Electrospun nanofibers may make for better delivery of healthfood supplements

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A technique known as electrospinning is showing promise as a way of providing health-food ingredients with protection as they pass through the digestive system

Packing food with nutrients, vitamins and other supplements to improve our health sounds like a simple enough idea, but protecting them as they pass through the digestive system isn’t all that easy. While various methods have been employed to encase compounds for more effective delivery, a new technique is showing great promise as a means of keeping them intact. Scientists claim that coating the ingredients in nanofibers created through a process called electrospinning can provide a better safeguard, and could lead to delivery of improved health supplements.

Electrospinning is a technique we have seen in various forms across a number of areas of scientific research. It involves drawing a fluid through an electric field which serves to break the liquid down into microscopic fibers, typically on the micro- or nanoscale. It has been used in the development of dissolving tampons designed to protect against HIV, antibacterial materials and a potential replacement for scar tissue in the heart.

Its promise in the food industry stems from the fact that it can be carried out at room temperature using wet materials, and doesn’t require overly complex chemistry. According to scientists from England’s University of Lincoln, this gives it an advantage over existing methods of encapsulating supplements, which can damage the structure and the bacteria, as it better caters to the sensitivity of the materials.

The upshot of this is a potentially improved way of controlling the release of chemicals in the body, as the supplements can be better protected while being produced and also as they make their way through the digestive system.

Despite this promise, however, it is still early days. Dr Nick Tucker from the School of Engineering at the University of Lincoln and leader of the study, is looking to build partnerships in the industry to learn more about the possibilities. He says work is needed to advance both the electrospun nanofibers themselves and ways of actually integrating them with foodstuffs.

References:http://www.gizmag.com/

Owl-inspired material to reduce wind turbine noise

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Researchers have mimicked the structure of owl wings, which enables them to fly almost silently

Owls are exceptional predators. In addition to their impressive vision and hearing capabilities, they are also able to fly almost silently. This stealthy flight is thanks to the structure of their wings, which researchers have analyzed and mimicked to develop a prototype coating that they claim could significantly reduce the noise generated by wind turbines, computer fans and airplanes.

Using fine detail microscopy, the researchers from the University of Cambridge in the US and Virginia Tech, Lehigh University and Florida Atlantic University in the US examined owl feathers in fine detail, revealing a downy covering that they say resembles a forest canopy when viewed from above. They also saw a flexible comb of evenly-spaced bristles along the wing’s leading edge, while the trailing edge shad a porous and elastic fringe.

“No other bird has this sort of intricate wing structure,” said Professor Nigel Peake of Cambridge’s Department of Applied Mathematics and Theoretical Physics, who led the research. “Much of the noise caused by a wing – whether it’s attached to a bird, a plane or a fan – originates at the trailing edge where the air passing over the wing surface is turbulent. The structure of an owl’s wing serves to reduce noise by smoothing the passage of air as it passes over the wing – scattering the sound so their prey can’t hear them coming.”

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Early attempts to replicate this structure included covering a blade with a wedding veil-like material, which, despite the open structure of the material, reduced the roughness of the underlying surface and cut the surface noise by up to 30 dB.

Realizing that applying a wedding veil to a turbine or airplane isn’t feasible, the team 3D printed a prototype made of plastic and tested it on a full-sized segment of a wind turbine blade. Subjecting the blade to wind tunnel tests, the researchers saw a reduction in noise of 10 dB. Importantly, they reported no appreciable impact on aerodynamics.

The team is now planning to test the coating on a functioning wind turbine, and say that it could allow such turbines to spin faster and generate more electricity than they do currently. This is because wind turbines are currently braked to minimize noise, and letting them spin faster could mean several extra megawatts worth of electricity for an average sized wind farm.

In addition to quieter wind turbines, the researchers say the coating could also find applications on a range of different types of wings and blades – however, the coating still needs to be optimized and incorporating it into airplane wings would be far more complicated than a wind turbine blade.

The team will present the results of their study ay the American Institute of Aeronautics and Astronautics (AIAA) Aeroacoustics Conference in Dallas today.

References:http://www.gizmag.com/

Will Pebble smartwatch be able to compete with Apple and Google?

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Time’s a ticking for Pebble. As the Palo Alto, Calif., smartwatch maker recently started sending the latest model of its phone-connected watches to those who helped fund its development, analysts cast doubt over its ability to compete with the likes of Apple Inc. and Google Inc.

“They’re in a very difficult position right now,” said technologist Stephen Fluin, an expert on mobile phones and wearable devices. “They were the first smartwatch of any kind of scale, they sold more than a million of the original, and they have a lot of favor in the community. Flash forward to now after a year of Android Wear and the recent launch of Apple Watch, and the realities of their project have become more apparent.”
According to analysts, Pebble faces two challenges: a lack of resources compared with its competition and an ongoing struggle to define its audience.
With the former, Pebble was initially funded through crowdfunding platform Kickstarter, where it raised $10.3 million in 2012, making it one of the most successful fundraising campaigns of its kind. But compared with Apple and Google – two tech behemoths with billions of dollars at their disposal – Pebble faces an uphill battle in recruiting the talent, developing the technology and investing in the marketing required to compete at the same level.
Analysts have said smaller smartwatch makers don’t necessarily have to compete head to head with the likes of Apple and Google to be successful and profitable. But to remain relevant, they do need to clearly differentiate themselves – and analysts aren’t convinced Pebble has done that.
Apple and Google have positioned their watches as luxury fashion items as opposed to geeky gadgets, pursuing a more mainstream audience. Pebble has been less clear about who its watch is for.
The Pebble isn’t as refined as Apple or Google’s offerings, said Dan Ward, co-founder of app development firm Detroit Labs, but it’s also not as utilitarian as Garmin’s fitness watches, which makes it a difficult sell in an increasingly crowded marketplace.
“Design is just as important as what’s under the hood,” Ward said. “When Motorola first launched its smartwatch, there was extra buzz around the Moto 360 because it’s gorgeous. Then with Apple, we saw it strategically launch in six designer boutiques around the world, which is the first time anyone has done that.”
The smartwatch race looks increasingly like a David-versus-Goliath situation, with Canalys analyst Daniel Matte saying it’s “basically impossible” to compete with Apple, Google and Samsung, which have “many orders of magnitude more resources.” But Pebble isn’t necessarily out of the race.

