Special Coverage

NASA Supercomputer Simulations Reveal 'Noisy' Aerodynamics
Robotic Gripper Cleans Up Space Debris
Soft Robot “Walks” on Any Terrain
Defense Advanced Research Projects Agency
Using Microwaves to Produce High-Quality Graphene
Transducer-Actuator Systems for On-Machine Measurements and Automatic Part Alignment
Wide-Area Surveillance Using HD LWIR Uncooled Sensors
Heavy Lift Wing in Ground (WIG) Cargo Flying Boat
Technique Provides Security for Multi-Robot Systems
Bringing New Vision to Laser Material Processing Systems
NASA Tests Lasers’ Ability to Transmit Data from Space

Designing LED Lighting for Commercial Applications

As specifiers and end users began moving away from incandescent lighting three decades ago, they started utilizing high intensity discharge (HID) and compact fluorescent (CFL) lamps and fixtures for most commercial lighting applications. The inherent characteristics of these light sources prevents them from generating effective lighting in the desired areas, which creates wasted energy due to much of the light getting trapped inside the fixture.

Posted in: Articles, Lighting, Exterior lighting, Design processes, Light emitting diodes (LEDs), Light emitting diodes (LEDs), Interior lighting, Interior lighting

Efficient Thermal Simulation for Advanced LED Designs

A successful LED system design must be able to transfer the active device’s heat efficiently from its own PN junction to the ambient. This path includes the printed circuit board on which the LED is mounted and the enclosure and/or heatsink. The designer must confirm that housings and shrouds participate efficiently in maintaining a good operating temperature.

Posted in: Articles, Lighting, Computer simulation, Light emitting diodes (LEDs), Light emitting diodes (LEDs), Thermal testing

Scientists Invent New Material for Warm-White LEDs

Light emitting diodes (LEDs) are known for their energy efficiency and durability, but the bluish, cold light of current white LEDs has precluded their widespread use for indoor lighting. Now, University of Georgia scientists have fabricated what is thought to be the world's first LED that emits warm white light using a single light emitting material, or phosphor, with a single emitting center for illumination.

Posted in: Articles, News, Lighting, Light emitting diodes (LEDs), Light emitting diodes (LEDs), Interior lighting, Interior lighting, Materials properties

Researchers Identify Links Between Visibility and Safety From Roadway 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 and where to install roadway illumination is a challenge for transportation agencies.

Posted in: Articles, News, Lighting, Exterior lighting, Cost analysis, Research and development, Safety testing and procedures, Visibility

Looking Under the Hood of a Military Power Supply

There are power supplies in virtually every military electronic system. These ubiquitous devices come in all sizes and power ratings. And just like their commercial counterparts, they are available in the AC/DC, DC/DC and DC/AC configurations that provide the appropriate electrical energy to operate the electronics.

Posted in: Articles, Articles, Electronics & Computers, Power electronics, Power electronics, Electric power, Military vehicles and equipment

Hybrid Stepper Advancements Improve Medical Pump Performance

Designers of medical pumps often have to deal with the challenge of implementing precise, yet low-cost motion control. For most medical pumps, there are three basic technology alternatives for implementing such electronic motion control: permanent magnet brush DC motors, brushless DC motors, or step motors. Step motors (sometimes called stepping motors, stepper motors, or simply steppers) are a solid choice for position or speed control. Steppers are inherently digital — a pulse applied to the drive electronics results in a shaft movement of one step. They are commonly used “open loop,” meaning without feedback, due to their ability to achieve the desired number of steps every time (if sized properly). The number of incoming pulses and the rate at which they are fed can be used to implement very precise, yet very simple motion (position, speed, and acceleration) control. As long as the speeds required are not too high (less than 3000 RPM, typically), steppers often offer a far simpler, lower-cost, and maintenance- free alternative.

Posted in: Articles, Motion Control, Hybrid power, Medical equipment and supplies, Pumps, Electric motors

INDUSTRY UPDATE: Design and PLM Software

Embracing Mobility

When asked about how their customers are embracing the idea of using CAD online, in the cloud, or on mobile devices, most of our executives indicated that while customers are expressing interest in accessing models and files via these means, there is some hesitation.

Posted in: Articles, Computer-Aided Design (CAD), CAD / CAM / CAE, CAD, CAM, and CAE, Cloud computing, Internet, Cloud computing, Internet, Market research

Technology Highlights from 2013 International CES

Tobii Technology
Tobii REX

Users of the Tobii Technology REX, a USB-connected peripheral, may want to be careful about rolling their eyes. REX, a device that can be placed on the base of a computer screen, relies on eye positioning for navigation, page management, and access to other screen content. The mouse can still be used while the eye-tracker handles movements.

Posted in: Articles, Electronics, Consumer Product Manufacturing, Electronic equipment, Electronic equipment, Product development, Technical reference, Technical review

Retrofits Convert Gas Vehicles into Hybrids

One initiative at Glenn Research Center, the Hybrid Power Management (HPM) program, focused on joining new and mature technologies for optimal power systems applications in space and on Earth, with the goal not only to develop ultra-efficient space power systems, but also to advance HPM to address global energy issues.

Posted in: Articles, Energy, Hybrid power

Trends In Fused Components For Fiber Lasers

High-power fiber lasers have been increasingly used for material processing, metal cutting, and welding applications due to high wall-plug efficiency, compactness, and superb long term reliability[ 1, 2]. Fused fiber components enable reliable, efficient, high-power fiber laser systems operating in continuous wave (high power) or pulsed regimes such as ultrafast (high peak power).

Posted in: Features, Articles, Photonics, Fiber optics, Lasers, Fiber optics, Lasers

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