Saturday, October 31, 2009

Rethinking the Cell Phone


If you could reduce a mobile phone to its essence, it would look like the Modu. This tiny phone, which is slightly larger than a domino, is capable of sending and receiving calls and text messages. It can store contacts and MP3s with up to 16 gigabytes of storage capacity, and it has a small but usable screen and a sparse keypad that lacks numbers. Launched this week at the Mobile World Congress in Barcelona, the Modu can be used as a stand-alone phone. But more important, it can also be slipped into a variety of "jackets," such as in-car MP3 players, Global Positioning Systems, and larger cell phones, that expand the Modu's functions and change its look.

Modu Mobile, the Israeli startup that launched the phone, is hoping to change the way that consumers think about their handhelds, explains Itay Sherman, the company's chief technology officer. Today, people generally have one phone that they use all the time, and they use it for a year or two because it's too expensive to buy a new model more frequently. But Sherman says that the idea of one phone for all occasions doesn't mesh with people's lifestyle. Sometimes you want to walk around with the smallest possible phone, he says; other times you want a good messaging device with a large keyboard, or a media player with a large screen. "Instead of buying a completely new phone, the jacket enables you to switch."

In making the Modu, Sherman says, there were a number of technical considerations. While semiconductor technology is at the point where chips are small enough to easily fit into the mini mobile, his team also had to shrink the phone's other features, such as the screen, keypad, and battery. The display, for instance, needed to be specially designed: it uses organic light-emitting diodes and is a mere one millimeter thick. (See "Super-Vivid, Super-Efficient Displays.") Knowing that it would be impractical to put a full, numbered keypad on the Modu, Sherman says, his team designed a simpler keypad that lets people access menus on the screen, similar to those of MP3 players. The lithium-ion polymer battery, which uses the same basic technology as traditional phone batteries, was customized to be thin and long, while still providing about 3 hours of talk time and 100 hours of standby.

Once a user plugs the Modu into a jacket, however, the features improve. "The jacket may also have a battery," says Sherman, and the combined device shares the load between the two batteries. "It extends the talk time and standby time."

One of the main innovations, says Sherman, is that the software that runs the Modu automatically reconfigures when it is put in another device. A resource file defines the way the Modu and jacket will work together. "Every jacket you plug into, you'll get a completely different experience, yet it keeps the basic functionality in all cases so that it's familiar to the user," he says.

Beyond cell-phone jackets, Modu Mobile will offer other consumer-electronics devices in which the phone module can be inserted, improving the basic functions of the device. For instance, a camera with the Modu could wirelessly send pictures to other phones, and a car entertainment system designed for the Modu could let a user access his MP3s while enabling hands-free calling.

This isn't the first time that consumer-electronics companies have tried to build modular phones, says Avi Greengart, the research director for mobile devices at Current Analysis, a market research firm. He points to IXI Mobile, the maker of the Ogo mobile messenger. "It had the notion of connecting multiple devices together via Bluetooth," he explains. A user would have a basic storage module and then connect to a large display or media player. However, the technology didn't catch on because few people think to buy a shell of a media player and then the other pieces to make it work, Greengart says.

Microsoft's Many Multitouch Mice


Last week Apple released the Magic Mouse, a new computer mouse with a "multitouch" interface that responds to movement of fingertips across its surface in addition to conventional click-and-drag actions. Archrival Microsoft isn't ready to launch a competing product just yet, but the company does have plans for its own multitouch mice. Earlier this month, researchers presented five prototypes at the User Interface Software and Technology in Victoria, British Columbia, and their work won the symposium's best paper award.

With a multitouch mouse, a user can, for example, browse through a virtual stack of digital photos by flicking a finger across the mouse's surface, rotate an image by stroking the mouse, or zoom in on a picture by drawing an arrowhead with a fingertip.

"If the [traditional] mouse pointer is your virtual fingertip, we're giving you a virtual hand," says Dan Rosenfeld, a researcher with Microsoft's Applied Sciences Group in Redmond, WA. There are multitouch surfaces for tabletops, computer monitors, and cellphone screens, he says, but aside from Apple's new device, "there's really nothing addressing the kind of tasks that lots of people do all day long, sitting in front of a desk at a computer."

The first mouse outlined in the Microsoft research paper consists of a piece of clear acrylic lit with infrared light along its edge, where it attaches to a palm rest. Fingertips on the acrylic scatter the light, and an infrared camera captures the light patterns to track the movement of the fingers. The technique, known as frustrated total internal reflection (FTIR), has been used for other multitouch systems before, but this is the first design that also integrates the classic features of a mouse such as an optical sensor underneath and clickable buttons.

Another prototype, the dome-shaped Orb Mouse, also uses an infrared camera and light, but it reflects the light out of its center to make its entire hemisphere touch-sensitive. The dome also acts as a giant click button.

SideMouse, in contrast, positions the palm of the user's hand on top and projects infrared light out of its side to track the user's fingers as they move along the table next to the mouse.

The Cap Mouse abandons the infrared scheme altogether, instead tracking finger movements with a grid of capacitive sensors on its surface. Unlike the mice that rely on infrared technology, Cap Mouse isn't affected by ambient lighting, consumes less power, and offers a less detailed account of finger movements.

Software That Fixes Itself


Martin Rinard, a professor of computer science at MIT, is unabashed about the ultimate goal of his group's research: "delivering an immortal, invulnerable program." In work presented this month at the ACM Symposium on Operating Systems Principles in Big Sky, MT, a group of MIT researchers, led by Rinard and Michael Ernst, who is now an associate professor at the University of Washington, developed software that can find and fix certain types of software bugs within a matter of minutes.

When a potentially harmful vulnerability is discovered in a piece of software, it takes nearly a month on average for human engineers to come up with a fix and to push the fix out to affected systems, according to a report issued by security company Symantec in 2006. The researchers, who collaborated with a startup called Determina on the work, hope that the new software, called ClearView, will speed this process up, making software significantly more resilient against failure or attack.

ClearView works without assistance from humans and without access to a program's underlying source code (an often proprietary set of instructions that defines how a piece of software will behave). Instead, the system monitors the behavior of a binary: the form the program takes in order to execute instructions on a computer's hardware.

By observing a program's normal behavior and assigning a set of rules, ClearView detects certain types of errors, particularly those caused when an attacker injects malicious input into a program. When something goes wrong, ClearView detects the anomaly and identifies the rules that have been violated. It then comes up with several potential patches designed to force the software to follow the violated rules. (The patches are applied directly to the binary, bypassing the source code.) ClearView analyzes these possibilities to decide which are most likely to work, then installs the top candidates and tests their effectiveness. If additional rules are violated, or if a patch causes the system to crash, ClearView rejects it and tries another.


ClearView is particularly effective when installed on a group of machines running the same software. In that case, what ClearView learns from errors on one machine is used to fix all the others. Because it doesn't require access to source code, Rinard says that ClearView could be used to fix programs without requiring the cooperation of the company that made the software, or to repair programs that are no longer being maintained. He hopes the system could extend the life of older versions of software, created by companies that have gone out of business, in addition to protecting current software.

To test the system, the researchers installed ClearView on a group of computers running Firefox and hired an independent team to attack the Web browser. The hostile team used 10 different attack methods, each of which involved injecting some malicious code into Firefox. ClearView successfully blocked all of the would-be attacks by detecting misbehavior and terminating the application before the attack could have its intended effect. The very first time ClearView encounters an exploit it closes the program and begins analyzing the binary, searching for a patch that could have stopped the error.

Friday, October 30, 2009

Revitalizing Donor Lungs


A new gene therapy treatment designed to reduce inflammation can prevent damage in donor lungs, potentially making more organs available for transplant. According to the Organ Procurement and Transplantation Network, about 1,800 people in the United States are currently waiting for a lung transplant.

