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Briefs: Mechanical & Fluid Systems
The figure depicts the steep terrain access robot (STAR) — a walking robot that has been proposed for exploring steep terrain on remote planets. Robots based on the STAR concept could also be used on steep...
Briefs: Mechanical & Fluid Systems
Measuring Dynamic Transfer Functions of Cavitating Pumps
A water-flow test facility has been built to enable measurement of dynamic transfer functions (DTFs) of cavitating pumps and of inducers in such pumps. Originally, the facility was intended for use in an investigation of the effects of cavitation in a rocket-engine low-pressure oxygen...
Briefs: Medical
Advanced Resistive Exercise Device
The advanced resistive exercise device (ARED), now at the prototype stage of development, is a versatile machine that can be used to perform different customized exercises for which, heretofore, it has been necessary to use different machines. Conceived as a means of helping astronauts and others to maintain...
Briefs: Medical
A process has been developed for the rapid tissue engineering of multicellular- tissue-equivalent assemblies by the controlled enzymatic degradation of...
Briefs: Physical Sciences
Theoretical calculations have shown that the degrees of spin polarization in proposed nonmagnetic semiconductor resonant tunneling spin filters could be increased through exploitation of...
Briefs: Physical Sciences
The resonant tunneling spin pump is a proposed semiconductor device that would generate spin-polarized electron currents. The resonant tunneling spin pump would be a purely electrical device in the sense that it...
Briefs: Physical Sciences
CO₂-Reduction Primary Cell for Use on Venus
A document proposes a CO2-reduction primary electrochemical cell as a building block of batteries to supply electric power on the surface of Venus. The basic principle of the proposed cell is similar to that of terrestrial Zn-air batteries, the major differences being that (1) the anode metal would not...
Briefs: Information Technology
Proper orthogonal decomposition (POD) is the mathematical basis of a method of constructing low-order mathematical models for the "gray-box" fault- detection algorithm that is a component of...
Briefs: Information Technology
The descent image motion estimation system (DIMES) is a system of hardware and software, designed for original use in estimating the horizontal velocity of a spacecraft descending toward...
Briefs: Physical Sciences
An apparatus that serves as a source of a cold beam of atoms contains multiple two-dimensional (2D) magneto-optical traps (MOTs). (Cold beams of atoms are used in atomic clocks and in...
Briefs: Photonics/Optics
According to a proposal, photonic crystals would be used to greatly increase the sensitivities of optical magnetometers that are already regarded as ultrasensitive. The proposal applies, more...
Briefs: Photonics/Optics
A Raman-scattering-suppressing input/output coupling scheme has been devised for a whispering-gallery-mode optical resonator that is used as a four-wave-mixing device to effect an...
Briefs: Photonics/Optics
Theoretical and experimental investigations have demonstrated the feasibility of compact white-light sensor optics consisting of unitary combinations of (1) low-profile...
Briefs: Photonics/Optics
A proposed opto-electronic oscillator (OEO) would generate a microwave signal having degrees of frequency stability and spectral purity greater than those achieved in prior OEOs. The...
Briefs: Electronics & Computers
Two simple position or displacement sensors based on inductance-capacitance resonant circuits have been conceived. These sensors are both powered and interrogated without use of wires and...
Briefs: Physical Sciences
The terminal descent sensor (TDS) is a radar altimeter/velocimeter that improves the accuracy of velocity sensing by more than an order of magnitude when compared to existing sensors. The TDS is designed...
Briefs: Physical Sciences
Solid-state electrochemical sensors for measuring the degrees of acidity or alkalinity (in terms of pH values) of liquid solutions are being developed. These sensors are intended to supplant...
Briefs: Physical Sciences
An improvement in the design and fabrication of sensing coils of superconducting quantum interference device (SQUID) magnetometers has been proposed to increase sensitivity. It has been estimated that, in some...
Briefs: Electronics & Computers
A new sensor (see figure) provides an absolute position measurement. The figure presents a schematic view of a motorized linear- translation stage that contains, at each end, an electronic...
Briefs: Materials
Strong, Lightweight, Porous Materials
A new class of strong, lightweight, porous materials has been invented as an outgrowth of an effort to develop reinforced silica aerogels. The new material, called X-Aerogel is less hygroscopic, but no less porous and of similar density to the corresponding unmodified aerogels. However, the property that sets...
Briefs: Materials
Nanowicks are dense mats of nanoscale fibers that are expected to enable the development of a variety of novel capillary pumps, filters, and fluidic control devices. Nanowicks make it possible obtain a variety of novel effects,...
Briefs: Materials
TUFROC (Toughened Uni-piece Fibrous Reinforced Oxidation- resistant Composite) has been developed as a new thermal protection system (TPS) material for wing leading edge and nose cap...
Briefs: Manufacturing & Prototyping
The figure depicts selected aspects of the rapid and quiet drill (RAQD), which is a prototype apparatus for drilling concrete or bricks. The design and basic principle of operation of the RAQD overlap, in several respects,...
Briefs: Manufacturing & Prototyping
A relatively simple and economical process and apparatus for concentrating hydrogen peroxide from aqueous solution at the point of use have been invented. The need for this or a similar invention arises for the...
Briefs: Semiconductors & ICs
The figure shows two monolithic microwave integrated-circuit (MMIC) amplifier chips optimized to function in the frequency range of 90 to 130 GHz, covering nearly all of F-band (90 – 140 GHz). These...
Briefs: Electronics & Computers
A printed, folded, Hilbert-curve fractal microwave antenna has been designed and built to offer advantages of compactness and low mass, relative to other antennas designed for the...
Briefs: Electronics & Computers
Panoramic detection systems (PDSs) are developmental video monitoring and image-data processing systems that, as their name indicates, acquire panoramic views. More specifically, a PDS acquires images...
Briefs: Electronics & Computers
Electronic circuitry has been developed to serve as an interface between an electronic tongue and digital input/output boards in a laptop computer that is used to control the tongue and...
Briefs: Electronics & Computers
An inexpensive wall clock has been devised for displaying solar time or sidereal time as it would be perceived on a planet other than the Earth, or for displaying sidereal time on the...
Top Stories
Blog: Design
A Stretchable OLED that Can Maintain Most of Its Luminescence
INSIDER: Design
Advancing All-Solid-State Batteries
Blog: Power
My Opinion: We Need More Power Soon — Is Nuclear the Answer?
Blog: Energy
Batteries that Can Withstand the Cold
Quiz: Power
Blog: Robotics, Automation & Control
Microscopic Swimming Machines that Can Sense, Respond to Surroundings
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
