Keyword: Roads and highways

Briefs: Automotive
The technology could help call attention to important traffic information when it’s dark, with potential benefits for both drivers and pedestrians.
Briefs: Green Design & Manufacturing
The NASA study is a first step in developing a model to deploy in future disasters.
Briefs: Mechanical & Fluid Systems
Suppose you have 10 taxis in Manhattan. What portion of the borough’s streets do they cover in a typical day?
Articles: Electronics & Computers

The first mass-produced electric vehicles (EVs) hit the road late in 2010 with the introduction of the Nissan Leaf, which remains the world’s top-selling,...

Application Briefs: Test & Measurement

Concrete is the material most widely used by humans — after water. As its ingredients are readily available almost anywhere in the world, it is the main component used by...

Briefs: Materials

A new method increases the service life of concrete structures by reducing the infiltration rates of deleterious ions. The key is a nano-sized additive that slows down penetration of...

Articles: Photonics/Optics

The task of creating a streetlamp optical system has changed over the last 20 years and due to this change, so has optical design software. Let’s compare the task of...

Articles: Photonics/Optics

Imagine if every police car, bus, and garbage truck gathered important infrastructure data as they made their usual routes through the city.

In different field tests around the...

Application Briefs: Lighting

Light Efficient Design, a division of TADD, LLC, recently completed an LED retrofit project in the busy “Street of Dreams” retail area of the Monte Carlo Casino...

Briefs: Information Technology

In commercial aviation, there have been several recent cases of unstabilized approaches that have resulted in crash landings short of the runway. Some of the direst consequences of these incidents...

Briefs: Software
Design Environment for Multi-Fidelity and Multi-Disciplinary Components

Many of the most challenging aspects of propulsion system development are related to the prediction of interacting effects among fluid loads, thermal loads, and structural deflection. A typical design practice might ignore the interaction between the physical phenomena where...

Briefs: Physical Sciences
Noncontact DC and AC Magnetostrictive Current Sensor

At the time of this reporting, there have been no effective methods of monitoring current in conductors in space without breaking the circuit or making contact with the conductor. In space, reliability rules all designs, and breaking a circuit to insert a sensor to monitor current would reduce...

Briefs: Electronics & Computers
Multi-Tone, High-Frequency Synthesizer for CubeSat-Borne Beacon Transmitter for Radio Wave Atmospheric Propagation Studies

This report presents the design, construction, and test results of a novel multitone, multi-band, high-frequency synthesizer for application in a space-borne (including a CubeSat) beacon transmitter for radio wave...

Briefs: Manufacturing & Prototyping
Full-Cell Evaluation/Screening Technique for New Battery Chemistries

A quick and cost-effective evaluation/screening technique for new battery chemistries was developed that integrates the individual advanced cell component in a full-cell format to identify the critical issues, such as cell component interaction and compatibility before...

Application Briefs: Lighting

When the NRG power plant in El Segundo, Calif., was redesigned, two towers were demolished which caused extensive light from the plant to bother local neighbors. In an...

Briefs: Materials
Complex Geometry Multi-Use Coatings for Abrasion Prevention, Wear Resistance, and Lunar Dust Removal

Two coatings are required to remove/repel lunar dust particles from the mechanism or surface that needs protection. One coating must be a conductor, and one must be a dielectric. Tungsten carbide (WC) and aluminum oxide...

Briefs: Mechanical & Fluid Systems
Porous Media Jacket for Use in Regeneratively Cooled Rocket Engines

A paper describes a method for regeneratively cooling worst-case gas-phase thrusters using porous media integrated into a regenerative cooling jacket. The enhanced surface area in the jacket compensates for the much lower effective heat transfer coefficients of gases as compared...

Briefs: Physical Sciences
Interplanetary CubeSats

A report describes upgraded CubeSat satellite elements for the interplanetary environment, with solar sail propulsion and the interplanetary superhighway for navigation and maneuvering. They can host small, capable instruments and optical telecommunications on a mission to map the composition of a sequence of near-Earth...

Briefs: Imaging
Novel Hemispherical Dynamic Camera for EVAs

A novel optical design for imaging systems is able to achieve an ultra-wide field of view (UW-FOV) of up to 208°. The design uses an integrated optical design (IOD). The UW-FOV optics design reduces the wasted pixels by 49% when compared against the baseline fisheye lens. The IOD approach results in a...

Application Briefs: Lighting

The newly-renovated Church of the Covenant in Cleveland, Ohio, has a large, ornate rose stained-glass window that faces the Seidman Cancer Center at the University Hospitals Case Medical Center...

Briefs: Software
“Ascent — Commemorating Shuttle” for iPad

A feature-added, interactive version of the video release entitled “Ascent” was developed. The software version contains the full HD (high definition) movie along with extra scenes, still imagery, a movie trailer, and producer notes. The software has been packed as an iOS app, intended for use...

Briefs: Manufacturing & Prototyping
Thermo-Mechanical Methodology for Stabilizing Shape Memory Alloy Response

This innovation is capable of significantly reducing the amount of time required to stabilize the strain-temperature response of a shape memory alloy (SMA). Unlike traditional stabilization processes that take days to weeks to achieve stabilized response, this innovation...

Research News: Lighting

Crash risks while driving at night are higher than during the daytime, but most roadways in the U.S. do not have roadway lighting. In fact, many state and local governments find...

Briefs: Physical Sciences
Multimode Directional Coupler for Utilization of Harmonic Frequencies From TWTAs

A novel waveguide multimode directional coupler (MDC) intended for the measurement and potential utilization of the second and higher order harmonic frequencies from high-power traveling wave tube amplifiers (TWTAs) has been successfully designed, fabricated, and...

Briefs: Materials
High-Performance, Low-Temperature-Operating, Long-Lifetime Aerospace Lubricants

The synthesis and characterization of six new ionic liquids, with fluoroether moeties on the imidazolium ring, each with vapor pressures shown to be

Application Briefs: Lighting

Streetlights illuminate the night, shining upon roadways and sidewalks across the world, but these ubiquitous elements of the urban environment are notoriously inefficient and major...

Briefs: Information Technology
Software Method for Computed Tomography Cylinder Data Unwrapping, Re-slicing, and Analysis

A software method has been developed that is applicable for analyzing cylindrical and partially cylindrical objects inspected using computed tomography (CT). This method involves unwrapping and re-slicing data so that the CT data from the cylindrical...

Research News: Lighting

Newspapers are filled with stories describing reductions and removal of street lighting in order to reduce municipal costs. Tackling the tricky questions of when...

Products: Lighting

Littelfuse, Inc. (Chicago, IL) has developed a new line of open LED protectors optimized to provide superior protection against open LEDs. The PLED6M Series LED protector is designed to provide a switching electronic...