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I risultati di un recente studio condotto tra i ghiacci dell’Antartide attribuiscono un nuovo e inquietante ruolo agli oceani, che per colpa del riscaldamento delle loro acque si trasformerebbero in enormi e potenti amplificatori dell’effetto serra.

Amico oceano

Gli oceani catturano circa il 30% della CO2 prodotta dalle attività umane (30 miliardi di tonnellate l’anno secondo l’ONU) e la nascondono nelle loro profondità. Questo sequestro naturale dell’anidride carbonica contribuisce a contenere il surriscaldamento globale del pianeta e i suoi effetti.

Lo stoccaggio oceanico della CO2 non è però permanente: secondo gli studi ha una durata compresa tra i 400 e i 1300 anni, al termine dei quali viene di nuovo rilasciata nell’atmosfera.

Ma qualcosa in questo meccanismo sembra essersi inceppato: il progressivo aumento delle temperature avrebbe infatti velocizzato il processo e gli oceani avrebbero cominciato a rilasciare le loro scorte di CO2 dopo soli 2 secoli, aumentando così la quantità totale di gas serra nell’atmosfera.

Ma quanta fretta, dove corri...

Tas van Ommen della Australian Antarctic Division di Hobart ha analizzato delle bolle di CO2 intrappolate nei ghiacci di Siple e Byrd, nell’Antartico Occidentale, le ha datate e la confrontate con i ati sulle temperature medie di quello stesso periodo.

Lo scienziato ha scoperto che all’aumento delle temperature segue regolarmente un incremento nelle emissioni di CO2 oceanica e che l’intervallo di tempo tra il sequestro e il rilascio del gas sta diventando inferiore ai 200 anni.
Ma in che modo l’aumento delle temperature influenza le emissioni di CO2? "Pensate a una bottiglia di Coca Cola: aumentando la temperatura, l’andiride carbonica disciolta nel liquido sale verso la superficie e fugge" ha spiegato Ommen ai media. Non solo: l’aumento delle temperature favorisce il rimescolamento delle acque profonde e la salita verso la superficie delle bolle di gas.

Ommen ha presentato i dati del suo studio alla conferenza sul clima Greenhouse 2011 che si è tenuta a Cairns, in Australia, nei giorni scorsi ma ha ammesso che prima di poterli applicare alla situazione attuale per trarre conclusioni sull’evoluzione del clima del pianeta occorreranno ancora attente verifiche.

Fonte: Focus.it

 

They also believe rescue attempts are futile as billions more euros will be paid to bail out Greece.

A poll by German newspaper, the Frankfurter Allgemeine, found 71 per cent had “doubt,” “no trust” or thought there is “no future” for the euro. Only 19 per cent expressed “confidence” in it.

Sixty eight per cent said they did not think the emergency bail out of Greece would work.

A separate poll last week showed more than half of Germans thought that Greece should be thrown out of the euro.
Rumours are also rife in Germany that Deutsche Mark bank notes are being printed again in preparation for ditching the euro.

It is said Germany’s central bank, the Bundesbank, has been ordered to print marks as part of contingency plans to leave Europe’s single currency.

This would be an extraordinary step for Germany and would deepen the growing divide between Europe’s leading states.

Since its introduction in 1999, the euro has had a tough time trying to win over a sceptical German public, who saw the mark – one of the world’s most stable currencies – as a symbol of post-war prosperity, second only to the US dollar as the reserve option for investors.

Story Image

Chancellor Angela Merkel now faces her biggest crisis. The opposition is speculating her government may fall as Germans become more vocal in their opposition to bailing out Greece.

Source: express.co.uk

 
By Admin (from 27/06/2011 @ 11:00:58, in en - Global Observatory, read 903 times)

If a new development from labs at MIT pans out as expected, someday the entire surface area of a building’s windows could be used to generate electricity — without interfering with the ability to see through them.

