NASA fires-up jet fuel that tastes like chicken

…  NASA is checking out biofuel made from chicken and beef fat.

The chicken fat fuel, known as Hydrotreated Renewable Jet Fuel, was burned in the engine of a DC-8 at NASA’s Dryden Flight Research Center as part of its Alternative Aviation Fuels Experiment that is looking at developing all manner of biofuel alternatives to traditional Jet Propellant 8, or JP-8. The DC-8 is used as a test vehicle because its engine operations are well-documented and well-understood, NASA says.

The researchers measured the fuel’s performance in the engines and examined the engine exhaust for chemicals and contamination that could contribute to air pollution. According to NASA, it was the first test ever to measure biofuel emissions for nitrogen oxides (NOx) and tiny particles of soot or unburned hydrocarbon – both of which can degrade air quality in communities with airports. NOx contributes to smog and particulate matter contributes to respiratory and cardiovascular ailments.

NASA said that in the engine that burned the biofuel, black carbon emissions were 90% less at idle and almost 60% less at takeoff thrust. The biofuel also produced much lower sulfate, organic aerosol, and hazardous emissions than the standard jet fuel. Researchers will spend the next several months comparing the results and drawing conclusions, NASA said.

The Air Force too has been experimenting hydrotreated fuel. It has successfully flown a couple jets in its arsenal on 50-50 blends of Hydrotreated Renewable Jet fuel, or HRJ, and JP-8.

In the past the Air Force has stated it wants to fuel half its North American fleet with a synthetic-fuel blend by 2016. The Air Force is the single largest user of aviation fuel inside the Federal government, using an estimated 3 billion gallons per year, according to the Air Force. Each time the price of oil goes up $10 per barrel, it costs the Air Force an additional $600 million for fuel. …

via Layer 8: NASA fires-up jet fuel that tastes like chicken.

Time Was Never the 4th Dimension

Time is not the fourth dimension of spacetime, nor is it an absolute quantity that flows on its own, Slovenian researchers say. Instead, they propose that time is simply a measure denoting the numerical order of change.

This new theory is based on the fact that not even famed physicist Albert Einstein believed that time (t) was the fourth dimension. In other words, when we look at space, we shouldn’t see three dimensions (3D) plus time, but rather four dimensions (4D).

According to the new proposal, time can only be used to measure numerical order of material change, and not to explain other phenomena that go on in the material world. The new study was conducted by investigators at the Scientific Research Center Bistra (SRCB), in Ptuj.

By looking at the Universe from this perspective, the team argues, explaining quantum information transfers become a lot easier. A 4D space provides the best possible medium for such transfers.

One of the primary arguments in the new proposal is that time has absolutely no primary physical existence. It is, in fact, simply a mathematical value, that we use to measure the frequency and speed of an object.

In this respect, using t as the value of a X-axis on a graph is incorrect, since we cannot measure time itself. The idea is expanded on in two research papers, one of which was published in the journal Physics Essays. The other will appear in an upcoming issue of the same magazine.

The proposal basically calls for a paradigm shift in this area of research. The studies argue experts should regard spacetime as having four dimensions of space. The main implication of this is that the Universe is truly timeless, Daily Galaxy reports.

“Minkowski space is not 3D + T, it is 4D. … “This view corresponds better to the physical world and has more explanatory power in describing immediate physical phenomena: gravity, electrostatic interaction, information transfer,” they add.

“The idea of time being the fourth dimension of space did not bring much progress in physics and is in contradiction with the formalism of special relativity,” Sorli goes on to say.

“We are now developing a formalism of 3D quantum space based on Planck work. It seems that the Universe is 3D from the macro to the micro level to the Planck volume, which per formalism is 3D,” the investigator adds.

“In this 3D space there is no ‘length contraction,’ there is no ‘time dilation.’ What really exists is that the velocity of material change is ‘relative’ in the Einstein sense,” he concludes.

via Time Was Never the 4th Dimension – Softpedia.

Chemists fabricate ‘impossible’ material

When atoms combine to form compounds, they must follow certain bonding and valence rules. For this reason, many compounds simply cannot exist. But there are some compounds that, although they follow the bonding and valence rules, still are thought to not exist because they have unstable structures. Scientists call these compounds “impossible compounds.” Nevertheless, some of these impossible compounds have actually been fabricated (for example, single sheets of graphene were once considered impossible compounds). In a new study, scientists have synthesized another one of these impossible compounds — periodic mesoporous hydridosilica — which can transform into a photoluminescent material at high temperatures.

