Lois Lane Saves the World!
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An team of international experts has announced a new observation of high-energy neutrino particles using an instrument funded by the National Science Foundation (NSF). The particles from beyond our galaxy have been detected at the geographic South Pole, using a massive instrument buried deep in ice.The scientists from the IceCube Collaboration, a research team with headquarters at the Wisconsin IceCube Particle Astrophysics Center at the University of Wisconsin-Madison, pub [...]
Karen Foster, Prevent DiseaseExtra virgin olive oil has the capacity to induce rapid death in cancer cells while leaving healthy cells intact. The many implicated health benefits of olive oil is well known, however scientists have been unable to effectively confirm the anti-cancer phenomenon until now. The processing of olive oils also highly differentiates the concentration of anti-cancer compounds.Oleocanthal (OC), a phenolic compound in extra virgin olive oil (EVOO), has been impl [...]
Europa is thought to have a subsurface ocean. Salt from this hidden sea might be emerging in long fractures visible in the moon’s crust.
Excerpt earthsky.org
Laboratory experiments have lead to new information about the chemical composition of the mysterious dark material in the long, dark fractures on the surface of Europa, a large moon of Jupiter. Researchers at NASA’s Jet Propulsion Laboratory (JPL) mimicked conditions on Europa’s surface. They now say that the dark material is discolored salt, likely sea salt from below the moon’s icy crust. The journal Geological Research Letters published their study on May 15, 2015.
The scientists say this new insight is important in considering whether this icy moon might be hospitable for extraterrestrial life. The life question is a key one for Europa, since this world is believed to have a liquid ocean beneath its crust. The presence of sea salt on Europa’s surface suggests the ocean is interacting with its rocky seafloor.
Scientists have been intensely curious about Europa since Galileo discovered it in 1610. In recent years, they’ve puzzled over the dark material coating the long, linear fractures on Europa’s observable surface. The material was associated with young terrain on this moon of Jupiter, suggesting that it had erupted from within Europa.
However, the chemical composition of the dark material remained elusive, until now.
Planetary scientist Kevin Hand at JPL led the new study. He said in a statement:
If it’s just salt from the ocean below, that would be a simple and elegant solution for what the dark, mysterious material is.Europa is immersed radiation from Jupiter’s powerful magnetic field, causing high-powered electrons to slam into the moon’s surface. Hand and his team created a laboratory test that mimicked the conditions of Europa’s temperature, pressure, and radiation exposure. They tested a variety of samples including common salt – sodium chloride – and salt water in a vacuum chamber at Europa’s chilly surface temperature of minus 280 degrees Fahrenheit (minus 173 Celsius). They also bombarded the samples with an electron beam to imitate Jupiter’s influence.
After several hours – a time period corresponding to over a century on Europa, the researchers said – the salt samples were observed to go from white to a yellowish brown, the color similar to the features on the icy moon. Hand said:
This work tells us the chemical signature of radiation-baked sodium chloride is a compelling match to spacecraft data for Europa’s mystery material.
A “Europa-in-a-can” laboratory setup at NASA-JPL mimics conditions of temperature, near vacuum and heavy radiation on the surface of Jupiter’s icy moon. Image via NASA/JPL-Caltech
Close-up of salt grains discolored by radiation following exposure in a “Europa-in-a-can” test setup at JPL. Image via NASA/JPL-Caltech
A visit to this icy world would help answer the most tantalizing questions about Europa. Long believed to have a liquid ocean of salt water below its icy surface, this moon continues to display promising conditions for extraterrestrial life.
As Europa orbits Jupiter, it experiences strong tidal forces similar to Earth and the Moon. These forces from Jupiter and the other Jovian moons cause Europa to flex and stretch, which creates heat, and results in Europa having a warm internal temperature than it would with just the heat from the Sun alone.
Recent observable geological activity also creates strong evidence that the subsurface ocean interacts directly with Europa’s rocky interior, making geothermal vents, like those in Earth’s oceans, a strong possibility as well.
These hydrothermal vent ecosystems on Earth thrive with no energy from the sun. Bacteria, shrimp and crustaceans have all been observed in these extreme environments, surviving on what researchers have deemed chemosythesis.
With Europa’s enormous amount of liquid salt water, essential chemical elements and geological activity, this long discovered icy moon appears to be one of the solar systems most promising locations for habitable requirements for life.
