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Wednesday, January 04, 2012

What We Know So Far About the Successor to the B2 Stealth Bomber



Feature
Invisible warriors: the engineering breakthroughs that will make everything from planes to subs to soldiers...disappear



Beyond the B2 Nick Kaloterakis
The youngest active stealth bomber in the U.S. turns 15 this year, and the other 19 B2s in the Air Force fleet are nearly five years older. Meanwhile, the integrated defense systems they face have become much more sophisticated. Multi-static radar, which is now relatively common, is so sensitive that it can detect certain stealth craft. To stay ahead of such defense systems, the Air Force has budgeted $3.7 billion over the next five years to develop a successor to the B2 that could be active by 2020. Actual designs of the new bomber are classified, but some secrets are already out.
Patents and bid proposals from Northrop Grumman, maker of the B2, suggest that the new bomber will be narrower than the B2 but maintain the familiar flying wing design, which reduces radar reflection by minimizing hard edges. Engineers are also testing new types of radar-absorbing coatings that could be customized to individual defense systems. And so a picture of the next generation of stealth bombers is beginning to emerge.

CUSTOM COATINGS

Most stealth coatings consist of a radar-absorbing material, typically a form of iron, suspended in paint. But they are heavy (which lowers fuel efficiency), need to be reapplied frequently, and don’t absorb all radar frequencies. Ceno Technologies, a particles-science company in Sanborn, New York, has developed a lighter, more durable coating that uses hollow ceramic spheres, called cenospheres. Because the spheres can be covered in carbon, silver or other metals that absorb slightly different wavelengths of radar, the coating can be customized to deceive specific radar systems.

SMOOTHER SHAPE

The B2 has two semi-flush air-intake vents, the hard edges of which can reflect radar. In one design seen in a patent from Northrop Grumman, the new bomber has four small vents rather than two large ones. The smaller vents can be buried more deeply in the wing, reducing the possibility of radar returns.

SMARTER DECOYS

To confuse radar defense systems, the new bomber will probably carry something like the Miniature Air Launched Decoy made by Raytheon. The modified drones use radar reflectors to create bomber-like signatures that divert attention from the actual bomber. The decoys fly on a preprogrammed course for up to 575 miles and may carry radar jammers to further confuse air defenses.

RETRACTABLE WING

In one design from Northrop Grumman, engineers included a canard wing on the plane’s nose, which would provide extra lift during takeoff and flight, allowing a smaller bomber to carry a heavier weapons payload. Because its straight lines and hard angles would reflect radar, the canard wing will most likely be designed to fold flush with the bomber’s body as the craft comes within range of defense systems.

HEAVIER WEAPONS

The new bomber will most likely have a single weapons bay, as opposed to the twin bays on the B2. It will still be able to carry conventional GPS-guided JDAM missiles, nuclear warheads and even the new 30,000-pound, bunker-busting Massive Ordnance Penetrator, but a single bay would reduce the cost of manufacturing—a major concern for designers on a relatively tight budget.
Read more about the invisible warriors of the future: The engineering breakthroughs that will make everything from planes to subs to soldiers...disappear.

China Builds the World's Largest Battery, a Building-Sized, 36-Megawatt-Hour Behemoth






China's New World-Beating Battery Facility Business Wire via Cleantechnica
The largest battery in the world has arrived, and you likely won’t be surprised where it landed: Hebei Province, China. The State Grid Corporation of China (SGCC) and electric car maker BYD--the company that most recently made big headlines a few years back when Warren Buffett’s Berkshire Hathaway took a 10 percent stake--have teamed to create a massive battery arraycapable of storing 36 megawatt-hours of electricity.
That’s enough to power something like 12,000 homes for an hour during a total power failure, and enough for SGCC authorities to declare it the world’s largest energy storage device. The $500 million facility is constructed of arrays of BYD batteries “larger than a football field,” according to an SGCC press release, and they should increase the region’s renewable energy efficiency by up to 10 percent.
The array, located in Zhangbei, isn’t just a stand-alone battery. It is hooked into 140 megawatts of wind and solar power generation projects as well as a smart grid transmission system. Together, these elements represent China’s push toward a smart grid system that can generate renewable energy when conditions are ripe and store excess energy in its new battery array for use when energy generation troughs throughout the day.
The Deputy Director of China’s National Energy Administration is calling it the model for the future of Chinese renewable energy development, which means it will probably be the first such battery facility of many. That’s good for both China and BYD, which has been having a bit of trouble selling its electric cars both at home and abroad.
And it’s an intriguing test-bed for the rest of the world as well. There’s been a lot of chatter globally about using various kinds of energy storage devices to smooth the peaks and valleys inherent in wind and solar power generation so that we can rely more heavily upon them. Now that China’s gone and done something on a truly large scale, the rest of us have a real-world project to watch and learn from.

