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D-Wave, NASA and Google: Launch of the Quantum Artificial Intelligence Lab

D-Wave, NASA and Google: Launch of the Quantum Artificial Intelligence Lab | Amazing Science | Scoop.it

We believe quantum computing may help solve some of the most challenging computer science problems, particularly in machine learning. Machine learning is all about building better models of the world to make more accurate predictions. If we want to cure diseases, we need better models of how they develop. If we want to create effective environmental policies, we need better models of what’s happening to our climate. And if we want to build a more useful search engine, we need to better understand spoken questions and what’s on the web so you get the best answer.

So today we’re launching the Quantum Artificial Intelligence Lab. NASA’s Ames Research Center will host the lab, which will house a quantum computer from D-Wave Systems, and the USRA (Universities Space Research Association) will invite researchers from around the world to share time on it. Our goal: to study how quantum computing might advance machine learning.

Machine learning is highly difficult. It’s what mathematicians call an “NP-hard” problem. That’s because building a good model is really a creative act. As an analogy, consider what it takes to architect a house. You’re balancing lots of constraints -- budget, usage requirements, space limitations, etc. -- but still trying to create the most beautiful house you can. A creative architect will find a great solution. Mathematically speaking the architect is solving an optimization problem and creativity can be thought of as the ability to come up with a good solution given an objective and constraints. 

Classical computers aren’t well suited to these types of creative problems. Solving such problems can be imagined as trying to find the lowest point on a surface covered in hills and valleys. Classical computing might use what’s called “gradient descent”: start at a random spot on the surface, look around for a lower spot to walk down to, and repeat until you can’t walk downhill anymore. But all too often that gets you stuck in a “local minimum” -- a valley that isn’t the very lowest point on the surface.

That’s where quantum computing comes in. It lets you cheat a little, giving you some chance to “tunnel” through a ridge to see if there’s a lower valley hidden beyond it. This gives you a much better shot at finding the true lowest point -- the optimal solution.

We’ve already developed some quantum machine learning algorithms. One produces very compact, efficient recognizers -- very useful when you’re short on power, as on a mobile device. Another can handle highly polluted training data, where a high percentage of the examples are mislabeled, as they often are in the real world. And we’ve learned some useful principles: e.g., you get the best results not with pure quantum computing, but by mixing quantum and classical computing.

Can we move these ideas from theory to practice, building real solutions on quantum hardware? Answering this question is what the Quantum Artificial Intelligence Lab is for. We hope it helps researchers construct more efficient and more accurate models for everything from speech recognition, to web search, to protein folding. We actually think quantum machine learning may provide the most creative problem-solving process under the known laws of physics. We’re excited to get started with NASA Ames, D-Wave, the USRA, and scientists from around the world.

 

http://www.youtube.com/watch?v=6VIAL8gQRTI

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AT13148 - A Novel Oral Multi-AGC Kinase Inhibitor Has Potent Antitumor Activity

AT13148 - A Novel Oral Multi-AGC Kinase Inhibitor Has Potent Antitumor Activity | Amazing Science | Scoop.it

Deregulated phosphatidylinositol 3-kinase pathway signaling through AGC kinases including AKT, p70S6 kinase, PKA, SGK and Rho kinase is a key driver of multiple cancers. The simultaneous inhibition of multiple AGC kinases may increase antitumor activity and minimize clinical resistance compared with a single pathway component.

 

A research team from the UK investigated the detailed pharmacology and antitumor activity of the novel clinical drug candidate AT13148, an oral ATP-competitive multi-AGC kinase inhibitor. Gene expression microarray studies were undertaken to characterize the molecular mechanisms of action of AT13148.

 

Their results show that AT13148 caused a substantial blockade of AKT, p70S6K, PKA, ROCK, and SGK substrate phosphorylation and induced apoptosis in a concentration and time-dependent manner in cancer cells with clinically relevant genetic defects in vitro and in vivo. Antitumor efficacy in HER2-positive, PIK3CA-mutant BT474 breast, PTEN-deficient PC3 human prostate cancer, and PTEN-deficient MES-SA uterine tumor xenografts was shown. These experiments demonstrate for the first time that induction of AKT phosphorylation at serine 473 by AT13148, as reported for other ATP-competitive inhibitors of AKT, is not the therapeutically relevant reactivation step. Gene expression studies showed that AT13148 has a predominant effect on apoptosis genes, whereas the selective AKT inhibitor CCT128930 modulates cell-cycle genes. Induction of upstream regulators including IRS2 and PIK3IP1 as a result of compensatory feedback loops was observed.


Thus, the clinical candidate AT13148 is a novel oral multi-AGC kinase inhibitor with potent pharmacodynamic and antitumor activity, which shows a distinct mechanism of action from other AKT inhibitors. AT13148 will now be assessed in a first-in-human phase I trial.

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'Artificial leaf' gains the ability to self-heal damage and produce energy from dirty water

'Artificial leaf' gains the ability to self-heal damage and produce energy from dirty water | Amazing Science | Scoop.it

Another innovative feature has been added to the world's first practical "artificial leaf," making the device even more suitable for providing people in developing countries and remote areas with electricity, scientists reported in New Orleans on April 8. It gives the leaf the ability to self-heal damage that occurs during production of energy. Daniel G. Nocera, Ph.D., described the advance during the "Kavli Foundation Innovations in Chemistry Lecture" at the 245th National Meeting & Exposition of the American Chemical Society.

 

Nocera, leader of the research team, explained that the "leaf" mimics the ability of real leaves to produce energy from sunlight and water. The device, however, actually is a simple catalyst-coated wafer of silicon, rather than a complicated reproduction of the photosynthesis mechanism in real leaves. Dropped into a jar of water and exposed to sunlight, catalysts in the device break water down into its components, hydrogen and oxygen. Those gases bubble up and can be collected and used as fuel to produce electricity in fuel cells.

 

"Surprisingly, some of the catalysts we've developed for use in the artificial leaf device actually heal themselves," Nocera said. "They are a kind of 'living catalyst.' This is an important innovation that eases one of the concerns about initial use of the leaf in developing countries and other remote areas."

 

Nocera, who is the Patterson Rockwood Professor of Energy at Harvard University, explained that the artificial leaf likely would find its first uses in providing "personalized" electricity to individual homes in areas that lack traditional electric power generating stations and electric transmission lines. Less than one quart of drinking water, for instance, would be enough to provide about 100 watts of electricity 24 hours a day. Earlier versions of the leaf required pure water, because bacteria eventually formed biofilms on the leaf's surface, shutting down production.