Turning windows into powerplants

Richard Lunt, one of the researchers who developed the new transparent solar cell, demonstrates its transparency using a prototype cell. Photo: Geoffrey Supran

The key technology is a photovoltaic cell based on organic molecules, which harnesses the energy of infrared light while allowing visible light to pass through. Coated onto a pane of standard window glass, it could provide power for lights and other devices, and would lower installation costs by taking advantage of existing window structures.
These days, anywhere from half to two-thirds of the cost of a traditional, thin-film solar-power system comes from those installation costs, and up to half of the cost of the panels themselves is for the glass and structural parts, said Vladimir Bulovi?, professor of electrical engineering in the Department of Electrical Engineering and Computer Science. But the transparent photovoltaic system he developed with Richard Lunt, a postdoctoral researcher in the Research Laboratory of Electronics, could eliminate many of those associated costs, they say.
A paper by Bulovi? and Lunt describing their new system has been published online in the journal Applied Physics Letters, and will appear in a forthcoming issue of the print edition.

Previous attempts to create transparent solar cells have either had extremely low efficiency (less than 1 percent of incoming solar radiation is converted to electricity), or have blocked too much light to be practical for use in windows. But the MIT researchers were able to find a specific chemical formulation for their cells that, when combined with partially infrared-reflective coatings, gives both high visible-light transparency and much better efficiency than earlier versions — comparable to that of non-transparent organic photovoltaic cells.

Turning windows into powerplants

A prototype of the MIT researchers' transparent solar cell is seen on top of a promotional item for MIT's 150th anniversary celebrations. Photo: Geoffrey Supran

In a new building, or one where windows are being replaced anyway, adding the transparent solar cell material to the glass would be a relatively small incremental cost, since the cost of the glass, frames and installation would all be the same with or without the solar component, the researchers say, although it is too early in the process to be able to estimate actual costs. And with modern double-pane windows, the photovoltaic material could be coated on one of the inner surfaces, where it would be completely protected from weather or window washing. Only wiring connections to the window and a voltage controller would be needed to complete the system in a home.

In addition, much of the cost of existing solar panels comes from the glass substrate that the cells are placed on, and from the handling of that glass in the factory. Again, much of that cost would not apply if the process were made part of an existing window-manufacturing operation. Overall, Bulovi? says, “a large fraction of the cost could be eliminated” compared to today’s solar installations.
This will not be the ultimate solution to all the nation’s energy needs, Bulovi? says, but rather it is part of “a family of solutions” for producing power without greenhouse-gas emissions. “It’s attractive, because it can be added to things already being deployed,” rather than requiring land and infrastructure for a whole new system.

Fine-tuning the cells

The work is still at a very early stage, Bulovi? cautions. So far, they have achieved an efficiency of 1.7 percent in the prototype solar cells, but they expect that with further development they should be able to reach 12 percent, making it comparable to existing commercial solar panels. “It will be a challenge to get there,” Lunt says, “but it’s a question of excitonic engineering,” requiring optimization of the composition and configuration of the photovoltaic materials.
The researchers expect that after further development in the lab followed by work on manufacturability, the technology could become a practical commercial product within a decade. In addition to being suitable for coating directly on glass in the manufacture of new windows, the material might also be coated onto flexible material that could then be rolled onto existing windows, Lunt says.
Using the window surfaces of existing buildings could provide much more surface area for solar power than traditional solar panels, Bulovi? says. In mornings and evenings, with the sun low in the sky, the sides of big-city buildings are brightly illuminated, he says, and that vertical “footprint” of potential light-harvesting area could produce a significant amount of power.

Max Shtein, associate professor of materials science and engineering at the University of Michigan, says, “This work demonstrates a useful effect, and is based on very sound science and engineering.” But he adds that “it is but one of the many other methods by which a similar functionality could be achieved,” and says the biggest uncertainty at this point is that because they are so new, “the lifetime of organic PV cells is a bit of an unknown at this point, though there is some hope.”

In addition, Shtein says, “The potential of this technology is good if projected far into the future,” but only if the efficiency can be improved as the researchers expect it can.

As added benefits, the manufacturing process for the MIT researchers' solar cells could be more environmentally friendly, because it does not require the energy-intensive processes used to create silicon solar cells. The MIT process of fabricating solar cells keeps the glass panes at ordinary room temperature, Bulovi? noted. Installations of the new system would also block much of the heating effect of sunlight streaming through the windows, potentially cutting down on air conditioning needs within a building.