However, until a devoted spacecraft visit’s, nothing beyond hopeful speculation can be proven, the researchers say.
Bottom line: Researchers at NASA’s Jet Propulsion Laboratory created laboratory conditions that mimicked those on Jupiter’s large moon Europa, to learn the chemical compositions of the material in long, dark fractures in the moon’s surface. They now believe this material is sea salt, which has emerged to Europa’s surface from its liquid ocean below.
Dr. MercolaThe US government has finally admitted they’ve overdosed Americans on fluoride and, for first time since 1962, are lowering its recommended level of fluoride in drinking water.1,2,3About 40 percent of American teens have dental fluorosis,4 a condition referring to changes in the appearance of tooth enamel—from chalky-looking lines and splotches to dark staining and pitting—caused by long-term ingestion of fluoride during the time teeth are forming.In some areas, fluoro [...]
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| The Antennae galaxies, shown in visible light in a Hubble image (upper image), were studied with ALMA, revealing extensive clouds of molecular gas (center right image). One cloud (bottom image) is incredibly dense and massive, yet apparently star free, suggesting it is the first example of a prenatal globular cluster ever identified. |
Excerpt from huffingtonpost.com
A dense cloud of gas 50 million light-years away has astronomers buzzing, and they're using all sorts of strange metaphors to get the rest of us to pay attention.
They've discovered what they think may be a globular cluster -- a big ball of up to one million stars -- on the verge of being born.
“This remarkable object looks like it was plucked straight out of the very early universe," Dr. Kelsey Johnson, an astronomer at the University of Virginia in Charlottesville and lead author on a paper about the research, said in a written statement. "To discover something that has all the characteristics of a globular cluster, yet has not begun making stars, is like finding a dinosaur egg that’s about to hatch.”
ALMA image of dense cores of molecular gas in the Antennae galaxies. The round yellow object near the center may be the first prenatal example of a globular cluster ever identified. It is surrounded by a giant molecular cloud.
Johnson and her colleagues spotted the bizarre object, which they call the "Firecracker," using the Atacama Large Millimeter/submillimeter Array (ALMA) in the Atacama desert in Chile. It's located inside a pair of interacting galaxies known to scientists as NGC 4038/NGC 4039, or The Antennae Galaxies.
The Firecracker has a mass that's 50 times that of our sun, and is under an enormous amount of pressure -- roughly 10,000 times greater than the average pressure in interstellar space. According to the researchers, this makes it a good candidate for collapsing into a globular cluster within the next million years.
What do other scientists make of the discovery? Dr. Alison Peck, ALMA scientist at the National Radio Astronomy Observatory, who was not involved in the new research, called it "important" and said she was "really excited to hear about these results."
She told The Huffington Post in an email:
"One of the things that we all yearn to understand is how our surroundings formed, how our galaxy and our solar system came to be. To do this, since we can’t actually watch things change over time, (it just takes too long), we need to find similar objects at different stages of development and compare them. What Dr. Johnson’s team have found here is an analog of an object that we look for in the very early universe, but they’ve found it so close by that we’ll be able to make extremely detailed observations and find out much more about the physical conditions in this exciting region."The research is set to be published in the Astrophysical Journal.
Excerpt from dailytimes.com.pk
The sun has unleashed its most powerful flare of the year causing radio blackouts throughout the Pacific region.
The enormous X-class solar flare peaked at 6:11pm ET yesterday from a sunspot called Active Region 2339 (AR2339).
Solar flares are powerful bursts of radiation that, when intense enough, can disturb the atmosphere in the layer where GPS and communications signals travel - and scientists say they could get more powerful in the future.
This latest flare is classified as an X2.7. X-class denotes the most intense flares, while the number provides more information about its strength.
Despite the recent radio blackouts, scientists say the flare is unlikely to cause any further major issues here on Earth.
‘Given the impulsive nature of this event, as well as the source location on the eastern limb of the sun, we are not expecting a radiation storm at Earth,’ scientists with the U.S. Space Weather Prediction Center (SWPC) in Boulder, Colorado.
‘We will be on the lookout for new imagery from the Nasa Soho [Solar and Heliospheric Observatory] mission to determine if there was an associated coronal mass ejection (CME) with this event,’ they added.
‘Given the same logic above, however, we do not expect there to be one that would impact Earth.’