 

"Self-healing enables the artificial leaf to run on the impure, bacteria-contaminated water found in nature," Nocera said. "We figured out a way to tweak the conditions so that part of the catalyst falls apart, denying bacteria the smooth surface needed to form a biofilm. Then the catalyst can heal and re-assemble."

 

Nocera said that about 3 billion people today live in areas that lack access to traditional electric production and distribution systems. That population will grow by billions in the decades ahead. About 1 billion people in the developing world already lack reliable access to clean water. Thus, a clear need exists for a simple device like the artificial leaf that's compatible with local conditions.

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CineversityTV's curator insight, May 18, 2013 1:53 PM

but what will it mean to Nature, disruption of more ecosystems?

David Gifford's curator insight, July 23, 2013 11:17 PM

The science daily article is very helpful

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DNA printing of living things: Synthesize DNA 10,000 cheaper than currently possible

Problem: Synthetic biology has the potential to create new organisms that could do an infinite number of things. But the cost of synthesizing DNA is currently prohibitively expensive. 

Solution: Austen has developed a new technique to synthesize DNA 10,000 times cheaper than existing technology. 

Technology: One of the big challenges with DNA synthesis is error correction during fabrication, fabricating the correct sequence of A, T, G and Cs. Austen solves this problem by fabricating billions of strands at once, quickly (and cheaply) optically sequencing them and then selecting the correct DNA sequences using a fast moving laser.

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Ahmed Atef's comment, May 22, 2013 1:40 PM
they will
Miro Svetlik's comment, May 23, 2013 3:00 AM
Hello Ahmed, I certainly believe you and I am really curious how it will change our society.
Ahmed Atef's comment, August 15, 2013 8:51 AM
Hello Miro for now you can decode any genome for just two days assembling any genome is the only limitation because the price if you can make dna printer like this that mean during one year your backyard will be filled bye home designed organisms
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ECOSPHERE: Social media meets 3D digital art

WELCOME TO THE ECOSPHERE.


A real-time view of the global climate change discussion around the COP17 Conference.

Every tweet tagged with hashtag #COP17 will stimulate growth in a plant or tree in the ECOPSHERE that represents a certain topic (e.g. Sustainability). In this constantly evolving environment users are able to see the discussion develop as people talk on Twitter - a real-time visualisation of the global conversation.

The-state-of-the art ECOSPHERE microsite was produced by STINK DIGITAL LONDON/NEW YORK and developed and designed by MINIVEGAS Amsterdam/Los Angeles.

MINIVEGAS has developed a real-time infographic of sorts, treating the viewer to a stunning visual representation of the evolving global discussion. A lush 3D environment that allows the viewer to explore, view content up close or zoom out to observe the visualisation as a whole. At the core of the experience is a digital growth algorithm is based on actual organic growth in the plant world -- plants and trees grow organically with every #COP17 tweet and topics compete for space and light on the sphere.

The ECOSPHERE constantly listens to the global conversation on Twitter -- every new tweet tagged with hashtag #COP17 is brought into the environment, scanned for keywords and then grouped with similar contributions, connecting input from around the world - building conversations in a fascinating evolving environment.

CNN COVERAGE
CNN International will also use the ECOSPHERE Project in its live reporting about the summit. CNN correspondents Robyn Curnow and Diana Magnay will report and comment on events in and around the meeting, exploring what effect the decisions taken in Durban will have on the world, on business and on every individual person on the planet.

In addition, the ECOSPHERE Project will also be part of the December edition of "Road to Durban: A Green City Journey". In the months approaching the summit, CNN made the journey to Durban starting in the UK and travelling across Germany and Turkey reporting on local climate protection projects. In December "Road to Durban: A Green City Journey" will be dedicated to the themes of the 17th World Climate Summit. For more information please go to www.cnn.com/roadtodurban.

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Emerging Technologies: Touchable Holography

Recently, mid-air displays are attracting a lot of attention in the fields of digital signage and home TV, and many types of holographic displays have been proposed and developed. Although we can "see" holograhpic images as if they are really floating in front of us, we cannot "touch" them, because they are nothing but light. This project adds tactile feedback to the hovering image in 3D free space. Tactile sensation requires contact with objects, but including a stimulator in the work space dilutes the appearance of holographic images. The Airborne Ultrasound Tactile Display solves this problem by producing tactile sensation on a user's hand without any direct contact and without diluting the quality of the holographic projection.
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Secret of efficient photosynthesis in purple bacteria is decoded

Secret of efficient photosynthesis in purple bacteria is decoded | Amazing Science | Scoop.it
MIT researchers find that the key to purple bacteria’s light-harvesting prowess lies in highly symmetrical molecules.

 

Purple bacteria are among Earth’s oldest organisms, and among its most efficient in turning sunlight into usable chemical energy. Now, a key to their light-harvesting prowess has been explained through a detailed structural analysis by scientists at MIT.

A ring-shaped molecule with an unusual ninefold symmetry is critical, the researchers found. The circular symmetry accounts for its efficiency in converting sunlight, and for its mechanical durability and strength. The new analysis, carried out by professors of chemistry Jianshu Cao and the late Robert Silbey, postdoc Liam Cleary, and graduate students Hang Chen and Chern Chuang, has been published in Proceedings of the National Academy of Sciences.

“The symmetry makes the energy transfer much more robust,” Cao says. “Most biological systems are quite soft and disordered. You would not expect a regular structure, almost a perfect structure,” as is found in this primitive microbe, he says.

In these regular round complexes, Cao says, “nature only used certain symmetry numbers: mostly ninefold, some eightfold, very few tenfold. It’s very selective.” His group’s mathematical analysis shows there are good reasons for that, he says.

These ring-shaped molecules, in turn, are arranged in a hexagonal pattern on the spherical photosynthetic membrane of purple bacteria, Cao says. 

“With these symmetry numbers, the interactions between all pairs of the symmetric rings are optimized at the same time. … We believe that nature found the most robust structures in terms of energy transfer,” Cao says. Both eightfold and tenfold symmetries also work, though not as well: Only a lattice made up of ninefold symmetric complexes can tolerate an error in either direction. “You want consecutive numbers so it can tolerate such mistakes,” Cao says.