Monday, January 02, 2012

Scientists grow sperm in laboratory dish


Scientists grow sperm in laboratory dish

Scientists have made a major breakthrough that could soon see human sperm grown in the laboratory.

Sperm being prepared for IVF treatment
Sperm being prepared for IVF treatment Photo: Eddie Mulholland
The development opens up the possibility of infertile men being able to father their own children rather than using donor sperm.
Researchers in Germany and Israel were able to grow mouse sperm from a few cells in a laboratory dish.
In a world first a team headed by Professor Stefan Schlatt, at Muenster University in Germany, were able to grow sperm by using germ cells. These are the cells in testicles that are responsible for sperm production.
Scientists grew the sperm by surrounding the germ cells in a special compound called agar jelly to create an environment similar to that found in testicles.
Prof. Mahmoud Huleihel, who also grew the sperm at Israel's Ben Gurion University in Beersheba, said: "I believe it will eventually be possible to routinely grow human male sperm to order by extracting tissue containing germ cells from a man's testicle and stimulating sperm production in the laboratory."

You thought 2011 was tough?


You thought 2011 was tough?




NEW YORK | Sat Dec 31, 2011 12:33pm EST
(Reuters) - Shaky Europe. Political gridlock. Volatile markets.
Familiar themes for those who lived through 2011, and investors should be ready to revisit them next year.
With a spiraling debt crisis in Europe, political upheaval around the world, and crumbling creditworthiness in major industrial nations, 2011 was a tough year to know where to invest. 2012 is unlikely to offer much respite.
The S&P 500, a measure of the biggest U.S. companies' market value, spent much of the year getting pushed up and down, flummoxing shorts and longs - and scaring Moms and Pops away from stocks. It ended the year at 1,257.60, down a mere 0.04 of a point.
But the S&P 500's tepid performance was encouraging, compared with other world equity markets. The United States may still be seen as a safe haven, though even that looks uncertain.
For every rally built on improving economic figures this year, selloffs were never far away on worries the European debt crisis would eventually drag the continent into a recession and perhaps the United States as well. That could continue in 2012.
China and other fast-growing emerging markets can no longer be leaned on as those economies slow. In 2011's last half, the poorest-performing sectors outside of banks were most connected to global growth - materials, energy and industrial companies.
"There is a growing realization that the global economy is in jeopardy," said Bruce Bittles, chief investment strategist at Robert W. Baird & Co in Nashville. "There is uncertainty in every corner of the world."
That uncertainty fed substantial volatility in 2011. Despite the S&P's flat performance this year, there were 66 trading days when stocks moved in a 2 percent range. In 2008, when Lehman Brothers collapsed during a global financial crisis, there were more than 130 trading days when stocks swung that much. But that led to a flight from equities by retail investors.
U.S. equity funds had outflows in every month since May. More than $483 billion left U.S. mutual funds in 2011 through the year's second-to-last week, even though the U.S. market outperformed foreign stocks late in the game.
BEATING GLOBAL RIVALS
The S&P 500 ended the year off a scant 0.003 percent, the closest it has come to unchanged since 1947, according to Standard & Poor's. The Dow Jones industrial average .DJI finished 2011 with a 5.5 percent gain, while the Nasdaq Composite Index .IXIC slipped 1.8 percent.
In contrast, the MSCI world stocks index .MIWD00000PUS fell 9 percent, while the FTSEurofirst-300 index .FTEU3 slid nearly 11 percent.
The darlings in the emerging markets fared the worst. China's Shanghai Composite index .SSEClost 22 percent, India's BSE .BSESN sank 25 percent, and Brazil's Bovespa .BVSP dropped 18 percent.
Strategists say the U.S. stock market may benefit from reasonable economic growth and attractive market valuation. The S&P 500 is expected to rise 6 percent by the end of 2012, according to the most recent poll of Wall Street strategists.
<EPOLL/US>
When Wall Street gets back to work on Tuesday, it will face a holiday-shortened week and a slew of economic indicators. The most crucial numbers will come on Friday when the government will release the December non-farm payrolls report. Economists polled by Reuters expect a December gain of 150,000 jobs, compared with an increase of 120,000 jobs in November.
Volatility is likely to persist through early 2012 because of the uncertainty in Europe and rising concern about slowed earnings growth due to recent revisions.
The S&P 500's price-to-earnings ratio - what investors are willing to pay for a dollar of earnings - is under 12, below the 25-year average of 15. In weaker markets like Germany's DAX, the figure is below 9.
