-1
7830
30
Briefs: Mechanical & Fluid Systems
A method denoted wireless acoustic- electric feedthrough (WAEF) has been conceived for transmitting power and/or data signals through walls or other solid objects made of a variety of...
Briefs: Medical
Apparatus for Sampling Surface Contamination
An apparatus denoted a swab device has been developed as a convenient means of acquiring samples of contaminants from surfaces and suspending the samples in liquids. (Thereafter, the liquids can be dispensed, in controlled volumes, into scientific instruments for analysis of the contaminants.) The swab...
Briefs: Medical
Novel Species of Non-Spore-Forming Bacteria
While cataloging cultivatable microbes from the airborne biological diversity of the atmosphere of the Regenerative Enclosed life-support Module Simulator (REMS) system at Marshall Space Flight Center, two strains that belong to one novel bacterial species were isolated. Based on 16S rRNA gene sequencing...
Briefs: Medical
The laboratory apparatus shown in the figure is a chamber for aerosol deposition of bioparticles on surfaces of test coupons. It is designed for primary use in inoculating both flat and...
Briefs: Physical Sciences
Hyperspectral Sun Photometer for Atmospheric Characterization and Vicarious Calibrations
A hyperspectral sun photometer and associated methods have been developed and demonstrated. Sun photometers are used to measure total (global), direct, and diffuse at-surface solar irradiance. The data acquired by sun photometers are used in atmospheric,...
Briefs: Physical Sciences
Hamler Test and Analysis (HTA) provides testing, design, and finite-element analysis (FEA) consulting services, specializing in vibration measurement and experimental vibration...
Briefs: Physical Sciences
Dynamic Stability and Gravitational Balancing of Multiple Extended Bodies
Feasibility of a non-invasive compensation scheme was analyzed for precise positioning of a massive extended body in free fall using gravitational forces influenced by surrounding source masses in close proximity. The N-body problem of classical mechanics is a paradigm used...
Briefs: Information Technology
Simulation of Stochastic Processes by Coupled ODE-PDE
A document discusses the emergence of randomness in solutions of coupled, fully deterministic ODE-PDE (ordinary differential equations-partial differential equations) due to failure of the Lipschitz condition as a new phenomenon. It is possible to exploit the special properties of ordinary...
Briefs: Electronics & Computers
Cluster Inter-Spacecraft Communications
A document describes a radio communication system being developed for exchanging data and sharing data-processing capabilities among spacecraft flying in formation. The system would establish a high-speed, low- latency, deterministic loop communication path connecting all the spacecraft in a cluster. The...
Briefs: Mechanical & Fluid Systems
Low-Impact Mating System for Docking Spacecraft
A document describes a low-impact mating system suitable for both docking (mating of two free-flying spacecraft) and berthing (in which a robot arm in one spacecraft positions an object for mating with either spacecraft). The low-impact mating system is fully androgynous: it mates with a copy of...
Briefs: Physical Sciences
Non-Destructive Evaluation of Materials via Ultraviolet Spectroscopy
A document discusses the use of ultraviolet spectroscopy and imaging for the non-destructive evaluation of the degree of cure, aging, and other properties of resin-based composite materials. This method can be used in air, and is portable for field use. This method operates in...
Briefs: Physical Sciences
Gold-on-Polymer-Based Sensing Films for Detection of Organic and Inorganic Analytes in the Air
A document discusses gold-on-polymer as one of the novel sensor types developed for part of the sensor development task. Standard polymer- carbon composite sensors used in the JPL Electronic Nose (ENose) have been modified by evaporating 15 nm of metallic...
Briefs: Information Technology
Genetic Algorithm Optimizes Q-LAW Control Parameters
A document discusses a multi-objective, genetic algorithm designed to optimize Lyapunov feedback control law (Q-law) parameters in order to efficiently find Pareto- optimal solutions for low-thrust trajectories for electronic propulsion systems. These would be propellant-optimal solutions for a...
Briefs: Software
Quantum-Inspired Maximizer
A report discusses an algorithm for a new kind of dynamics based on a quantum-classical hybrid-quantum-inspired maximizer. The model is represented by a modified Madelung equation in which the quantum potential is replaced by different, specially chosen "computational" potential. As a result, the dynamics attains both...
Briefs: Photonics/Optics
A fiber-optic sensor system has been developed that can remotely measure the concentration of molecular oxygen (O2), nitrogen (N2), hydro- carbon vapor,...
Briefs: Photonics/Optics
MACOS Version 3.31
Version 3.31 of Modeling and Analysis for Controlled Optical Systems (MACOS) has been released. MACOS is an easy-to-use computer program for modeling and analyzing the behaviors of a variety of optical systems, including systems that have large, segmented apertures and are aligned with the technology of wavefront sensing and...
Briefs: Photonics/Optics
A theoretical analysis of photon-arrival jitter in an optical pulse-position-modulation (PPM) communication channel has been performed, and now constitutes the basis of a methodology for...
Briefs: Medical
Hand-Held Units for Short-Range Wireless Biotelemetry
Special-purpose hand-held radio- transceiver units have been proposed as means of short-range radio powering and interrogation of surgically implanted microelectromechanical sensors and actuators. These units are based partly on the same principles as those of the units described in “Printed...
Briefs: Medical
Telemetry systems of a type that have been proposed for the monitoring of physiological functions in humans would include the following subsystems:
Surgically implanted or...
Briefs: Electronics & Computers
A proposed wireless- communication and data-processing system would exploit recent advances in radio- frequency identification devices (RFIDs) and software to establish information lifelines between...
Briefs: Mechanical & Fluid Systems
A lightweight, low-power camera dart has been designed and tested for context imaging of sampling sites and ground surveys from an aerobot or an orbiting spacecraft in a microgravity environment. The...
Briefs: Electronics & Computers
Electrostatically actuated nano- electromechanical switches based on carbon nanotubes have been fabricated and tested in a continuing effort to develop high-speed switches for a variety...
Briefs: Electronics & Computers
A power converter now undergoing development is required to operate at a DC input potential ranging between 5.5 and 10 kV and a DC output potential of 400 V at a current up to 25 A. This...
Briefs: Electronics & Computers
The figure shows a prototype radial power-combining waveguide structure, capable of operation at frequencies from 31 to 36 GHz, that features an unusually large number (N = 24) of combining...
Briefs: Electronics & Computers
A submillimeter-wave monolithic integrated- circuit (S-MMIC) amplifier has been designed and fabricated using an indium phosphide (InP) 35-nm gate-length high electron mobility transistor (HEMT)...
Briefs: Electronics & Computers
All-solid-state electrochemical power cells have been fabricated and tested in a continuing effort to develop batteries for instruments for use in environments as hot as 500 °C. Batteries of this...
Briefs: Manufacturing & Prototyping
During the first decade of direct metal laser-sintering (DMLS), the metals employed were generally ones developed specifically for DMLS, rather than those used in traditional metalforming methods. But in...
Briefs: Manufacturing & Prototyping
A microfluidic system has been designed to survive spaceflight and to function autonomously on the Martian surface. It manipulates microscopic quantities of liquid water and...
Briefs: Manufacturing & Prototyping
Fabricating High-Resolution X-Ray Collimators
A process and method for fabricating multi-grid, high-resolution rotating modulation collimators for arcsecond and sub-arcsecond x-ray and gamma-ray imaging involves photochemical machining and precision stack lamination. The special fixturing and etching techniques that have been developed are used for...
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
