Posts Tagged ‘surface’

How To Read A Smashed Hard Drive

Thursday, December 20th, 2012

Police and sovereign investigators are still acid for motives behind Adam Lanza’s murdering debauch in Newtown, Conn., final week. One critical block of evidence: Lanza’s mechanism tough drive, that investigators contend a 20-year-old crushed with a produce or screwdriver before a attack.

Presumably, Lanza wrecked his tough expostulate to forestall military from meddling into his files. But that might not have been adequate to keep his secrets. The F.B.I.’s computer-analysis response group is now operative to examine information off of a damaged drive.

Yes, physically destroying a tough expostulate renders your device and a information on it unusable. But with adequate proclivity and a right equipment—and a F.B.I. has both—some of your information can be recovered. Dan Kaminsky, arch scientist of confidence organisation DKH, says 100 percent earthy information drop is scarcely impossible. The customarily process that comes tighten is overwriting a disk. (Kaminsky is not concerned with a Newtown case.)

“Within a tough drive, there are several block feet of [read/write] surface, and any given record takes adult reduction than a block millimeter,” Kaminsky says. “That means even if a expostulate is dented or cracked into little pieces, a tangible aspect that contains a information is still there and readable.”

Kaminsky compares a cracked tough expostulate to a block of paper that is ripped apart. If all of a pieces are still there, we can “tape it behind together” and make out what was creatively created on it. To review a cracked drive, a hoop will need to be reassembled, that is a daunting though doable task.

“There aren’t many systems able of this turn of retreat engineering,” Kaminsky says. “Every manufacturer customizes a tough expostulate to store information differently. Information can be encoded in thousands of ways, tailored to a sold settlement that’s physically concordant to a singular aspect you’re essay to. To mislay a data, we would need to summon a pieces and retreat a manufacturer’s transformation.”

Investigators can brand a make and indication from a tough drive, and afterwards ask a exclusive sum from a manufacturer. “There’s a extensive volume of information about tough drives that’s common between forensics professionals and not a public,” Kaminsky says.

This kind of difficult replacement is really opposite than what pros would do to rescue information from a crashed drive. In that case, a drive’s review conduct has customarily stopped operative and a hoop has stopped spinning. Recovery engineers mislay a disk, that is stored on a platter, and put it on a larger, dedicated reader.

In a Newtown case, a earthy firmness of a platter itself is suspect. The astringency of repairs is not nonetheless known, though if investigators are propitious Lanza might have customarily used adequate force to stop a hoop from spinning, digest it wordless though customarily dented. Data on dented plates can be accessed most quicker than information on cracked drives.

The series of computers Lanza owned, and what he did on them besides play video games, is still unknown.

Article source: http://www.popularmechanics.com/technology/how-to/computer-security/how-to-read-a-smashed-hard-drive-14877558?click=pm_latest

Supporting sustainability by technology

Friday, December 14th, 2012

Written by Mark Jennings, Engineering Director during Dawson Shanahan

To examination a latest emanate of Manufacturing Digital, click here

Engineering businesses grow by contracting a latest technologies to strengthen and boost a potency of a prolongation process. Sustainability, that was once deliberate as an neglected vigour on business, is now assisting to revoke prolongation costs and urge earnings on investments by shortening rubbish and augmenting productivity. In some cases, technologies that revoke rubbish also pierce a acquire by-product of softened product quality.

One quite good instance of how softened prolongation techniques and environmental sustainability has dovetailed is in a record of cold forming – a holder of a partial from a blank. Cold combining is a fast, careful approach to furnish robust, formidable components in a far-reaching operation of materials. This routine is able of delivering pointing engineered tools with adult to 80 percent reduction throw than appurtenance processes, which, given a stream mercantile climate, is a statistic that ought to attract a courtesy of any member manufacturer.

Coupled with these reduced costs, cold combining indeed offers an event for manufacturers opposite attention to take advantage of extended member quality.

