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Briefs: Information Technology
Tropospheric Emission Spectrometer Product File Readers
TES Product File Reader software extracts data from publicly available Tropospheric Emission Spectrometer (TES) HDF (Hierarchical Data Format) product data files using publicly available format specifications for scientific analysis in IDL (interactive data language). In this innovation, the...
Briefs: Information Technology
Reporting Differences Between Spacecraft Sequence Files
A suite of computer programs, called “seq diff suite,” reports differences between the products of other computer programs involved in the generation of sequences of commands for spacecraft. These products consist of files of several types: replacement sequence of events (RSOE), DSN...
Briefs: Software
Coordinating “Execute” Data for ISS and Space Shuttle
The Joint Execute Package Development and Integration tool is a Web utility program that provides an integrated capability to generate and manage messages and “execute” package data for members of a space shuttle and the International Space Station (ISS). (An “execute” package...
Briefs: Materials
Database for Safety-Oriented Tracking of Chemicals
SafetyChem is a computer program that maintains a relational database for tracking chemicals and associated hazards at Johnson Space Center (JSC) by use of a Web-based graphical user interface. The SafetyChem database is accessible to authorized users via a JSC intranet. All new chemicals pass...
Briefs: Manufacturing & Prototyping
Inflatable tubular structures that have annular cross sections rigidized with foams, and the means of erecting such structures in the field, are undergoing development. Although the development...
Briefs: Materials
Optimized Li-Ion Electrolytes Containing Fluorinated Ester Co-Solvents
A number of experimental lithium-ion cells, consisting of MCMB (meso-carbon microbeads) carbon anodes and LiNi0.8Co0.2O2 cathodes, have been fabricated with increased safety and expanded capability. These cells serve to verify and demonstrate the reversibility, low-temperature...
Briefs: Materials
Probabilistic Multi-Factor Interaction Model for Complex Material Behavior
Complex material behavior is represented by a single equation of product form to account for interaction among the various factors. The factors are selected by the physics of the problem and the environment that the model is to represent. For example, different factors...
Briefs: Mechanical & Fluid Systems
Long tool bits are undergoing development that can be stowed compactly until used as rock- or ground-penetrating probes actuated by ultrasonic/sonic mechanisms. These bits are...
Briefs: Mechanical & Fluid Systems
A compact, high-current, hollow cathode utilizing a lanthanum hexaboride (LaB6) thermionic electron emitter has been developed for use with high-power Hall thrusters and ion thrusters. LaB6cathodes are...
Briefs: Mechanical & Fluid Systems
This innovation has been developed to improve the resolutions of future spacebased active and passive microwave antennas for earth-science remote sensing...
Briefs: Mechanical & Fluid Systems
Rapid Active Sampling Package
A field-deployable, battery-powered Rapid Active Sampling Package (RASP), originally designed for sampling strong materials during lunar and planetary missions, shows strong utility for terrestrial geological use. The technology is proving to be simple and effective for sampling and processing materials of strength....
Briefs: Mechanical & Fluid Systems
Miniature Lightweight Ion Pump
This design offers a larger surface area for pumping of active gases and reduces the mass of the pump by eliminating the additional vacuum enclosure. There are three main components to this ion pump: the cathode and anode pumping elements assembly, the vacuum enclosure (made completely of titanium and used as the...
Briefs: Physical Sciences
A method of relatively safe, compact, efficient recharging of a high-pressure room-temperature gas supply has been proposed. In this method, the gas would be liquefied at the source for...
Briefs: Physical Sciences
A Raman lidar system for measuring the vertical distribution of water vapor in the atmosphere is located at the Table Mountain Facility (TMF) in California. Raman lidar systems for...
Briefs: Physical Sciences
Global measurement of terrestrial snow cover is critical to two of the NASA Earth Science focus areas: (1) climate variability and change and (2) water and...
Briefs: Information Technology
A method has been developed of computing bounds on the performance of a code comprised of two linear binary codes generated by two encoders serially concatenated through an interleaver....
Briefs: Information Technology
Mission Reliability Estimation for Repairable Robot Teams
A mission reliability estimation method has been designed to translate mission requirements into choices of robot modules in order to configure a multi-robot team to have high reliability at minimal cost. In order to build cost- effective robot teams for long-term missions, one must be able...
Briefs: Information Technology
Algorithm for Stabilizing a POD-Based Dynamical System
This algorithm provides a new way to improve the accuracy and asymptotic behavior of a low-dimensional system based on the proper orthogonal decomposition (POD). Given a data set representing the evolution of a system of partial differential equations (PDEs), such as the Navier-Stokes equations...
Briefs: Information Technology
Parameterizing Coefficients of a POD-Based Dynamical System
A method of parameterizing the coefficients of a dynamical system based of a proper orthogonal decomposition (POD) representing the flow dynamics of a viscous fluid has been introduced. (A brief description of POD is presented in the immediately preceding article.) The present...
Briefs: Information Technology
Confidence-Based Feature Acquisition
Confidence-based Feature Acquisition (CFA) is a novel, supervised learning method for acquiring missing feature values when there is missing data at both training (learning) and test (deployment) time. To train a machine learning classifier, data is encoded with a series of input features describing each item....
Briefs: Information Technology
A recently developed algorithm for demodulation and decoding of a pulse-position-modulation (PPM) signal is suitable as a basis for designing a single hardware decoding apparatus to be capable of handling...
Briefs: Information Technology
Metal Vapor Arcing Risk Assessment Tool
The Tin Whisker Metal Vapor Arcing Risk Assessment Tool has been designed to evaluate the risk of metal vapor arcing and to help facilitate a decision toward a researched risk disposition. Users can evaluate a system without having to open up the hardware. This process allows for investigating components at...
Briefs: Manufacturing & Prototyping
A two-fluid accumulator has been designed, built, and demonstrated to provide an acceptably close approximation to constant differential static pressure between two fluids over the full...
Briefs: Energy
A proposed scheme for generating electric power from rivers and from ocean currents, tides, and waves is intended to offer economic and environmental advantages over prior such...
Briefs: Green Design & Manufacturing
Nitrous Oxide/Paraffin Hybrid Rocket Engines
Nitrous oxide/paraffin (N2OP) hybrid rocket engines have been invented as alternatives to other rocket engines — especially those that burn granular, rubbery solid fuels consisting largely of hydroxyl-terminated polybutadiene (HTPB). Originally intended for use in launching spacecraft, these engines...
Briefs: Imaging
The Electrical Capacitance Volume Tomography (ECVT) system has been designed to complement the tools created to sense the presence of water in nonconductive spacecraft...
Briefs: Physical Sciences
A machine-vision system capable of detecting obstacles large enough to damage or trap a robotic vehicle is undergoing development. The system includes (1) a pattern generator that...
Briefs: Imaging
Wavefront Control and Image Restoration With Less Computing
PseudoDiversity is a method of recovering the wavefront in a sparse- or segmented-aperture optical system typified by an interferometer or a telescope equipped with an adaptive primary mirror consisting of controllably slightly moveable segments. (PseudoDiversity should not be confused...
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