quinta-feira, 21 de maio de 2015

Performance-enhancing wearable hydration sensor provides immediate feedback

 

 

Wed, 05/20/2015 - 11:26am

University of Strathclyde

Dr. Stephen Milne demonstrates the device being used in a lab at the University of Strathclyde with Biomedical Engineering research associate Alejandra Aranceta Garza. Courtesy of Graeme Fleming

Dr. Stephen Milne demonstrates the device being used in a lab at the University of Strathclyde with Biomedical Engineering research associate Alejandra Aranceta Garza. Courtesy of Graeme FlemingA wearable device being developed by the University of Strathclyde will provide real-time data analysis of fluid loss during exercise to enhance the performance of fitness enthusiasts and elite athletes. The innovative transdermal sensor is a small device that attaches to the body to analyze electrolytes in sweat, with Bluetooth technology used to send the data back to a smartphone—allowing the user to rehydrate properly and maintain optimum performance.

With heart monitors, pace-calculators and GPS-enabled watches used widely to support a healthy lifestyle, and in elite sporting disciplines, academics at the University believe that hydration monitoring could be the latest addition to the market.

Dr. Stephen Milne, of Strathclyde’s Department of Biomedical Engineering, has been working on the technology and, following successful trials in Qatar and UK, is keen to explore the commercialization of the product.

He said: “Whether you’re a serious athlete or someone who likes to keep fit, it’s important to make sure you get the right amount of fluid before, during and after exercising. The sensor we have developed analyses the sweat produced during activity and provides feedback immediately to a smartphone or computer.

“On an individual level this would allow people to rehydrate during and after exercise. When it comes to team sports, fitness coaches would be able to monitor the data during matches and ensure athletes get what they need to maintain their performance.

“The sensor is small and wearing it on the skin does not cause any discomfort. During exercise the user would barely be aware of it, allowing them to focus on the activity without distraction.”

Demand for personalized information

While there are guidelines in place that help people understand how much they should drink, there is a demand for personalized information that will enhance overall performance and tailored hydration programs. Water regulates body temperature, lubricates joints and helps transport nutrients for energy and health. Inadequate hydration causes the body to under-perform and can lead to fatigue, muscle cramps, dizziness or more serious symptoms.

The sensors have been developed in the Medical Diagnostics Research Group at the University led by Professor Patricia Connolly. She added: “Stephen has been able to take our work in medical sensors and transdermal sensing from the healthcare applications into the field of sport.

The stringent application of medical device standards to our laboratory research means that these sensors will be qualified at the highest level for human use and translatable between sports science and medicine.

This is growing our portfolio of devices for use in home patient monitoring which can be coupled with telehealth systems and smartphones to deliver improved monitoring of patients. This system and our other diagnostics sensors are being supported for commercialization through a University spin out company, Ohmedics Ltd.”

Providing new advantages

The institute of sport is the high performance arm of sportscotland, where teams of experts in disciplines such as physiotherapy, performance nutrition, psychology, skill acquisition, exercise physiology and performance lifestyle work together, and with targeted help from external partners, provide high performance expertise to Scotland's top athletes.

Sportscotland institute of sport's Innovation and Special Projects team and Strathclyde University are currently exploring how high performance sport applications of real time technologies can provide new advantages.

Dr. Malcolm Fairweather, Head of Science and Innovation at sportscotland, said: “In high performance sport, the ability to understand and then optimize an athlete's performance can mean the difference between winning medals or, going home empty handed.

Dr. Marek Anestik, Senior Exercise Physiologist, added: “The ability to add wearable technology to the sophisticated feedback systems that we currently use to monitor and tune the performance of the athletes, could give Scotland a further competitive advantage."

SOURCE: University of Strathclyde

Toward 'green' paper-thin, flexible electronics

 

Wed, 05/20/2015 - 10:15am

A new, environmentally-friendly paper that glows could lead to sustainable, roll-up electronics. Courtesy of American Chemical Society

A new, environmentally-friendly paper that glows could lead to sustainable, roll-up electronics. Courtesy of American Chemical SocietyThe rapid evolution of gadgets has brought us an impressive array of "smart" products from phones to tablets, and now watches and glasses. But they still haven't broken free from their rigid form. Now, scientists are reporting in the journal ACS Applied Materials & Interfaces a new step toward bendable electronics. They have developed the first light-emitting, transparent and flexible paper out of environmentally friendly materials via a simple, suction-filtration method.