Cold forming creates for higher peculiarity products by plasticising metals along their pellet boundaries, rather than slicing across, so producing tools with intensely low levels of highlight deformation and high levels of automatic integrity, ensuing in distant larger opening and reliability. Furthermore, cold combining offers superb levels of definition, even on tools with formidable contours. Typically, dimensional tolerances can be to within and or reduction dual microns, with a combined advantage of intensely glorious aspect finishes, that in many cases, need no serve machining or polishing.

Additionally, tools bear work hardening during a cold combining process, improving their machinability and continuance still further. Work hardening dislocates a structure of a steel in a approach that prevents serve dislocations, ensuing in a stronger component. 

While a technique has prolonged been used with other modernized engineering metals such as copper, aluminium and brass, a fundamental strength of immaculate steel has been something of a stumbling retard for a cold combining process. For engineers today, there is now an choice to some-more compulsory processes regulating a protected cold combining technique grown by Dawson Shanahan.

This latest innovative growth now means that immaculate steel, as good as other outlandish metals such as titanium, can be cold shaped regulating a specialised lead lubrication and holder cloaking avoiding a need for dangerous chemical solutions. This singular bombard eliminates a problem of galling, to forestall repairs being caused to a components and tooling, that mostly presents itself in a form of scores or aspect imperfections, so progressing unchanging peculiarity in finished parts.

The advantages of this new routine will be of sold advantage to those areas of attention requiring robust, ultra-high pointing parts, such as industrial engines where a tools are used to boost altogether reliability, while slicing CO2 and particulate emissions. Cold combining also delivers poignant ecological advantages compared to processes such as prohibited forging, where a high turn of heat, and so energy, compulsory comes during a cost to a environment.  Consequently, cold combining can minister to a revoke CO footprint, as good as enhancing capability and business performance.

Another approach in that engineering manufacturers can broach sustainability and environmentally-friendly enhancements to their prolongation processes to broach a obliged products that business wish and need is by shortening a use of damaging components in a process.

Dawson Shanahan recently motionless to adopt an in abyss examination of cleaning solvents used to mislay liniment from a components. We asked one of a suppliers to perform a series of trials on opposite components regulating a accumulation of solvents and aspect cleanliness tests clearly showed that mutated ethanol was a many effective well-off for this purpose.

With a addition of trichloroethylene to Annex 14 of REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) in Feb 2013 as a Substance of Very High Concern (SVHC) a hunt for prolonged tenure non-static alternatives continues to accumulate pace. The attention trend is to pierce divided from regulating chlorinated hydrocarbons for steel degreasing and mutated alcohols offer an glorious substitute, significantly shortening well-off consumption.

With flourishing final for attention to revoke wastage rates and appetite expenditure for both mercantile and environmental reasons, an augmenting series of manufacturers are looking to adopt some-more fit and tolerable prolongation methods and for those engineering companies that are wakeful of, and open to, stream technologies there are some absolute options available.

About Dawson Shanahan:

With over 60 years experience, Dawson Shanahan Limited is a heading tellurian dilettante charity finish solutions in cold combining and machining of high precision, patron specified copper, aluminium, ferrous and fabricated components. The company’s products accommodate a final of a far-reaching operation of sectors including aerospace, automotive, electronics, laser, medical, packaging, plasma, energy distribution, telecoms and welding.

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Article source: http://www.manufacturingdigital.com/technology/supporting-sustainability-through-technology

Photonics: Graphene’s Flexible Future

Tuesday, December 11th, 2012

Dec. 10, 2012 — Theoretical calculations uncover graphene’s intensity for determining nanoscale light propagation on a chip.

Semiconductors have revolutionized computing since of their fit control over a upsurge of electrical currents on a singular chip, that has led to inclination such as a transistor. Working towards a identical tunable functionality for light, researchers from a A*STAR Institute of High Performance Computing (IHPC), Singapore, have shown how graphene could be used to control light during a nanometer scale, advancing a judgment of photonic circuits on chips1.

Graphene, that is done from a singular covering of CO atoms, has glorious electronic properties; some of these are also useful in photonic applications. Usually, usually metals are means to obstruct light to a sequence of a few nanometers, that is most smaller than a wavelength of a light. At a aspect of metals, common oscillations of electrons, supposed ‘surface plasmons’, act as absolute antennae that obstruct light to really tiny spaces. Graphene, with a high electrical conductivity, shows identical function to metals so can also be used for plasmon-based applications, explains Choon How Gan of IHPC, who led a research.