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Discovery of new hormone opens doors to new type 2 diabetes treatments

Discovery of new hormone opens doors to new type 2 diabetes treatments | Amazing Science | Scoop.it
Researchers have discovered that a particular type of protein (hormone) found in fat cells helps regulate how glucose (blood sugar) is controlled and metabolized in the liver.

 

Harvard School of Public Health (HSPH) researchers have discovered that a particular type of protein (hormone) found in fat cells helps regulate how glucose (blood sugar) is controlled and metabolized (used for energy) in the liver. Using experimental models and state-of-the-art technology, the scientists found that switching off this protein leads to better control of glucose production from the liver, revealing a potential new target that may be used to treat type 2 diabetes and other metabolic diseases.

The study appears online in the May 7, 2013 issue of Cell Metabolism.

"Although it has long been recognized that a key event leading to development of type 2 diabetes is uncontrolled glucose production from the liver, underlying mechanisms have been elusive," said senior author Gökhan S. Hotamisligil, chair of the Department of Genetics and Complex Diseases and J.S. Simmons Professor of Genetics and Metabolism at HSPH. "We now have identified aP2 as a novel hormone released from fat cells that controls this critical function."

 

The ability of one organ -- in this case, the adipose tissue -- to so directly and profoundly control the actions of another -- the liver -- is in itself very exciting, said Hotamisligil. "We suspect this communication system between adipose tissue and liver may have evolved to help fat cells command the liver to supply the body with glucose in times of nutrient deprivation. However, when the engorged fat cells lose control over this signal in obesity, the blood levels of aP2 rise, glucose is poured into the bloodstream and cannot be cleared by other tissues. The result is high blood glucose levels and type 2 diabetes."

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Solar Flares Pack the Power of Millions of H-Bombs

Solar Flares Pack the Power of Millions of H-Bombs | Amazing Science | Scoop.it

Exploding from the Sun’s surface with energy equivalent to millions of 100-megaton hydrogen bombs, the flare spewed intense radiation into space. It was not directed toward Earth, but NASA says solar material from all three of the recent flares will pass by the Spitzer Space Telescope  and could give a “glancing blow” to the STEREO-B and Epoxi spacecraft. All these spacecraft can be put into a protective safe mode.

 

The latest eruption was characterized as an X3.2-class flare. The X-class category is the most powerful, and each step up in number indicates a doubling of energy. So this flare was more than twice as powerful as Sunday’s X1.7-class flare.

 

The panel of images above, from NASA’s Earth-orbiting Solar Dynamics Observatory spacecraft, shows the massive eruption of energy in four different wavelengths. Each panel shows what was happening at a different temperature. According to NASA, this provides scientists with insights into the causes of solar flares.

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SSMS Science's curator insight, November 1, 2013 11:39 PM

Solar flares are very powerful. In fact, sometimes, when one erupts it will shoot out and then come back down making an arc of plasma called a prominence. Normally, these arcs are so big that you could run the planet Jupiter through one without touching any of the sides. When a giant solar flare happens, sometimes a big ball of radiation particles shoot out. Now, if this ball were to hit earth, if big enough it could knock out power, communication lines, radio waves, and in general cause mayhem. What's even more cool is that compared to some other stars in the universe, the sun can be considered small. This is just one example of how amazing the universe is. ET

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Double Mastectomy: What We Know About BRCA Mutations and Breast Cancer

Double Mastectomy: What We Know About BRCA Mutations and Breast Cancer | Amazing Science | Scoop.it

Angelina Jolie decided to go for a double mastectomy. She doesn’t have cancer yet, but like many women with breast cancer mutations, she had the radical surgery to lower her risk.

 

Describing her decision as “My Medical Choice,” the 37-year-old actress revealed in an op-ed in the New York Times that she carries the BRCA1 gene mutation, which gives her an 87% risk of developing breast cancer at some point in her life. The abnormal gene also increases her risk of getting ovarian cancer, a typically aggressive disease, by 50%. To counteract those odds, Jolie wrote that she decided to have both her breasts removed.

 

While radical, her decision to pre-empt any future cancer is a common one, and backed by studies. In 2010, Australian scientists found that women with the BRCA1 or BRCA2 mutations who chose to have preventive mastectomies did not develop breast cancer over the three-year follow-up. What’s more, since the genetic abnormalities increase the risk of ovarian cancer, women who had their ovaries and fallopian tubes removed also dramatically lowered their risk of developing ovarian or breast cancers. They were 89% less likely to develop ovarian cancer and 61% less likely to develop breast cancer over three years than their counterparts who did not have prophylactic surgery. Among the 250 study participants who underwent preventive mastectomies, none developed breast cancer during the study follow-up. Additionally, a patient’s surgical choice affected overall mortality rates, both cancer related and not: only 3 percent of surgery participants died at the time of the study follow-up versus 10 percent of those who avoided the surgery.

 

And while the mutations are inherited – a mother with either aberration has a 50-50 chance of passing it on to her children – women who don’t get the mutation are not at increased risk of developing breast cancer, even if they belong to families with a history of the disease. Previous studies had suggested that women who did not have the mutations but had a mother or sister who did, could have up to a five times greater risk of developing different types of breast cancer, which led them to schedule frequent biopsies and even preventive mastectomies. The latest research, however, suggests that’s not necessarily the case.

 

But the new study counters those findings, concluding that the risk of breast cancer in women from BRCA families, who do not carry the mutations themselves, are no higher than that of women in families with other types of breast cancer. The study involved more than 3,000 families with breast cancer, including nearly 300 who had the BRCA1 or BRCA2 mutations.

 

The genetic test for the BRCA mutations isn’t done for every woman, or even for every woman who is at risk of developing breast cancer. Doctors recommend it for those who develop cancer at a young age, or have multiple family members with the disease. It’s expensive – up to $3000 – and insurers require that patients meet a threshold for needing the test before they cover its cost. Jolie is fortunate to be able to afford not just the test but the reconstructive surgery following the procedure as well. But she’s aware that not all women are even aware of the genetic screening and may not be able to afford the testing. She wrote that her goal in announcing her choice to remove her breasts prophylactically is to raise awareness of the test and the treatment options that women have if they are positive for the mutations.

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Bitcoin Network Speed 8 Times Faster than Top 500 Supercomputers Combined

Bitcoin Network Speed 8 Times Faster than Top 500 Supercomputers Combined | Amazing Science | Scoop.it
The bitcoin network speed estimate on bitcoinwatch.com passed 1 exaFLOPS (1,000 petaFLOPS) this week - over 8 times the combined speed of the top 500 supercomputers.