Technology experts have long predicted the coming age of flexible electronics, and researchers have been working on multiple fronts to reach that goal. But many of the advances rely on petroleum-based plastics and toxic materials. Yu-Zhong Wang, Fei Song and colleagues wanted to seek a "greener" way forward.

The researchers developed a thin, clear nanocellulose paper made out of wood flour and infused it with biocompatible quantum dots—tiny, semiconducting crystals—made out of zinc and selenium. The paper glowed at room temperature and could be rolled and unrolled without cracking.

The authors acknowledge funding from the Research Fund for the Doctoral Program of Higher Education of China and the National Natural Science Foundation of China.

SOURCE: ACS

 

New printing process makes three-dimensional objects glow

 

Karlsruhe Institute of Technology

Bent and flexible surfaces of various materials, such as paper and plastic, can be provided with a coating to make them glow. Courtesy of S. Walter/Binder Group

Bent and flexible surfaces of various materials, such as paper and plastic, can be provided with a coating to make them glow. Courtesy of S. Walter/Binder GroupConventional electroluminescent (EL) foils can be bent up to a certain degree only and can be applied easily onto flat surfaces. The new process developed by Karlsruhe Institute of Technology (KIT) in cooperation with the company of Franz Binder GmbH & Co. now allows for the direct printing of electroluminescent layers onto three-dimensional components. Such EL components might be used to enhance safety in buildings in case of power failures. Other potential applications are displays and watches or the creative design of rooms. The development project was funded with EUR 125,000 by the Deutsche Bundesstiftung Umwelt (German Foundation for the Environment).

“By means of the innovative production process we developed together with our industry partner, any type of three-dimensional object can be provided with electroluminescent coatings at low costs,” Dr.-Ing. Rainer Kling of the Light Technology Institute of KIT says. Usually, the luminescent material is located between two plastic layers in EL carrier foils. By means of the new printing process, however, the electroluminescent layers are directly printed onto the object without any intermediate carrier. In this way, convex and concave surfaces of various materials, such as paper or plastic, can be made glow.

The different components of the coating, including the electroluminescent and the electrically conductive materials, are applied by a novel pad printing process. The pad printing machine is equipped with an elastic rubber pad that is easily deformable and, hence, excellently suited for the coating of curved surfaces.

“In this way, it is possible to provide surfaces and even spheres with homogeneous coatings at low costs,” says engineer Elodie Chardin, who works on this research project. “Homogeneity of the coating of about one tenth of a millimeter in thickness was one of the challenges of this project,” says the executive engineer of the industry partner, Elisabeth Warsitz. The process requires a few production steps only and, hence, is characterized by a low consumption of resources. By using various luminescent substances, various colors may be applied to the same surface.

The research and development project of KIT in cooperation with the Binder Connector Group, headquartered in the German town of Neckarsulm, took about two years and was funded with EUR 125,000 by the Deutsche Bundesstiftung Umwelt (German Foundation for the Environment). The foundation funds projects for the protection of the environment, with one project partner being a small or medium-sized company. After the successful development of the prototype printing process for electroluminescent layers, the Light Technology Institute of the KIT Department of Electrical Engineering and Information Technology plans further research projects for the optimization of this innovative production process of electroluminescent coatings.

Video on the production of glowing paper: https://www.youtube.com/watch?v=h8xQfvOWBuA

SOURCE: Karlsruhe Institute of Technology

Hindu for Hipsters

 

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Hindu for Hipsters

Posted: 21 May 2015 08:46 AM PDT

“Hindu Tales – Souvenirs of a Future” aims to question the interactions of spirituality and technology. It focuses on Hindu devotees and imagines how they could use new tech in their religious practices. Presented in a tryptic of three “fragments”, the projects consists of traditional props that have been updated with sensory receptors and visual notifications so information on an emotional level can be shared between loved ones in other places. Jump to the vid to see it in action!

Designer: Anne Couvert-Castéra

The bare chair

 

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Posted: 21 May 2015 10:32 AM PDT

We zip-line through life stopping only to click pictures of nature’s abundant beauty for our Instagram. No one pauses to stare at the sunset anymore. Or sit amongst towering trees. The Leano chair is the perfect accessory for people who want to encourage the wanderlust within them. Just simply a wooden frame and fabric, it’s a lovely recliner stripped down to the bare essentials, finally occupying the same amount of space as a closed umbrella, when packed.

It’s so minimal, it puts the Air in Chair!