Gan and co-workers complicated theoretically and computationally how aspect plasmons transport along sheets of graphene. Even yet graphene is a poorer conductor than a metal, so plasmon propagation waste are higher, it has several pivotal advantages, says group member Hong Son Chu. “The pivotal advantage that creates graphene an glorious height for plasmonic inclination is a vast tunability that can't be seen in a common eminent metals,” he explains. “This tunability can be achieved in opposite ways, regulating electric or captivating fields, visual triggers and temperature.”

The team’s calculations indicated that aspect plasmons propagating along a piece of graphene would be most some-more cramped to a tiny space than they would roving along a bullion aspect (see image). However, a group also showed that aspect plasmons would transport distant improved between dual sheets of graphene brought into tighten contact. Furthermore, by adjusting pattern parameters such as a subdivision between a sheets, as good as their electrical conductivity, most improved control over aspect plasmon properties is possible.

In a future, Gan and his co-workers devise to examine these properties for applications. “We will try a intensity of graphene plasmonic inclination also for a terahertz and mid-infrared regime,” he explains. “In this bright range, graphene plasmonic structures could be earnest for applications such as molecular sensing, as photodetectors, or for visual inclination that can switch and allay light.”

The A*STAR-affiliated researchers contributing to this examine are from a Institute of High Performance Computing

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Story Source:

The above story is reprinted from materials supposing by The Agency for Science, Technology and Research (A*STAR).

Note: Materials might be edited for calm and length. For serve information, greatfully hit a source cited above.


Journal Reference:

  1. Choon How Gan, Hong Son Chu, Er Ping Li. Synthesis of rarely cramped aspect plasmon modes with doped graphene sheets in a midinfrared and terahertz frequencies. Physical Review B, 2012; 85 (12) DOI: 10.1103/PhysRevB.85.125431

Note: If no author is given, a source is cited instead.

Disclaimer: Views voiced in this essay do not indispensably simulate those of ScienceDaily or a staff.

Article source: http://www.sciencedaily.com/releases/2012/12/121210080425.htm

Life over Moore’s Law

Monday, November 19th, 2012

The Conversation

It’s early morning, you’re scheming for a day forward and meditative about life’s critical conundrums.

Is there adequate muesli left for a week? Do we have adequate time to locate a bus? Are we going to accommodate that appearing deadline during work? How are we going to continue improving electronic record over today’s generation?

OK, good maybe not that final one, though if we stop for a second and cruise about a daily conveniences we competence usually realize that problems such as this are already partial of a lives.

Let’s cruise smartphones. At a finish of a 1990s computers using Pentium II processors took adult your table and ran during about 50 per cent a computational speed of that phone.

In a early 1970s they filled a room, cost a happening and ran during roughly 0.02 per cent a mind energy of your Angry-Bird-launching, GPS-mapping, Facetime-ing companion.

The developments that have finished all of this probable have followed Moore’s Law, that simply means we’ve been means to double a volume of wiring on a same distance of chip space once each year and a half or so.

This has been finished by ceaselessly shrinking transistors, and formulating faster and some-more affordable technology.

So how most serve can we go?

As it turns out, we are already entrance a elemental boundary of scaling, and a (quantum) effects of electrons themselves are becoming some-more important in a pattern of tomorrow’s devices.

As semiconductor device magnitude shrink, so contingency a steel interconnects between a devices. It is within this new regime of steel wires usually a few hundreds of atoms opposite that a effects of separate steel junctions might infer to be most some-more critical than they formerly were.

Today we are not distant from this point, with the International Technology Roadmap for Semiconductors predicting a interconnecting line widths on semiconductor chips will be reduction than 16 nanometres (1nm = 10-9 m) within a subsequent decade.

To put that distance into perspective, 16nm is about 6.5 times a hole of DNA or 1/10,000 a hole of a normal tellurian hair.

In a new paper, scientists complicated how straightforwardly electrons upsurge from one form of steel to another during really tiny scales.