Yesterday Kazunari Shibata, an astrophysicist from Kyoto University in Japan, said the sun has the potential to unleash a flare of such a magnitude that it would be larger than anything humans have ever seen.
At the Space Weather Workshop in Colorado, Shibata said ‘superflares,’ that contain energy 1,000 times larger than what we have seen could be on their way.
He said there is evidence of this happening every 800 to 5,000 years on Earth,
Scientists say such a solar ‘super-storm’ would pose a ‘catastrophic’ and ‘long-lasting’ threat to life on Earth.
A superflare would induce huge surges of electrical currents in the ground and in overhead transmission lines, causing widespread power outages and severely damaging critical electrical components.
The largest ever solar super-storm on record occurred in 1859 and is known as the Carrington Event, named after the English astronomer Richard Carrington who spotted the preceding solar flare.
This massive CME released about 1022 kJ of energy - the equivalent to 10 billion Hiroshima bombs exploding at the same time - and hurled around a trillion kilos of charged particles towards the Earth at speeds of up to 3000 km/s.
However, its impact on the human population was relatively benign as our electronic infrastructure at the time amounted to no more than about 124,000 miles (200,000 km) of telegraph lines.
Nasa has also released incredible footage showing the sun unleashing a huge lick of plasma that increased the star’s visible hemisphere by almost half.
The solar filament, which exploded on April 28 and 29, was suspended above the sun due to strong magnetic fields that pushed outwards.
Solar astronomers around the world had their eyes on this unusually large filament and kept track as it erupted.
Nasa’s animation involves images taken from the orbiting Solar and Heliospheric Observatory using its Large Angle Spectrometric Coronagraph.
The diameter of the animation is about 30 million miles (45 million km) at the distance of the sun, or half of the diameter of the orbit of Mercury.
The white circle in the centre of the round disk represents the size of the sun, which is being blocked by the telescope in order to see the fainter material around it.
An artist's depiction of the exoplanet 55 Cancri E with its molten surface exposed on the left, and covered in gas and ash on the right. (NASA/JPL - Caltech/R.Hurt)Excerpt from latimes.comScientists have found an extreme planet where the atmospheric ...
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| Pulsars are types of neutron stars; the dead relics of massive stars. What sets pulsars apart from regular neutron stars is that they’re highly magnetized, and rotating at enormous speeds. |
Excerpt from uncovercalifornia.com
A Pulsar with the widest orbit around a neutron star has been discovered by a team of high school students and the discovery has been confirmed by astronomers. High School students from many states who participated in NSF-funded educational outreach program have found the pulsar after analyzing data from Robert C. Byrd Green Bank Telescope (GBT).
In a research paper accepted by the Astrophysical Journal, lead author Joe Swiggum, a graduate student in physics and astronomy at West Virginia University in Morgantown, said, “Pulsars are some of the most extreme objects in the universe. The students' discovery shows one of these objects in a really unique set of circumstances.”
The object has been codenamed PSR J1930-1852 by astronomers. It was discovered in 2012 by Cecilia McGough from Strasburg High School in Virginia and De'Shang Ray from Paul Laurence Dunbar High School in Baltimore, Maryland.
The discovery of a pulsar with extra wide orbit could help in understanding the concepts behind binary neutron star systems. Nearly 10 percent of known pulsars are in binary systems with most of them orbiting white dwarf companion stars. The Pulsar has been found with the widest separation from the other star in the binary neutron system.
During Pulsar Search Collaboratory (PSC) workshop in summer, students who are interested in analyzing survey data collected by Green Bank Telescope (GBT), spend weeks in checking data plots and searching for unique signatures of pulsars.
The Pulsar Search Collaboratory is a joint venture between the National Radio Astronomy Observatory and West Virginia University which offers real research opportunity to students.
In a research paper accepted by the Astrophysical Journal, lead author Joe Swiggum, a graduate student in physics and astronomy at West Virginia University in Morgantown, said, “Pulsars are some of the most extreme objects in the universe. The students' discovery shows one of these objects in a really unique set of circumstances.”
The object has been codenamed PSR J1930-1852 by astronomers. It was discovered in 2012 by Cecilia McGough from Strasburg High School in Virginia and De'Shang Ray from Paul Laurence Dunbar High School in Baltimore, Maryland.
