat above 180 GHz has been built and tested....
Briefs: Materials
Inert Welding/Brazing Gas Filters and Dryers
A system has been designed to reduce the hydrogen molecule content in inert gases that are used for shielding the welding arc and molten weld area during the manual fusion, automated welding, and induction brazing process. Two desiccant pipeline dryer cartridges are connected together using either...
Briefs: Manufacturing & Prototyping
Fabricating Copper Nanotubes by Electrodeposition
Copper tubes having diameters between about 100 and about 200 nm have been fabricated by electrodeposition of copper into the pores of alumina nanopore membranes. Copper nanotubes are under consideration as alternatives to copper nanorods and nanowires for applications involving thermal and/or...
Briefs: Materials
The use of hybridized carbon/silicon carbide (C/SiC) fabric to reinforce ceramic matrix composite face sheets and the integration of such face sheets with a foam...
Briefs: Mechanical & Fluid Systems
Some simple structural modifications have been demonstrated to be effective in reducing aerodynamic drag on vehicles that have empty open cargo bays. The modifications were originally...
Briefs: Mechanical & Fluid Systems
The term “rotary percussive autogopher” denotes a proposed addition to a family of apparatuses, based on ultrasonic/sonic drill corers (USDCs), that have been described in...
Briefs: Mechanical & Fluid Systems
Thermostatic Valves Containing Silicone-Oil Actuators
Flow-splitting and flow-mixing thermally actuated spool valves have been developed for controlling flows of a heat-transfer fluid in a temperature-regulation system aboard the Mars Science Laboratory (MSL) rover. Valves like these could also be useful in terrestrial temperature-regulation...
Briefs: Mechanical & Fluid Systems
Modular exploratory robotic vehicles that will be able to reconfigure themselves in the field are undergoing development. These vehicles at the initial concept stage were described in...
Briefs: Materials
Cyclic Oxidation Behavior of CuCrAl Cold-Sprayed Coatings for Reusable Launch Vehicles
The next generation of reusable launch vehicles is likely to use GRCop-84 [Cu-8(at.%)Cr-4%Nb] copper alloy combustion liners. The application of protective coatings on GRCop-84 liners can minimize or eliminate many of the environmental problems experienced by...
Briefs: Materials
Ceramic Fiber Structures for Cryogenic Load-Bearing Applications
This invention is intended for use as a load-bearing device under cryogenic temperatures and/or abrasive conditions (i.e., during missions to the Moon). The innovation consists of small-diameter, ceramic fibers that are woven or braided into devices like ropes, belts, tracks, or...
Briefs: Materials
Elastomer Reinforced With Carbon Nanotubes
Elastomers are reinforced with functionalized, single-walled carbon nanotubes (SWNTs) giving them high- breaking strain levels and low densities. Cross-linked elastomers are prepared using amine-terminated, poly(dimethylsiloxane) (PDMS), with an average molecular weight of 5,000 daltons, and a...
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Webcasts
On-Demand Webinars: Electronics & Computers
Advantages of Smart Power Distribution Unit Design for Automotive &...
Upcoming Webinars: Unmanned Systems
Quiet, Please: NVH Improvement Opportunities in the Early Design...
Upcoming Webinars: AR/AI
From Spreadsheets to Insights: Fast Data Analysis Without Complex...
Upcoming Webinars: Defense
Cooling a New Generation of Aerospace and Defense Embedded...
Upcoming Webinars: Software
Beyond AI-Copy-Paste Engineering: Advanced AI-Integration Success...
Upcoming Webinars: Energy