Researchers from the McEwen Centre for Regenerative Medicine in Toronto had previously developed a novel system to improve the health of donor lungs, which mimics normal physiological conditions by continuously pumping oxygen, proteins and nutrients into the injured organs. In the new study, published this week in the journal Science Translational Medicine, researchers infused the lungs with the gene for a molecule called Il-10, which reduces inflammation. Both pig and human lungs given the treatment functioned better than untreated organs, with better blood flow and less swelling, an affect that lasted up to 30 days. And the treated lungs functioned better when transplanted into pigs.

According to an article in the Los Angeles Times,

They then took human lungs that were considered too damaged for transplantation and subjected them to the same procedure. The treatment significantly improved blood flow through the lungs and improved their ability to take in fresh oxygen and remove carbon dioxide. The higher levels of IL-10 persisted in the lungs for 30 days, suggesting that the procedure could also reduce rejection of the organs. The lungs were not implanted in humans.

The procedure "not only may result in improved preservation of lungs [before transplantation] but also may repair lungs otherwise not suitable for transplantation," Dr. David S. Wilkes of the Indiana University School of Medicine wrote in an editorial accompanying the report.

But several questions remain, he said. Implanting lungs from a human donor might present more problems. And the use of adenoviruses has caused complications in some gene-therapy experiments when the virus inserted the added gene at an inappropriate location.

Keshavjee said the team hopes to begin human trials in a year or so.

Dead not forgotten on Facebook











SAN FRANCISCO: Facebook lets people leave their marks online after they have shuffled off their mortal coils, with profiles of the dead remaining as tributes in the global social networking community.

‘When someone leaves us, they don’t leave our memories or our social network,’ Facebook director of security Max Kelly said in a blog post Monday.

‘To reflect that reality, we created the idea of ‘memorialized’ profiles as a place where people can save and share their memories of those who’ve passed.’

Profiles of dead people do not turn up in friend recommendations or general searches at Facebook, according to Kelly. Privacy settings on memorialized accounts only let confirmed friends or family members see them.

No one is allowed to log into memorialized accounts, preventing alteration of profile content, but friends can still post remembrance messages that are displayed on ‘walls’ for visitors to see.

Contact information and status updates are removed from memorialized profile pages.

Only friends or relatives of deceased Facebook members can request profiles be memorialized, and information submitted must include a copy of an obituary, news article or other proof of death.

‘If you have a friend or a family member whose profile should be memorialized, please contact us, so their memory can properly live on among their friends on Facebook,’ Kelly said.

The service is not new to Facebook, but it reminded members of it this week.

Wednesday, October 28, 2009

10 Amazing YouTube Videos

It is a special occasion when you capture that one in a million shot, when you witness an amazing spectacle and have your video camera at your side. Natural disasters and unexplained phenomena happen every day. Still, there are few videos of these events as they occur. With the expansion of personal video cameras in the last 20 years, sometimes we get a glimpse at something unusual and amazing. YouTube makes it possible for us to view these videos from all around the world. Here is a collection of 10 amazing videos you can find on YouTube. I am always on the lookout for new finds, so be sure to let me know of any other unbelievable youtube videos that are not mentioned here.

10. Ride That Mega-Tsunami

Mike Parsons is one of the most amazing athletes on the planet. He is a big wave surfer and one of the best at his profession. He was made famous by this video which shows him riding a 65 ft. wave off the beaches of Jaws, Hawaii. The footage was filmed from a helicopter and is 100% real. At the time, it was the biggest wave ever surfed, but Parson’s broke his own record in 2008 at Cortes Bank. He has numerous extreme surfing videos, including Billabong Odyssey, which I recommend.


9. Mythbusters Play with Helium and Sulfur Hexafluoride

This is an amazing and simple scientific experiment featured on the show Mythbusters. Everyone knows what happens when someone inhales helium, their voice gets high and squeaky for a couple of seconds. Adam Savage decides to see what happens when he inhales sulfur hexafluoride, which is much denser then air and has the exact opposite effect as helium. Basically, it will make your voice sound deeper and like you are from the dark side. This video demonstration is hilarious as Adam inhales both helium and sulfur hexafluoride.


8. Ethiopian Airlines Flight 961 Crashes

Ethiopian Flight 961 was hijacked on November 23, 1996 by three Ethiopians who were seeking political asylum. Flashing a fake bomb, the attackers demanded that the flight be re-routed to Australia. The pilot explained that there was not enough fuel on board to make that trip, but the hijackers ignored him. Secretly, the pilot headed towards the Comoro Islands, which are halfway between Madagascar and the African mainland. The plane was nearly out of fuel as it approached the Island group. The pilot was forced to ditch in the shallow waters of the Indian Ocean of the Coast of Grand Comoro Island. As the plane landed, a coral reef hit the engine causing the plane to spin to the left and break apart. Tragically, 125 of the 175 passengers and crew aboard were killed in the accident. A tourist recorded this video later proclaiming that she thought the 767 aircraft was part of a surprise air show. It might be the most clear and devastating plane crash video ever taken.



7. Route 168 Landslide in Japan

A landslide is a geological phenomenon that often plagues the country of Japan. Around 75% of land in Japan is forested, mountainous, and unsuitable for agriculture or residential use. Because of these steep elevations, levels of rainfall, earthquakes, and soft ground, Japan is extremely landslide prone. In Japan, many busy roads are built across mountain slopes. Route 168 is a national highway connecting Shingu, Wakayama to Hirakata, Osaka. Landslides like this often cause much heartache to the area. Highways routinely become blocked and many people don’t have an alternative way to get home. This has caused city officials to adopt many landslide prevention and safety programs. In the video you can see the slide abolish everything including the protective fence surrounding the highway.



6. The Ghost Car

One night the Garden City police were in pursuit of a car. The vehicle was driving sporadically and would not pull over to the side of the road. It seemed to be speeding up and slowing down at abnormally rapid levels. It was all captured by the police officers’ dash camera. As the pursuit ensues, the car enters a fenced-in parking lot and the chase seems to be coming to an end. Suddenly, the car turns directly toward the fence and seems to mysteriously drive right through it. All that you can see is a faint view of the car’s tail lights as it barrels into the fence. There are no signs of a crash on the fence or behind it. The cop cruiser comes to a stop and the car and its occupants are never located. Supernatural or not, you decide.



5. Christian the Lion

In 1969, John Rendall and Anthony Bourke purchased a baby lion from Harrods department store of London. They raised Christian for a year and then ultimately had him released back into the wild. After hearing that he had been successfully reintroduced to his natural habitat they took an expedition to Kenya to visit their lion. It was one year later and the men were accompanied by a documentary film crew. Many conservationists warned Rendall and Bourke that Christian would not remember them. The reunion that ensues is touching to the heart. Christian cautiously approaches, but then runs and jumps into the men’s arms. The documentary also shows two female lions and one foster cub that are friendly with the crew. With many tragedies on this list I figured a light-hearted story of friendship would fit nicely.



4. Challenger Explosion

It was the United States’ 25th official space shuttle launch and the Challenger’s tenth trip into space. It was a special mission and included American teacher Christa McAuliffe, who won a contest to participate in the NASA Teacher in Space Project. The Challenger mission was delayed many times and finally was set to launch on January 28, 1986. Sadly, 73 seconds into the launch the Challenger broke apart and exploded leading to the death of all seven crew members. It was later determined that the accident occurred when a faulty O-ring seal on its right rocket booster failed. The failure allowed a plume of flame to explode out of the rocket booster and damage the external fuel tank and attachment struts. By that time it was too late to save the shuttle. It was one of the most costly and tragic accidents in United States history and was all caught live on television.