The discovery of a pulsar with extra wide orbit could help in understanding the concepts behind binary neutron star systems. Nearly 10 percent of known pulsars are in binary systems with most of them orbiting white dwarf companion stars. The Pulsar has been found with the widest separation from the other star in the binary neutron system.
During Pulsar Search Collaboratory (PSC) workshop in summer, students who are interested in analyzing survey data collected by Green Bank Telescope (GBT), spend weeks in checking data plots and searching for unique signatures of pulsars.
The Pulsar Search Collaboratory is a joint venture between the National Radio Astronomy Observatory and West Virginia University which offers real research opportunity to students.
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Excerpt from computerworld.com
By Sharon Gaudin
IBM scientists say they have made two critical advances in an industrywide effort to build a practical quantum computer, shaving years off the time expected to have a working system.
"This is critical," said Jay Gambetta, IBM's manager of theory of quantum computing. "The field has got a lot more competitive. You could say the [quantum computing] race is just starting to begin… This is a small step on the journey but it's an important one."
Gambetta told Computerworld that IBM's scientists have created a square quantum bit circuit design, which could be scaled to much larger dimensions. This new two-dimensional design also helped the researchers figure out a way to detect and measure errors.
Quantum computing is a fragile process and can be easily thrown off by vibrations, light and temperature variations. Computer scientists doubt they'll ever get the error rate down to that in a classical computer.
Because of the complexity and sensitivity of quantum computing, scientists need to be able to detect errors, figure out where and why they're happening and prevent them from recurring.
IBM says its advancement takes the first step in that process.
"It tells us what errors are happening," Gambetta said. "As you make the square [circuit design] bigger, you'll get more information so you can see where the error was and you can correct for it. We're showing now that we have the ability to detect, and we're working toward the next step, which would allow you to see where and why the problem is happening so you can stop it from happening."
Quantum computing is widely thought to be the next great step in the field of computing, potentially surpassing classical supercomputers in large-scale, complex calculations.
Quantum computing would be used to cull big data, searching for patterns. It's hoped that these computers will take on questions that would lead to finding cures for cancer or discovering distant planets – jobs that might take today's supercomputers hundreds of years to calculate.
IBM's announcement is significant in the worlds of both computing and physics, where quantum theory first found a foothold.
Quantum computing, still a rather mysterious technology, combines both computing and quantum mechanics, which is one of the most complex, and baffling, areas of physics. This branch of physics evolved out of an effort to explain things that traditional physics is unable to.
For instance, each bit, also known as a qubit, in a quantum machine can be a one and a zero at the same time. When a qubit is built, it can't be predicted whether it will be a one or a zero. A qubit has the possibility of being positive in one calculation and negative in another. Each qubit changes based on its interaction with other qubits.
Because of all of these possibilities, quantum computers don't work like classical computers, which are linear in their calculations. A classical computer performs one step and then another. A quantum machine can calculate all of the possibilities at one time, dramatically speeding up the calculation.
However, that speed will be irrelevant if users can't be sure that the calculations are accurate.
That's where IBM's advances come into play.
"This is absolutely key," said Jim Tully, an analyst with Gartner. "You do the computation but then you need to read the results and know they're accurate. If you can't do that, it's kind of meaningless. Without being able to detect errors, they have no way of knowing if the calculations have any validity."
If scientists can first detect and then correct these errors, it's a major step in the right direction to building a working quantum computing system capable of doing enormous calculations.
"Quantum computing is a hard concept for most to understand, but it holds great promise," said Dan Olds, an analyst with The Gabriel Consulting Group. "If we can tame it, it can compute certain problems orders of magnitude more quickly than existing computers. The more organizations that are working on unlocking the potential of quantum computing, the better. It means that we'll see something real that much sooner."
A year ago, D-Wave Systems Inc. announced that it had built a quantum system, and that NASA, Google and Lockheed Martin had been testing them.
Many in the computer and physics communities doubt that D-Wave has built a real quantum computer. Vern Brownell, CEO of the company, avows that they have.
"I think that quantum computing shows promise, but it's going to be quite a while before we see systems for sale," said Olds.
IBM's Gambetta declined to speculate on whether D-Wave has built a quantum computing but said the industry is still years away from building a viable quantum system.
"Quantum computing could be potentially transformative, enabling us to solve problems that are impossible or impractical to solve today," said Arvind Krishna, senior vice president and director of IBM Research, in a statement.
IBM's research was published in Wednesday's issue of the journal Nature Communications.