 

The bitcoin network hashrate estimate on bitcoinwatch.compassed 1 exaFLOPS (1,000 petaFLOPS) this week – over 8 times the combined speed of the top 500 supercomputers. Experts will be quick to point out that this estimate is flawed, since no FLOPS are actually used in bitcoin mining. FLOPS stands for FLoating-point Operations Per Second, and is frequently used as a standard to measure computer speed. Bitcoin mining uses an integer calculation and almost no floating-point operations, so converting bitcoin network speed to this standard is somewhat clumsy.

 

The FLOPS estimate is based on the opportunity cost of computers using their hardware for mining instead of other applications.  Miners are using their graphics cards to perform hashes instead of other FLOPS-based distributed computing. Therefore, a conversion rate of 1 hash = 12.7K FLOP is used to estimate what this hardware could be doing.

 

The estimate was created in 2011, before the production of ASIC hardware that now dominates the network. ASICS are custom designed chips that can only perform bitcoin mining calculations. The exaFLOPS estimate breaks down with ASICs, because they are not capable of floating-point operations, and therefore there is no opportunity cost associated with their use.

 

Interestingly, the estimate may still be useful for estimating how well other supercomputers and distributed networking projects would be able to mine bitcoins. Their speed is measured in FLOPS, but they also have the capability of performing the integer operations used in hashing. What would happen if the top 10 supercomputers all switched to bitcoin mining? How much would that affect the network? Lets reverse the equation, and say that they would receive 1 hash for every 12.7k FLOP.

 

The fastest computer, Sequoia, would measure at about 1.6% of the bitcoin network. Their combined speed is 48 petaFLOPS, roughly equivalent to 5% of the bitcoin network. In fact, the top 500 supercomputers have a combined speed of 12% of the bitcoin network.

 

To actually use these computers for mining, It would take more than just installing standard mining software. But lets be honest, these computers have better things to work on like curing cancer, solving global warming, and monitoring banking transactions.

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Valles Marineris: Facts About the Grand Canyon of Mars

Valles Marineris: Facts About the Grand Canyon of Mars | Amazing Science | Scoop.it
This 2,500-mile system is one of the larger canyons in the solar system. 

Covering nearly a fifth the circumference of Mars, the canyon system Valles Marineris reigns as the largest canyon system on the red planet. Dwarfing its Earthly counterpart, the Grand Canyon, the Martian feature is one of the larger canyons in the solar system.

 

Valles Marineris is a system of canyons that spans 2,500 miles (4,000 kilometers). At some points, the canyon is 125 miles (200 km) wide. Regions can reach depths of 6 miles (10 km). If the system were located on Earth, it would stretch across the United States, from Los Angeles to the Atlantic coast.

 

By comparison, Earth's natural wonder, the Grand Canyon, is only 227 miles (446 km) long, 18 miles (30 km) wide, and 1 mile (1.6 km) deep. A windy channel on Venus, Baltis Valles, extends longer than the Martian system, as do a handful of rift valleys on Earth, which form along fault lines as the crust breaks apart.

 

Valles Marineris stretches east-west just below the Martian equator. It starts in the west in the Noctis Labyrinthus, a system of maze-like valleys and canyons, and stretches around 20 percent of the planet to the chaotic terrain near the Chryse Planitia basin.

 

The canyon system contains a number of different features that give clues to its formation. Collapse pits created by rushing water eating away at the land, massive floods, and seeping along canyon walls all point to water just at or beneath the surface at some point in the Martian history. Cracks in the crust, cliffs and walls, and landslides also exist along the expanse of Valles Marineris.

 

The vast canyon can be seen from Earth through a telescope as a dark scarring on the planet's surface. Features known as chasmata, steep depressions that resemble canyons on Earth, dominate the canyon.

The canyon begins in the Noctis Labyrinthus on the western edge, a region of material thought to have volcanic origins. Two parallel chasmata, Ius and Tithonium, stretch eastward, and contain lava flows and faults from the Tharsis Bulge.

 

Three more chasmata, Melas, Candor and Ophir, are connected on the east side of the parallel features. Their floors contain eroded material and volcanic ash. The floor of the Melas chasma contains the deepest point of the canyon system. Coprates Chasma lies farther east, with well-defined layered deposits. These deposits may have formed from landslides or wind-blown material, although the region may once have housed isolated lakes. Eos and Ganges are another set of chasmata that contain volcanic or windblown deposits that have slowly eroded over time.

 

The Valles Marineris system empties into the Chryse region, one of the lowest regions on Mars. Any water from the canyon system would have flown into the lowlands, and it may have once contained an ancient lake or ocean.

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Make your own RADAR invisibility cloak with a 3D printer

Make your own RADAR invisibility cloak with a 3D printer | Amazing Science | Scoop.it
Researchers at Duke University have developed an invisibility cloak that can be made by an entry-level 3D printer.

 

Invisibility cloaks have been around in various forms since 2006, when the first cloak based on optical metamaterials was demonstrated. The design of cloaking devices has come a long way in the past seven years, as illustrated by a simple, yet highly effective, radar cloak developed by Duke University Professor Yaroslav Urzhumov, that can be made using a hobby-level 3D printer.

 

As envisioned by Harry Potter and DARPA, invisibility cloaks are an important new direction for camouflage technology. In contrast to conventional stealth technology, which concentrates on reducing the detection signature (radar cross section, heat signatures, optical detection, etc.) of an object, invisibility cloaks work by making it seem as if radar and light flows around the cloaked object. When successfully accomplished, neither the cloaked object nor the cloak will be detected.

 

How a cloak works can be illustrated by an analogy offered by Duke University Professor David Smith. Imagine a fabric in which the threads are optical fibers. As seen on the left of the image below, light will travel freely from one edge to the opposite edge of a piece of this fabric. If an opaque object is placed so that it blocks some of the light, it is equivalent to cutting a hole in the optical fiber fabric, as seen in the top right-hand image.

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Hermit crabs socialize to evict their neighbors

Hermit crabs socialize to evict their neighbors | Amazing Science | Scoop.it

Social animals usually congregate for protection or mating or to capture bigger prey, but a University of California, Berkeley, biologist has found that the terrestrial hermit crab has a more self-serving social agenda: to kick another crab out of its shell and move into a larger home.

