Features

Briefs : Communications
E-Textile Antenna Tuning Stitches

A variety of antenna tuning techniques exist for conventionally constructed antenna structures, such that when an antenna is converted from a design to an actual fabricated structure, slight adjustments can be made to the fabricated structure to match the performance expected from the design. For microstrip...

Briefs : Communications
Protograph-Based LDPC Bit-Interleaved Coded Modulation

Bandwidth and power-coded modulation schemes are very desirable for many applications in high-data-rate transmission over a given allocated bandwidth. The goal is to design such coded modulation system for a given throughput with the lowest possible signal-to-noise ratio for not only a...

Briefs : Communications
Flight Imagery Recorder Locator (FIRLo) and High-Temperature Radome

LDSD (Low Density Supersonic Decelerator) is a Mars EDL (entry, descent, and landing) Technology Development Project that launches three test vehicles out of the Pacific Missile Range Facility in Kauai. On the test vehicle, most mission science data can be recorded safely on...

Articles : Communications
Multiparty Policy Negotiation Engine

Policy negotiation is the process of determining the “best” communication protocol that satisfies all requirements of all parties involved. The main challenge here is how to reconcile the various (and possibly conflicting) communications protocols used by different parties. The solution must use protocols...

Briefs : RF & Microwave Electronics
A Continuous-Flow, Microfluidic, Microwave-Assisted Chemical Reactor

In industrial synthetic chemistry laboratories, reactions are generally carried out using batch-mode methodologies, stepwise reactions, and purifications to generate a final product. Each step has an associated yield of both the reaction itself and of the final purification...

Articles : Sensors/Data Acquisition
High-Resolution Data Acquisition System Enables Reliable Engine Parameter Measurements

Data acquisition plays a critical role in improving vehicle component performance and overall system reliability. Measuring engine parameters, including engine cranking speed and the mechanical condition of the engine, requires high-resolution data acquisition...

Briefs : Test & Measurement
Guarded Flat Plate Insulation Test Cryostat

The guarded flat plate insulation test cryostat (Cryostat-500) is a boil-off calorimeter comprising a flat-bottom test apparatus for measuring the absolute thermal performance of an insulation test article. Typical dimensions allow accepting test specimens 200 mm in diameter by up to 30 mm thick. The...

Articles : Materials
High-Performance Polyimide Powder Coatings

Powder coatings are used throughout industry to paint a myriad of metallic objects. This method of coating has gained popularity because of its conservation of materials and elimination of volatile organic compounds (VOCs). Resins used in powder coatings are traditionally chosen from those that have low...

Briefs : Materials
Selective Functionalization of Carbon Nanotubes

This invention is a process by which carbon nanotubes can be chemically functionalized according to their precise electronic structure. The process involves an exploitation of charge transfer stability at the nanotube sidewall to direct selective reaction of certain electronic structures over...

Briefs : Materials
Predictive Modeling of Corrosion Efficiencies and Toxicities

Atmospheric corrosion is significantly accelerated by the presence of heat, humidity, corrosive salts, and sunlight. At Kennedy Space Center (KSC), all of these accelerants are present, producing an extremely corrosive environment. Toxicity and environmental impacts of some inorganic...

Articles : Materials
Improving Foreign Object Damage Performance for 2D Woven Ceramic Matrix Composites

As the power density of advanced engines increases, the need for new materials that are capable of high operating temperatures, such as ceramic matrix composites (CMCs), is critical for turbine hot-section static and rotating components. Such advanced materials...

Briefs : Software
Enhanced Project Management Tool

A complex project having many tasks and sub-tasks, many phases, and many workers will often require an evaluation of completion of the tasks and sub-tasks at several times during the project’s duration. Initially and throughout the duration, suitability of the technical and inter-personal characteristics of the...

Articles : Information Technology
Advanced Navigation Strategies for Asteroid Sample Return Missions

Sample-return missions to primitive solar system bodies (asteroids, comets, and planetary satellites) can provide a wealth of scientific information and insight into the composition and origins of the solar system. Recent interest in primitive body missions has been driven by the...

Articles : Software
Half-Cycle Crack Growth

Half-Cycle Crack Growth software offers a reliable method for calculating theoretical fatigue crack growths that could lead to catastrophic structural component failures. The program builds upon and integrates Armstrong’s proven half-cycle and closed-form aging theories, and considers every half-cycle of loading spectra...

Articles : Information Technology
NASA Visualization Explorer

NASA Visualization Explorer (NASA Viz) is an intuitive, interactive iOS application (app) that delivers science stories with multimedia content linking high-quality explorable images, descriptive text, visualizations, videos, and interviews with a fresh look and feel. NASA Viz aims to excite a wide audience about...

Articles : Information Technology
Simple Safe Site Selection (S4) Algorithm

This hazard avoidance algorithm uses a single flash lidar range image to select a safe landing site for NASA missions. The advantage of flash lidar is that the entire range image is captured instantaneously, and therefore, is trajectory-independent. This is unlike a scanning lidar on a moving vehicle,...