Designer: Nik Lorbeg

Using a new laser process to custom shape optical fibers

Tue, 05/19/2015 - 11:24am

Fraunhofer-Gesellschaft

Thanks to a new laser process, optical fibers can now be inserted into even smaller vein branches. In this prototype, the tip is inside the fiber probe. © Fraunhofer IZM

Thanks to a new laser process, optical fibers can now be inserted into even smaller vein branches. In this prototype, the tip is inside the fiber probe. © Fraunhofer IZMModern medicine relies on optical fibers to cauterize unhealthy veins in a minimally invasive way. Now, Fraunhofer researchers have developed a laser processing method that facilitates automated series manufacture of these fibers at a much finer quality than ever before. The scientists presented a fiber probe prototype manufactured using the new technique at the measurement fair SENSOR+TEST 2015 in Nuremberg.

Venous disease is fairly widespread in Germany: According to the German Venous League, one in five women and one in six men suffer from varicose veins, thrombosis or other vein problems. Endovenous laser vein therapy is one remedy. For this procedure, a plastic-coated optical fiber 0.5 millimeters in diameter is inserted into the affected blood vessel. Laser light is conducted through the middle of the fiber to the fiber tip. At a temperature of several hundred degrees, the emitted light cauterizes the tissue and causes the veins to collapse. To ensure that the light strikes the side walls of the vein directly, the fiber tip is tapered with a cone-shaped indentation that forms a reflective surface for the laser light. A protective glass cap ensures that no blood deposits directly on the tip could change the optical characteristics of the laser light. The cap also protects the patient from any injury from the fiber tip.

In the LaserDELight project, researchers at the Fraunhofer Institute for Reliability and Microintegration IZM have developed a new, laser-based process for precisely shaping this sort of optical fiber. They use the FiberTurningLaser, which is a laser for glass processing. “The method enables the first automated series production,” explains Dr. Henning Schröder from Fraunhofer IZM. Until now, producing the fibers required complicated mechanical and manual processes that not only took significantly longer, but cost more too. “What’s more, replicating a suitable product is extremely difficult,” adds Schröder. Automation ensures consistent high quality. The project is being funded by the German Federal Ministry of Education and Research BMBF.

Optical fiber tip inside the probe

Using a laser beam, the researchers can shape the optical fiber tip. In a later production step, the protective cap is fused onto the fiber so that no additional fixture is needed. “The new process has demonstrated that it is more practical to fashion a cone-shaped indentation in the fiber than have a tapered shape like the tip of a pencil,” explains Schröder. This offers yet another advantage: the cap on the fiber end is smaller because the tip of the cone is eliminated, making the fiber probe head in general more compact and versatile. Now, it can be inserted into even smaller vein branches.

With help from laser technology, the scientists are trying to achieve even finer dimensions, which can no longer be produced by hand: the goal is optical fibers with a diameter of only 100-200 micrometers. These could open up new applications in the area of optical sensors, for instance as micro optics for visible light communication (VLC) —a technology for optical data transmission. To put it simply, for VLC, the process is the reverse of the endovenous laser procedure. “The fiber tip collects data from the environment and sends it back through the fiber to a detector,” Schröder explains. This detector—a photodiode or CMOS chip—converts the optical information into electrical signals for evaluation. Schröder and his Fraunhofer IZM colleagues will present the fiber probe prototype May 19-21 at the measurement fair SENSOR+TEST in Nuremburg (Hall 12, Booth 537).

SOURCE: Fraunhofer-Gesellschaft

12 Tough Truths that Help You Grow

 

 

Written Marc Chernoff

10 Tough Truths that Help Us Grow

As you look back on your life, you will often realize that many of the times you thought you were being rejected from something good, you were in fact being redirected to something better.  You can’t control everything.  Sometimes you just need to relax and have faith that things will work out.  Let go a little and just let life happen.  Because sometimes the truths you can’t change, end up changing you and helping you grow.