 

All hermit crabs appropriate abandoned snail shells for their homes, but the dozen or so species of land-based hermit crabs – popular terrarium pets – are the only ones that hollow out and remodel their shells, sometimes doubling the internal volume. This provides more room to grow, more room for eggs – sometimes a thousand more eggs – and a lighter home to lug around as they forage.


But empty snail shells are rare on land, so the best hope of moving to a new home is to kick others out of their remodeled shells, said Mark Laidre, a UC Berkeley Miller Post-Doctoral Fellow.

 

When three or more terrestrial hermit crabs congregate, they quickly attract dozens of others eager to trade up. They typically form a conga line, smallest to largest, each holding onto the crab in front of it, and, once a hapless crab is wrenched from its shell, simultaneously move into larger shells.

 

“The one that gets yanked out of its shell is often left with the smallest shell, which it can’t really protect itself with,” said Laidre, who is in the Department of Integrative Biology. “Then it’s liable to be eaten by anything. For hermit crabs, it’s really their sociality that drives predation.”


Laidre says the crabs’ unusual behavior is a rare example of how evolving to take advantage of a specialized niche – in this case, land versus ocean – led to an unexpected byproduct: socialization in a typically solitary animal.

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'Asian Brown Cloud' Pollution Threatens The U.S.

'Asian Brown Cloud' Pollution Threatens The U.S. | Amazing Science | Scoop.it

China and India are some of the world's top polluters, with countless cars, factories, and households belching more than 2 million metric tons of carbon soot and other dark pollutants into the air every year. These pollutants aren't just bad news for the countries themselves. A new study reveals that they can affect climate thousands of kilometers away, warming the United States by up to 0.4°C by 2024, while cooling other countries.

 

Some forms of pollution—especially light-colored aerosols such as sulfates that spew from power plants and volcanoes—scatter light back into space, cooling Earth. But dark aerosols, such as soot from diesel engines and power plants, absorb more sunlight than they scatter, gaining heat and warming the air around them. Rapidly developing countries, especially China, India, and those in southeastern Asia, are prolific sources of such aerosols. Over the past few decades, the pall hanging over the region has come to be known as "the Asian brown cloud."

 

Previous studies have shown that even though layers of air polluted with carbon aerosols become substantially warmer, the cloud slightly cools temperatures at ground level, by some estimates reducing the amount of sunlight reaching the surface by between 10% and 15%. The brown cloud also weakens winds during the Asian summer monsoon and changes the timing and location of monsoon rainfall. The cloud has dramatically thickened in recent decades, with some studies showing that dark aerosol emissions from China alone doubled between 2000 and 2006.

 

To gauge the impact of this thickening, Haiyan Teng, a climate scientist at the National Center for Atmospheric Research in Boulder, Colorado, and colleagues used a detailed climate model that evaluated the interactions among land, sea, atmosphere, and sea ice. In three different scenarios, the team boosted dark, carbon-rich emissions from the equator to 50°N and from 70°E to 150°E, a region that covers India and much of China and southeastern Asia. The scenarios simulated what would happen if dark aerosol emissions doubled between 2005 and 2024, increased to six times current rates, and jumped to 10 times current rates.

 

Increasing the emissions to six and 10 times current rates over the course of 20 years seems extreme, says Teng. But the team used these values because the climate model somewhat underestimates the atmospheric warming caused by dark aerosols. Such tweaking of a climate model "is not unusual," says Yi Ming, a climate scientist with the National Oceanic and Atmospheric Administration in Princeton, New Jersey, who was not involved in the study. "It makes sense to increase the [dark aerosol] emissions to produce the right amount of heating, and to better match observations," he says.

 

The sixfold and 10-fold increases in dark aerosol emissions would cause global average temperatures at ground level to rise 0.1°C by 2024, the researchers report in a forthcoming issue of Geophysical Research Letters. But possibly more important, the thickening brown cloud would trigger significant changes in long-term weather patterns that would affect areas thousands of kilometers away. The effect would be somewhat like a human-made El Niño, the climate phenomenon in which sea-surface warming in the tropical Pacific alters temperature and precipitation in the United States and elsewhere.

 

Although scientists have long studied the effects of pollutants on cloud formation and other small-scale phenomena, determining their effects on climate in distant regions is a relatively new field, says Chien Wang, an atmospheric scientist at the Massachusetts Institute of Technology in Cambridge, who wasn't involved in the research. The new findings "are not surprising at all," he notes. However, he adds, the team's new study "is a highly idealized experiment," so the results are probably more accurate in terms of capturing the overall pattern of changes than they are at estimating the precise amount of warming or cooling in a particular locale.

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Kyle Sullivan's comment, July 10, 2013 1:26 PM
good for after effects of volcanoes
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Arctic Sea Ice Could Be Gone In 25 Years

A recent report complied by environmental experts stated an alarming find: The rapid rate in which the Arctic Ocean's ice caps are melting may mean that the sea ice will cease to exist within the next 20-25 years.

 

Scientists from the National Snow and Ice Data Center (NSIDC) released preliminary figures last week, suggesting that Arctic sea ice has reached it lowest level in recorded history. The Arctic sea ice has been monitored since 1979, and according to the data on September 16th Arctic ice extent noted drop of at least 45% since records began and measured at 3.41 million sq. km.

 

The previous record low for Arctic sea ice extent, set on September 18, 2007 with a 4.17-million sq.-km. ice cap, was already shattered by the end of August this year when it had melted to below 4-million sq. km.

 

The depleting ice cover would have serious ramifications for the planet, as Arctic ice acts as a reflector of sunlight, helping regulate the Earth’s temperature and cooling the climate.

 

“When there’s no longer that sea ice below the air mass and it’s just open ocean, that’s when more moisture off the ocean’s surface gets into the atmosphere and the water vapor in the atmosphere makes for more violent storms,” John Yackel, a sea ice geophysicist and climatologist with the Cryosphere Climate Research Group, explained.

 

“We can also expect to see an increase in storm frequency and storm intensity for most of the world’s populated places as the Arctic and Earth continues to warm,” he added.

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Male Didelphids Opossum Uses Sperm-Pairing To Increase Sperm Survival

Male Didelphids Opossum Uses Sperm-Pairing To Increase Sperm Survival | Amazing Science | Scoop.it

Sperm pairing is an unusual phenomenon that occurs in New World, but not Australian or New Guinean, marsupial mammals. Newly formed spermatozoa join up precisely along the sides of their heads, leaving their tails to move freely, thus apparently improving their ability to navigate the fluids contained in the female reproductive tract. The mechanism that causes the sperm to pair in the male reproductive tract and, later in the female tract, to separate, is not fully understood.