What a researchers found is surprising. As they finished a steel connection tiny adequate a electrical upsurge from tungsten to bullion (a common connection in CMOS technology – a form of integrated circuit) did not diminution linearly, though instead forsaken off dramatically.

This means a interconnect materials used in a entrance generations of small-scale wiring will need to be delicately selected to improved review their electronic structures.

The examine group – a partnership of physicists from McGill University in Canada and researchers during General Motors RD in a US – began by regulating a technique famous as Field Ion Microscopy (FIM) to emanate an accurate picture of a nanometer-scale tungsten tip they would use to hit a bullion surface.

Knowing a form of a tip, they afterwards pulpy or “nanoindented” a tip into a bullion surface. By characterising a softness of a surface, they could also establish a hit area.

The routine forms electrical junctions of reduction than 500 atoms, by that stream is afterwards passed.

The ensuing stream was found to be most reduction than expected for a area that it was flitting through.

To benefit discernment into a underlying means of this decrease, a group afterwards incited to molecular dynamics simulations. Using these simulations they combined an atomic indication of a tip to review to a initial FIM picture and examine a era of atomic stacking faults (an abnormality in a arrangement of atoms) in a bullion aspect caused by a tip’s contact.

With believe of a tip’s form in hand, a group incited to state-of-the-art quantum ride characteristics to investigate how electrons transport by a gold-tungsten interface during a atomic level.

The junction’s conductance firmness – a magnitude of electrical conductivity per section area – was found to be 4 times reduce than a conductance firmness of possibly bullion or tungsten on their own.

This startling diminution is explained by a orbital mismatch between tungsten (where giveaway electrons circuit in a d-orbital) and bullion (an s-orbital metal) in systems during amply small-length scales. (Simply put, orbitals impute to a likely plcae of an atom’s electrons in circuit around a nucleus).

Orbital mismatch of metals has so distant not been a problem in a incomparable junctions of required CMOS technology.

As mentioned, a team’s anticipating indicates clever care of interconnect materials will be required as semiconductor inclination are shrunk further.

As we approach ballistic scales – where a magnitude of a steel wires turn allied to the wavelength of electrons– device insurgency to electrical upsurge will be dominated by junctions of metals with separate electronic structures.

So tomorrow morning when you’re deliberation life’s small conundrums, cruise for a impulse about a wiring we take for postulated and a researchers who are operative tirelessly in this area.

Adam Burke is a comparison examine associate, Nanoelectronics Group during University of New South Wales. This essay was initial published on The Conversation on Nov 19. Republished with permission.

Article source: http://www.technologyspectator.com.au/life-beyond-moores-law

The almighty girl of asteroid Vesta

Sunday, November 4th, 2012

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Technology

Date

Nov 5, 2012 – 9:59AM


This undated artist judgment expelled by NASA and a Jet Propulsion Laboratory shows a Dawn booster with Ceres and Vesta seen in a background. The booster was prisoner into circuit around a large asteroid Vesta after a 1.7 billion-mile tour and is scheming to start a investigate of a aspect that competence date to a beginning epoch of a solar system, a space group pronounced Monday, Jul 18, 2011, in Pasadena, Calif. (AP Photo/William K. Hartmann/UCLA/NASA, JET PROPULSION LABORATORY)

An artist’s sense expelled by NASA display a Dawn booster with Ceres and Vesta in a background. Photo: HOPD

Solar complement bodies defenceless by even a bit of atmosphere fundamentally age — except, apparently, for a asteroid Vesta. Other airless bodies, including a moon, tumble chase to blasts of vast dirt and charged particles in a sun’s wind. But noticed from Earth, 550-kilometre-diameter Vesta seemed defence to all that.

This week, researchers analysing splendid colour information returned by a Dawn booster can endorse that Vesta has mysteriously transient eons of a kind of “space weathering” that has aged a aspect of other asteroids. And Dawn’s splendid observations are also display how a obvious “gardening” routine on asteroids is smoothing out Vesta’s age spots.