The research was funded by the Center for Excitonics, an Energy Frontier Research Center funded by the U.S. Department of Energy.

Source: PhysOrg

 
By Admin (from 26/06/2011 @ 08:00:18, in en - Global Observatory, read 558 times)

For many years the only way to fight fire was water. Come the 20'th century and special foams and powders which are somewhat more effective but are used in a fundamentally similar fashion - hose, bucket or pressurized container and drench. But now a team of Harvard scientists were able to demonstrate a new way of fighting fires - using a powerful blast of electric current.

During a recent meeting of the American Chemical Society the scientists described a way of extinguishing fire using 600-watt amplifier which directs the electrical current into a beam. The scientists went on to demonstrate how they extinguish a foot high flame using the device time and time again from a distance.

How this magic is done is apparently not well understood at this point and several factors might go into play here. However it seems that carbon particles which are created during the combustion process can be easily charged and from this point on they respond to electrical fields in ways which are not fully understood but can cause the flame to lose its stability.

Researchers believe that with further research they can reduce the amount of power needed to perform this kind of trick to several dozen watts and reduce the size of the device to a backpack unit or even a hand held device.

This kind of technology can open a completely new area in firefighting and although it is still many years before we can even dream of extinguishing forest fires with electrical power (if this task is even possible) smaller fires in closed buildings might benefit from such a technology.

Source: TheFutureofThings.com

 
By Admin (from 24/06/2011 @ 08:00:37, in en - Global Observatory, read 733 times)

Researchers have achieved a breakthrough in quantum communications and computing using a teleporter and a paradoxical cat.

The breakthrough is the first-ever transfer, or teleportation, of a particular complex set of quantum information from one point to another, opening the way for high-speed, high-fidelity transmission of large volumes of information, such as quantum encryption keys, via quantum communications networks.

Beam me up ... Quantum teleporter breakthrough

Beam me up ... the teleporter in the lab of Professor Akira Furusawa at the University of Tokyo

The research was published in the April edition of the journal Science.
Teleportation – the transfer of quantum information from one location to another using normal, "classical" communications - is one of the fundamental quantum communication techniques.

The cat in the equation was not a living, breathing feline but rather "wave packets" of light representing the famous "thought experiment" known as Schrodinger’s Cat. Schrodinger’s Cat was a paradox proposed by early 20th century physicist Erwin Schrodinger to describe the situation in which normal, "classical" objects can exist in a quantum "superposition" - having two states at once.

Professor Elanor Huntington, in the School of Engineering and Information Technology at UNSW's Canberra campus at the Australian Defence Force Academy (ADFA), was part of a team led by University of Tokyo researchers. She said the team’s achievement was another step towards building a super-powerful quantum computer and transmitting quantum information.

"One of the limitations of high-speed quantum communication at present is that some detail is lost during the teleportation process. It’s the Star Trek equivalent of beaming the crew down to a planet and having their organs disappear or materialise in the wrong place. We’re talking about information but the principle is the same – it allows us to guarantee the integrity of transmission.

"Just about any quantum technology relies on quantum teleportation. The value of this discovery is that it allows us, for the first time, to quickly and reliably move quantum information around. This information can be carried by light, and it’s a powerful way to represent and process information. Previous attempts to transmit were either very slow or the information might be changed. This process means we will be able to move blocks of quantum information around within a computer or across a network, just as we do now with existing computer technologies.

"If we can do this, we can do just about any form of communication needed for any quantum technology."

The experiments were conducted on a machine known as "the teleporter" in the laboratory of Professor Akira Furusawa in the Department of Applied Physics in the University of Tokyo.

Professor Huntington, who leads a research program for the Centre for Quantum Computation and Communication, developed the high-speed communication part of the teleporter at UNSW’s Canberra campus with PhD student James Webb.

Source: PhysOrg

 
By Admin (from 22/06/2011 @ 14:00:17, in en - Global Observatory, read 827 times)

Scientists have moved a step closer to being able to develop a computer model of the brain after developing a technique to map both the connections and functions of nerve cells in the brain together for the first time.