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Welcome To A Fully Programmable World Where All Objects Act as One

Welcome To A Fully Programmable World Where All Objects Act as One | Amazing Science | Scoop.it

We are surrounded by tiny, intelligent devices that capture data about how we live and what we do. Soon we'll be able to choreograph them to respond to our needs, solve our problems, and even save our lives.

 

Imagine a factory where every machine, every room, feeds back information to solve problems on the production line. Imagine a hotel room (like the ones at the Aria in Las Vegas) where the lights, the stereo, and the window shade are not just controlled from a central station but adjust to your preferences before you even walk in. Think of a gym where the machines know your workout as soon as you arrive, or a medical device that can point toward the closest defibrillator when you have a heart attack. Consider a hybrid car—like the new Ford Fusion—that can maximize energy efficiency by drawing down the battery as it nears a charging station.

 

There are few more appropriate guides to this impending future than Hawkinson, whose DC-based startup, SmartThings, has built what’s arguably the most advanced hub to tie connected objects together. At his house, more than 200 objects, from the garage door to the coffeemaker to his daughter’s trampoline, are all connected to his SmartThings system. His office can automatically text his wife when he leaves and tell his home A/C system to start powering up.

 

In this future, the intelligence once locked in our devices now flows into the universe of physical objects. Technologists have struggled to name this emerging phenomenon. Some have called it the Internet of Things or the Internet of Everything or the Industrial Internet—despite the fact that most of these devices aren’t actually on the Internet directly but instead communicate through simple wireless protocols. Other observers, paying homage to the stripped-down tech embedded in so many smart devices, are calling it the Sensor Revolution.

 

But here’s a better way to think about what we’re building: It’s the Programmable World. After all, what’s remarkable about this future isn’t the sensors, nor is it that all our sensors and objects and devices are linked together. It’s the fact that once we get enough of these objects onto our networks, they’re no longer one-off novelties or data sources but instead become a coherent system, a vast ensemble that can be choreographed, a body that can dance. Really, it’s the opposite of an “Internet,” a term that even today—in the era of the cloud and the app and the walled garden—connotes a peer-to-peer system in which each node is equally empowered. By contrast, these connected objects will act more like a swarm of drones, a distributed legion of bots, far-flung and sometimes even hidden from view but nevertheless coordinated as if they were a single giant machine.

 

For the Programmable World to reach its full potential, we need to pass through three stages. The first is simply the act of getting more devices onto the network—more sensors, more processors in everyday objects, more wireless hookups to extract data from the processors that already exist. The second is to make those devices rely on one another, coordinating their actions to carry out simple tasks without any human intervention. The third and final stage, once connected things become ubiquitous, is to understand them as a system to be programmed, a bona fide platform that can run software in much the same manner that a computer or smartphone can.

 

Once we get there, that system will transform the world of everyday objects into a design­able environment, a playground for coders and engineers. It will change the whole way we think about the division between the virtual and the physical. This might sound like a scary encroachment of technology, but the Programmable World could actually let us put more of our gadgets away, automating activities we normally do by hand and putting intelligence from the cloud into everything we touch.

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CAEXI BEST's curator insight, May 15, 2013 5:21 PM
Bienvenue dans un monde entièrement programmable où tous les objets agissent comme un seul
Tom Leckrone's curator insight, May 26, 2013 10:03 AM

Excerpt: "The third and final stage, once connected things become ubiquitous, is to understand them as a system to be programmed, a bona fide platform that can run software in much the same manner that a computer or smartphone can." 

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Making “cognitive radio" practical which scans environments for vacant frequencies to use for transmissions

Making “cognitive radio" practical which scans environments for vacant frequencies to use for transmissions | Amazing Science | Scoop.it

The way in which radio spectrum is currently allocated to different wireless technologies can lead to gross inefficiencies. In some regions, for instance, the frequencies used by cellphones can be desperately congested, while large swaths of the broadcast-television spectrum stand idle.


One solution to that problem is the 15-year-old idea of “cognitive radio,” in which wireless devices would scan their environments for vacant frequencies and use these for transmissions. Different proposals for cognitive radio place different emphases on hardware and software, but the chief component of many hardware approaches is a bank of filters that can isolate any frequency in a wide band.

Researchers at MIT’s Microsystems Technology Laboratory (MTL) have developed a new method for manufacturing such filters that should improve their performance while enabling 14 times as many of them to be crammed on a single chip. That’s a vital consideration in handheld devices where space is tight. But just as important, the new method uses techniques already common in the production of signal-processing chips, so it should be easy for manufacturers to adopt. There are two main approaches to hardware-based radio-signal filtration: one is to perform the filtration electronically; the other is to convert the radio signal to an acoustic signal — a physical vibration — and then convert it back to an electrical signal.


Both types of filtration use devices called resonators, and acoustic resonators have a couple of clear advantages over electronic ones. One is that their filtration is more precise. 

“If I pluck a guitar string — that’s the easiest resonator to think of — it’s going to resonate at some frequency, and it’s going to die down due to losses,” Weinstein explains. “That loss is related to, basically, energy leaked away from that resonance mode into all other frequencies. Less loss means better frequency selectivity, and mechanical acoustic resonators have less loss than electrical resonators.”


Commercial adoption of cognitive radio has been slow for a number of reasons. “Part of it is being able to get the frequency-agile components and do it in a cost-effective manner,” says Thomas Kazior, a principal engineering fellow at Raytheon. “Plus the size constraint: Filters tend to be big to begin with, and banks of tunable filters just make things even bigger.”

The MTL researchers’ work could help with both problems, Kazior says. “We’re talking about making filters that are directly integrated onto, say, a receiver chip, because the little resonator devices are literally the size of a transistor,” he says. “These are all on a tiny scale.”

“They can help with the cost problem because these resonator-type structures almost come for free,” Kazior adds. “Building them is part of the semiconductor fabrication process, using pretty much the existing fabrication steps that you’re using to build the transistor and the rest of the circuits. You just may need to add one, or two at the most, additional steps — out of 100 or more steps."