In tighten circuit around Vesta given Jul 2011, Dawn got a closest demeanour ever during Vesta’s aspect before it left circuit in Sep to conduct for a second target, asteroid Ceres. But heavenly spectroscopist Carle Pieters of Brown University and her colleagues news this week in Nature that even Dawn’s up-close investigation suggested no pointer of space weathering’s classical signature — an altogether extinguishing and an inaudible splendid change toward a redder colour.

A 3D picture of asteroid Vesta's Equatorial Region is see in this Aug 11, 2011 handout. The anaglyph picture of Vesta's equator was put together from dual transparent filter images, taken on Jul 24, 2011 by a framing camera instrument aboard NASA's Dawn spacecraft. The picture shows hills, troughs, ridges and high craters. The framing cameras were grown and built underneath a care of a Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, with poignant contributions by a German Aerospace Center (DLR) Institute of Planetary Research, Berlin, and in coordination with a Institute of Computer and Communication Network Engineering,Braunschweig. REUTERS/NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/Handout (Tags: - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS

A 3D picture of asteroid Vesta, taken by a Dawn spacecraft. Photo: HO

Microscopic hearing of lunar stone and meteorites from other asteroids had shown that this arrange of space weathering formula from nanometre-size blobs of lead iron — called nanophase iron — cloaking grains of rock. Nanophase iron forms when impacting pieces of asteroidal dust, solar breeze charged particles, or both, vaporize iron firm in minerals. The iron effluvium afterwards deposits itself as lead blobs on a nearest surface.

But even with a new Dawn data, because Vesta is defence to space weathering stays a mystery. Roger Fu of a Massachusetts Institute of Technology in Cambridge and his colleagues have suggested a resolution is a Vestan captivating field. They recently found signs of a captivating margin in a meteorite that had been bloody off Vesta. In their paper in a Oct emanate of Science, they argued that this suggests a whole membrane of Vesta still carries a captivating margin that could have fended off a charged particles of a solar breeze all these eons. Small froth of captivating margin do seem to consult such a protecting outcome in tiny regions on a moon, withdrawal lighter-toned “swirls” on a differently darkened, weathered lunar surface.

Planetary scientist Lindsay Keller of NASA’s Johnson Space Centre in Houston, Texas, has another idea. “If we were going to place income on this,” he says, “I’d contend it’s a compositional effect.” Vesta’s crustal stone contains many reduction iron than does lunar rock, he explains. So a solar breeze competence not be means to vaporize adequate iron to make many lead blobs.

Researchers could shortly endorse during slightest one arrange of insurance opposite a aging effects of space weathering. Keller and others are now space weathering a accumulation of rocks in a laboratory to arrange out compositional effects. Testing a captivating margin thought will be tougher. Dawn was scheduled to lift a magnetometer to magnitude any captivating fields around Vesta and Ceres, though cost overruns forced a Dawn group to dump a instrument from their final design.

Dawn information did solve another Vesta mystery. Impacts on a asteroid have splashed lighter stone out of a centre of their craters over a rims to form bright, radiating “rays” of ejecta. On a moon, space weathering solemnly darkens such splendid rays, eventually erasing them. But on unweathered Vesta, a same sorts of blemishes disappear though space weathering.

Again sketch on Dawn splendid data, Pieters and colleagues interpretation that a solid sleet of asteroidal waste descending on Vesta splatters waste opposite a aspect and churns a hilly “soil” covering a surface. This “gardening” outcome regularly mixes brighter ray component into a rest of a soil, causing a rays to vanish. So not usually does Vesta conflict a aging effects of space weathering, though a pummelling it contingency take over time also heals a discolouration that comes with age.

ScienceNOW


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Article source: http://www.theage.com.au/technology/sci-tech/the-eternal-youth-of-asteroid-vesta-20121102-28ny6.html

Necessity is a mom of these inventions

Saturday, October 27th, 2012

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Technology


Dr Philip Bell

Fuelled … Dr Philip Bell, a executive and conduct of investigate in a Microbiogen genetics laboratory, prepares samples.