Here are twelve such truths…

  1. Everything is as it should be.  It’s crazy how you always end up where you’re meant to be – how even the most tragic and stressful situations eventually teach you important lessons that you never dreamed you were going to learn.  Remember, oftentimes when things are falling apart, they are actually falling into place.
  2. Not until you are lost in this world can you begin to find your true self.  Realizing you are lost is the first step to living the life you want.  The second step is leaving the life you don’t want.  Making a big life change is pretty scary.  But you know what’s even scarier?  Regret.  Vision without action is a daydream, and action without vision is a nightmare.  Your heart is free, have the courage to follow it.  Read Awaken the Giant Within.
  3. It’s usually the deepest pain which empowers you to grow to your full potential.  It’s the scary, stressful choices that end up being the most worthwhile.  Without pain, there would be no change.  But remember, pain, just like everything in life, is meant to be learned from and then released.
  4. One of the hardest decisions you will ever face in life is choosing whether to walk away or take another step forward.  If you catch yourself in a cycle of trying to change someone, or defending yourself against someone who is trying to change you, walk away.  But if you are pursuing a dream, take another step.  And don’t forget that sometimes this step will involve modifying your dream, or planning a new one – it’s OK to change your mind or have more than one dream.
  5. You have to take care of yourself first.  Before befriending others, you have to be your own friend.  Before correcting others, you have to correct yourself.  Before making others happy, you have to make yourself happy.  It’s not called selfishness, it’s called personal development.  Once you balance yourself, only then can you balance the world around you.  Read Psycho-Cybernetics.
  6. One of the greatest freedoms is truly not caring what everyone else thinks of you.  As long as you are worried about what others think of you, you are owned by them.  Only when you require no approval from outside yourself, can you own yourself.
  7. You may need to be single for awhile before you realize that, although the co-owned belongings from your failed relationships might not have been divided equally, the issues that destroyed the relationships likely were.  For how can you stand confidently alone, or see the same issues arising in your newest relationship, and not realize which broken pieces belong to you?  Owning your issues, and dealing with them, will make you far happier in the long run, than owning anything else in this world.
  8. The only thing you can absolutely control is how you react to things out of your control.  The more you can adapt to the situations in life, the more powerful your highs will be, and the more quickly you’ll be able to bounce back from the lows in your life.  Put most simply: being at peace means being in a state of complete acceptance of all that is, right here, right now.
  9. Some people will lie to you.  Remember, an honest enemy is better than a friend who lies.  Pay less attention to what people say, and more attention to what they do.  Their actions will show you the truth, which will help you measure the true quality of your relationship in the long-term.
  10. If you concentrate on what you don’t have, you will never have enough.  If you are thankful for what you do have, you will end up having even more.  Happiness resides not in possessions, and not in gold; happiness dwells in the soul.  Abundance is not about how much you have, it’s how you feel about what you have.  When you take things for granted, your happiness gets taken away.  Read The Happiness Project.
  11. Yes, you have failed in the past.  But don’t judge yourself by your past, you don’t live there anymore.  Just because you’re not where you want to be today doesn’t mean you won’t be there someday.  You can turn it all around in the blink of an eye by making a simple choice to stand back up – to try again, to love again, to live again, and to dream again.
  12. Everything is going to be alright; maybe not today, but eventually.  There will be times when it seems like everything that could possibly go wrong is going wrong.  And you might feel like you will be stuck in this rut forever, but you won’t.  Sure the sun stops shining sometimes, and you may get a huge thunderstorm or two, but eventually the sun will come out to shine.  Sometimes it’s just a matter of us staying as positive as possible in order to make it to see the sunshine break through the clouds again.

source: www.marcandangel.com

Photo by: Martin Gommel

Photographic tribute to horses

 



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Andrew McGibbon, à qui nous avions déjà consacré un article, est un photographe originaire d’Afrique du Sud. Il a souhaité rendre hommage aux chevaux sauvages, à travers une sublime série de photographies intitulée « All the Wild Horses », magnifiant toutes les courbes des animaux.

How Dean Potter Reinvented Climbing, Jumping, Flying

 

The BASE jumper who died over the weekend said facing his fear of falling to his death is what drove him.

Picture of Dean Potter on Heaven, a steep and difficult roof climb

Dean Potter was the first person to free-solo “Heaven,” a difficult climb 2,000 feet above Yosemite Valley. Half Dome stands in the background. 

Photograph by Mikey Schaeffer, National Geographic Creative

In 2003, with less than a year of BASE jumping experience under his belt, Dean Potter stood at the precipice of the Cave of Swallows, a 1,200-foot-deep hole in the ground near Mexico City. He jumped and free fell about 600 feet before opening his parachute. His rig, however, had gotten wet overnight. When the parachute opened, its lines twisted and the canopy eventually collapsed on top of Potter.

A 10-millimeter rope, rigged to allow jumpers to climb back out of the cave, dangled in space just beside the free-falling Potter.

Now just 200 feet above the cavern floor, Potter managed to grab onto the rope, gripping with all his might.

Jimmy Pouchert, Potter’s partner and BASE-jumping mentor, had jumped moments before Potter and was now standing at the base, watching the whole thing happen above him. “Don’t let go!" Pouchert yelled.

"Don’t let go!”

