Stories
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Briefs: Mechanical & Fluid Systems
A structure provides rigid support for a cryogenic component but transmits minimal heat. The structure includes two beams of Invar (or equivalent low-thermal expansion iron/nickel alloy) that...
Briefs: Materials
A foam suppressor removes soap and other foaming agents from a stream of wastewater that is being treated electrolytically. This wastewater is a combination of laundry, hygiene, and urine wastewater. It is desirable...
Briefs: Photonics/Optics
The portable, easily expandable Microburst Automatic Detection (MAD) system can dramatically improve aviation safety. Mimicking the reasoning of a human observer on the lookout for weather hazards, MAD...
Briefs: Materials
Two Methods for Purifying Carbon Tetrachloride
Two methods have been developed to purify large batches of technical-grade carbon tetrachloride. The relatively impure carbon tetrachloride that had been purchased for use in infrared analysis of dissolved hydrocarbons proved that it could be purified. One method is spinning-band distillation, which is...
Briefs: Manufacturing & Prototyping
Controlled-Orientation Short-Fiber Composite Bodies
A technique for depositing materials into position using a positive-displacement extruder to build up a body has been developed. This technique also includes a process to prepare composite materials through a solid free-body forming process containing directionally aligned short-fiber...
Briefs: Physical Sciences
A computational method for designing all-dielectric grating electromagnetic filters involves a combination of (1) numerical simulation of filter performance via integral-equation...
Briefs: Materials
Nitrogen-Beam Source for Deposition of III/V Nitrides
A nitrogen-beam source has been developed to significantly improve the synthesis of wide-band-gap nitrides.
Briefs: Physical Sciences
The figure schematically illustrates an improved apparatus for generating a flow of gas with precise, stable humidity. Such flows are needed for calibration of dew-point, frost-point, and...
Briefs: Electronics & Computers
Recombination lifetime and minority-carrier lifetime are key performance parameters of semiconductor wafers used for microelectronics and solar cells. They are also...
Briefs: Electronics & Computers
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...
Briefs: Energy
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...
Briefs: Test & Measurement
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...
Briefs: Information Technology
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...
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 effects...
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 useful...
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: Robotics, Automation & Control
Development of Small, Mobile, Special-Purpose Robots
A report presents a scenario for the proposed development of insectlike robots that would be equipped with microsensors and/or micromanipulators, and would be designed, variously, to crawl, burrow, swim, fly, or hop, to perform specific tasks in fields as diverse as exploration,...
Briefs: Robotics, Automation & Control
Adaptive performance optimization (APO) is an approach for improving aircraft performance without the need for extensive modifications of hardware. In this approach, one exploits existing...
Briefs: Physical Sciences
A modification of design has been proposed to extend the longevity of cavity-type solar thermal receivers by improving the distribution of radiant solar flux in the cavities. A receiver...
Briefs: Physical Sciences
Weighted-Hyperbola Technique for Locating Pulsed Sources
The weighted-hyperbola technique is an iterative computational technique for processing data on the times of arrival of pulsed signals at more than four observing stations to determine location (in both space and time) of origin of the signals. (The location is overdetermined when data from...
Briefs: Electronics & Computers
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,...
Briefs: Manufacturing & Prototyping
The need for improved investment castings at Marshall Space Flight Center's Rapid Prototyping Lab has led to the development of a simple machine for centrifugal investment casting of shells. This...
Briefs: Information Technology
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...
Briefs: Manufacturing & Prototyping
A simple change in the design of tools used in manufacturing laminated-composite-material sandwich panels reduces the floor area needed to store the tools. To give meaning to a description...
Briefs: Physical Sciences
The figure shows the basic optical configuration of an improved all-reflecting imaging spectrometer. This spectrometer would differ from older spectrometers in several respects, one being...
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: 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 techniques,...
Briefs: Robotics, Automation & Control
An analysis of empirical data on low-frequency oscillations in the inlet flow of a turbopump has led to the conclusion that these oscillations could be reduced or eliminated with suitable...
Briefs: Materials
The alumina for making a suspension according to this concept must be in the form of a highly pure (preferably >99.99 percent) powder with a suitable particle-size distribution —...
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Ask the Expert
Ralph Bright on the Power of Power Cords
Understanding power system components and how to connect them correctly is critical to meeting regulatory requirements and designing successful electrical products for worldwide markets. Interpower’s Ralph Bright defines these requirements and explains how to know which cord to select for your application.
Webcasts
Podcasts: Medical
How Wearables Are Enhancing Smart Drug Delivery
Podcasts: Medical
Developing Sustainable Drug-Delivery Devices
Podcasts: Design
Smarter Pathways for Precision Drug Delivery in Cancer Care
On-Demand Webinars: Manufacturing & Prototyping
Understanding Testing and Compliance Requirements for Wireless Medical Devices
Podcasts: AR/AI
Personalized Medicine and Drug Delivery
Podcasts: Green Design & Manufacturing
Inside Story
Inside Story: Trends in Packaging and Sterilization
Eurofins Medical Device Testing (MDT) provides a full scope of testing services. In this interview, Eurofins’ experts, Sunny Modi, PhD, Director of Package Testing; and Elizabeth Sydnor, Director of Microbiology; answer common questions on medical device packaging and sterilization.