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Team uncovers fundamental property of astatine, rarest element on Earth

Team uncovers fundamental property of astatine, rarest element on Earth | Amazing Science | Scoop.it

An international team of scientists, including a University of York researcher, has carried out ground-breaking experiments to investigate the atomic structure of astatine (Z=85), the rarest naturally occurring element on Earth. Astatine (At) is of significant interest as its decay properties make it an ideal short-range radiation source for targeted alpha therapy in cancer treatment.

The results of the project, which was conceived by Professor Andrei Andreyev, an Anniversary Professor in the Department of Physics at the University of York, and Dr Valentine Fedosseev, from CERN, the European laboratory for nuclear physics research in Geneva.

 

Through experiments conducted at the radioactive isotope facility ISOLDE at CERN, scientists have accessed, for the first time, the ionization potential of the astatine atom. This represents the essential quantity defining chemical and physical properties of this exclusively radioactive element. At ISOLDE, short-lived isotopes created in nuclear reactions induced by a high energy proton beam release from target material and can immediately interact with laser beams inside the hot cavity of laser ion source.

 

Once the wavelengths of lasers are tuned in resonance with selected atomic transitions the atoms are step-wise excited and ionized due to absorption of several photons with total energy exceeding the ionization threshold. This so-called Resonance Ionization Laser Ion Source (RILIS), in combination with electromagnetic separator, supplies pure isotopic beams of different elements for many experiments performed at ISOLDE.

 

Among these, is a study of short-lived nuclides by in-source resonance ionization spectroscopy using a highly sensitive (below 1 isotope per second) detection of nuclear decay. Physicists from KU Leuven, Belgium developed the setup for this study. The first laser-ionized ions of astatine were observed and identified by its characteristic alpha-decay in these experiments. Also the ionization threshold of astatine was found by scanning the wavelength of ionizing UV laser.

 

A second phase of the study of the atomic spectrum of astatine took place at the ISAC radioactive isotope facility of the Canadian national laboratory for particle and nuclear physics TRIUMF in Vancouver, where new optical transitions in the infrared region of spectrum were found. With the newly found transitions a highly efficient three-step ionization scheme of astatine was defined and used at ISOLDE RILIS for further study of astatine spectrum.

 

The researchers probed the interesting region around the ionization threshold and found a series of highly excited resonances – known as Rydberg states. From this spectrum the first ionization potential of astatine was extracted with high accuracy.

 

Dr Fedosseev, the RILIS team leader working at CERN, said: "The in-source laser spectroscopy today is a most sensitive method to study atomic properties of exotic short-lived isotopes. For artificially produced elements, like super-heavy ones, this could be a real way to probe their spectra. The success in the study of astatine spectrum added confidence to such projects started recently at GANIL, France and at JINR, Russia."

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New principle may help explain why nature is quantum

New principle may help explain why nature is quantum | Amazing Science | Scoop.it
Like small children, scientists are always asking the question 'why?'. One question they've yet to answer is why nature picked quantum physics, in all its weird glory, as a sensible way to behave.

 

We know that things that follow quantum rules, such as atoms, electrons or the photons that make up light, are full of surprises. They can exist in more than one place at once, for instance, or exist in a shared state where the properties of two particles show what Einstein called "spooky action at a distance", no matter what their physical separation. Because such things have been confirmed in experiments, researchers are confident the theory is right. But it would still be easier to swallow if it could be shown that quantum physics itself sprang from intuitive underlying principles.

One way to approach this problem is to imagine all the theories one could possibly come up with to describe nature, and then work out what principles help to single out quantum physics. A good start is to assume that information follows. Einstein's special relativity and cannot travel faster than light. However, this alone isn't enough to define quantum physics as the only way nature might behave. Corsin and Stephanie think they have come across a new useful principle. "We have found a principle that is very good at ruling out other theories," says Corsin.

 

In short, the principle to be assumed is that if a measurement yields no information, then the system being measured has not been disturbed. Quantum physicists accept that gaining information from quantum systems causes disturbance. Corsin and Stephanie suggest that in a sensible world the reverse should be true, too. If you learn nothing from measuring a system, then you can't have disturbed it.

 

As is often the case in research, Corsin and Stephanie reached this point having set out to solve an entirely different problem altogether. Corsin was trying to find a general way to describe the effects of measurements on states, a problem that he found impossible to solve. In an attempt to make progress, he wrote down features that a 'sensible' answer should have. This property of information gain versus disturbance was on the list. He then noticed that if he imposed the property as a principle, some theories would fail.

 

Corsin and Stephanie are keen to point out it's still not the whole answer to the big 'why' question: theories other than quantum physics, including classical physics, are compatible with the principle. But as researchers compile lists of principles that each rule out some theories to reach a set that singles out quantum physics, the principle of information gain versus disturbance seems like a good one to include.

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Tom Leckrone's curator insight, May 26, 2013 10:07 AM

Investigation all comes down to "information gain versus disturbance."

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New Skin Patch Warns People When It’s Time to Get Out of the Sun

New Skin Patch Warns People When It’s Time to Get Out of the Sun | Amazing Science | Scoop.it

By the time most of us realize we’ve been out in the sun too long, it’s too late. It can take up to 24 hours after exposure before you realize you have a sunburn.

 

Now, a Michigan Technological University Senior Design team has devised a sensor that tells you when it’s time to seek shelter, long before your skin gets red and tender.

 

The biomedical engineering seniors developed a skin patch imprinted with a graphic—in this case, a happy face design. The nickel-size patch gradually darkens under ultraviolet light, the type of light that causes sunburn and skin cancer.  When you can’t see the happy face anymore, it’s time to get out of the sun.

 

Not everyone burns at the same rate, and the team took that into account. “We calibrated it based on skin type,” said team member Anne François. Their prototypes were made for the three skin types that are most susceptible to sunburn.

 

The patch is made with UV-sensitive film bonded to a special tape with medical-grade adhesive that can withstand plenty of trips into the swimming pool. Because it measures total UV exposure, it “knows” when a user applies sunscreen or goes in the shade and darkens more slowly.

The team has filed a provisional patent on their invention and received Best Overall Award in the  Invention Disclosure Competition at Michigan Tech’s 2013 Undergraduate Expo. If it makes it to market, it would be inexpensive: the prototypes cost only 13 cents apiece in materials.

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Creating a sense of touch in a prosthetic hand

Creating a sense of touch in a prosthetic hand | Amazing Science | Scoop.it

Scientists have made tremendous advances toward building lifelike prosthetic limbs that move and function like the real thing. But what’s missing is a sense of touch, so a patient knows how hard he or she is actually squeezing something, or exactly where the object is positioned relative to his or her hand.