With a literal death grip on the rope, Potter slowed his fall and survived crashing onto the floor. When Pouchert pulled the canopy off Potter and saw him wide-eyed and alive, he was so happy he kissed Potter on the forehead.

Potter was not totally unhurt; the rope had gouged half-inch ruts in each of his palms, yet they were strangely not bleeding. The intense friction had cauterized his wounds.

Picture of Dean Potter

Nicknamed the “Dark Wizard” for his brooding, intense personality, Potter was a world-class rock climber and one of the most experienced wingsuit BASE jumpers in the world. His contributions to climbing, highlining, and wingsuit flying are the stuff of legend.

 

Stories like this one led much of the global climbing community to believe that if anyone could survive pushing the limits in such risky activities as free-soloing (climbing without a rope), highlining (walking a slackline strung thousands of feet above the ground, sometimes without a safety tether), wingsuit BASE jumping, and speed climbing Yosemite’s biggest walls, it would be Dean Potter, a six-foot-five, 180-pound, larger-than-life character who was widely considered one of the most influential climbers and aerialists of his generation.

Potter’s greatest fear, of falling to his death, came true last weekend in Yosemite, where he died BASE jumping at age 43.

Climbers were quick to paint Potter as an iconoclastic giant.

“Dean Potter was the ‘chosen one,’” said John Long, a longtime climbing writer. “He was perhaps the first person to ever achieve world-class proficiency in three adventure disciplines: climbing, slacklining, and BASE jumping.

"Dean Potter was an event," Long added. "A force of nature.”

 

Accident in Yosemite

Just after 7:30 p.m. on Saturday, Dean Potter and Graham Hunt, 29, died from impact during a wingsuit flight from Taft Point, a promontory 3,000 feet above the valley floor in Yosemite National Park.

Hunt, from El Portal, California, was a charismatic Yosemite denizen, who worked odd jobs in the valley and was a mainstay in the climbing scene there. He had also recently become one of the most active wingsuit BASE jumpers in Yosemite, where all forms of the sport are illegal.

Wingsuit BASE, a sport that’s just over a decade old, is considered to be the most dangerous sport on Earth. For example, simply BASE jumping—the act of parachuting from “fixed” objects such as buildings, antennas, bridges, or cliffs—is estimated to yield one fatality for every 60 participants, according to one 2008 study.

Meanwhile, wingsuit BASE is generally considered far riskier. It also requires the demanding skill of flying a wingsuit—a full-body costume that resembles a flying squirrel, with webbing between the arms and legs—at over 100 miles per hour, often in close proximity to terrain.

Potter often flew with his best friend, his dog Whisper, strapped to his back. This video is a trailer for the film he made about those experiences, called When Dogs Fly.

BASE jumping of any kind is illegal in all national parks for safety reasons, although the law has done little to deter motivated individuals from practicing their sport.

Critics contend that although the federal law is intended to keep people safe, it has had the opposite effect. Because of the law, those who choose to jump within national parks, where most of the biggest cliffs in the United States are located, usually do it at times they are less likely to be seen: during the night or at dusk, when visibility is low.

Low visibility may have been a factor in Potter and Hunt’s accident, but it's not a certainty. Though people have flown wingsuits from Taft Point before, Potter and Hunt’s exact line of descent was new and uncertain—one reason why Potter didn’t bring his dog, Whisper, this time. (Potter had become notorious for flying with his miniature Australian cattle dog strapped into a harness on his back.)

Carving through the air, Potter and Hunt tried to clear a notch in the granite walls but impacted into the cliffs, according to the initial observations from the Yosemite Search and Rescue (YOSAR) team.

When the jumpers didn’t return from their outing, Jen Rapp, Potter’s longtime partner, and Rebecca Haynie, Hunt’s partner since January, approached Mike Gauthier, Yosemite National Park's chief of staff, who was a friend of Potter’s. They told Gauthier that the jumpers had missed their scheduled arrival.

Gauthier helped arrange a team from YOSAR, and a hasty, ultimately unsuccessful search on foot was done Saturday evening.

On Sunday morning, a California state helicopter quickly located two subjects that matched Potter and Hunt’s descriptions. By noon, two rangers were lowered out of the helicopter onto the site. They confirmed Potter and Hunt’s deaths, and performed the recovery.

The climbing and BASE jumping worlds were left reeling, if unsurprised.

“Dean was pushing the limits. He was living right on the edge,” says Cedar Wright, a professional climber from Boulder, Colorado. “You don’t meet many old wingsuit BASE jumpers. It seems like the better you get, the more dangerous it gets.”