The researchers, led by Professor Geoffrey Ozin of the Chemistry Department at the University of Toronto, along with coauthors from institutions in Canada, China, Turkey, and Germany, have published their study in a recent issue of the Journal of the American Chemical Society.

Like graphene, periodic mesoporous hydridosilica (meso-HSiO1.5) consists of a honeycomb-like lattice structure. Theoretically, the structure should be so thermodynamically unstable that the mesopores (the holes in the honeycomb) should immediately collapse into a denser form, HSiO1.5, upon the removal of the template on which the material was synthesized.

In their study, the researchers synthesized the mesoporous material on an aqueous acid-catalyzed template. When they removed the template, they discovered that the impossible material remains stable up to 300 °C. The researchers attribute the stability to hydrogen bonding effects and steric effects, the latter of which are related to the distance between atoms. Together, these effects contribute to the material’s mechanical stability by making the mesopores resistant to collapse upon removal of the template.

“The prevailing view for more than 50 years in the massive field of micro-, meso-, or macroporous materials is that a four-coordinate, three-connected open framework material (called disrupted frameworks) should be thermodynamically unstable with respect to collapse of the porosity and therefore should not exist,” Ozin told PhysOrg.com. …

via Chemists fabricate ‘impossible’ material.

Development in fog harvesting process may make water available to the world’s poor

In the arid Namib Desert on the west coast of Africa, one type of beetle has found a distinctive way of surviving. When the morning fog rolls in, the Stenocara gracilipes species, also known as the Namib Beetle, collects water droplets on its bumpy back, then lets the moisture roll down into its mouth, allowing it to drink in an area devoid of flowing water.

What nature has developed, Shreerang Chhatre wants to refine, to help the world’s poor. Chhatre is an engineer and aspiring entrepreneur at MIT who works on fog harvesting, the deployment of devices that, like the beetle, attract water droplets and corral the runoff. This way, poor villagers could collect clean water near their homes, instead of spending hours carrying water from distant wells or streams. In pursuing the technical and financial sides of his project, Chhatre is simultaneously a doctoral candidate in chemical engineering at MIT; an MBA student at the MIT Sloan School of Management; and a fellow at MIT’s Legatum Center for Development and Entrepreneurship.

Access to water is a pressing global issue: the World Health Organization and UNICEF estimate that nearly 900 million people worldwide live without safe drinking water. The burden of finding and transporting that water falls heavily on women and children. “As a middle-class person, I think it’s terrible that the poor have to spend hours a day walking just to obtain a basic necessity,” Chhatre says.

A fog-harvesting device consists of a fence-like mesh panel, which attracts droplets, connected to receptacles into which water drips. Chhatre has co-authored published papers on the materials used in these devices, and believes he has improved their efficacy. “The technical component of my research is done,” Chhatre says. He is pursuing his work at MIT Sloan and the Legatum Center in order to develop a workable business plan for implementing fog-harvesting devices.

Interest in fog harvesting dates to the 1990s, and increased when new research on Stenocara gracilipes made a splash in 2001. A few technologists saw potential in the concept for people. One Canadian charitable organization, FogQuest, has tested projects in Chile and Guatemala.

Chhatre’s training as a chemical engineer has focused on the wettability of materials, their tendency to either absorb or repel liquids (think of a duck’s feathers, which repel water). …

One basic principle of a good fog-harvesting device is that it must have a combination of surfaces that attract and repel water. For instance, the shell of Stenocara gracilipes has bumps that attract water and troughs that repel it; this way, drops collects on the bumps, then run off through the troughs without being absorbed, so that the water reaches the beetle’s mouth.

To build fog-harvesting devices that work on a human scale, Chhatre says, “The idea is to use the design principles we developed and extend them to this problem.”

To build larger fog harvesters, researchers generally use mesh, rather than a solid surface like a beetle’s shell, because a completely impermeable object creates wind currents that will drag water droplets away from it. In this sense, the beetle’s physiology is an inspiration for human fog harvesting, not a template. “We tried to replicate what the beetle has, but found this kind of open permeable surface is better,” Chhatre says. “The beetle only needs to drink a few micro-liters of water. We want to capture as large a quantity as possible.” …

via Development in fog harvesting process may make water available to the world’s poor.

The Mystery of an Ancient Global Warming Recovery

The Earth may be able to recover from rising carbon dioxide emissions faster than previously thought, according to evidence from a prehistoric event analyzed by a Purdue University-led team.