3. Paul Potts sings Nessun Dorma

Paul is a British tenor who won the first series of Britain’s Got Talent. Before the competition he was a mobile phone salesman. This video shows his rendition of “Nessun Dorma,” which immediately made him the front-runner on the show. You can see Simon Cowell laughing at him before he begins and then enter into a state of shock as Potts performs. This is one of the most popular videos in YouTube history. Paul was featured on the Oprah Winfrey Show whose topic was YouTube videos. After winning the competition Potts went on a massive world tour, consisting of 97 concerts in 85 cities spanning 23 countries. Paul Potts first album One Chance was a multi-platinum masterpiece. It reached the #1 spot in 13 different countries around the world, proof positive that everyone can enjoy some good opera music. A similar scenario took place with Susan Boyle.


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2. 2004 Indian Ocean Tsunami Hits

On December 26, 2004 a 9.3 earthquake struck off the west coast of Sumatra, Indonesia. What followed was a devastating tsunami that traveled all along most coasts of the Indian Ocean. It was one of the most deadly natural disasters in recorded history and more than 225,000 people were killed in eleven different countries. The hardest hit areas were Indonesia, Sri Lanka, India, and Thailand. There were many sad and terrifying videos taken of the tsunami as it struck the mainland. Beach resorts and tourist attractions were hit first in many instances. This clip shows a couple of different videos of the tsunami as it reached land. It truly gives you a sense of the deadly power of this disaster. Watch as the ocean completely engulfs a large pool at a beach-front hotel.



1. The Battle at Kruger

You know that a YouTube video has become famous when it has its own Wikipedia page. That is the case for the Battle at Kruger. The video was shot in September of 2004 at a watering hole in Kruger National Park, located in South Africa. It shows an epic real life battle between a pride of lions, a herd of Cape buffalo, and one or two crocodiles. It all begins when the lions attack one of the baby buffalo and tackle it into the river. While the lions are trying to finish off their meal, a crocodile grabs onto the buffalo and tries to take it. The lions prevail and pull the buffalo from the water only to then be attacked by the herd. It is truly an amazing clip that shows an animal’s true struggle for survival.


Bad Driving May Have Genetic Basis, Study Finds


People with a particular gene variant performed more than 20 percent worse on a driving test than people without it -- and a follow-up test a few days later yielded similar results. About 30 percent of Americans have the variant.

"These people make more errors from the get-go, and they forget more of what they learned after time away," said Dr. Steven Cramer, neurology associate professor and senior author of the study published recently in the journal Cerebral Cortex.

This gene variant limits the availability of a protein called brain-derived neurotrophic factor during activity. BDNF keeps memory strong by supporting communication among brain cells and keeping them functioning optimally. When a person is engaged in a particular task, BDNF is secreted in the brain area connected with that activity to help the body respond.

Previous studies have shown that in people with the variant, a smaller portion of the brain is stimulated when doing a task than in those with a normal BDNF gene. People with the variant also don't recover as well after a stroke. Given these differences, the UCI scientists wondered: Could the variant affect an activity such as driving?

"We wanted to study motor behavior, something more complex than finger-tapping," said Stephanie McHughen, graduate student and lead author of the study. "Driving seemed like a good choice because it has a learning curve and it's something most people know how to do."

The driving test was taken by 29 people -- 22 without the gene variant and seven with it. They were asked to drive 15 laps on a simulator that required them to learn the nuances of a track programmed to have difficult curves and turns. Researchers recorded how well they stayed on the course over time. Four days later, the test was repeated.

Results showed that people with the variant did worse on both tests than the other participants, and they remembered less the second time. "Behavior derives from dozens and dozens of neurophysiologic events, so it's somewhat surprising this exercise bore fruit," Cramer said.

The gene variant isn't always bad, though. Studies have found that people with it maintain their usual mental sharpness longer than those without it when neurodegenerative diseases such as Parkinson's, Huntington's and multiple sclerosis are present.

"It's as if nature is trying to determine the best approach," Cramer said. "If you want to learn a new skill or have had a stroke and need to regenerate brain cells, there's evidence that having the variant is not good. But if you've got a disease that affects cognitive function, there's evidence it can act in your favor. The variant brings a different balance between flexibility and stability."

A test to determine whether someone has the gene variant is not commercially available.

"I'd be curious to know the genetics of people who get into car crashes," Cramer said. "I wonder if the accident rate is higher for drivers with the variant."

In addition to Cramer and McHughen, Paul Rodriguez, Laura Marchal-Crespo and Vincent Procaccio of UCI worked on the study, along with researchers from the University of Florida. The National Institutes of Health funded the study.

A Soldier's (Robotic) Best Friend




The video above, from the U.S. army's Benning Report, shows new footage of a robot called BigDog--a sophisticated, four-legged "pack-bot" designed to carry heavy payloads across all kinds of terrain.

Resembling a headless, mechanical canine, BigDog has to be one of the most unsettling robots out there. But it's also one of the more impressive--it can walk up or down hills, through ice, sand, snow and dirt by monitoring sensors in its legs and adjusting its posture accordingly. It can also quickly recover from a stumble or slip. The 250-pound robot, designed by Boston Dynamics, can carry 340 lbs and could provide a valuable safety addition to soldiers in the field.

"There's no robot that can go where a foot soldier goes, helping him carry his load," says Boston Dynamics president Marc Raibert in the video, which documents BigDog testing in at Fort Benning in Georgia. Currently, the combat load for soldiers is 145 lbs. If BigDog could carry some of this payload, soldiers could more deftly maneuver out of dangerous situations. Wheeled and tracked robots are limited, so a robot that could traverse difficult terrain would help save lives, say the soldiers in the video.

The company announced last October that BigDog had used GPS to walk a record distance of 12.8 miles on its own. Conceived in 2003, the robot is still a few years away from helping soldiers in the field. You can see an older video of BigDog successfully recovering from a kick to the gut here.

Tuesday, October 27, 2009

Petman, the only robot having human like movement of limbs


The company that created BigDog--a headless robotic pack mule with an impressively realistic gait--recently released a video of another robot, Petman.

This bipedal bot walks on two legs and can recover from a push, using the same balancing technology that allows BigDog to recover from a kick or keep its balance when walking on ice.

While BigDog was designed to carry payloads for soldiers in the field, Petman will be used for military chemical suit research. In the final version, which should be ready in 2011, Petman will have a range of motions. According to the company:

Unlike previous suit testers, which had to be supported mechanically and had a limited repertoire of motion, PETMAN will balance itself and move freely; walking, crawling and doing a variety of suit-stressing calisthenics during exposure to chemical warfare agents.

The finished Petman will also mimic human physiology, for example sweating in response to temperature and humidity changes, to make it a realistic testing device for the suits.

According to the IEEE's Automaton blog, the prototype currently has a top speed of 3.2 mph. Watch a video of Petman striding smoothly along a treadmill track below.

Ares I-X First Flight


At 8 a.m. EDT today, October 27, NASA launched a test rocket called Ares I-X from Kennedy Space Center in Florida. The rocket is the first new launch vehicle to be tested in nearly four decades and the test will gather data critical to the design and development of Ares I--NASA's new rocket designed to replace the aging space shuttles and take humans to the moon, and possibly to Mars and beyond as part of the Constellation program.

Last week it took engineers almost seven hours to roll Ares I-X to launch pad 39B where it completed its flight readiness review. Now NASA's biggest concern for lift off is the weather. The agency has a four hour launch window, and while it only needs 10 minutes of clear skies for a "go", the forecasters are calling for 60 percent chance of clouds. If the launch is scrubbed, engineers will try again on Wednesday.

