Keyword: Logistics

Briefs: Software
Object-Oriented Multidisciplinary Design, Analysis, and Optimization Tool

An Object-Oriented Optimization (O3) tool was developed that leverages existing tools and practices, and allows the easy integration and adoption of new state-of-the-art software. At the heart of the O3 tool is the Central Executive Module (CEM),...

Briefs: Energy

An important aspect of wind power plant impact studies is to evaluate the short-circuit current (SCC) contribution of the plant into the...

Articles: Imaging

Machine vision combines a range of technologies to provide useful outputs from the acquisition and analysis of images. Used primarily for inspection and robot guidance, the process...

Briefs: Electronics & Computers
Early Oscillation Detection Technique for Hybrid DC/DC Converters

Oscillation or instability is a situation that must be avoided for reliable hybrid DC/DC converters. A real-time electronics measurement technique was developed to detect catastrophic oscillations at early stages for hybrid DC/DC converters. It is capable of identifying low-level...

Briefs: Physical Sciences
Wind and Temperature Spectrometry of the Upper Atmosphere in Low-Earth Orbit

Wind and Temperature Spectrometry (WATS) is a new approach to measure the full wind vector, temperature, and relative densities of major neutral species in the Earth’s thermosphere. The method uses an energy-angle spectrometer moving through the tenuous upper...

Application Briefs: Imaging

For five years, Michael Lunoe, President of Zorg Industries, had been in need of a camera system that could identify objects and provide accurate distance from the rear of a vehicle.

Articles: Energy

Given that solar-photovoltaic (PV) generating technology has been around for decades, one might think its general application in commercial and consumer circles might be a little more...

Articles: Lighting

Industry professionals and researchers engaged in the measurement and characterization of light sources are confronted by the age old question — should an instrument be utilized which employs...

Briefs: Electronics & Computers
On-Wafer S-Parameter Measurements in the 325-508-GHz Band

New circuits have been designed and fabricated with operating frequencies over 325 GHz. In order to measure S-parameters of these circuits, an extensive process of wafer dicing and packaging, and waveguide transition design, fabrication, and packaging would be required. This is a costly...

Briefs: Software
RAPID: Collaborative Commanding and Monitoring of Lunar Assets

RAPID (Robot Application Programming Interface Delegate) software utilizes highly robust technology to facilitate command-ing and monitoring of lunar assets. RAPID provides the ability for intercenter communication, since these assets are developed in multiple NASA centers.

Briefs: Physical Sciences
Local Leak Detection and Health Monitoring of Pressurized Tanks

An optical gas-detection sensor safely monitors pressurized systems (such as cryogenic tanks) and distribution systems for leaks. This sensor system is a fiber-coupled, solid optical body interferometer that allows for the miniaturized sensing element of the device to be placed in...

Briefs: Physical Sciences
Single-Antenna Temperature- and Humidity-Sounding Microwave Receiver

For humidity and temperature sounding of Earth’s atmosphere, a single-antenna/LNA (low-noise amplifier) is needed in place of two separate antennas for the two frequency bands. This results in significant mass and power savings for GeoSTAR that is comprised of hundreds of...

Briefs: Electronics & Computers
Reliability of Ceramic Column Grid Array Interconnect Packages Under Extreme Temperatures

A paper describes advanced ceramic column grid array (CCGA) packaging interconnects technology test objects that were subjected to extreme temperature thermal cycles. CCGA interconnect electronic package printed wiring boards (PWBs) of polyimide were...

Briefs: Information Technology
Prioritized LT Codes

The original Luby Transform (LT) coding scheme is extended to account for data transmissions where some information symbols in a message block are more important than others. Prioritized LT codes provide unequal error protection (UEP) of data on an erasure channel by modifying the original LT encoder. The prioritized...

Briefs: Manufacturing & Prototyping

A lens that enables microscopic objects to be seen from nine different angles at once to create a 3D image has been developed. Other 3D microscopes use multiple lenses or cameras...

Articles: Lighting

Semiconductor-based light-emitting diode (LED) devices first appeared in the 1960s. Today, with the advances in materials, design, and manufacture of LED devices, we are seeing a wide spectrum of LEDs that are cheaper,...

Briefs: Lighting

Early phosphor-converted white light-emitting diodes (LEDs) produced light with poor color characteristics in terms of color rendering index (CRI) and correlated color...

Briefs: Green Design & Manufacturing
Grid-Tied Photovoltaic Power System

A grid-tied photovoltaic (PV) power system is connected directly to the utility distribution grid. Facility power can be obtained from the utility system as normal. The PV system is synchronized with the utility system to provide power for the facility, and excess power is provided to the utility.

Briefs: Semiconductors & ICs
Source-Coupled, N-Channel, JFET-Based Digital Logic Gate Structure Using Resistive Level Shifters

A circuit topography is used to create usable, digital logic gates using N (negatively doped) channel junction field effect transistors (JFETs), load resistors, level shifting resistors, and supply rails whose values are based on the DC parametric...

Briefs: Software
Coded Modulation in C and MATLAB

This software, written separately in C and MATLAB as stand-alone packages with equivalent functionality, implements encoders and decoders for a set of nine error-correcting codes and modulators and demodulators for five modulation types. The software can be used as a single program to simulate the performance of...

Briefs: Energy

CgWind is a new, high-fidelity simulation tool designed to meet the modeling requirements of advanced wind energy resources. These new resources, targeting 20% of the US...

Briefs: Electronics & Computers
Power-Combined GaN Amplifier With 2.28-W Output Power at 87 GHz

Future remote sensing instruments will require focal plane spectrometer arrays with higher resolution at high frequencies. One of the major components of spectrometers are the local oscillator (LO) signal sources that are used to drive mixers to down-convert received radio-frequency...

Application Briefs: Imaging

Nordson Asymtek, headquartered in Carlsbad, CA, provides automated fluid dispensing systems, which are used in the assembly and packaging of semiconductors, printed circuit boards, flat...

Briefs: Electronics & Computers
Feature Acquisition With Imbalanced Training Data

This work considers cost-sensitive feature acquisition that attempts to classify a candidate datapoint from incomplete information. In this task, an agent acquires features of the datapoint using one or more costly diagnostic tests, and eventually ascribes a classification label. A cost function...

Briefs: Manufacturing & Prototyping
Carbon Nanotube-Based Structural Health Monitoring Sensors

Carbon nanotube (CNT)-based sensors for structural health monitoring (SHM) can be embedded in structures of all geometries to monitor conditions both inside and at the surface of the structure to continuously sense changes. These CNTs can be manipulated into specific orientations to...

Articles: Lighting

Solid-state lighting (SSL) has been identified as a technology innovation that can significantly impact the future of lighting solutions that will meet new U.S. energy efficiency standards for...

Briefs: Physical Sciences
Photocatalytic Active Radiation Measurements and Use

Photocatalytic materials are being used to purify air, to kill microbes, and to keep surfaces clean. A wide variety of materials are being developed, many of which have different abilities to absorb various wavelengths of light. Material variability, combined with both spectral illumination...

Briefs: Software
Java Image I/O for VICAR, PDS, and ISIS

This library, written in Java, supports input and output of images and metadata (labels) in the VICAR, PDS image, and ISIS-2 and ISIS-3 file formats. Three levels of access exist.

Briefs: Mechanical & Fluid Systems

A system has been developed to acquire and handle samples from a suspended remote platform. The system includes a penetrator, a penetrator deployment mechanism, and a sample...

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