“If you lose your somatosensory [body senses] system, it almost looks like your motor system is impaired,” he said. “If you really want to create an arm that can actually be used dexterously without the enormous amount of concentration it takes without sensory feedback, you need to restore the somatosensory feedback.”


This is the related to a similar problem with robots (see “Related” below), where researchers have built better sensors into their the robots’ limbs and hands, along with better processing systems and control systems. 

 

So a team of University of Chicago neurobiologists, headed by Sliman Bensmaia, assistant professor of organismal biology and anatomy, came up with an idea: why not try the same thing, starting with a monkey?

To restore the somatosensory feedback, they equipped a robotic hand with pressure sensors.

 

These send electrical signals for processing, and from there to electrodes implanted in the brain to recreate the same response to touch as a real hand. The researchers used rhesus macaques that were trained to respond to stimulation of the hand. Their hands were hidden so they wouldn’t see that they weren’t actually being touched, and were given electrical pulses to simulate the sensation of touch.


The animals had electrodes implanted into the area of the brain that responds to touch to check the animals’ responses to each type of stimulus. By combining the poking and brain-response data, the researchers were able to create a mathematical function that described the level of electrical pulses in the brain corresponding to different levels of physical pokes of the hand.


Then,switched to a prosthetic hand that was wired to the brain implants. They touched the prosthetic hand with the physical probe, which in turn sent similar electrical signals to the brain. Bensmaia said that the animals performed identically whether poked on their own hand or on the prosthetic one.


“This is the first time as far as I know where an animal or organism actually perceives a tactile stimulus through an artificial transducer,” Bensmaia said.

“It’s an engineering milestone. But from a neuroengineering standpoint, this validates this function. You can use this function to have an animal perform this very precise task, precisely identically.”


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New device can extract human DNA with full genetic data in minutes

New device can extract human DNA with full genetic data in minutes | Amazing Science | Scoop.it

Take a swab of saliva from your mouth and within minutes your DNA could be ready for analysis and genome sequencing with the help of a new device.

 

University of Washington engineers and NanoFacture, a Bellevue, Wash., company, have created a device that can extract human DNA from fluid samples in a simpler, more efficient and environmentally friendly way than conventional methods.

 

The device will give hospitals and research labs a much easier way to separate DNA from human fluid samples, which will help with genome sequencing, disease diagnosis and forensic investigations.

 

“It’s very complex to extract DNA,” said Jae-Hyun Chung, a UW associate professor of mechanical engineering who led the research. “When you think of the current procedure, the equivalent is like collecting human hairs using a construction crane.”

 

This technology aims to clear those hurdles. The small, box-shaped kit now is ready for manufacturing, then eventual distribution to hospitals and clinics. NanoFacture, a UW spinout company, signed a contract with Korean manufacturer KNR Systems last month at aceremony in Olympia, Wash.

 

The UW, led by Chung, spearheaded the research and invention of the technology, and still manages the intellectual property. Separating DNA from bodily fluids is a cumbersome process that’s become a bottleneck as scientists make advances in genome sequencing, particularly for disease prevention and treatment. The market for DNA preparation alone is about $3 billion each year.

 

Conventional methods use a centrifuge to spin and separate DNA molecules or strain them from a fluid sample with a micro-filter, but these processes take 20 to 30 minutes to complete and can require excessive toxic chemicals.

 

UW engineers designed microscopic probes that dip into a fluid sample – saliva, sputum or blood – and apply an electric field within the liquid. That draws particles to concentrate around the surface of the tiny probe. Larger particles hit the tip and swerve away, but DNA-sized molecules stick to the probe and are trapped on the surface. It takes two or three minutes to separate and purify DNA using this technology.

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Biosciencia's curator insight, May 15, 2013 7:25 AM

The device will give hospitals and research labs a much easier way to separate DNA from human fluid samples, which will help with genome sequencing, disease diagnosis and forensic investigations.

Linda Coburn's comment, May 15, 2013 11:28 AM
It bothers me that an American university which receives American tax dollars for funding has decided to contract with a Korean company to manufacture this amazing device. We will never solve our economic woes if we don't bring mfg back to the US.
Center for Accessible Living NKY's curator insight, May 15, 2013 5:29 PM

This should make obtaining genetic diagnosis much easier and faster.

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Ultra-Ever Dry hydrophobic and oleophobic coating repels almost any liquid

Ultra-Ever Dry hydrophobic and oleophobic coating repels almost any liquid | Amazing Science | Scoop.it

The two part Ultra-Ever Dry system creates a near invisible barrier of air over surfaces on the nanoscale. These surfaces can range from refined oil, wet concrete, water, mud and other liquids. In industrial application Ultra-Dry could prove ideal for specific applications, like when you drop your hammer in mud, and then step in the mud in your boots, and reach into the mud with your work-gloves.

 

Water proofing products and barriers are not new but according to the manufacturer, Ultra-Ever Dry has improved adhesion and abrasion resistance compared to previous iterations. The supposed adhesion and abrasive resistance traits then allow for a more diverse range of uses. Other claims include anti-icing, anti-corrosive, anti-contamination and self-cleaning capabilities.

 

But according to the abrasion resistance notes Ultra-Ever Dry provides "more abrasion resistance than previous superhydrophobic materials." Registering a 110 on the Taber Abrasion Method (ASTM D4060-10) the manufacturer recommends testing of surfaces if abrasion is a concern.

 

The product can be applied with a spray gun and finishes up to a translucent white sheen. A single coating is reported to last anywhere from 2-8 months in direct sunlight and outdoor conditions before a top-coat re-coating is needed. Indoor and protected outdoor applications put longevity at approximately one year or more. From the underside of a Polar Bear to the backside of a New York taxi driver in August, Ultra-tech professes a working hot/cold range of -30°F to 300°F (-34°C to 149°C).

 

Can I use it on my SquareBob lunchbox? Maybe. In addition to the "do not breathe this" warning a rather toxic grocery list of chemicals makes up the ingredients, thus making the coating a less than ideal Peanut Butter & Jam option. However, according to Ultra-tech there are no known environmental concerns. The coating is stated to be safe for use in "nonfood" (i.e. not your lunchbox) contact areas of food processing plants and meets FDA and USDA regulations for those types of applications.

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