The test flight comes at a trying time for NASA, after its plan for the future of human exploration underwent an independent review and the outcome did not favor the Ares I. Despite these findings, NASA officials support the test flight, saying the data gathered will be useful for the design of any future rocket.

"This is the first time in more than 30 years that NASA has built a vehicle in a new configuration so this has been a valuable learning experience," said Doug Cooke, associate administrator for NASA Exploration Systems Mission Directorate in a press release."This test will yield important data to support the nation's next steps in exploration. There is no substitute for hard data--flight testing clarifies the distinction between imagined outcomes and real flight experience."

Follow the launch on Twitter, and the Ares I-X blog, then return to Delta-V for a post-flight analysis.

Monday, October 26, 2009

Ancient 'Monster' Insect: 'Unicorn' Fly Never Before Observed


Just in time for Halloween, researchers have announced the discovery of a new, real-world "monster" -- what they are calling a "unicorn" fly that lived about 100 million years ago and is being described as a new family, genus and species of fly never before observed.

A single, incredibly well-preserved specimen of the tiny but scary-looking fly was preserved for eternity in Burmese amber, and it had a small horn emerging from the top of its head, topped by three eyes that would have given it the ability to see predators coming. But despite that clever defense mechanism, it was apparently an evolutionary dead end that later disappeared.

"No other insect ever discovered has a horn like that, and there's no animal at all with a horn that has eyes on top," said George Poinar, Jr., a professor of zoology at Oregon State University who just announced the new species in Cretaceous Research, a professional journal.

"It was probably a docile little creature that fed on the pollen and nectar of tiny tropical flowers," Poinar said. "But it was really bizarre looking. One of the reviewers of the study called it a monster, and I have to admit it had a face only another fly could have loved. I was thinking of making some masks based on it for Halloween."

This fly lived in the jungles of Myanmar and was found trapped in amber that was from 97 to 110 million years old. The gooey, viscous tree sap that flowed down over the fly and later turned to stone preserved its features in lifelike detail, including its strange horn topped by three functional eyes.

"If we had seen nothing but the wings of this insect, it would have looked similar to some other flies in the family Bibionomorpha," Poinar said. "But this was near the end of the Early Cretacous when a lot of strange evolutionary adaptations were going on. Its specialized horn and eyes must have given this insect an advantage on very tiny flowers, but didn't serve as well when larger flowers evolved. So it went extinct."

Poinar named the new fly Cascoplecia insolitis -- from the Latin "cascus" for old and "insolates" for strange and unusual.

The fly also had other very unusual characteristics, the study found, such as an odd-shaped antenna, unusually long legs that would have helped it crawl over flowers and extremely small vestigial mandibles that would have limited it to nibbling on very tiny particles of food.

Pollen grains found on the legs of the fly suggest that it primarily must have fed on flowers.

This fly lived during the time of the dinosaurs, but also in a period when Triassic and Jurassic species were becoming extinct, modern groups were appearing and angiosperms, or flowering plants, were diversifying. Some of the characteristics of the fly were common to other families found around that time, but others were extremely different -- especially the horn with eyes on top.

The specimen found in amber was well-preserved, lacking only the rear left portion of the abdomen and a portion of the left hind leg. It's rare to find specimens with essentially a complete body as well as wings, scientists noted in the report. The fossil came from an amber mine in the Hukawng Valley of Myanmar, first excavated in 2001.

Poinar is an expert on insects and other life forms that have been preserved in amber, and has used them as clues to create detailed portraits of ancient ecosystems.

"None of the specialized body characters of Cascoplecia occurs on previously reported Cretaceous bibionids," the report concluded. "This 'unicorn' fly was one of the oddities of the Cretaceous world and was obviously an evolutionary dead end."

Unless, of course, it shows up once again as a scary looking Halloween costume -- with wings, grasping claws, and a horn with three piercing eyes on top.

Top 10 Most Incredible Prison Escapes

Every year, thousands of inmates escape from prisons around the world. Of these, most just walk away from minimum-security corrections facilities, but other inmates implement complex, ingenious, and often violent schemes in order to make their getaway. Whether the work of notorious outlaws, WWII G.I.s, or 18th century writers, the following are the top 10 most incredible prison escapes.

10. Gerard’s Tower Of London Escape

tower-of-london

John Gerard was a sixteenth century Jesuit priest who is remembered as one of the only people to ever escape from the notorious Tower of London. Gerard was put in the Tower for carrying out his religious missions during a time when the Catholic Church was under persecution in Elizabethan England. He endured frequent interrogations, and despite never breaking even under torture, he was eventually sentenced to death. Gerard immediately began planning an escape, and was able to communicate with allies on the outside via smuggled notes written in an invisible ink made from orange juice. After one failed attempt, Gerard was able to make his escape when some accomplices rowed a boat into the Tower’s moat and managed to get a rope up to him. Gerard almost fell to his death because his hands were so injured from torture, but he managed to climb down to the boat and was smuggled out of England to live out the rest of his life in Rome.

9. Dillinger’s County Jail Escape

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Legendary 30s outlaw John Dillinger was involved in a number of often violent prison escapes. In 1933, he and his gang engineered a daring escape from a prison in Lima, Ohio after they used smuggled rifles to gun down two guards. But Dillinger’s most famous escape of all came in 1934, after he was arrested on the heels of a number of famous bank heists. Dillinger was put in the “escape-proof” Lake County Jail, a prison that was guarded by an army of policeman and National Guard troops. In what has become something of a legend, Dillinger is said to have fashioned a phony gun out of a bar of soap and used it to force his way out of the jail. In his typical brash style, he then stole the Sheriff’s brand new Ford and made his escape to Illinois. Ironically, it was this move–driving a stolen vehicle across state lines– that got the FBI on his trail and eventually led to his demise.

8. The Libby Prison Escape

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Richmond, Virginia’s Libby Prison was one of the most infamous jails of the Civil War, but it’s also the site of one of the conflict’s most daring escapes. In 1864, a group of 15 Union soldiers under the direction of Col. Thomas E. Rose and Major A.G Hamilton managed to tunnel through the prison’s basement to a nearby vacant lot. This was no easy task, as Libby’s basement was a dark and vermin-infested cellar known to the men as “Rat Hell,” but after seventeen days of digging, they reached a nearby tobacco shed. From here, 109 soldiers managed to escape into the city of Richmond and make a run for the nearby Union lines. 48 of the men were recaptured, and 2 drowned in a nearby river, but 59 managed to make it to the safety of the Federal army. Their escape remains the most successful prison break of the Civil War. Photo by civilwarbattlefields

7. Casanova’s Escape from the Leads

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Venetian writer and adventurer Giacomo Casanova is best remembered for being a ladies’ man, but he is also responsible for one of the all time great prison breaks. In 1753, after gaining a reputation for debauchery and adultery, Casanova was arrested and confined to the Leads prison, so named because it was outfitted with a lead roof that was designed to encourage stifling heat and make escape impossible. After smuggling a metal spike into his cell, Casanova and a renegade priest confined nearby managed to tunnel through the ceiling of their cells. Once through, they pried open the lead plates on the roof and broke into another room through a dormer window. Using a combination of ladders and ropes, the duo managed to make it to the ground floor, and after breaking a lock and sneaking through the prison corridors, they escaped by gondola into the city’s network of rivers. Casanova would later write about the escape in a popular memoir, and though many have speculated that the story may be embellished, evidence from scene of the jailbreak seems to back up his account.