A new area of research is emerging in the neuroscience known as 'connectomics'. With parallels to genomics, which maps the our genetic make-up, connectomics aims to map the brain's connections (known as 'synapses'). By mapping these connections -- and hence how information flows through the circuits of the brain -- scientists hope to understand how perceptions, sensations and thoughts are generated in the brain and how these functions go wrong in diseases such as Alzheimer's disease, schizophrenia and stroke.

Mapping the brain's connections is no trivial task, however: there are estimated to be one hundred billion nerve cells ('neurons') in the brain, each connected to thousands of other nerve cells -- making an estimated 150 trillion synapses. Dr Tom Mrsic-Flogel, a Wellcome Trust Research Career Development Fellow at UCL (University College London), has been leading a team of researchers trying to make sense of this complexity.

"How do we figure out how the brain's neural circuitry works?" he asks. "We first need to understand the function of each neuron and find out to which other brain cells it connects. If we can find a way of mapping the connections between nerve cells of certain functions, we will then be in a position to begin developing a computer model to explain how the complex dynamics of neural networks generate thoughts, sensations and movements."

Nerve cells in different areas of the brain perform different functions. Dr Mrsic-Flogel and colleagues focus on the visual cortex, which processes information from the eye. For example, some neurons in this part of the brain specialise in detecting the edges in images; some will activate upon detection of a horizontal edge, others by a vertical edge. Higher up in visual hierarchy, some neurons respond to more complex visual features such as faces: lesions to this area of the brain can prevent people from being able to recognise faces, even though they can recognise individual features such as eyes and the nose, as was famously described in the book The Man Who Mistook Wife for a Hat by Oliver Sachs.

In a study published online April 10 in the journal Nature, the team at UCL describe a technique developed in mice which enables them to combine information about the function of neurons together with details of their synaptic connections.

The researchers looked into the visual cortex of the mouse brain, which contains thousands of neurons and millions of different connections. Using high resolution imaging, they were able to detect which of these neurons responded to a particular stimulus, for example a horizontal edge.

Taking a slice of the same tissue, the researchers then applied small currents to a subset of neurons in turn to see which other neurons responded -- and hence which of these were synaptically connected. By repeating this technique many times, the researchers were able to trace the function and connectivity of hundreds of nerve cells in visual cortex.

The study has resolved the debate about whether local connections between neurons are random -- in other words, whether nerve cells connect sporadically, independent of function -- or whether they are ordered, for example constrained by the properties of the neuron in terms of how it responds to particular stimuli. The researchers showed that neurons which responded very similarly to visual stimuli, such as those which respond to edges of the same orientation, tend to connect to each other much more than those that prefer different orientations.

Using this technique, the researchers hope to begin generating a wiring diagram of a brain area with a particular behavioural function, such as the visual cortex. This knowledge is important for understanding the repertoire of computations carried out by neurons embedded in these highly complex circuits. The technique should also help reveal the functional circuit wiring of regions that underpin touch, hearing and movement.

"We are beginning to untangle the complexity of the brain," says Dr Mrsic-Flogel. "Once we understand the function and connectivity of nerve cells spanning different layers of the brain, we can begin to develop a computer simulation of how this remarkable organ works. But it will take many years of concerted efforts amongst scientists and massive computer processing power before it can be realised."

The research was supported by the Wellcome Trust, the European Research Council, the European Molecular Biology Organisation, the Medical Research Council, the Overseas Research Students Award Scheme and UCL.

"The brain is an immensely complex organ and understanding its inner workings is one of science's ultimate goals," says Dr John Williams, Head of Neuroscience and Mental Health at the Wellcome Trust. "This important study presents neuroscientists with one of the key tools that will help them begin to navigate and survey the landscape of the brain."

Source: Science Daily

 

A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells.

The researchers found a way to make an “optical battery,” said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics.

In the process, they overturned a century-old tenet of physics.

