Briefs : Materials
Alkyl Pyrocarbonate Electrolyte Additives for Li-Ion Cells

Alkyl pyrocarbonates have been found to be useful as electrolyte additives for improving the low-temperature performances of rechargeable lithium-ion electrochemical cells. The beneficial effects of these and other additives have been investigated, along with various electrolyte...

Briefs : Materials
Fluorinated Alkyl Carbonates as Cosolvents in Li-Ion Cells

Partially fluorinated alkyl carbonate liquid compounds have been found to be excellent electrolyte cosolvents for rechargeable lithium-ion electrochemical cells. The benefits afforded by these and other ingredients of electrolyte solutions in rechargeable Li-ion cells have been...

Briefs : Materials
Diaminobenzoquinones as Corrosion-Inhibiting Additives

Non-polymeric N,N´-di-N-hydrocarbyl- 2,5-diamino-1,4-benzoquinones (where the hydrocarbyl substituents are alkyl or aryl) have been found to be useful as corrosion-inhibiting additives for paints and other conventional coating materials that are applied to steel and other metals. Prior...

Briefs : Electronics & Computers
Multiple-Cavity Masers as 32-GHz LNAs

Improved multiple-cavity ruby masers are under development for use as lownoise amplifiers (LNAs) for receiving very weak radio signals in frequency bands up to and including one centered approximately at 32 GHz. These masers were designed specifically to be incorporated into receivers in ground stations of...

Briefs : Software
Program for Tracking Air-Purification Cartridges

The Cartridge Automated Reliance Tracking (CART) computer program enables authorized requesters associated with NASA to gain access to the most recent tracking data on LiOH-based airpurification cartridges used during space-shuttle flights. CART could also be adapted to suit the needs of other...

Briefs : Software
Software for Implementing Fuzzy Logic on Microcontrollers

Fuzzy Inference System Translator (FIST) is a computer program that facilitates the implementation of fuzzy-logic software on commercial or other viable microcontrollers. In the original application for which FIST was developed, there was a need to implement plantgrowth- chamber (PGC)...

Briefs : Software
Software for Constructing a Facility-Management Database

Facility Management Tracking System (FMTS) is a computer program for constructing an integrated database that defines any event in a managed facility. FMTS provides a simple user interface for entering all relevant data connected to the event. The entered data, as displayed and processed...

Briefs : Software
Software Implements Telemetry Protocols

The CCSDS Telemetry and Telecom Software Library provides a reference implementation of the Consultative Committee for Space Data Systems (CCSDS) international protocol standard for the transmission and reception of telemetry and telecommand data in radio communications with spacecraft. The library...

Briefs : Software
Software for Parallel Processing of Telemetry

Parallel Telemetry Processor (PTEP) is a high-speed, robust, extensible, Javalanguage computer program that (1) enables the parallel processing of a serial stream of telemetric data and (2) generates a graphical display for monitoring the processing. Originally intended for application to spacecraft...

Briefs : Software
Software for Global Forecasting of Winds and Waves

The WorldWinds™ software system generates high-resolution global weather forecasts, with emphasis on wind and ocean-wave vectors, in nearly real time. WorldWinds™ was developed primarily to serve organizations and individuals needing accurate forecasts for scientific, safety, or economic...

Briefs : Software
Software for Modeling Spacecraft Electric Power

Multi-Mission Power Analysis Tool (MMPAT) is a computer program for constructing computational models of the generation, storage, consumption, and flow of electric power in a spacecraft. Heretofore, such modeling has been accomplished by means of unique software for each application. In contrast,...

Briefs : Mechanical & Fluid Systems
Pressure-Balanced, Low-Hysteresis Finger Seal

A second-generation design for a finger seal has been proposed to reduce a hysteretic effect that gives rise to increased leakage in a first-generation finger seal. As explained below, the second-generation design provides for balancing of pressure drops along the flow paths within the seal in such a...

Briefs : Mechanical & Fluid Systems
Instrument for Measuring Extreme Winds

An instrument is undergoing development for use in measuring both the horizontal direction and the horizontal speed of wind in the speed range from 60 to 300 mph (about 27 to 134 m/s) at a rate of at least 50 samples per second. The speed range of this instrument greatly exceeds that of conventional...

Briefs : Mechanical & Fluid Systems
Mechanized Harvesting of Plants in a Controlled Environment

The proposed Plant Harvesting Mechanization System (PHARMS) would comprise machinery and controls for semiautomated harvesting of plants grown in a controlled environment. The PHARMS was conceived as a prototype of harvesters to be incorporated into life-support systems of spacecraft...

Briefs : Mechanical & Fluid Systems
Emergency Landing Using Thrust Control and Shift of Weight

Normally, the damage that results in a total loss of the primary flight control of a transport airplane, including all the engines on one side, would be catastrophic. Dryden Flight Research Center has conceived of a method of responding to a total loss of hydraulic pressure and failure...