6. Pascal Payet’s Helicopter Escapes

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Many European prisons have exercise yards on their roofs, a feature that French criminal Pascal Payet has repeatedly used to his advantage. Payet was originally jailed for a murder that occurred during a botched robbery on a security van, and was sentenced to thirty years in France’s Luynes Prison. In 2001, he managed to make a daring escape when an accomplice simply picked him up from the prison’s roof with a hijacked chopper. Payet even returned to the prison two years later with another helicopter and proceeded to help three other prisoners make their escape, but all four men were re-captured, and Payet was given another seven-year sentence for his role in the jailbreak. Amazingly, in 2007 Payet again escaped via helicopter, this time from Grasse prison in southeast France. He was lifted off the roof by four masked accomplices who had hijacked a chopper from a nearby airport by threatening to kill the pilot. After landing near the Mediterranean Sea, the pilot was released, and Payet and his accomplices have since disappeared.

5. Dieter Dengler’s Prison Camp Escape

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Dieter Dengler was a German-American Navy pilot who made a famous escape from a jungle prison camp during the Vietnam War. In early 1966, Dengler’s plane was shot down by anti-aircraft fire over Laos, and he was captured and shipped to a prison camp run by the Pathet Lao, a group of North Vietnamese sympathizers. Dengler had earned a reputation for his uncanny ability to escape from mock-POW camps during his military training, and he immediately contributed to a plan the prisoners had to make a getaway. On June 29, 1966, he and six other prisoners managed to escape from their hand and foot restraints and get a hold of the guard’s weapons. After gunning down three guards, Dengler escaped into the dense forest. He would eventually spend 23 days in the jungle enduring extreme heat, insects, leeches, parasites, and starvation before being rescued by an American helicopter. Only one of the other prisoners, a Thai contractor, survived the escape. The others were all either killed or disappeared in the jungle. Dengler would go on to become a successful test pilot in his later years, and to this day he is credited as the only American soldier to successfully escape from a prison camp during the Vietnam War.

4. Escape From Alcatraz

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In 1962, Frank Morris and Clarence and John Anglin used months of meticulous planning to make what has become the prototypical prison escape. The trio were being held in the infamous prison on Alcatraz Island in San Francisco, which was reserved for the most hardened criminals and considered to be one of the most escape-proof prisons ever built. The men used a series of tools including a drill assembled from a vacuum cleaner motor to chip away at the aging concrete in their cells and make it to a nearby ventilation shaft. They then made their way down a chimney to the beach, where they quickly assembled a handmade raft and escaped into the San Francisco Bay. Their escape was not realized until the next morning, as the men had fashioned some dummy heads from soap, human hair, and toilet paper to make it look like they were asleep in their beds. The men were never heard from again, and most evidence suggests they drowned in the bay, but no bodies were ever found.

3. The Maze Prison Escape

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One of the most violent prison escapes of all time, the Maze Prison break took place in 1983, when 35 inmates escaped after taking control of the prison by force. The Maze was reserved for Irish Republican Army paramilitary combatants and terrorists, and was considered to be one of the most inescapable prisons in all of Europe. But after several months of planning, a group of prisoners led by IRA members Gerry Kelly and Bobby Storey seized control of an entire cellblock by using handguns that had been smuggled into the jail. After wounding several of the guards and stealing their uniforms, the prisoners hijacked a car and took over a nearby guard post, but when they couldn’t get past the main gate, the men hopped the fence and made a run for it on foot. All told, 35 men escaped from the prison– sixteen of whom were recaptured soon after–and twenty guards were injured.

2. Billy Hayes’ Escape From Turkish Prison

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Arriving in New York on October 24, 1975, after his five-year ordeal in the Turkish prison system, Billy Hayes displays the new passport that the American embassy in Athens, Greece issued him.

Billy Hayes was an American student who was arrested in 1970 when he tried to smuggle two pounds of hash onto a plane in Turkey. After being caught, he was sentenced to thirty years in the harsh Turkish prison system. Hayes toiled in Sagmilicar Prison for five years, but he was eventually transferred to an island prison in the Sea of Marmara, and it was here that he began to seriously plan his escape. The island had no boats, but a nearby harbor would frequently fill up with small fishing vessels any time there was a strong storm. Hayes spent days hiding in a concrete bin, and when the time was right, he swam to the harbor and stole a small dinghy. From here, he was able to make his way to Greece, and eventually traveled halfway around the world before arriving safely back in the United States. Hayes later wrote a book about his ordeal called Midnight Express, which was adapted into a fictionalized film of the same name.

1. The Great Escape

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For sheer planning, risk, and scale, prison escapes don’t get much more complex than the 1944 escape of 76 Allied soldiers from Stalag Luft III, a German prison that operated during WWII. The escape was the culmination of over a year of work by some 600 prisoners. The men dug three tunnels (nicknamed “Tom,” “Dick,” and “Harry”) 30 feet beneath the surface of the prison with the plan of tunneling past the main fence and surfacing in the nearby forest. This required a sophisticated construction process that included the use of wood blocks for support, a series of lamps, and even a pump to make sure the soldiers digging had enough air to breathe. After gathering a collection of civilian clothes and passports, on March 24, 1944 the soldiers began to make their escape. Unfortunately, the tunnel had come up short of the forest, and as the men surfaced they were in clear sight of the guards. 76 men still managed to escape, but the 77th was spotted and the tunnel was shut down. The Nazis took a special interest in the escaped prisoners, and all but three were eventually caught. Still, thanks to the popularity of the famous movie based on it, as well as its sheer scale and audacity, “the Great Escape” remains one of the most well-known prison escapes of all time.

Sunday, October 25, 2009

Top 10 Failed Military Inventions

Simply, a military invention is one that was invented by the military in order to improve and advance certain military tactics, missions, or overall existence. Today, many of the most common military inventions, such as the GPS or Internet, or used by civilians as well.

When thinking about military inventions, you probably think about things such as high-tech military airplanes like the Stealth bomber, nuclear bombs, ballistic missiles, night vision, the Humvee, and many others. All of those inventions have been pretty much successful in their use. However, there have been inventions that the military has come out with that just don’t work at all. Whether it’s the U.S. Military or Japan’s, some inventions just haven’t worked. Here is a list of ten failed military inventions.

10. Corkscrew Tank

Invented by the Russians, the corkscrew tank was created in order to make its way across rough, rocky, and harsh terrain. The vehicle was able to maneuver across terrain such as snow and ice, which is common in Russia and proved to be somewhat profitable. While it was able to do some of the things it was designed to do, it had many downsides. For one, because of the entirely large corkscrews used, the tank wasn’t able to move across decent terrain. Also, it was heavy, which made it entirely slow, and it lacked suspension and safe steering.

9. One-Wheel Tank/Ball Tank

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Another military invention on the list invented by the Germans, the one wheel tank was made in order for one man to be able to utilize two machine guns while being inside of a heavily armed sphere. However, this invention never made it out of prototype. In all reality, there is no way this invention would have proved helpful to any military member. Though it had a stabilizing wheel, it have great balance. Steering may have also been a problem, though there was a wheel that was shifted side to side by the man inside of the sphere. It is said that the ball tank was able to go fairly fast for an invention of its time.

8. Scooter-mounted Cannon

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Used by the French during Vietnam, this vehicle was put together when the French military was lacking the money to provide more sophisticated equipment. They used what they had and often had to improvise in order to try to keep the military equipped. The scooter-mounted cannon was a scooter like vehicle that held a 75mm cannon. The vehicle was mainly used by paratroopers during the 1950s. However, it’s safe to say that this didn’t last long, as it surely offered no type of protection or even stability during war.

7. Focke-Wulf Triebfluegel

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At the beginning of time, no one could ever imagine being able to fly through the air. However, with no less than genius inventers, it has become a thing of the past in our world. Backing up a little in time, during WWII the Germans were able to create a working helicopter. Though the aircraft was able to get off the ground, get to point B from point A, and land properly, the Nazis seemed to want more. To add more to their invention, they began to use ramjet engines. The Focke-Wulf Triebfluegel soon became useless as it was much too hard to land it with rockets strapped to the propeller blades.