Picture of Dean Potter

In 2009 Potter set a wingsuit BASE jumping world record for duration. Jumping from the infamous north face of the Eiger in Switzerland, he stayed in flight for 2 minutes and 50 seconds, a feat that made him a National Geographic Adventurer of the Year. 

Photograph by Corey Rich, Aurora Photos

 

An Outspoken Critic

Tom Aiello, the owner of the world’s only formal BASE jumping school, Idaho's Snake River BASE Academy, says that BASE jumping has always been subversive.

“In the U.S., BASE jumping comes from illegal roots,” Aiello says. “Most of my peers—and there is an ever diminishing number of them—started out BASE jumping at night off of illegal objects. We’re talking about antennas and buildings and sneaking into national parks.”

Potter positioned himself as perhaps the most outspoken critic of national park laws that prohibited his kind of extreme athletics.

“It’s about basic freedom,” Potter said in an interview with me on May 12, days before his death. “Being allowed to travel in nature in a way that doesn’t harm the environment shouldn’t be illegal.”

That tension, between exercising his personal freedom and running up against the law, was perhaps the defining theme of Potter’s life.

Potter began climbing in 1988 when, as a 16-year-old military brat, he trespassed onto Joe English Hill, a 1,273-foot mountain controlled by a local Army base near his home in New Boston, New Hampshire. Lacking ropes and gear, Potter’s first experiences involved simply climbing barefoot, free-solo (no ropes or gear for safety), and alone.

He went on to complete three semesters of college at the University of New Hampshire before dropping out and becoming a quintessential itinerant climbing bum in the 1990s.

Potter lived on Saltine crackers and slept in caves, avoiding rangers who tried to kick him out of Yosemite National Park for overstaying the two-week camping limit.

In 2011 Potter walked a highline over California's  iconic Yosemite Falls, contending with  water spray and high wind, at a height of 1,400 feet.

He walked everywhere barefoot and climbed that way, too. He often spoke in mystical overtones, referring to his sports of climbing, highlining, and wingsuit flying as “arts.” Most of all, he was known for his brooding moods, garnering him the nicknames of “Mean Dean” and, ultimately, the “Dark Wizard.”

“Dean could be the most amazing person to hang out with,” says Wright. “Hilarious, awesome, and really insightful one minute, and then the next minute he could turn into this kind of dark soul.”

In 2006 Potter was the subject of a scandal when he free-soloed Delicate Arch in Arches National Park. Though climbing on Delicate Arch was not technically illegal, Potter drew criticism from park rangers, Utah government officials, and even some in the core climbing community for his flagrant media exposure and potential damage done to the soft rock on the arch. Ultimately, Potter’s main sponsor, Patagonia, dropped both him and his then-wife, Steph Davis, over the incident.

Picture of Den Potter and dog Whisper

Potter had a mantra: “Never leave the dog behind!” Potter’s best friend Whisper joined him on many adventures, from climbing El Capitan to wingsuit BASE jumping, a stunt that was featured in the film When Dogs Fly.

Photograph by Jimmy Chin, National Geographic

 

Mastering the Dark Arts

Potter said that falling to his death was his greatest fear. But facing that fear of falling was also what initially drove him to start free-solo climbing, and later, wingsuit BASE jumping.

By the mid 2000s, Potter’s success as a professional climber had brought him a home on 30 acres in Yosemite West, just outside of his beloved Yosemite Valley where, over the past 22 years, he had pushed the limits of what was considered possible in climbing famous, huge granite walls.

Potter has intermittently held numerous speed-climbing records in Yosemite. He'd recently pioneered a new “running” record, reaching the summit of the iconic Half Dome via the technical Snake Dike rock climb in 1 hour and 19 minutes.

For the past 13 years, Potter had combined climbing, running, and flying into hybrid “sports,” though it is hard to label some of these endeavors as sports because they are so technical, so dangerous, and so difficult that oftentimes Potter was the only person even practicing them. For example, Potter invented “free BASE,” which is free-soloing (climbing without a rope) tall walls (at least 1,000 feet in height) with a parachute for safety in the event of a fall.

In 2008 Potter achieved the first free BASE of the infamous north face of the Eiger in Switzerland, one of the “three great north faces of the Alps,” via a difficult route named Deep Blue Sea. He’d routinely climb up the wall, working up courage to put fear aside, not to mention the strength to climb such a demanding route with a parachute on his back. To survive a fall, he would need to have the catlike agility to turn around the right way, steady his body position, and deploy his parachute before crashing into the slabs below.