Briefs : Software
Fast Classification Method for Multivariate Mixtures of Spectroscopic Responses

In many fields of spectroscopy, classification of the measured multivariate response is not always a straightforward process. Accurate classification is limited by many factors that are highly dependent upon the spectroscopy method being utilized. In all cases,...

Articles : Information Technology
Feature Database

The primary function of the Feature Database (FDB) is to contain information about all the ground features seen so far in a sequence of aerial images. This information is organized so that features can be efficiently located and tracked into later images. As each new image is processed, the database grows to include more images...

Articles : Information Technology
DRAT: A Distributed Release Audit Tool

DRAT software overcomes limitations inherent in the Apache Release Audit Tool (RAT), and also brings code auditing and open-source license analysis into the realm of Big Data by using scalable, open-source Apache technologies. Distributed RAT (DRAT) leverages Apache Tika to automatically detect and classify...

Articles : Photonics/Optics
Design of High-Brightness, Fiber-Coupled Diode Laser Modules

In the past decade, diode lasers have made great strides in both power and reliability. The performance improvements have enabled new applications, particularly in areas where optical brightness is a key performance metric. The fiber-coupled diode pumping of fiber lasers is a critical...

Articles : Photonics/Optics
SPIE Photonics West 2015 Preview

The SPIE Photonics West 2015 technical conference and exhibition, taking place February 7-12 at The Moscone Center in San Francisco, offers attendees the opportunity to learn about the latest technological developments in lasers, photonics, optics, optoelectronics, biophotonics, biomedical optics, 3D printing and...

Application Briefs : Photonics/Optics
Fabricating Custom Components from Stock Optics

Two quantities are perennially in short supply on engineering projects: time and money. When it comes to producing custom optical components in less time, for less money, one feasible approach is to modify off-the-shelf components to meet customers’ unique requirements. This tactic is...

Articles : Photonics/Optics
Active Layer Optimization in Ultra-Thin, Surface-Parallel, Deformable Mirrors

A design methodology was developed that optimizes the performance of active mirrors. Patterns of parameterized ellipsoidal actuators are overlaid onto the mirror, and then numerically optimized to improve performance of the mirror in optical modes that are typically...

Briefs : Physical Sciences
Monolithic Dual Telescope for Compact Biaxial Lidar

A document discusses the Ultra Compact Cloud Physics Lidar, a biaxial lidar with a narrow receiver field of view. It requires tight optical alignment between the transmitter and receiver paths while flying on various aircraft over various temperatures and in the presence of vibration. To...

Articles : Photonics/Optics
Passive Aerosol Cloud Suite

The Passive Aerosol Cloud Suite (PACS) is an imaging polarimeter that employs wide field-of-view (FOV) optics to obtain a highly accurate polarimetric signal across an image with hyperangle, multiangle views. PACS is designed to measure the array of parameters necessary to retrieve aerosol and cloud microphysical...

Who's Who
Susan Draper, Materials Research Engineer, Glenn Research Center, Cleveland, OH

Susan Draper performs microstructural analysis of metals and determines where fractures have occurred and propagated. Draper is currently characterizing electron-beam-melted, additive-manufactured titanium-6 aluminum-4 vanadium, a titanium alloy. Her team is...

Articles : Electronics & Computers
Enclosure Cooler

TECA Corp. (Chicago, IL) has introduced a powerful new thermoelectric air conditioner for enclosure cooling. The AHP-690 Model features compact dimensions and 55% more cooling capacity than coolers of similar size. As a closed loop enclosure cooler, the AHP-690 protects electronics from overheating in any environment. The...

Articles : Electronics & Computers
Rugged Android Tablet

ADLINK Technology (San Jose, CA) has released its new IMT-1 Android 4.2 tablet, integrating the TI OMAP5432 1.5GHz dual-core ARM A15 processor for high performance computing power. Built-in WLAN or optional WWAN connectivity enables the IMT-1 to easily access information in a wide variety of workplace scenarios. An IP54...

Articles : Electronics & Computers
Energy Metering MCUs

Atmel(R) Corporation (San Jose, CA) has expanded its Atmel | SMART portfolio of energy metering products with the introduction of the SAM4C32 dual-core secure MCU, along with the SAM4CMS32 and SAM4CMP32 for residential, commercial and industrial metering applications. The new system-on-chip (SoC) solutions have 2MB of...

Articles : Electronics & Computers
Protocol Analyzer

Keysight Technologies, Inc. (Santa Rosa, CA) has introduced the U4301B PCIe(R) protocol analyzer for engineers developing PCIe Gen3 systems. The U4301B supports all PCIe speeds from 2.5 GT/s (Gen1) through 8 GT/s (Gen3) and link widths from x1 through x16. The analyzer comes standard with analysis tools to validate PCIe LTSSM...

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