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Briefs: Manufacturing & Prototyping
An improved method of selective plating of metals and possibly other materials involves the use of directed high-intensity acoustic beams. The beams, typically in the ultrasonic frequency...
Briefs: Mechanical & Fluid Systems
A suitlock assembly that comprises a docking fixture and mechanism has been invented to facilitate and accelerate donning and doffing of a sealed protective suit and/or to enable ingress and...
Briefs: Photonics/Optics
An optoelectronic apparatus has been invented as a noninvasive means of measuring the concentration of glucose in the human body. The apparatus performs polarimetric and interferometric...
Briefs: Mechanical & Fluid Systems
Solution-Adaptive Program for Computing 2D/Axi Viscous Flow
A computer program solves the Navier- Stokes equations governing the flow of a viscous, compressible fluid in an axisymmetric or two-dimensional (2D) setting. To obtain solutions more accurate than those generated by prior such programs that utilize regular and/or fixed computational...
Briefs: Photonics/Optics
An optoelectronic system has been developed for measuring heights, above a floor, of designated points on a large object. In the original application for which the system was conceived,...
Briefs: Photonics/Optics
A method of detecting bacterial spores incorporates
Briefs: Photonics/Optics
Miniature, relatively inexpensive microbioanalytical systems ("laboratory-on-a-chip" devices) have been proposed for the detection of hazardous microbes and toxic chemicals. Each system...
Briefs: Photonics/Optics
Pulsed-Source Interferometry in Acoustic Imaging
A combination of pulsed-source interferometry and acoustic diffraction has been proposed for use in imaging subsurface microscopic defects and other features in such diverse objects as integrated-circuit chips, specimens of materials, and mechanical parts. A specimen to be inspected by this technique...
Briefs: Photonics/Optics
Live/Dead Bacterial Spore Assay Using DPA-Triggered Tb Luminescence
A method of measuring the fraction of bacterial spores in a sample that remain viable exploits DPA-triggered luminescence of Tb3+ and is based partly on the same principles as those described in the immediately preceding article. Unlike prior methods for performing such live/dead...
Briefs: Medical
Growth Conditions To Reduce Oxalic Acid Content of Spinach
A controlled environment agricultural (CEA) technique to increase the nutritive value of spinach has been developed. This technique makes it possible to reduce the concentration of oxalic acid in spinach leaves. It is desirable to reduce the oxalic acid content because oxalic acid acts as...
Briefs: Medical
The hydrodynamic focusing bioreactor (HFB) is a bioreactor system designed for three-dimensional cell culture and tissue-engineering investigations on orbiting spacecraft and in...
Briefs: Information Technology
Further work on beacon-based exception analysis for multimissions (BEAM), a method of real-time, automated diagnosis of a complex electromechanical systems, has greatly...
Briefs: Information Technology
Self-Supervised Dynamical Systems
Some progress has been made in a continuing effort to develop mathematical models of the behaviors of multi- agent systems known in biology, economics, and sociology (e.g., systems ranging from single or a few biomolecules to many interacting higher organisms). This effort at an earlier stage was reported in...
Briefs: Information Technology
Irreversible Entropy Production in Two-Phase Mixing Layers
This report presents a study of dissipation (irreversible production of entropy) in three-dimensional, temporal mixing layers laden with evaporating liquid drops. The purpose of the study is to examine the effects of evaporating drops on the development of turbulent features in flows....
Briefs: Software
Software for Tracking Costs of Mars Projects
The Mars Cost Tracking Model is a computer program that administers a system set up for tracking the costs of future NASA projects that pertain to Mars. Previously, no such tracking system existed, and documentation was written in a variety of formats and scattered in various places. It was difficult to...
Briefs: Software
Software Computes Tape-Casting Parameters
Tcast2 is a FORTRAN computer program that accelerates the setup of a process in which a slurry containing metal particles and a polymeric binder is cast, to a thickness regulated by a doctor blade, onto fibers wound on a rotating drum to make a “green” precursor of a metal-matrix/fiber composite tape....
Briefs: Medical
Sports-related injuries are a common cause of damaged ligaments and tendons in shoulders, knees, wrists, elbows and ankles, and can usually be repaired through arthroscopic surgery. Through an...
Briefs: Medical
A laboratory method has been devised to enable measurement of the concentration of iron bound in ferritin from small samples of blood (serum). Derived partly from a prior method that depends...
Briefs: Physical Sciences
Subsonic and Supersonic Effects in Bose-Einstein Condensate
A paper presents a theoretical investigation of subsonic and supersonic effects in a Bose-Einstein condensate (BEC). The BEC is represented by a time-dependent, nonlinear Schroedinger equation that includes terms for an external confining potential term and a weak interatomic repulsive...
Briefs: Physical Sciences
A recent addition to the growing class of microelectromechanical systems (MEMS) is a single stage of a Knudsen compressor. This device was fabricated and tested to demonstrate the feasibility of Knudsen...
Briefs: Physical Sciences
Compact Instruments Measure Helium-Leak Rates
Compact, lightweight instruments have been developed for measuring small flows of helium and/or detecting helium leaks in solenoid valves when the valves are nominally closed. These instruments do not impede the flows when the valves are nominally open. They can be integrated into newly fabricated...
Briefs: Physical Sciences
Improved Measurement of Coherence in Presence of Instrument Noise
A method for correcting measured coherence spectra for the effect of incoherent instrument noise has been developed and demonstrated. Coherence measurements are widely used in engineering and science to determine the extent to which two signals are alike. The signals may come from...
Briefs: Physical Sciences
A pseudo-Brewster- angle infrared radiometer has been proposed for use in noncontact measurement of the surface temperature of a large body of water (e.g., a lake or ocean). This radiometer could be...
Briefs: Materials
Process for Encapsulating Protein Crystals
A process for growing protein crystals encapsulated within membranes has been invented. This process begins with the encapsulation of a nearly saturated aqueous protein solution inside semipermeable membranes to form microcapsules. The encapsulation is effected by use of special formulations of a dissolved...
Briefs: Materials
Mixed Conducting Electrodes for Better AMTEC Cells
Electrode materials that exhibit mixed conductivity (that is, both electronic and ionic conductivity) have been investigated in a continuing effort to improve the performance of the alkali metal thermal-to-electric converter (AMTEC). These electrode materials are intended primarily for use on the...
Briefs: Electronics & Computers
Arrays of electrodes integrated with chip-scale packages and silicon-based integrated circuits have been proposed for use as medical electronic implants, including neuro-prosthetic...
Briefs: Mechanical & Fluid Systems
Using ERF Devices To Control Deployments of Space Structures
A report proposes devices containing electrorheological fluids (ERFs) damper for controlling deployments of lightweight, flexible structures in outer space. The structures would include spring members that could be wound or compressed for compact stowage during transport. The ERF based...
Briefs: Energy
The term "common/dependent pressure vessel" (C/DPV) denotes a proposed alternative configuration for a nickel-hydrogen battery. The C/DPV configuration is so named because it...
Briefs: Electronics & Computers
Capacitors capable of storing energy at high densities are being developed for use in pulse-power circuits in such diverse systems as defibrillators, particle-beam accelerators, microwave sources, and weapons....
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