6. Puckle Gun

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The Puckle Gun was created by James Puckle who was a writer and lawyer from London. He created what he called the “Defence Gun” while others deemed it the “Puckle Gun.” No matter what you want to call it, this gun didn’t go far. First made in order to fire against Christian enemies and later to fire upon Muslim Turks, the Puckle Gun was never able to do its task. Created with a tripod-mounted, single barreled flintlock with a multishot revolving cylinder, the gun was able to shoot 63 shots in 7 minutes, compared to the more common three shots per minute, which was standard on the soldier’s musket. The Puckle Gun drew few investors and never achieved mass production or sales to the British armed forces, mostly because British gunsmiths at the time couldn’t easily make the many complicated components.

5. Cybernetic Walking Machine

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The cybernetic walking machine seems like something you’d find out of a true sci-fi movie. It was an experimental quadruped robot that was tested in 1968. It was designed by a man named Ralph Mosher and the machine was supposed to allow the infantry to carry weapons over extremely tough terrain. The robot was controlled by a human through the use of foot and hand movements. There was use of hydraulics, but sadly the robot never went into production. However, the prototype can be found at the U.S. Army Transportation Museum in VA. This robot weighs about 3000lbs and is only able to go up to 5mph.

4. Russian Tsar Tank

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The Russian Tsar Tank literally resembles those bikes you’d see with one huge tire and one small one – a tricycle design. For some reason the Russians thought that this was somehow a safe and usable defense in war. There isn’t any proof that it was ever used during a battle however. In any case, the tsar tank seemed to have stayed in the testing stage. The huge wheels were intended to cross significant obstacles. However, due to miscalculations of the weight, the back wheel was prone to be stuck in soft ground and ditches, and the front wheels were sometimes insufficient to pull it out. This led to a fiasco of tests before the high commission in August 1915. The tank remained in the location where it was tested, some 60 kilometers from Moscow until 1923 when it was finally taken apart for scrap.

3. Charles de Gaulle

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The Charles de Gaulle is probably the most recent invention on this list. Though not a new invention, it was supposed to be an aircraft carrier that used new and improved technology; however, it has proven to be anything but. It was first made in 1986 and weighed about 40,000 tons. It cost over four billion dollars and the French truly believed it would be the next best thing. She is the tenth French aircraft carrier, the first French nuclear-powered surface vessel, and the first and only nuclear-powered carrier built outside of the United States Navy. However, this aircraft carrier was much slower than the one it was meant to replace, which ran on steam. The propellers didn’t work right and the company who produced them went out of business. The engine and nuclear reactor were poorly built and incorrectly installed causing exposure to radiation. The deck was also designed wrong and was not usable as a means to defend the ship.

2. Rocket Belt

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The rocket belt was made in order to allow a soldier to travel safely over a very small distance. It can be compared to a leap. The rocket belt was created in the 1960s and seemed to be promising. During October 1961, the pack was demonstrated personally to President John F. Kennedy in the course of exponential maneuvers on the military base Fort Bragg. However, come the mid -1960s, the military was no longer interested in the rocket belt. Because of its short range, the military didn’t see much use for it. The maximum duration of flight of the rocket pack was 21 seconds, with a range of only 120 m. The military also lost interest in this invention as jet and other aircraft technology was advancing rapidly during this time.

1. Flying Aircraft Carrier – USS Macon/USS Akron

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The flying aircraft carrier was first crafted by German engineers in the early 1930s. Prague-born engineer Dr. Karl Arnstein of Ohio was the one who built the aircraft which took its first flight in April 1933. The first was called the USS Macon and later, the USS Akron, a sister ship, was built. They were both blimp-like and not shaped like today’s aircraft carriers. The USS Macon was able to carry five F9C “Sparrowhawk” airplanes that could be launched as well as retrieved during flight. Following a highly damaging event during 1934 due to flying too high of an altitude over Arizona, the USS Macon crashed on February 12, 1935 due to a structural failure during a storm.

Explosives Camp!


High school students at this University of Missouri–Rolla summer camp would be foolish to grow too fond of anything around them, because chances are they will eventually strap it with explosives and send it skyward. The watermelon shown here was only one of the victims in the department of mining and nuclear engineering’s 2007 program. Participants blew up concrete columns, underground caverns, quarry rock faces, a Shrek doll, and a Barbie while learning from experts about recreational pyrotechnics and military explosives. The festivities began with a fireworks display by the teachers and ended with one by the students.

It’s all meant to whet the appetites of potential engineering students. More than half of the teenagers attending the summer camp end up at the university in one program or another, according to Barbara Robertson, the camp coordinator. Interest in the summer course has grown so much in four years—one mom cried on Robertson’s shoulder this year until Robertson let her kid in—that the university plans to increase enrollment from 40 to 60 next year.

Saturday, October 24, 2009

Engineering Students Rock


Mechanical engineers combined their skills with that of electrical engineering and computer science to create a college class inspired by the Guitar Hero game. The hands-on course requires students to build their own guitar. To do this, students choose a shape for the guitar, which is cut out of lumber by a computer. Located under the guitar strings, magnets detect vibrations and wire coils send an electronic signal to an amplifier and speaker. Effects pedals can also distort the sound and add special effects. Check out the video here:

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Skills from mechanical engineering, electrical engineering and computer science come together to form a cool kind of class that's a hit with students.

The video game Guitar Hero is a chart-busting hit. It was the inspiration that mechanical engineering graduate student and teacher Gavin Garner needed for a class assignment.

"I realized the students enjoyed pretending they were actual guitar players, and I thought, 'Why not have them actually build the real thing in the lab?'" said Garner, of the University of Virginia in Charlottesville, Va.

Garner's class isn't a music class. It's a new hands-on course combining skills from mechanical, electrical and software engineering called mechatronics. Mechanical engineering student Brad Nichols' guitar rocks.

"I was thrilled with the guitar," Nichols said. "I thought it looked great for something that was made with two by fours by students in a lab in two or three weeks. It actually sounds pretty good."

Students pick the shape and a computer automatically cuts the guitar from lumber. Basic magnets, nails and wire coils are mounted under the strings. The magnets pick up the vibrations of the strings and the wire coils send an electronic signal to an amplifier and speaker to produce sound.

"Then, the electrical signal travels down through into these effects pedals which distort the sound and add special effects, which changes the tone of the music," Garner said.

The designs show the creativity that went into the guitars, and the sound shows the science skills that created fun, useable objects that students love. "When I want to appreciate what I learned in school, I'll plug that in and strum around on it a little bit," Nichols said.

Another class assignment had students design a Mech-E-Mouse, a robot programmed to navigate through mazes to find a piece of electronic cheese.

WHAT IS PITCH: Sound waves are pressure waves. A vibrating object creates a disturbance in the surrounding air, much like a stone cast in a quiet pond will cause waves to ripple outward from the spot where the stone hit. All sound waves have wavelength and frequency. Objects that vibrate very quickly create short wavelengths and a high-pitched sound. Objects that vibrate very slowly create long wavelengths and a low-pitched sound. Frequency measures the speed of vibration in a unit called a Hertz (Hz), and 1 Hz is equivalent to 1 vibration per second. Pluck a string on a guitar, and it might vibrate 500 times per second, so the sound wave's frequency would be 500 Hertz. Pitch simply denotes those frequencies within the range of human hearing (from about 20 Hz to 20,000 Hz). The faster the rate of vibration, the higher the pitch; the slower the rate of vibration, the lower the pitch.

