Briefs: Semiconductors & ICs
Thermally Resilient, Broadband Optical Absorber From UV to IR Derived From Carbon Nanostructures
Optical absorber coatings have been developed from carbon-based paints, metal blacks, or glassy carbon. However, such materials are not truly black and have poor absorption characteristics at longer wavelengths. The blackness of such coatings is...
Briefs: Information Technology
Verilog-A Device Models for Cryogenic Temperature Operation of Bulk Silicon CMOS Devices
Verilog-A based cryogenic bulk CMOS (complementary metal oxide semiconductor) compact models are built for state-of-the-art silicon CMOS processes. These models accurately predict device operation at cryogenic temperatures down to 4 K. The models are...
Briefs: Information Technology
Rapid Process to Generate Beam Envelopes for Optical System Analysis
The task of evaluating obstructions in the optical throughput of an optical system requires the use of two disciplines, and hence, two models: optical models for the details of optical propagation, and mechanical models for determining the actual structure that exists in the...
Briefs: Information Technology
High-Performance, Multi-Node File Copies and Checksums for Clustered File Systems
Modern parallel file systems achieve high performance using a variety of techniques, such as striping files across multiple disks to increase aggregate I/O bandwidth and spreading disks across multiple servers to increase aggregate interconnect bandwidth. To...
Briefs: Information Technology
Space Operations Learning Center Facebook Application
The proposed Space Operations Learning Center (SOLC) Facebook module, initially code-named “Spaceville,” is intended to be an educational online game utilizing the latest social networking technology to reach a broad audience base and inspire young audiences to be interested in math,...
Briefs: Information Technology
Stiffness and Damping Coefficient Estimation of Compliant Surface Gas Bearings for Oil-Free Turbomachinery
Foil gas bearings are a key technology in many commercial and emerging oilfree turbomachinery systems. These bearings are nonlinear and have been difficult to analytically model in terms of performance characteristics such as load capacity,...
Briefs: Information Technology
Sampling and Reconstruction of the Pupil and Electric Field for Phase Retrieval
This technology is based on sampling considerations for a band-limited function, which has application to optical estimation generally, and to phase retrieval specifically. The analysis begins with the observation that the Fourier transform of an optical aperture...
Briefs: Information Technology
Rotorcraft Diagnostics
Health management (HM) in any engineering systems requires adequate understanding about the system’s functioning; a sufficient amount of monitored data; the capability to extract, analyze, and collate information; and the capability to combine understanding and information for HM-related estimation and decision-making....
Briefs: Information Technology
Recursive Branching Simulated Annealing Algorithm
This innovation is a variation of a simulated- annealing optimization algorithm that uses a recursive-branching structure to parallelize the search of a parameter space for the globally optimal solution to an objective. The algorithm has been demonstrated to be more effective at searching a...
Application Briefs: Software
NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, CA, has implemented Maple, MapleSim, and MapleNet modeling and simulation software from Maplesoft in its...
Briefs: Information Technology
Method for Pre-Conditioning a Measured Surface Height Map for Model Validation
This software allows one to up-sample or down-sample a measured surface map for model validation, not only without introducing any re-sampling errors, but also eliminating the existing measurement noise and measurement errors. Because the re-sampling of a surface map...
Application Briefs: Software
Rendering Software Helps NASA’s Conceptual Image Lab Bring Science to the Public
NASA’s Conceptual Image Lab (CIL) at Goddard Space Flight Center in Greenbelt, MD, solves problems for scientists and astronomers who are tasked with bringing hard science to the public. Breaking down complicated concepts into a stream of easily digestible...
Products: Electronics & Computers
Data Translation, Marlboro, MA, has released the DT9862S high-speed simultaneous USB data acquisition module that offers a bandwidth of 300 MHz with crystal-controlled sampling for low-jitter applications. An external clock input...
News: Green Design & Manufacturing
A study of over four million absorbent minerals has determined that industrial minerals called zeolites could help electricity producers slash as much as 30 percent of the parasitic...
News: Energy
Berkeley Lab scientists have developed a way to generate power using harmless viruses that convert mechanical energy into electricity. Their generator is the first to produce electricity by harnessing the...
News: Sensors/Data Acquisition
University of California, Berkeley researchers have developed a genetic sensor that enables bacteria to adjust their gene expression in response to varying levels of key intermediates for making...
News: Defense
Airborne Radar is Readied for Missile Defense Testing
A new air defense radar system is undergoing testing on the White Sands Missile Range to prepare it for later integrated testing with the Navy this fall. The Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System (JLENS) is an advanced radar system intended for use by the...
News: Energy
Copper is one of the few metals that can turn carbon dioxide into hydrocarbon fuels with relatively little energy, but it is temperamental and easily oxidized. MIT researchers...
Articles: Energy
The lead-acid battery was invented by the French physicist Gaston Planté in 1859, and is one of the oldest rechargeable battery technologies. For over 150 years, it has been the mainstay...
Articles: Lighting
Though often drowned out by the excitement generated by general illumination LEDs, LED backlighting technology has evolved dramatically over the past 30 years. Continued advances in design and performance have allowed each...
Articles: Lighting
For more than half a century, the semiconductor industry has been governed by a commonly known principle described as Moore’s Law. This “law” predicts that through technological advancement a...
Articles: Lighting
After Nick Holonyak invented the practical visible LED in 1962, the first commercial products were limited in brightness and only to applications such as red indicator lights and seven segment displays. In...
Briefs: Lighting
These displays could play crucial roles in ultra-portable products such as next-generation pico-projectors and in emerging fields such as biophotonics and...
Briefs: Information Technology
Absolute Position of Targets Measured Through a Chamber Window Using Lidar Metrology Systems
Lidar is a useful tool for taking metrology measurements without the need for physical contact with the parts under test. Lidar instruments are aimed at a target using azimuth and elevation stages, then focus a beam of coherent, frequency modulated...
Briefs: Electronics & Computers
On-Wafer Measurement of a Multi-Stage MMIC Amplifier With 10 dB of Gain at 475 GHz
JPL has measured and calibrated a WR2.2 waveguide wafer probe from GGB Industries in order to allow for measurement of circuits in the 325–500 GHz range. Circuits were measured, and one of the circuits exhibited 10 dB of gain at 475 GHz.
Briefs: Software
Software to Control and Monitor Gas Streams
This software package interfaces with various gas stream devices such as pressure transducers, flow meters, flow controllers, valves, and analyzers such as a mass spectrometer. The software provides excellent user interfacing with various windows that provide time-domain graphs, valve state buttons,...
Briefs: Information Technology
Anomaly Detection in Test Equipment via Sliding Mode Observers
Nonlinear observers were originally developed based on the ideas of variable structure control, and for the purpose of detecting disturbances in complex systems. In this anomaly detection application, these observers were designed for estimating the distributed state of fluid flow in...
Briefs: Electronics & Computers
Fast and Adaptive Lossless Onboard Hyperspectral Data Compression System
Modern hyperspectral imaging systems are able to acquire far more data than can be downlinked from a spacecraft. Onboard data compression helps to alleviate this problem, but requires a system capable of power efficiency and high throughput. Software solutions have limited...
Briefs: Electronics & Computers
Iridium Interfacial Stack — IrIS
Iridium Interfacial Stack (IrIS) is the sputter deposition of high-purity tantalum silicide (TaSi2-400 nm) / platinum (Pt-200 nm) / iridium (Ir-200 nm) / platinum (Pt- 200 nm) in an ultra-high vacuum system followed by a 600 ºC anneal in nitrogen for 30 minutes. IrIS simultaneously acts as both a bond metal...
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