Picture of Dean Potter climbing in Yosemite

Potter pioneered a style of climbing called “speed solo,” in which he climbed alone, mostly free-solo (without a rope), but using rope and gear for the toughest sections. The hybrid style gave him a modicum of safety and a huge increase in speed. This visionary approach to climbing big walls—such as El Capitan, shown here—allowed Potter to achieve several record times.

Photograph by Jimmy Chin

“This concept of turning dying into flying is a metaphor for my basic life principle,” Potter wrote of his free BASE solo of the Eiger.

Potter continued to push the limits of wingsuit BASE jumping too. In 2009 Potter set a record in the wingsuit BASE jumping world for duration. Jumping from the Eiger’s north face, he stayed in flight for 2 minutes and 50 seconds, a feat that made him a National Geographic Adventurer of the Year.

In the weeks leading up to his death, Potter had been testing out a new paragliding rig that weighed only three pounds, including the harness, and could fit into a fanny pack. He said he was looking forward to putting this technology, as well as his highly technical skill set, to use in other areas around the world, where deploying a parachute isn’t illegal.

“To be able to practice my three arts, and experience the simplicity and beauty of moving quickly in the mountains and on big walls," he said, referring to climbing, flying, and highlining: “What could be better than that?”

Pictures of Potter's Extreme Moments

On The Nose

Dean Potter (right) and Timmy O'Neil pose before attempting to summit the Nose on Yosemite's El Capitan in 2001. In 2010, Potter and another climber set a speed-climbing record on the Nose, completing the 3,000-foot ascent in just over 2.5 hours.

Photograph by Tom Frost, Aurora Photos

No Ropes

Potter clambers up El Capitan in July 2011 without any ropes, a sport known as free-solo climbing. Potter said that a fear of death from falling was his greatest fear—and his biggest motivator.

Photograph by Mikey Schaefer

BASE Jump

Dean Potter leaps from a platform built into Mount Bute in British Columbia, Canada wearing a wingsuit—specialized gear with "wings" between the underarms and legs. Wingsuit BASE jumping is considered to be the world's most dangerous sport.

Photograph by Dean Potter

The Dark Wizard

Nicknamed the "Dark Wizard" for his intense personality, Potter poses with Yosemite's Half Dome in the background in 2010. Potter would eventually claim the speed record for run-climbing Half Dome in 1 hour and 19 minutes.

Photograph by Jimmy Chin, National Geographic

High Line

Balancing precariously above Yosemite Falls in 2010, Potter contends with water spray and high winds at a height of 1,400 feet (426 meters).

Photograph by Jimmy Chin, National Geographic

New record efficiency for black silicon solar cells

 

 

Solar cells built with black silicon are much more light-absorbent, and can capture incident photons from very low angles

Solar cells built with black silicon are much more light-absorbent, and can capture incident photons from very low angles (Credit: Aalto University)

Researchers at the University of Aalto, Finland have broken the efficiency record for black silicon solar cells a type of cell that can gather sunlight even from tight angles by almost four percent.

Black silicon can be manufactured simply by adding a dense network of nanoscale needles on top of a standard piece of silicon. Modifying the material in this way makes it a lot less reflective, allowing solar cells that use it to trap light even when it's coming from very low angles. This could be a good way to increase the yield of solar cells throughout the day, particularly in countries at higher latitudes. On top of this, black silicon cells could also be cheaper, as they don't need the antireflection coatings used by many other types of solar cells.

The main issue that has stifled the progress of black silicon cells is something known as carrier recombination. When a photon hits a silicon atom inside a solar cell, the excess energy frees up an electron that is later used to generate electricity. Occasionally, though, the electron simply recombines with a silicon atom, effectively wasting the energy provided by the photon. Recombination is proportional to the surface area of the silicon, and the needles on the surface of dark silicon raise surface area so much that about half of the freed electrons are "lost" in this way.

Now, a team of researchers led by assistant professor Hele Savin has managed to get around the issue, and in so doing, it has increased the record efficiency of black silicon cells by almost four percentage points, up to 22.1 percent. Their real-life performance is however better than that as the researchers were also able to show that, thanks to their ability to accept sunlight from lower angles, black silicon cells can gather three percent more energy than a cell with the same nominal efficiency over the course of the entire day.

Savin and colleagues put recombination in check by applying a thin aluminum film, acting like a chemical and electronic shield, on top of the nanostructures. They also integrated all the metal contacts on the back side of the cell, for added absorption.