WHAT MAKES ELECTRIC GUITARS LOUD? Essentially this is possible because of two items: an amplifier and a pick-up. Amplifiers, as you may expect, increase the amplitude or volume of sound and other signals. For audio amplifiers that means a sound must be turned into an electric signal, and sent into the amplifier before it emerges many times louder than the level at which it was originally produced. It is essentially a speaker whose source can be a guitar, a CD, a microphone, or many other items. A pick-up transforms the movement of guitar strings into an electrical signal that can be transmitted to amplifiers or recording equipment. Some use magnets wrapped inside a coil of wire, while others use alternate methods, such as piezoelectric crystals (which respond to physical stress or deformity by creating electrical energy).

Nokia sues Apple over iPhone's use of patented wireless standards


The cell phone maker has alleged that Apple has violated ten patents owned by Nokia. Specifically, the company claims ownership of technology relating to the Global System for Mobile communications, or GSM; wireless local area network, or WLAN; and Universal Mobile Telecommunications System, or UMTS.

In a press release, the world's largest cell phone manufacturer said it has invested more than 40 billion Euros in research into research and development in the last two decades, earning it one of the "strongest and broadest patent portfolios in the industry." Nokia said it has entered into license agreements with about 40 companies for these patents.

"The basic principle in the mobile industry is that those companies who contribute in technology development to establish standards create intellectual property, which others then need to compensate for," said Ilkka Rahnasto, vice president of Legal & Intellectual Property at Nokia. "Apple is also expected to follow this principle. By refusing to agree appropriate terms for Nokia's intellectual property, Apple is attempting to get a free ride on the back of Nokia's innovation."

The ten patents relate to devices compatible with GSM, UTMS (3G WCDMA) and wireless LAN standards, and cover wireless data, speech coding, security and encryption. Nokia has alleged that all iPhone models released since 2007 infringe on these patents.

The suit was filed in a U.S. District Court in Delaware.

Analyst Gene Munster with Piper Jaffray reacted to the news Thursday with a new note to investors. He said that Nokia's endgame with the suit is patent royalties from Apple.

"We believe that Nokia is not seeking an injunction; rather, we believe that the company has been in talks with Apple concerning a patent royalty payment for over a year," Munster said. "With today's announcement, it appears that the companies have not come to a resolution and Nokia is attempting to hasten the process. Nokia is likely looking to obtain a patent royalty of 1%-2% ($6 to $12) on every iPhone sold in compensation for its IPs concerning GSM, 3G and WiFi technologies on mobile devices."

He went on to say that the most extreme scenario of $12 per iPhone is unlikely, and any unfavorable resolution for Apple would not change his stance on the stock. Piper Jaffray has an overweight rating on AAPL with a price target of $277.

As the iPhone has grown in popularity, Nokia has retained its status as market leader, but has lost significant share of the market it has dominated. As recently as August, Nokia's Symbian mobile platform was said to have a 50 percent market share, well down from the 72 percent the platform had in 2006. In the second quarter of 2009, the iPhone represented 14 percent of global smartphone sales.

Though Nokia still controls the market, competitors Apple and Research in Motion are said to have profit margins that far exceed their market share. In its fourth financial quarter of 2009, Apple saw its profits surge 46 percent, bolstered by a record quarter for iPhone shipments.

Head-up Displays go Holographic


In the last few years, head-up displays (HUDs), which project information onto the driver's view of the road, have started appearing in a few high-end cars. But a more compact kind of projection device, small enough to fit inside a rearview mirror, could see this kind of display more widely deployed.

A head-up display overlays information on a normal view of the road. For example, symbols can be used to show the car's current speed or the distance to the vehicle ahead without the driver having to look away from the road.

The new projection device, developed by Light Blue Optics, based in Cambridge, UK, uses a technique called holographic projection that allows it to be far smaller than current in-car HUD systems. "We can make an HUD so small you can put it into a rearview mirror or wing mirror," says Edward Buckley, Light Blue Optics's head of business development.

Details of Light Blue Optics's prototype were presented today at the Society for Information Display's Vehicles and Photons 2009 symposium, in Dearborn, MI. The prototype projects an image through a two-way wing mirror so that it appears to be about 2.5 meters away, superimposed over the reflected road scene. The picture appears to originate from a point in space in front of the mirror, only from a narrow perspective.

Existing HUDs require relatively large liquid-crystal arrays and optics to generate an image, says Buckley. "In a BMW 5 Series, the size is about five litres," he says. "We can make it about one-tenth of the size. This means you can start to put these virtual image displays where you couldn't previously.''

Holographic projection uses constructive and destructive interference of light to make up the picture, allowing the device to be much smaller. "[Size is] the number-one detriment in getting HUDs into vehicles," says Mark Larry, an expert on in-car displays at Ford who co-chaired the symposium.

Holographic projectors use liquid crystal on silicon (LCOS) to modulate beams of red, green, and blue laser light to create a complete image. Holographic projection does not actually involve creating a hologram, but rather uses principles of holography to create a projected image through optical interference. Buckley says the technology could work equally well on a forward-facing display such as a windshield.

Cell Phones to Go 3-D


A new thin-film technology developed by 3M could enable mobile devices such as cell phones to show 3-D images without the need for special glasses.

Dubbed Vikuiti 3-D, the technology works by guiding slightly different images to the viewer's left and right eyes. Provided that the device is held relatively still, the viewer experiences an "auto-stereoscopic" effect--a sense of depth to the image, says Erik Jostes, business director of 3M's Optical Systems Division in St. Paul, MN.

This optical trick has been around for some time and is essentially the same as the one behind Philips's WOWvx 3-D television displays. However, getting it to work in mobile devices presents new challenges.

In Vikuiti 3-D, prism-shaped reflective structures are embedded on the back of a polymer film, and tiny microlenses are patterned on the front. Together these components steer lights through a liquid-crystal display in front of the film. Light passes through the film from two light-emitting diodes, one positioned to the left and one to the right. The light from each LED bounces off a waveguide and strikes the film at a different angle, causing the embedded optics of the film to steer the light in two different directions.

Because each beam of light passes through a liquid-crystal display showing a slightly different image, providing the display is held at the correct distance, each eye receives a slightly different perspective. To trick the viewer's brain into believing it is seeing the two images at the same time, both the LEDs and the LCD panels have to be switched extremely fast--about 120 times a second, says Jostes.

Mobile devices tend to have both smaller displays and smaller pixels, says David Pepy, general manager of Alioscopy, a company based in Paris, France, that is also developing auto-stereoscopic displays. This means the lens-like structures on the film need to be particularly small, he says.

Not only do the lenses have to be very precisely engineered, Jostes says, but each lens has to be very precisely aligned with the corresponding prism on the back of the film. To achieve this, 3M uses a process called microreplication, a proprietary printing technique that can produce structures tens of micrometers thick in a film just 75 micrometers thick, Jostes

Next Stop: Ultracapacitor Buses


Municipal transit agencies have tried to reduce the carbon footprint of their bus fleets using a range of options over the years, from biofuels and hydrogen to batteries and hybrid-electric diesel. Now a Chinese company and its U.S. partner say that ultracapacitors could offer the greenest and most economical way of powering inner-city buses.

There's just one catch: the best ultracapacitors can only store about 5 percent of the energy that lithium-ion batteries hold, limiting them to a couple of miles per charge. This makes them ineffective as an energy storage medium for passenger vehicles. But what ultracapacitors lack in range they make up in their ability to rapidly charge and discharge. So in vehicles that have to stop frequently and predictably as part of normal operation, energy storage based exclusively on ultracapacitors begins to make sense.