STEER-BY-WIRE

Within a subsequent year, Japanese automobile builder Nissan will deliver subsequent era steering record into some of a cars that does divided with a automatic shelve and sail set up. In a new system, famous as steer-by-wire, sensors detect when a motorist turns a wheel, promulgation electrical signals to a tyres so they respond faster and with some-more accuracy. A camera mounted on a car’s rear-view counterpart will consider a highway forward and detect changes in a car’s direction. In required steering system, a automobile turns around a automatic tie between a steering circle and a tyres.

SOLAR PAINT

Steer-by-wire invention

Steer-by-wire invention.

Imagine if any outside aspect of your residence or bureau building could beget electricity. That could shortly be a existence interjection to a group during a University of Newcastle who have invented a solar paint. The water-based lacquer contains small cosmetic particles – smaller than a hole of a tellurian hair – that catch object to furnish electricity. The plan leader, Paul Dastoor, says a ultimate idea is a paint that can be practical directly to a roof or wall, though early versions will paint a component on cosmetic sheets, that enclose electrical wires to broadcast a electricity, that can be rolled out. The solar paint could beget electricity during half today’s electricity prices.

MICROBIOGEN

A new aria of leavening and a immature partial of sugarine shaft could change tellurian fuel production. A span of Australian brothers have grown a absolute leavening that can modify rubbish biomass such as sugarine shaft byproducts into ethanol. More than 80 billion litres of ethanol is constructed from succulent crops such as corn any year. Next era biofuels aim to revoke a faith on food crops, though scientists have struggled to furnish ethanol from a woody, immature partial of plants. Geoff and Phil Bell’s high-quality yeast, that has perceived appropriation from a United States and Australian governments, has overcome this problem. The span wish to spin a initial sod during a Microbiogen plant in dual to 3 years.

BRANDTABLE

Within a few months, backing adult to sequence lunch in a swarming food justice could shortly be over. A Sydney businessman has grown a smartphone focus that allows users to sequence food directly from their phone. Brandtable takes advantage of near-field communication chips, found in all new smartphones (bar iPhones), that can sell information with other circuitously NFC chips. The record is already used by credit label companies for contactless transactions. By swiping a smartphone over a Brandtable trademark a user can place a food sequence directly with a restaurant.

LIQUIGLIDE

How many times have we bashed a tomato salsa bottle opposite a dais to force a final dollop onto your plate? Scientists during Massachusetts Institute of Technology in a US have invented a solution, an ultra-thin component that coats a inside aspect of a bottle and allows gluggy liquids like tomato salsa and shampoo to slip right out. The sleazy material, called LiquiGlide, is plant based. The team, led by operative Kripa Varanasi, wish a material, that can cloak glass, plastic, steel and ceramic, will be on a marketplace within 3 years.


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Article source: http://www.theage.com.au/technology/sci-tech/necessity-is-the-mother-of-these-inventions-20121027-28cba.html

NREL nano-technology solar dungeon achieves 18.2% efficiency

Friday, October 12th, 2012

NREL nano-technology solar dungeon achieves 18.2% efficiency

12. Oct 2012 | By:  NREL

Breakthrough should discharge need for anti-reflection layer, slicing costs.

Scientists during a U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) have constructed solar cells regulating nanotechnology techniques during an potency – 18.2% — that is competitive. The breakthrough should be a vital step toward assisting revoke a cost of solar energy.

NREL tailored a nanostructured aspect while ensuring that a light-generated electricity can still be collected well from a solar cell. The researchers done nano-islands of china on a silicon wafer and enthralled it quickly in liquids to make billions of nano-sized holes in any square-inch of a silicon wafer surface. The holes and silicon walls are smaller than a light wavelengths attack them, so a light doesn’t commend any remarkable change in firmness during a aspect and, thus, don’t simulate behind into a atmosphere as squandered energy.

The researchers tranquil a nanoshapes and a chemical multiple of a aspect to strech record solar dungeon efficiencies for this ‘black silicon’ material.

The paper, “An 18.2%-efficient black-silicon solar dungeon achieved by control of conduit recombination in nanostructures” by NREL’s Jihun Oh, Hao-Chih Yuan, and Howard Branz, now appears on Nature Nanotechnology’s website.

