Special Coverage

Lightweight, Flexible Thermal Protection System for Fire Protection
High-Precision Electric Gate for Time-of-Flight Ion Mass Spectrometers
Polyimide Wire Insulation Repair System
Distributed Propulsion Concepts and Superparamagnetic Energy Harvesting Hummingbird Engine
Aerofoam
Wet Active Chevron Nozzle for Controllable Jet Noise Reduction
Magnetic Relief Valve
Active Aircraft Pylon Noise Control System
Unmanned Aerial Systems Traffic Management
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Medical Category Winner

XVIVO Organ Perfusion System Chris Jaynes, Tom Taccini, and Tim Klug, XVIVO Perfusion, Englewood, CO In the United States, only 15% of available donor lungs are transplanted into critical recipients due to the associated damage to the organs from the traumatic death event. The XVIVO Perfusion System (XPS) is a mobile intensive care unit that can repair damaged organs ex vivo (out of the donor’s body) for successful transplantation into a waiting recipient.

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Safety & Security Category Winner

AquaSonus Passive-Sonar Pool Alarm William C. Roberts, Bob Hoenig, and Paula Bailey, AquaSonus.com, Merrimack, NH Drowning is the second leading cause of death for children, and most drownings occur in residential swimming pools. The majority of pool alarms are based on water displacement technology. This technology relies on the waves that result from a child falling into the pool reaching the alarm’s trigger mechanism to sound an alarm. This approach results in a product that responds slowly and is prone to false alarm.

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Transportation Category Winner

Dynamic Aero-Shroud Oscillating Jet Rebecca Farr, Endwell Daso, Victor Pritchett, and Dr. Ten-See Wang, NASA Marshall Space Flight Center, Huntsville, AL Applying supersonic counter-flowing cold gas jets of a certain mass flow rate and pressure at the nose of a supersonic vehicle can reduce drag and aerodynamic heating, and possibly reshape sonic boom signatures.

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Sustainable Technologies Category Winner

TO:CMA Spherical Generator Angel Francisco Martinez, Delia Beatriz Martinez, and Trupti Bulbule, Cornell University, Ithaca, NY The TO:CMA Spherical Generator creates copious amounts of clean electricity out of ocean waves at costs below all major existing renewable energy sources. The design is based on the geometrical rearrangement of the Linear Inductance Permanent Magnet Generator (LIPMG). Three rings of concentric sizes and perpendicular arrangement are housed in a waterproof buoy that will transfer the force of the passing waves into motion of magnets. Electrical current is produced as a result of the motion between the wire loop and the magnets in accordance with Faraday’s Law. For synergy reasons, arrays of these buoys will be installed in between wind turbines of offshore wind farms.

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Create the Future Design Contest 2011

The 2011 Create the Future Design Contest — sponsored by COMSOL, Inc., PTC, and Tech Briefs Media Group (publishers of NASA Tech Briefs) — recognized innovation in product design in seven categories: Electronics (new this year), Consumer Products, Machinery & Equipment, Medical, Safety & Security, Sustainable Technologies, and Transportation. On the following pages, you’ll meet the Grand Prize Winner, as well as the winners and Honorable Mentions in all seven categories. Congratulations to this year’s winners, and thanks to the more than 900 entrants who submitted their creative design ideas. To view the entries online, visit www.createthefuture2011.com.

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Sizing Up Circuit Protection for LED Strings

By Teddy To, Littelfuse, Inc., Chicago, IL As light-emitting diodes (LEDs) find their way into more outdoor applications, they are at higher risk for electrostatic discharge (ESD) and other electrical transients. High-brightness (HB) LEDs — those with sapphire or silicone carbide (SiC) substrates and in the future aluminum nitride (AlN) and gallium nitride (GaN) substrates — are especially susceptible, and when the first LED in a string fails, the whole string goes dark. Few engineers know all the considerations of specifying circuit protection for LED strings. For example, a recent category of devices, called open LED protectors, are now available, and are not well understood. This article will discuss when to apply them, how to size them, and how to save cost by protecting multiple strings with a single device.

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Taking the Heat: Silicone’s Unique Properties Help Create the Next Generation of LED Lighting

By Kaz Maruyama and Hugo da Silva, Dow Corning Corporation, Midland, MI As global energy demand rises, the significant energy-saving potential of light-emitting diode (LED) lighting remains a top consideration for lighting manufacturers as well as designers, architects, and consultants looking to offer clients more sustainable options. LED lighting uses one-tenth the power of standard incandescent lighting and lasts 25 times longer — it even has the long-term potential to produce more light, with less cost, than compact fluorescent lamps, or CFLs. In fact, LED lighting may soon replace most lighting in homes, offices, public spaces, and in many other applications.

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