“You could stare at the equations of motion all day and you will not see this possibility. We’ve all been taught that this doesn’t happen,” said Rand, an author of a paper on the work published in the Journal of Applied Physics. “It’s a very odd interaction. That’s why it’s been overlooked for more than 100 years.”

Light has electric and magnetic components. Until now, scientists thought the effects of the magnetic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity, the light field can generate magnetic effects that are 100 million times stronger than previously expected. Under these circumstances, the magnetic effects develop strength equivalent to a strong electric effect.

“This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation,” Rand said. “In solar cells, the light goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load. Instead of the light being absorbed, energy is stored in the magnetic moment. Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power source.”

What makes this possible is a previously undetected brand of “optical rectification,” says William Fisher, a doctoral student in applied physics. In traditional optical rectification, light’s electric field causes a charge separation, or a pulling apart of the positive and negative charges in a material. This sets up a voltage, similar to that in a battery. This electric effect had previously been detected only in crystalline materials that possessed a certain symmetry.

Rand and Fisher found that under the right circumstances and in other types of materials, the light’s magnetic field can also create optical rectification.

“It turns out that the magnetic field starts curving the electrons into a C-shape and they move forward a little each time,” Fisher said. “That C-shape of charge motion generates both an electric dipole and a magnetic dipole. If we can set up many of these in a row in a long fiber, we can make a huge voltage and by extracting that voltage, we can use it as a power source.”

The light must be shone through a material that does not conduct electricity, such as glass. And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn’t this intense on its own, but new materials are being sought that would work at lower intensities, Fisher said.

“In our most recent paper, we show that incoherent light like sunlight is theoretically almost as effective in producing charge separation as laser light is,” Fisher said.

This new technique could make solar power cheaper, the researchers say. They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to useable energy. That’s equivalent to today’s commercial-grade solar cells.

“To manufacture modern solar cells, you have to do extensive semiconductor processing,” Fisher said. “All we would need are lenses to focus the light and a fiber to guide it. Glass works for both. It’s already made in bulk, and it doesn’t require as much processing. Transparent ceramics might be even better.”

In experiments this summer, the researchers will work on harnessing this power with laser light, and then with sunlight.
The paper is titled “Optically-induced charge separation and terahertz emission in unbiased dielectrics.” The university is pursuing patent protection for the intellectual property.

Source: PhysOrg

 
By Admin (from 19/06/2011 @ 11:00:47, in en - Global Observatory, read 540 times)

Researchers here have created the first electronic circuit to merge traditional inorganic semiconductors with organic "spintronics" – devices that utilize the spin of electrons to read, write and manipulate data.

Ezekiel Johnston-Halperin, assistant professor of physics, and his team combined an inorganic semiconductor with a unique plastic material that is under development in colleague Arthur J. Epstein's lab at Ohio State University.

Last year, Epstein, Distinguished University Professor of physics and chemistry and director of the Institute for Magnetic and Electronic Polymers at Ohio State, demonstrated the first successful data storage and retrieval on a plastic spintronic device.

Now Johnston-Halperin, Epstein, and their colleagues have incorporated the plastic device into a traditional circuit based on gallium arsenide. Two of their now-former doctoral students, Lei Fang and Deniz Bozdag, had to devise a new fabrication technique to make the device.

In a paper published online today in the journal Physical Review Letters, they describe how they transmitted a spin-polarized electrical current from the plastic material, through the gallium arsenide, and into a light-emitting diode (LED) as proof that the organic and inorganic parts were working together.

"Hybrid structures promise functionality that no other materials, neither organic nor inorganic, can currently achieve alone," Johnston-Halperin said. "We've opened the door to linking this exciting new material to traditional electronic devices with transistor and logic functionality. In the longer term this work promises new, chemically based functionality for spintronic devices."

Normal electronics encode computer data based on a binary code of ones and zeros, depending on whether an electron is present or not within the material. But researchers have long known that electrons can be polarized to orient in particular directions, like a bar magnet. They refer to this orientation as spin -- either "spin up" or "spin down" -- and this approach, dubbed spintronics, has been applied to memory-based technologies for modern computing. For example, the terabyte drives now commercially available would not be possible without spintronic technology.