"We're building in a massive recession into these numbers," said Marc Pado, U.S. market strategist at Cantor Fitzgerald & Co. in San Francisco.
U.S. companies cutting earnings' outlooks recently outpaced those raising theirs by the greatest ratio in 10 years. Some sectors, such as materials, have seen a sharp drop in forecasts for the fourth quarter, Thomson Reuters data showed.
Last week, downbeat earnings from Oracle Corp (ORCL.O) shook confidence in the tech sector's health before the quarterly earnings season's start in January. Oracle joined a growing list of companies, including some of technology's biggest names, whose results and outlooks have set off alarm bells.
Next year, S&P 500 earnings are seen rising 9.9 percent, down from an estimate of 13 percent in October.
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Graphics: Global markets in 2011: Volatile and Unpredictable r.reuters.com/xut75s
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
RECESSION FEARS
Many economists believe the euro zone is already in recession. They forecast that the economies of the 17-nation bloc will stagnate in 2012 after contracting in this year's fourth quarter and the first quarter of the next.
Investors are worried that Italy and Spain will have to keep refinancing borrowings at unsustainable levels early next year, which could escalate the crisis.
The correlation between the U.S. stock market and the euro skyrocketed in 2011 as investors tied bets on risky assets to the euro's moves. That trend ebbed as equities rallied near the end of the year, but it is likely to flare up again.
So far the U.S. economy has stayed on course for moderate growth. Economists expect it to expand by about 2.1 percent next year. But it is unclear how a slowdown in the rest of the world will affect the economy stateside.
The key may be China rather than Europe.
"China is the 800-pound gorilla in the room and is probably the most important country to watch in terms of their contribution to global growth," said Michael Sheldon, chief market strategist at RDM Financial in Westport, Connecticut.
Chinese business confidence is weakening. A survey showed export orders fell for the first time in nearly three years.
The drop in materials shares in 2011's second half reflects worry about declining activity overseas. The S&P Materials Index .GSPM lost nearly 14 percent in the last six months.
GRIDLOCK SHOCK
One of the pivotal events of 2011 was the downgrade of the United States' perfect triple-A credit rating. Standard & Poor's cited congressional bickering as the reason for the downgrade.
August's stalemate in Washington over raising the debt ceiling sparked a selloff that accelerated after the downgrade.
Investors expect the gridlock in Congress to get worse as the U.S. presidential election approaches in November. The election is likely to be close, which will not make legislative efforts to tackle high debt levels and weak demand any easier.
Rancor was in view again in December as Congress struggled to pass a two-month extension of U.S. payroll-tax cuts.
"There will be less certainty about taxation and regulation so that will inhibit business formation and business growth," said Brian Battle, a trader at Performance Trust Capital Partners in Chicago.
Goldman Sachs sees global growth highly susceptible in 2012 to even minor shocks - and those shocks may be political.
"Slowing growth (and in places outright contraction), public-sector cuts, and a renegotiation of the social compact between state and society in different parts of the world is an environment ripe for political turmoil," Goldman said in a note to clients.
(Reporting By Edward Krudy; Editing by Jan Paschal)

Thursday, December 29, 2011

A chink in the armor of WPA/WPA2 WiFi security



A chink in the armor of WPA/WPA2 WiFi security

posted Dec 29th 2011 1:01pm by 
filed under: security hackswireless hacks
Looks like your WiFi might not be quite as secure as you thought it was. A paper recently published by [Stefan Viehböc] details a security flaw in the supposedly robust WPA/WPA2 WiFi security protocol. It’s not actually that protocol which is the culprit, but an in-built feature called Wi-Fi Protected Setup. This is an additional security protocol that allows you to easily setup network devices like printers without the need to give them the WPA passphrase. [Stephan's] proof-of-concept allows him to get the WPS pin in 4-10 hours using brute force. Once an attacker has that pin, they can immediately get the WPA passphrase with it. This works even if the passphrase is frequently changed.
Apparently, most WiFi access points not only offer WPS, but have it enabled by default. To further muck up the situation, some hardware settings dashboards offer a disable switch that doesn’t actually do anything!
It looks like [Stephan] wasn’t the only one working on this exploit. [Craig] wrote in to let us know he’s already released software to exploit the hole.

China push to put astronaut on the moon

China push to put astronaut on the moon




China push to put astronaut on the moon [Link]