Typically, solar dungeon manufacturers contingency supplement an additional anti-reflection layer, or two, to their cells, that boosts costs significantly.

NREL formerly had demonstrated that their nanostructures reflected reduction light than a best anti-reflection layers of a solar cell. But until now, they hadn’t been means to grasp altogether potency with their black silicon cells that could proceed a best outlines for other silicon cells.

Oh, Yuan, and Branz, initial had to establish because a increasing aspect area of a nanostructures dramatically reduced a collection of electricity and harm a voltage and stream of a cells.

Their experiments demonstrated that a high-surface area, and generally a routine called Auger recombination, extent a collection of photons on many nanostructured solar cells. They resolved that this Auger recombination is caused when too many of a dopant impurities put in to make a dungeon work come by a nanostructured surface.

This systematic bargain enabled them to conceal Auger recombination with lighter and shallower doping. Combining this lighter doping with somewhat smoother nanoshapes, they can build an 18.2%-efficient solar dungeon that is black though responds scarcely ideally to roughly a whole solar spectrum.

The Energy Department saved a investigate extend by a American Recovery and Reinvestment Act.

Branz, a grant’s principal investigator, said, “This work can have a large impact on both required and rising solar dungeon formed on nanowires and nanospheres. For a initial time it shows that unequivocally good solar cells can be done from nanostructured semiconductors.”

Branz added, “The subsequent hurdles are to interpret these formula to common industrial use and afterwards get a potency over 20%. After that, we wish to see these kinds of nanostructuring techniques used on distant thinner cells to use reduction semiconductor material.”

“Now we have a transparent investigate that shows how optimizing a aspect area and a doping together can give improved efficiency,” Yuan said. “The aspect area and a doping thoroughness nearby a aspect impact nano-structured solar-cell performance.”

First author, Oh, an NREL Postdoctoral Fellow pronounced a NREL investigate “clearly shows that a right multiple of a delicately nano-structured aspect and good estimate can revoke a cost while slicing neglected thoughtfulness of sunlight.”

NREL is a U.S. Department of Energy’s primary inhabitant laboratory for renewable appetite and appetite potency investigate and development. NREL is operated for DOE by a Alliance for Sustainable Energy, LLC.

Article source: http://www.pv-magazine.com/services/press-releases/details/beitrag/nrel-nano-technology-solar-cell-achieves-182-efficiency_100008833/

Astrobotic Technology Inc. reveals lunar prospecting robot

Wednesday, October 10th, 2012

Astrobotic Technology Inc., a spin-off of Carnegie Mellon University, has denounced a antecedent lunar prospecting drudge called Polaris. Specifically done to hunt out water, Polaris will be versed with a cavalcade that allows it to gimlet a small over 3-feet into a moon’s surface, and will have a ability to work in areas lonesome with vast shadows. Polaris is a initial of a kind.

Specifically, Polaris is designed to cavalcade in hunt of lunar ice. Although other prospecting robots have been grown with a capability to cavalcade by a moon’s surface, nothing of them were ever done with a vigilant to be shipped into space. Polaris, on a other hand, is unfailing for a stars, and will concede scientist to try a moon’s aspect with precision.

Polaris measures in during 8 feet long, 7 feet wide, and 5.5 feet tall, with a weight of approximately 330lbs and a ability to ride adult to about 150lbs of equipment, such as drills. Unlike past robots, Polaris is designed to work in areas where a object is attack a belligerent during low, oppressive angles interjection to a array of delicately positioned solar panels, that will beget about 250 watts of electricity.

Perhaps many extraordinary of all is that Polaris’s position will be accurate adult to 10 feet. Scientists will spend a subsequent several months contrast and fine-tuning a robot, and once it is ready, Polaris will be sent into space around a SpaceX Falcon 9. Basically, Polaris is a Neil Armstrong of lunar ice-prospecting robots.

[via Carnegie Mellon]

Article source: http://www.slashgear.com/astrobotic-technology-inc-reveals-lunar-prospecting-robot-10251171/

Boiling H2O but froth – domain

Saturday, October 6th, 2012

Every prepare knows that prohibited H2O bubbles, right? New investigate from Northwestern University turns that idea on a head.

