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Harvard University's robotic insect takes its first controlled flight (video)
There's hardly a shortage of animal inspired robots, but few are as tiny as Harvard's autonomous RoboBee. The robotic insect has been around for a while, but researchers at the Wyss Institute for Biologically Inspired Engineering only recently managed a minor breakthrough: controlled flight. Using new manufacturing and design processes, the team has managed to keep the coin-sized bug aloft by independently manipulating the robot's wings with piezoelectric actuators and a delicate control system. "This is what I have been trying to do for literally the last 12 years," explains Professor Robert J Wood, Charles River Professor of Engineering and Applied Sciences. "Now that we've got this unique platform, there are dozens of tests that we're starting to do, including more aggressive control maneuvers and landing." There's more to be done, however. The tiny machine still requires a tether for power and control, and researchers are still studying nature to suss out how insects cope with flying through wind and the elements. Eventually, the team hopes to outfit the RoboBee with lightweight batteries, an internal control system and a lighter chassis. For now, however, they're just happy to learned to steer. Check out the insect in action after the break.
Smartphone-powered mine detectors readied for field-testing in Cambodia (video)
Red Lotus Technologies is now refining and pitching its PETALS technology for real-world use around the world. Short for Pattern Enhancement Tool for Assisting Landmine Sensing, the system connects acoustic sensors to smartphones, outputting a silhouette of what lies below onto the phone's screen. The company has expanded from an initial research project that paired mine-detecting sensors with the processing clout (and availability of) smartphones. It's now developed some tablet-based training equipment for de-miners and, working alongside the Landmine Relief Fund, aims to field-test the devices in Cambodia before launching them next year.
Harvard makes distortion-free lens from gold and silicon, aims for the perfect image (or signal)
Imaging has been defined by glass lenses for centuries, and even fiber optics haven't entirely escaped the material's clutch. Harvard's School of Engineering and Applied Sciences might have just found a way to buck those old (and not-so-old) traditions. A new 60-nanometer thick silicon lens, layered with legions of gold nanoantennas, can catch and refocus light without the distortion or other artifacts that come with having to use the thick, curved pieces of glass we're used to -- it's so accurate that it nearly challenges the laws of diffraction. The lens isn't trapped to bending one slice of the light spectrum, either. It can range from near-infrared to terahertz ranges, suiting it both to photography and to shuttling data. We don't know what obstacles might be in the way to production, which leads us to think that we won't be finding a gold-and-silicon lens attached to a camera or inside a network connection anytime soon. If the technology holds up under scrutiny, though, it could ultimately spare us from the big, complicated optics we often need to get just the right shot.
New fuel cell keeps on going even once the fuel's dried up
Vanadium oxide seems to be the go-to guy in power storage right now. A new solid-oxide fuel cell -- developed at Harvard's School of Engineering and Applied Sciences -- that can also store energy like a battery, also uses the stuff. In the new cell, by adding a VOx layer it allows the SOFC to both generate and store power. Example applications would be situations where a lightweight power source is required, with the potential to provide reserve juice should the main fuel source run out. The team who developed the cell usually work with platinum-based SOFCs, but they can't store a charge for much more than 15 seconds. By adding the VOx, this proof of concept extended that by 14 times, with the potential for more lifespan with further development. Especially handy if you're always running out of sugar.
Metal detectors and smartphones make beautiful, mine-sniffing music together
Harvard researchers have married a smartphone to a metal detector to create PETALS, a low cost way to improve mine detection in third-world countries. Traditionally, locating land mines has required a carefully trained ear to distinguish deadly explosives from, say, a can. This new system removes some of the guesswork by mapping the beeps on a cell phone screen, creating a silhouette of whatever is beneath the surface. Similar results have been accomplished using acoustic sensors, but so far they've been relegated to research projects and would likely be too expensive for use where they're needed most. Not only should the simplicity of PETALS (which stands for Pattern Enhancement Tool for Assisting Land mine Sensing) make it cheap and easy to deploy but, in tests novice de-miners were able to improve their performance by 80 percent -- that's a least a few less brave humanitarians going "boom" in the field.
SeaAway's offshore Sea Sentinels detect incoming contraband
A Florida-based startup dubbed SeaAway (no relation to Segway, truth be told) is looking to make our ports a good bit safer in the future by implementing an offshore screening process that could detect "chemical, biological, and nuclear traces as ships travel through." The aptly-dubbed Sea Sentinels would be anchored to the seafloor some 14-miles from a port, and will even house up to 15 humans and an array of unmanned aerial vehicles for extreme situations. The platforms would utilize RFID readers to detect what types of cargo passed through its screen, and if sensors flag a suspicious container, the Coast Guard is called into action. Unfortunately, the $100 million it costs to erect each system would have to be subsidized by a passage fee of $20 per container, but tax breaks for shippers are currently be pondered. Nevertheless, a prototype system will see construction later this summer, and if all goes well, finalized versions could be patrolling our seas in the not too distant future.
Volvo Ocean Race takes HD to the high seas
> Yacht racing is a sport normally reserved for the wealthy. However, some people do enjoy following massive boats through life and death weather conditions - sounds better already. Even if that doesn't do it for you, high-def tends to make formerly unwatchable programs such as nature shows and golf, a treat, so maybe HD will do the same for the Volvo Ocean Race. The 2008-09 race sets sail next October and will be produced in HD thanks to special rugged - and we assume waterproof - cameras. No word on which station will carry this event but we have a good feeling that it will be Versus HD.