These two changes meant that only four percent of the freed up electrons recombined, as opposed to the previous 50 percent. The new cell design is however likely not pushing this technology to its limit just yet, since it made use of p-type silicon rather than the more durable n-type silicon. According to the scientists, a better choice of materials or a better cell structure would push efficiencies even further.

The near-term goal for the researchers is to apply their technology to other cell structures, thin and multi-crystalline cells in particular – but also, Savin tells us, other devices like screens and photodetectors.

The results appear in this week's edition of the journal Nature Technology.

Source: Aalto University

Centinel Wheel makes bikes into e-bikes

 

 

The Centinel Wheel replaces an existing bike's rear wheel

The Centinel Wheel replaces an existing bike's rear wheel (Credit: Hycore)

If you'd like the ease of an electric bicycle but don't want to give up your perfectly good "manual" bike, there is something you can do – you can replace your bike's existing rear wheel with the electrically-powered Copenhagen Wheel or FlyKly, or replace its front wheel with the Omni Wheel. Those three products may soon have to make room for another competitor, however, as the Centinel Wheel enters the marketplace.

Like the Copenhagen Wheel and the FlyKly, the Centinel is swapped with a regular bike's back wheel – plans call for it to first be made in a 26-inch wheel size, with other sizes to follow.

The Centinel contains a microcontroller, two 180-watt motors (for a total of 360 watts) that can be removed for upgrading, and a 24-volt 13-amp lithium-ion battery that can also be taken out for charging.

It also has a Bluetooth 4.0 module, allowing it to communicate with an app on the user's iOS or Android smartphone. That app allows them to select the amount of electrical assistance provided and view the battery charge level, among other functions. Additionally, the Centinel is able to monitor the user's cadence, automatically providing more assistance as needed in order to maintain that pace.

According to Hycore, the Seoul-based designer of the product, the Centinel has an electronically-limited top speed of 16 mph (26 km/h) and a range of approximately 30 miles (48 km). By comparison, both the Copenhagen Wheel and the FlyKly can go up to 20 mph and have a range of about 30 miles.

If you're interested in getting one, the Centinel Wheel is currently the subject of a Kickstarter campaign. Pledges start at US$899, with shipping scheduled for next April if all goes according to plans. That price is actually less than that of the $949 Copenhagen Wheel or the $1,099 FlyKly.

 

Sources: Hycore, Kickstarter

LG Display peels back magnetic wallpaper OLED TV panel

 

 

A model peels LG Display's

A model peels LG Display's "wallpaper OLED" panel from its magnetic mount (Credit: LG Display Co.)

 

LCD panels have enabled widescreen TVs thin and light enough to be hung on a wall like a picture – assuming you hang your pictures with a VESA-compliant wall mount. But LG Display has gone one step further, showing an OLED panel that can be stuck to a wall like wallpaper – assuming you hang your wallpaper with magnets.

LG Display showcased its 55-inch "wallpaper OLED panel" – or possibly the world's biggest fridge magnet – this week at a media event in Seoul. In comparison to LG's current flagship 55-inch OLED TV that is 4.3 mm thick, the new panel is just 0.97 mm thick and weighs 1.9 kg (4.1 lb). It is also flexible, making it easy to peel off a magnetic mat affixed to the wall.

Competitors such as Samsung and Sony seem to have largely dropped out of the OLED race and pinned their hopes on the next evolution of LCD technology, quantum dot. But the head of LG Display's OLED division, Yeo Sang-deog, promised his company would be scaling up OLED production later this year to meet client demand. Although LG Display is an independent company and supplies panels to a various companies, including Dell, ASUS and Apple, its biggest customer is affiliate LG Electronics.

Earlier this year, LG Display released OLED panels in 55-, 65- and 77-inch sizes, with LG showing TVs utilizing the panels at CES. Now the company plans to go even bigger, with Yeo promising a 99-inch unit within the year. But he says it won't be ignoring the small- to mid-sized displays, with plans to continue improvements to its plastic OLED technology for use in transparent, rollable and flexible displays for wearable devices and vehicle dashboards.

Yeo added that improvements in yields for OLED panels would be a key factor in helping it achieve sales targets of 600,000 OLED panels this year and 1.5 million units in 2016.

"It has taken a year and half for us to raise the yield to this level (for OLEDs), while it'd taken nearly 10 years to achieve the yield for LCDs," Yeo said.

There's no telling when a wallpaper OLED might be headed to the walls of consumers' houses, but the idea of a TV that sticks to a wall like a fridge magnet is sure to be "attractive" to many.

Source: LG Display, Yonhap