When faced with high levels of atmospheric carbon dioxide and rising temperatures 56 million years ago, the Earth increased its ability to pull carbon from the air. This led to a recovery that was quicker than anticipated by many models of the carbon cycle – though still on the order of tens of thousands of years, said Gabriel Bowen, the associate professor of earth and atmospheric sciences who led the study.

“We found that more than half of the added carbon dioxide was pulled from the atmosphere within 30,000 to 40,000 years, which is one-third of the time span previously thought,” said Bowen, who also is a member of the Purdue Climate Change Research Center. “We still don’t know exactly where this carbon went, but the evidence suggests it was a much more dynamic response than traditional models represent.”

… Plants prefer carbon-12 during photosynthesis, and when they accelerate their uptake of carbon dioxide it shifts the carbon isotope ratio in the atmosphere. This shift is then reflected in the carbon isotopes present in rock minerals formed by reactions involving atmospheric carbon dioxide, Bowen said.

“The rate of the carbon isotope change in rock minerals tells us how rapidly the carbon dioxide was pulled from the atmosphere,” he said. “We can see the fluxes of carbon dioxide in to and out of the atmosphere. At the beginning of the event we see a shift indicating that a lot of organic-derived carbon dioxide had been added to the atmosphere, and at the end of the event we see a shift indicating that a lot of carbon dioxide was taken up as organic carbon and thus removed from the atmosphere.”

A paper detailing the team’s National Science Foundation-funded work was published in Nature Geoscience.

via The Mystery of an Ancient Global Warming Recovery.

How meditation might ward off the effects of ageing

… Visitors here to the Shambhala Mountain Centre meditate in silence for up to 10 hours every day, emulating the lifestyle that monks have chosen for centuries in mountain refuges from India to Japan. But is it doing them any good? For two three-month retreats held in 2007, this haven for the eastern spiritual tradition opened its doors to western science. As attendees pondered the “four immeasurables” of love, compassion, joy and equanimity, a laboratory squeezed into the basement bristled with scientific equipment from brain and heart monitors to video cameras and centrifuges. The aim: to find out exactly what happens to people who meditate.

After several years of number-crunching, data from the so-called Shamatha project is finally starting to be published. So far the research has shown some not hugely surprising psychological and cognitive changes – improvements in perception and wellbeing, for example. But one result in particular has potentially stunning implications: that by protecting caps called telomeres on the ends of our chromosomes, meditation might help to delay the process of ageing. …

Scientists from a range of fields are starting to compile evidence that rather than simply being a transient mental or spiritual experience, meditation may have long-term implications for physical health.

There are many kinds of meditation, including transcendental meditation, in which you focus on a repetitive mantra, and compassion meditation, which involves extending feelings of love and kindness to fellow living beings. One of the most studied practices is based on the Buddhist concept of mindfulness, or being aware of your own thoughts and surroundings. Buddhists believe it alleviates suffering by making you less caught up in everyday stresses – helping you to appreciate the present instead of continually worrying about the past or planning for the future.

“You pay attention to your own breath,” explains Sara Lazar, a neuroscientist who studies the effects of meditation at Massachusetts general hospital in Boston. “If your mind wanders, you don’t get discouraged, you notice the thought and think, ‘OK’.”

Small trials have suggested that such meditation creates more than spiritual calm. Reported physical effects include lowering blood pressure, helping psoriasis to heal, and boosting the immune response in vaccine recipients and cancer patients. In a pilot study in 2008, Willem Kuyken, head of the Mood Disorders Centre at Exeter University, showed that mindfulness meditation was more effective than drug treatment in preventing relapse in patients with recurrent depression. And in 2009, David Creswell of Carnegie Mellon University in Pittsburgh found that it slowed disease progression in patients with HIV.

Most of these trials have involved short courses of meditation aimed at treating specific conditions. The Shamatha project, by contrast, is an attempt to see what a longer, more intensive course of meditation might do for healthy people. The project was co-ordinated by neuroscientist Clifford Saron of the Centre for Mind and Brain at the University of California, Davis. His team advertised in Buddhist publications for people willing to spend three months in an intensive meditation retreat, and chose 60 participants. Half of them attended in the spring of 2007, while the other half acted as a control group before heading off for their own retreat in the autumn. …

They found that at the end of the retreat, meditators had significantly higher telomerase activity than the control group, suggesting that their telomeres were better protected.  The researchers are cautious, but say that in theory this might slow or even reverse cellular ageing. “If the increase in telomerase is sustained long enough,” says Epel, “it’s logical to infer that this group would develop more stable and possibly longer telomeres over time.” …

via How meditation might ward off the effects of ageing | Life and style | The Observer.