Sinautec Automobile Technologies, based in Arlington, VA, and its Chinese partner, Shanghai Aowei Technology Development Company, have spent the past three years demonstrating the approach with 17 forty-one seat municipal buses on the outskirts of Shanghai. On October 21, the two companies will offer a one-day demonstration at American University in Washington, DC, where an 11-seat minibus running on ultracapacitors will spend the day shuttling people around campus.

The trick is to turn some bus stops along the route into charge stations, says Dan Ye, executive director of Sinautec. Unlike a conventional trolley bus that has to continually touch an overhead power line, Sinautec's ultracapacitor buses take big sips of electricity every two or three miles at designated charging stations, which double as bus stops. When at these stations, a collector on the top of the bus rises a few feet and touches an overhead charging line. Within a couple of minutes, the ultracapacitor banks stored under the bus seats are fully charged.

"It's a brilliant concept," says ultracapacitor expert Joel Schindall, professor of electrical engineering and computer science at MIT. "It's not well suited for electric-only cars, but it is practical to stop a bus every few city blocks."

Friday, October 23, 2009

Dye-Sensitized Solar to Go


The first commercial product to incorporate dye-sensitized thin-film solar cells will soon be on the market. Backpacks coated with the cheap, lightweight, and flexible solar cell, for on-the-go recharging of portable gadgets, were unveiled at the Hong Kong Electronics Fair last week.

The solar cells, made by Cardiff, U.K.-based G24 Innovations, are based on technology invented by Michael Grätzel, a chemistry professor at the École Polytechnique Fédérale de Lausanne in Switzerland.

In this type of solar cell, dye-coated semiconductor nanocrystals are sandwiched between glass panels or embedded in plastic along with an electrolyte. The dye absorbs light and creates electrons, which are transferred to the semiconductor and then out into a circuit. Dye-sensitized cells have lower light-to-electricity conversion efficiencies than the best thin-film solar cells, but they are considerably cheaper to manufacture and can also be printed on flexible surfaces.

Grätzel says that dye-sensitized solar cells have further practical advantages over other thin-film solar technologies. Amorphous silicon thin-film cells degrade in sunlight over time, and their efficiency also goes down if sunlight hits them at an angle. Dye-based cells work well at wide angles and are longer lasting. Plus, they work more efficiently in indoor light, because the dye absorbs diffuse sunlight and fluorescent lighting well.

G24 Innovations says that it uses a low-cost, roll-to-roll process to make its flexible solar modules, which produce 0.5 watts of power under direct sunlight. Last week, the company shipped its first solar-module shipment to Hong Kong-based company Mascotte Industrial Associates, which makes the new bags. G24 uses ruthenium dyes coated on titanium dioxide nanocrystals and an iodide-containing nonvolatile electrolyte. The company's cells are over 12 percent efficient at converting light into electricity.

G24 plans to market modules that could be patched on clothing, tents, and awnings. The modules could also be cheaply incorporated into power-generating windows and billboards. "It's definitely a great moment for us," Grätzel says. "There has been talk of when the first commercial product will be coming out, and this has happened now."

Only one other company, Dyesol, is close to making commercial dye-sensitized solar-cell products. In October 2008, Dyesol opened a factory in Queanbeyan, Australia, to make tiles that can be integrated into building facades. Electronics giant Sony is also conducting research on dye-sensitized solar cells and announced last year that it had reached efficiencies of 10 percent--a level necessary for commercial products. The electronics maker showcased conceptual lamps based on these cells, but it doesn't have commercial products in the pipeline yet.

The solar cells may have a small niche in the market right now. But, says Michael McGehee, materials science and engineering professor at Stanford University, "in the future we may see this technology compete with the more traditional thin-film solar technologies based on amorphous silicon, cadmium telluride, and cadmium indium gallium arsenide if the combination of efficiency, cost, and durability improves."

"It's an exciting time for dye-sensitized solar cells," Grätzel says, adding that he expects to see many more products on the market soon.

Other researchers, meanwhile, are working on advanced versions of the cells using nonvolatile electrolytes and organic dyes, which could make them even cheaper and more robust.

Awakening Paralyzed Limbs


A monkey with a paralyzed arm can still grasp a ball, thanks to a novel system designed to translate brain signals into complex muscle movements in real time. The research, presented at the Society for Neuroscience conference in Chicago this week, could one day allow people with spinal cord injury to control their own limbs.

"This is a big leap forward--they show the monkey using the ability to artificially contract his hand to actually pick up a ball," says Krishna Shenoy, a neuroscientist at Stanford University. "I think it's the first demonstration of a cortically controlled electrical stimulation system performing a task that would ultimately be useful for a human patient."

While spinal cord injury keeps the brain's electrical signals from reaching muscles, people paralyzed by these injuries often have intact nerves and muscles in their limbs. A technique called functional electrical stimulation (FES), in which implanted electrodes deliver electrical current to trigger muscle contractions, provides a way to reconnect this loop.

Devices that can restore hand function and bladder control to some paralyzed patients have already been approved by the U.S. Food and Drug Administration. Patients use residual muscle movement to consciously control these systems--a system that works well for some applications but limits the complexity of the movement that can be performed. For example, an FES device allows people to shrug a shoulder to trigger a grasping motion with their hand, but they cannot control how tightly to grasp..

Now, by pairing FES technology with brain implants, scientists are trying to create a more intuitive system for controlling paralyzed limbs, such that thinking about moving an arm or grasping with a hand would automatically be translated into the pattern of electrical activity needed to perform that movement. "It's much more natural, and if you can decode activity in enough muscles, you could move multiple joints simultaneously," says Robert Kirsch, a neuroscientist at Case Western Reserve University, in Cleveland, OH. Normal hand and arm motion involves fluid movement of multiple joints, rather than the limited movements possible today.

Christian Ethier, a researcher in neuroscientist Lee Miller's lab at Northwestern University, in Chicago, has demonstrated the first steps toward this kind of system in monkeys. Researchers gave each monkey a local anesthetic to temporarily block the function of the flexor nerves in its arm. The animals had wires implanted into their arms to deliver electrical stimulus to the muscles, much like nerves would, and an array of electrodes implanted in the brain to record electrical activity from the motor cortex.

The monkeys were first trained to pick up a ball and put it in a hole to earn a reward. Using brain activity recorded during this task, the scientists developed specialized decoder algorithms that would translate brain activity linked to the movement of different muscles into an electrical stimulus for each of five flexor muscles in the arm in real time, enabling the monkey to grasp its hand. "We can predict what the monkey is trying to do with his muscles and stimulate the muscles accordingly, essentially giving the monkey voluntary control through the computer instead of his nerves," says Miller.

Normally, with the paralyzed arm, the animals had a difficult time completing the task, getting the ball into the target only about 10 percent of the time, compared to 100 percent before the nerve block. Turning on the brain-controlled FES system boosted the paralyzed animals' success rate to 77 percent. The researchers also showed they could get the monkey to move its wrist in different directions--they now want to see if they can repeat the results with the muscles that control reaching.

Human tests might not be far off. Cortical implants are already being tested in human patients. Case Western's Kirsch presented research at the conference showing that a paralyzed patient with a cortical implant could control a sophisticated computer model of an arm. Kirsch and Miller don't yet have a specific timeline to put the two systems--the cortical implant and the FES implant--together in humans, but Miller says it would be technically feasible in a year. However, they want to wait until scientists have developed a wireless and fully-implantable version of the cortical implant, which is now underdevelopment at Brown University. Current implants have protruding wires that increase risk of infection and limit patients' mobility.

Previous research has shown that patients with these implants can control a computer cursor and make some movements with a robotic arm. While that research is exciting for people whose limbs have been amputated, the new research is applicable to patients with spinal cord injury. "Many people would strongly prefer to have their arm reanimated in some way," says Shenoy. "This is a big step forward for that patient population."