Excerpt from space.com
This article was originally published on The Conversation. The publication contributed this article to Space.com's Expert Voices: Op-Ed & Insights.
There’s real pressure on the aviation industry to introduce faster, cheaper and greener aircraft, while maintaining the high safety standards demanded of airlines worldwide.
Airlines carry more than three billion passengers each year, which presents an enormous challenge not only for aircraft manufacturers but for the civil aviation infrastructure that makes this extraordinary annual mass-migration possible. Many international airports are close to or already at capacity. The International Air Transport Association (IATA) has estimated that, without intervention, many global airports – including major hubs such as London Heathrow, Amsterdam Schiphol, Beijing and Dubai – will have run out of runway or terminal capacity by 2020.
The obvious approach to tackling this problem is to extend and enlarge airport runways and terminals – such as the long-proposed third runway at London Heathrow. However there may be other less conventional alternatives, such as introducing in-flight refuelling for civil aircraft on key long-haul routes. Our project, Research on a Cruiser-Enabled Air Transport Environment (Recreate), began in 2011 to evaluate whether this was something that could prove a viable, and far cheaper, solution.
If in-flight refuelling seems implausible, it’s worth remembering that it was first trialed in the 1920s, and the military has continued to develop the technology ever since. The appeal is partly to reduce the aircraft’s weight on take-off, allowing it to carry additional payload, and partly to extend its flight range. Notably, during the Falklands War in 1982 RAF Vulcan bombers used in-flight refuelling to stage what was at the time the longest bombing mission ever, flying 8,000 miles non-stop from Ascension Island in the South Atlantic to the Falklands and back.
Reducing take-off weight could offer many benefits for civilian aircraft too. Without the need to carry so much fuel the aircraft can be smaller, which means less noise on take-off and landing and shorter runways. This opens up the network of smaller regional airports as new potential sites for long-haul routes, relieving pressure on the major hubs that are straining at the seams.
There are environmental benefits too, as a smaller, lighter aircraft requires less fuel to reach its destination. Our initial estimates from air traffic simulations demonstrate that it’s possible to reduce fuel burn by up to 11% over today’s technology by simply replacing existing global long-haul flight routes with specifically designed 250-seater aircraft with a range of 6,000nm after one refuelling – roughly the distance from London to Hong Kong. This saving could potentially grow to 23% with further efficiencies, all while carrying the same number of passengers the same distance as is possible with the current aircraft fleet, and despite the additional fuel burn of the tanker aircraft.
Imagine if these Tornado fighter jets were 250-seater passenger aircraft and you’ve got the idea.
However, this is not the whole picture – in-flight refuelling will require the aerial equivalent of petrol stations in order to deliver keep passenger aircraft in the sky. With so much traffic it simply wouldn’t be possible to refuel any aircraft any time, anywhere it was needed. The location of these refuelling zones, coupled with the flight distance between the origin and destination airports can greatly affect the potential benefits achievable, possibly pulling flights away from their shortest route, and even making refuelling on some routes impossible – if for example the deviation to the nearest refuelling zone meant burning as much fuel as would have been saved.
Safety and automation
As with all new concepts – particularly those that involve bringing one aircraft packed with people and another full of fuel into close proximity during flight – it’s quite right to ask whether this is safe. To try and answer this question, the Dutch National Aerospace Laboratory and German Aerospace Centre used their flight simulators to test the automated in-flight refuelling flight control system developed as part of the Recreate project.One simulator replicated the manoeuvre from the point of view of the tanker equipped with an in-flight refuelling boom, the other simulated the aircraft being refuelled mid-flight. Critical test situations such as engine failure, high air turbulence and gusts of wind were simulated with real flight crews to assess the potential danger to the operation. The results were encouraging, demonstrating that the manoeuvre doesn’t place an excessive workload on the pilots, and that the concept is viable from a human as well as a technical perspective.
So far we’ve demonstrated the potential aerial refuelling holds for civilian aviation, but putting it into practice would still pose challenges. Refuelling hubs would need to be established worldwide, shared between airlines. There would need to be fundamental changes to airline pilot training, alongside a wider public acceptance of this departure from traditional flight operations.
However, it does demonstrate that, in addition to all the high-tech work going into designing new aircraft, new materials, new engines and new fuels, the technology we already have offers solutions to the long-term problems of ferrying billions of passengers by air around the world.
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