If scientists could expand spintronic technology beyond memory applications into logic and computing applications, major advances in information processing could follow, Johnston-Halperin explained. Spintronic logic would theoretically require much less power, and produce much less heat, than current electronics, while enabling computers to turn on instantly without "booting up."

Hybrid and organic devices further promise computers that are lighter and more flexible, much as organic LEDs are now replacing inorganic LEDs in the production of flexible displays.

A spintronic semiconductor must be magnetic, so that the spin of electrons can be flipped for data storage and manipulation. Few typical semiconductors – that is, inorganic semiconductors – are magnetic. Of those that are, all require extreme cold, with operating temperatures below ?150 degrees Fahrenheit or ?100 degrees Celsius. That's colder than the coldest outdoor temperature ever recorded in Antarctica.

"In order to build a practical spintronic device, you need a material that is both semiconducting and magnetic at room temperature. To my knowledge, Art's organic materials are the only ones that do that," Johnston-Halperin said. The organic magnetic semiconductors were developed by Epstein and his long-standing collaborator Joel S. Miller of the University of Utah.

The biggest barrier that the researchers faced was device fabrication. Traditional inorganic devices are made at high temperatures with harsh solvents and acids that organics can't tolerate. Fang and Bozdag solved this problem by building the inorganic part in a traditional cleanroom, and then adding an organic layer in Epstein's customized organics lab – a complex process that required a redesign of the circuitry in both parts.

"You could ask, why didn't we go with all organics, then?" Johnston-Halperin said. "Well, the reality is that industry already knows how to make devices out of inorganic materials. That expertise and equipment is already in place. If we can just get organic and inorganic materials to work together, then we can take advantage of that existing infrastructure to move spintronics forward right away."

He added that much work will need to be done before manufacturers can mass-produce hybrid spintronics. But as a demonstration of fundamental science, this first hybrid circuit lays the foundation for technologies to come.

For the demonstration, the researchers used the organic magnet, which they made from a polymer called vanadium tetracyanoethylene, to polarize the spins in an electrical current. This electrical current then passed through the gallium arsenide layer, and into an LED.

To confirm that the electrons were still polarized when they reached the LED, the researchers measured the spectrum and polarization of light shining from the LED. The light was indeed polarized, indicating the initial polarization of the incoming electrons.

The fact that they were able to measure the electrons' polarization with the LED also suggests that other researchers can use this same technique to test spin in other organic systems.

Source: PhysOrg

 
By Admin (from 16/06/2011 @ 08:00:42, in en - Global Observatory, read 553 times)

Solar cells made from organic materials are inexpensive, lightweight and flexible, but their performance lags behind cells that contain silicon or other inorganic materials. Cornell chemist William Dichtel and colleagues have found a way to synthesize ordered organic films that could be a major step toward solving this problem.

Organic 2-D films could lead to better solar cells

Molecular building blocks assemble on graphene to provide oriented and ordered covalent organic frameworks. (Fernando Uribe-Romo)

It's the first time researchers have been able to coax materials known as covalent organic frameworks (COFs) out of their common powdered form into flat sheets of precisely ordered molecules on a conductive surface. That clears a major hurdle toward using COFs to replace the more expensive, less versatile materials used in solar cells and other electronics today.

The research appears in the April 8 issue of Science.

COFs have a variety of properties that are not found in traditional organic polymers, including excellent thermal stability, high surface area and permanent porosity. But while researchers have identified them as intriguing candidates for such devices, they have been hamstrung by the fact that the materials normally exist only as insoluble powders.

Dichtel, assistant professor of chemistry and chemical biology, and colleagues developed a simple process for growing thin (25-400 nanometers thick) films of COFs on a surface of graphene, a single-atom-thick sheet of carbon. They used X-ray diffraction at the Cornell High Energy Synchrotron Source (CHESS) to determine the materials' structure and orientation. The COFs grow as continuous films of well ordered, stacked layers on the graphene surfaces.

Unlike the powder form, the films grown on transparent surfaces can be probed using modern optical measurements. Researchers can also vary the properties of the frameworks by altering the structure of their components.