Pebble has distinct advantages over the main competition, Matte said.
Being created by neither Apple nor Google means Pebble’s watches are compatible with both iOS and Android, giving users the ability to switch between phones without having to change watches.
The Pebble also has a longer battery life, lasting up to seven days on a single charge compared with the Apple Watch and Android Wear, which last one to two days.
Pebble’s watches also lack the bells and whistles of its competition, which, while perceived as a weakness for some, could be one of its strengths, Matte said.
“It’s a very simple, streamlined product,” he said. “They’ve made something that’s not intrusive to your life.”
The lack of intrusiveness is what appeals to Pebble user Tim Shrimpton, 32, a San Francisco Bay Area resident who backed the original Pebble on Kickstarter.
“The thing I like about it is it’s first and foremost a watch,” Shrimpton said. “The screen is always on. You don’t have to do anything to it. Even having to flick your wrist to get it to turn on (as is it the case with the Apple Watch) seems counterintuitive.”
Some watch wearers find the feature-packed offerings from Google and Samsung off-putting, and have gravitated to Pebble’s minimalist design.
“I don’t want a million features – long battery life and being a watch first appeal to me,” said Pebble user Aaron Crocco, 35, of Selden, N.Y. “Pebble goes with ‘Less Is More,’ and I appreciate that.”
Pebble Chief Executive Eric Migicovsky said Apple’s and Google’s foray into the smartwatch market has helped the company by raising awareness of smartwatches, which has led to consumers seeking out alternatives.
“We’re not going after that luxury jewelry market like Apple is,” Migicovsky said. “The original Pebble was simple. We didn’t say it was a revolutionary device that would change your life. It did a couple of things like text messages, email, calls, the ability to control your music, and did them well, and I think it clicked with our customer base.”
The latest Pebble watch, the Pebble Time, which recently shipped to Pebble’s Kickstarter backers and will soon be available to the wider public, sticks to Pebble’s simplicity ethos by further streamlining the experience. Instead of loading the watch with dozens of individual apps, the Pebble Time lets users organize and view information chronologically in a timeline format.
Pebble also plans to soon offer “smartstraps,” wrist straps with different functions such as GPS and heart rate monitoring that users can swap onto their device.
Like many of Pebble’s other features, the smartstraps are developer friendly, and Pebble has even posted 3-D printing instructions online for building a Pebble smartstrap, encouraging developers to make their own.
Pebble’s openness to developers is another strength. The company stands in stark contrast to Apple, which is notoriously cagey about its products, going so far as to reject apps that mention their compatibility with other platforms such as Pebble.
Fluin believes Pebble can stay in the race if it can clearly carve out a niche for itself. One idea is to position itself as a geek product that appeals to the do-it-yourself crowd who like making or tinkering with gadgets, he said. Or with its lower price (Pebble’s original model starts at $99), it could appeal to children and families, Ward said.
Matte said the company could even pivot to being a software company that focuses on making apps for smartwatches.
Migicovsky has given no indication that Pebble will point itself in either of those directions, but Matte says “it’s a plausible survival strategy.”
Whatever direction it does choose, analysts agree it needs to be more bullish about it.
“With the mobile and wearable landscape shifting as rapidly as it is, you’re either growing and succeeding, or you’re fading and dying,” Fluin said. “With Pebble … I don’t think they’re out yet.”

References:http://phys.org/

With revamped app, news to be at core of Apple

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Apple is diving deeper into the news business with a new application that could make the US tech giant a key industry player.

Apple News, part of the upcoming iOS 9 operating system, aims to be the primary news source for users of the iPhone and iPad—likely at the expense of sources such as Facebook, Google and news apps such as Flipboard.
In a surprising move, Apple has unveiled it will be hiring experienced journalists to manage its news feeds—marking a departure from the algorithmic process used by rivals.
“Apple is eager to have news created by human beings and not algorithms—it fits in with the brand statement Apple has been making,” said Judd Slivka, a professor of mobile journalism at the University of Missouri.
“The expectation is they will put together a smart team that works well broadly across news and specific content areas.”
Although Apple has offered few specifics on its plans, the company’s jobs listing page said it is “looking for passionate, knowledgeable editors to help identify and deliver the best in breaking national, global, and local news.”
The page said the editors should have “great instincts for breaking news, but be equally able to recognize original, compelling stories unlikely to be identified by algorithms.”
This marks a distinction from rivals such as Facebook, which is crafting formulas that aim to deliver articles users want based on their Web habits, demographics and interests.

Fed by robots?

Although Apple is likely to use some algorithms to filter stories, the hiring of experienced journalists is a positive step, said Dan Kennedy, a journalism professor at Northeastern University.
“A lot of people don’t want to be fed news that a robot has decided interests them,” Kennedy told AFP.
“Especially if you don’t have any say how the robot makes that decision. The Facebook algorithm is highly mysterious, and people are starting to resent that.”
Kennedy said it is “encouraging that this is moving journalism to the center of Apple’s universe.”
But he remains cautious about technology companies increasingly becoming gatekeepers for news.
“I’m not crazy about the idea of shifting news to huge corporations like Apple and Facebook that have their own agendas,” he said.

References:http://phys.org/