The Brain’s Time Sense

… “brain time,” as Eagleman calls it, is intrinsically subjective. “Try this exercise,” he suggests in a recent essay. “Put this book down and go look in a mirror. Now move your eyes back and forth, so that you’re looking at your left eye, then at your right eye, then at your left eye again. When your eyes shift from one position to the other, they take time to move and land on the other location. But here’s the kicker: you never see your eyes move.” There’s no evidence of any gaps in your perception—no darkened stretches like bits of blank film—yet much of what you see has been edited out. Your brain has taken a complicated scene of eyes darting back and forth and recut it as a simple one: your eyes stare straight ahead. Where did the missing moments go?

The question raises a fundamental issue of consciousness: how much of what we perceive exists outside of us and how much is a product of our minds? Time is a dimension like any other, fixed and defined down to its tiniest increments: millennia to microseconds, aeons to quartz oscillations. Yet the data rarely matches our reality. The rapid eye movements in the mirror, known as saccades, aren’t the only things that get edited out. The jittery camera shake of everyday vision is similarly smoothed over, and our memories are often radically revised. What else are we missing? When Eagleman was a boy, his favorite joke had a turtle walking into a sheriff’s office. “I’ve just been attacked by three snails!” he shouts. “Tell me what happened,” the sheriff replies. The turtle shakes his head: “I don’t know, it all happened so fast.”

A few years ago, Eagleman thought back on his fall from the roof and decided that it posed an interesting research question. Why does time slow down when we fear for our lives? Does the brain shift gears for a few suspended seconds and perceive the world at half speed, or is some other mechanism at work?

via David Eagleman and Mysteries of the Brain : The New Yorker.

YouTube – How the 2011 Japan tsunami happened

YouTube – How the 2011 Japan tsunami happened.

Tiny church finds original King James Bible

A little English village church has just made a remarkable discovery.

The ornate old Bible that had been sitting in plain view on a table near the last row of pews for longer than anyone could remember is an original King James Bible – one of perhaps 200 surviving 400-year-old original editions of arguably the most important book ever printed in English.

In fact, the Bible at St. Laurence Church in Hilmarton, England, was sitting right under a hand-lettered sign saying it was an original.

The sign said it had been found in “the parish chest” in 1857, that the cover had been added, and that it was the second of the two impressions published in 1611 – the year of first publication.

But no one knew whether to believe it, parish council member Geoff Procter said. As the anniversary of publication in 1611 approached, they decided it was worth investigating.

“We had no way of knowing whether it really was a 1611 Bible so we had to get it verified somehow,” he said.

He and two other church members took it to a specialist, the Rev. David Smith at the Museum of the Book in London.

Smith knew immediately what he was looking at, Procter said.

“We put it on his table and he opened it and immediately he said, ‘Yes, this is a 1611 Bible,’” Procter remembered. …

via Tiny church finds original King James Bible – CNN Belief Blog – CNN.com Blogs.

Saturn linked to icy moon Enceladus via beam of electrons

Saturn is linked to its moon Encleadus by powerful electrical currents with beams of electrons flowing back and forth between the two cosmic bodies, scientists revealed today.

The discovery was made using instruments on board NASA’s Cassini spacecraft that arrived at Saturn in 2004.

Scientists have long been intrigued by Enceladus, which orbits 112,000 miles above Saturn.

Cassini spotted ice volcanoes erupting from the surface of the moon in 2005 and scientists believe this could be evidence of a massive underground ocean.

The craft has passed the 310mile-wide moon 14 times since it arrived, gradually unlocking its secrets.

Scientists studying resulting data have found that the jets of gas and icy grains emitted from the south pole of Enceladus, form an ionsphere when they become electrically charged.

This has led to the discovery of a new current system, caused by a dynamo effect, due to the motion of Enceladus and its ionsphere passing through the magnetic bubble that surrounds Saturn.

Jupiter has a similar current system that links it to at least three of its moons. Satellites orbit inside its magnetosphere – its giant magnetic bubble – forming the flowing spots that appear in the planet’s upper atmosphere. …

via Saturn linked to icy moon Enceladus via beam of electrons | Mail Online.