”We manipulated what has been famous for a long, prolonged time by regulating a right kind of hardness and chemistry to forestall effervescent during boiling,” pronounced Neelesh A. Patankar, highbrow of automatic engineering during Northwestern’s McCormick School of Engineering and Applied Science and co-author of a study.

This find could assistance revoke repairs to surfaces, forestall effervescent explosions and might someday be used to raise feverishness send equipment, revoke drag on ships and lead to anti-frost technologies.

Published final month in a biography Nature, a investigate outlines how a specifically engineered coated aspect can emanate a fast effluvium pillow between a aspect and a prohibited glass and discharge a froth that are combined during boiling.

This materialisation is formed on a Leidenfrost effect. In 1756 a German scientist Johann Leidenfrost celebrated that H2O drops skittered on a amply prohibited skillet, bouncing opposite a aspect of a skillet on a effluvium pillow or film of steam. The effluvium film collapses as a aspect falls next a Leidenfrost temperature. When a H2O drop hits a aspect of a skillet, during 100 degrees Celsius, prohibited temperature, it bubbles.

To brace a Leidenfrost effluvium film and forestall effervescent during boiling, Patankar collaborated with Ivan U Vakarelski of King Abdullah University of Science and Technology, Saudi Arabia.


Article source: http://www.domain-b.com/technology/20121006_bubbles.html

MEYER BURGER TECHNOLOGY AG : Significant potency boost for PERC … – 4

Monday, September 17th, 2012

Meyer Burger (SIX Swiss Exchange: MBTN) Group member Roth
Rau AG (Frankfurt Exchange: R8R) and InnoLas Systems GmbH
have commissioned upgraded PECVD systems and lasers for PERC
(Passivated Emitter and Rear Cell) solar cells during several
customers, thereby significantly augmenting a efficiency
of customary mono-crystalline cells by adult to one percentage
point. The process, including both upstream and downstream
routine steps, was grown by Roth Rau and InnoLas in
tighten team-work with finish business and accurate in
using prolongation lines.

InnoLas Managing Director Richard Grundmüller: “It is
essential that we achieved this increasing potency in
industrial prolongation lines and not usually underneath laboratory
conditions. In new months, a record has proven
itself to be really strong and can now be integrated into
existent prolongation lines.”

A Roth Rau MAiA PECVD complement has been used for rear
aspect passivation with aluminium oxide and silicon
nitride, and an InnoLas Systems ILS TT for laser contact
opening. This multiple of systems achieved line
throughputs of adult to 3,400 wafers per hour that meets the
throughput mandate of ultra-modern industrial mass
prolongation of solar cells. The aloft potency represents
a poignant rival advantage for dungeon manufacturers.

Roth Rau Head of Sales Thomas Hengst: “We have integrated
a dual cloaking processes compulsory for back surface
passivation into a attempted and tested SiNA/MAiA platform.
The modular pattern ensures best routine coherence and
throughput variability, enabling a configurations to be
simply blending to existent mandate and doing costs
to be cut further. The focus of a AlOx and SiN cap
layers increases routine reserve while progressing the
vacuum. Moreover, this eliminates a need for additional
handling, giving a analogous boost to a yield. Both
Roth Rau and InnoLas possess extensive expertise in
a doing of fast and fit best-in-class
technologies.”

The altogether record grown by Roth Rau and InnoLas
Systems is also designed to be simply integrated into
existent prolongation lines as good that so extends the
innovative complement portfolio in photovoltaic technology
offering by a Meyer Burger Group. Several installations
incorporating this record are now in preparation
for heading manufacturers.

Additional information:

Roth Rau AG
Mario Schubert
Tel: +49 3723 671 3340
Email: mario.schubert@roth-rau.com

InnoLas Systems GmbH
Tel: +49 89 899 4828 0
Email: info@innolas-systems.com

Article source: http://www.4-traders.com/MEYER-BURGER-TECHNOLOGY-A-197089/news/Meyer-Burger-Technology-AG-Significant-efficiency-increase-for-PERC-cells-15200330/