"These materials are so versatile -- we can tune the properties rationally, rather than relying on molecules to pack into films unpredictably," Dichtel said.

To demonstrate, the researchers created three variations of the frameworks. Of the three, one shows particular promise for solar cells -- it uses molecules called phthalocyanines, which are commonly found in industrial dyes used in products from blue jeans to ink pens.

Phthalocyanines, which are related to chlorophyll, absorb light over most of the solar spectrum -- a rare property for a single organic material.

"Obtaining these materials as films on electrode materials is a major step toward studying and using them in devices," Dichtel said. "This method represents a general way to assemble molecules on surfaces predictably. This work opens the door to take these materials in many other directions."

Source: PhysOrg

 

It's often said the eye is the window to the soul. But in this case, the eye is the window to Windows. At least, that was the goal when EyeTech Digital Systems enlisted the help of some BYU engineering students in creating an all-in-one eye-tracking system.

The idea behind the project was to create an inexpensive computer system that could be controlled completely with a person’s eyes. The hope was that this system could be used by people with disabilities in parts of the world where they can’t afford expensive eye-tracking systems.

The students created the tablet for their yearlong engineering capstone project that has students solving real engineering problems with real clients. Their client was EyeTech Digital Systems, an Arizona-based company that designs and develops eye-tracking hardware and software.

A separate BYU engineering team also worked with EyeTech last year to develop and improve the initial eye-tracking technology, but the focus of this year’s project was to integrate the eye tracking into a housing that resembles a thick tablet PC.

“They had a lot to learn about how to put together a PC, but the final result speaks for itself,” said Robert Chappell, the CEO of EyeTech. “We’ve worked with the engineering capstones two years in a row now, and I noticed the same thing both years: the teams always come up with a lot of creative, sometimes crazy ideas at the beginning, but after three or four months they know what they need to do, and they implement it very well.”

The finished product has a touch screen, runs Windows 7 and has the eye-tracking system built in — not bad for a device that’s only 2 inches thick, 10 inches long and 14 inches wide.

After performing a quick calibration, the system can move the mouse to wherever the user is currently looking. The system can run everything from Solitaire to Skype, and all it takes is a blink to click.

BYU student Nathan Christensen was on the team that developed the eye-tracking system.

Jedediah Nieveen, the captain for this year’s team, said the project was a challenge, but one that was rewarding on many levels.

“A lot of times in school you just work problems out of books,” he said. “But this allowed us to take what we learned and apply it to something in real life, something that can help a lot of people, and that’s really helped me.”

Although the primary purpose of the product is to help people with disabilities, the technology could also have broader applications in the fields of research, advertising and possibly even gaming.

Greg Bishop, an adjunct professor of mechanical engineering, is the team's faculty coach. Nieveen, Nathan Christensen, Clint Collins, Bryan Johnson, Vicky Lee and Scott Rice were the students involved in the project.

Source: physorg - Provided by Brigham Young University

 

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sir are you encouraging people participate in some kind of game? ...where people give up their power? It never worked before .... that’s why I suggest instead of give up your power, exercise it from y...
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Asta e marihoana nu?ei cine te poate opri so faci ,eu nu prefer astfel de fistractie deoarece am vazut ca dupa nu mai faci altceva fecit ca dormi bine,nu am incercat nu incerc dar nu opresc pe nimeni ...
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By Alex Andu
... deci şi Toma e securist, logic!
27/09/2014 @ 15:49:04
By Bogdan Sith Huşanu
Mai voinicilor,voi nu stiati ca inainte de 89,securistii erau omul si copacul,,ei acum sint si mai multi,cred ca au dat si lastari,ce naiba..!..
27/09/2014 @ 15:45:01
By Toma Pasculea
E greu de crezut că mişcă ceva de calibru în massmedia din orice ţară care să nu aibă vre-o treabă cu 'serviciile'. Cred că massmedia, instituţiile me...
27/09/2014 @ 15:41:52
By Alterul EgoulMeu


Titolo




Publishes and comments on leaked documents alleging government and corporate misconduct.




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20/12/2014 @ 13.54.10
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