Thursday, October 30, 2014
Sunday, October 26, 2014
Fwd: 45,000 year old genome
'Scientists have reconstructed the genome of a man who lived 45,000 years ago, by far the oldest genetic record ever obtained from modern humans. The research, published on Wednesday in the journal Nature, provided new clues to the expansion of modern humans from Africa about 60,000 years ago, when they moved into Europe and Asia.
And the genome, extracted from a fossil thighbone found in Siberia, added strong support to a provocative hypothesis: Early humans interbred with Neanderthals.
http://www.nytimes.com/2014/10/23/science/research-humans-interbred-with-neanderthals.html?_r=0
Monday, October 13, 2014
Fwd: Antarctic Volcanos
'A string of a dozen volcanoes, at least several of them active, has been found beneath the frigid seas near Antarctica, the first such discovery in that region.
Some of the peaks tower nearly 10,000 feet (3,000 meters) above the ocean floor — nearly tall enough to break the water's surface.
"That's a big volcano. That's a very big volcano. If that was on land it would be quite remarkable," said Philip Leat, a vulcanologist with the British Antarctic Survey who led a seafloor mapping expedition'
http://www.livescience.com/15006-underwater-volcanoes-discovered-antarctica.html
Fwd: Ebola
Technologies like this allow us to imagine a new form of quarantine. Rather than relying on primitive instruments, indiscriminate profiling or questionnaires, we should consider running a pilot program to test asymptomatic travelers using sensitive P.C.R.-based techniques. Obviously, such technologies are expensive, but the cost is not prohibitive. A typical P.C.R. reaction, including labor, costs between $60 and $200 (we have already spent 100 times more disposing of the contaminated sheets from the home Mr. Duncan stayed in). Since the test takes about a third of the time of a trans-Atlantic flight, the flight would become the quarantine.
Huge logistical questions would need to be solved. Where would such a screening test be administered — before departure from West Africa, or upon landing? Could we imagine a walking quarantine in which travelers were granted provisional entry, but recalled if they tested positive? What infection precautions would need to be in place for such testing? What forms of consent would be required? Who would bear the costs? Who exactly would be tested?'
http://www.nytimes.com/2014/10/13/opinion/how-to-quarantine-against-ebola.html?_r=0
Fwd: Much faster LEDS
'Duke University researchers have made fluorescent molecules emit photons of light 1,000 times faster than with previous designs — a speed record, and a step toward realizing superfast light-emitting diodes (LEDs) for nanophotonic devices, such as telecommunication lasers and as single-photon sources for quantum cryptography.
http://www.kurzweilai.net/high-speed-fluorescence-for-1000-times-faster-leds
Saturday, October 11, 2014
Friday, October 10, 2014
Fwd: Left and Right turns for light
'How can a beam of light tell the difference between left and right? Tiny particles have now been coupled to a glass fiber. The particles emit light into the fiber in such a way that it does not travel in both directions, as one would expect. Instead, the light can be directed either to the left or to the right. This has become possible by employing a remarkable physical effect – the spin-orbit coupling of light. This new kind of optical switch has the potential to revolutionize nanophotonics.'
http://www.sciencedaily.com/releases/2014/10/141006084915.htm
Looks like a Diode for light
Best wishes,
John Coffey
http://www.entertainmentjourney.com
Thursday, October 9, 2014
Fwd: Affordable Fusion
'Fusion energy almost sounds too good to be true -- zero greenhouse gas emissions, no long-lived radioactive waste, a nearly unlimited fuel supply.
Perhaps the biggest roadblock to adopting fusion energy is that the economics haven't penciled out. Fusion power designs aren't cheap enough to outperform systems that use fossil fuels such as coal and natural gas.
University of Washington engineers hope to change that. They have designed a concept for a fusion reactor that, when scaled up to the size of a large electrical power plant, would rival costs for a new coal-fired plant with similar electrical output.
http://www.sciencedaily.com/releases/2014/10/141008131156.htm
Monday, October 6, 2014
Fwd: Cerebellum
'A new study published in the Cell Press journal Current Biology on October 2 could rewrite the story of ape and human brain evolution. While the neocortex of the brain has been called "the crowning achievement of evolution and the biological substrate of human mental prowess," newly reported evolutionary rate comparisons show that the cerebellum expanded up to six times faster than anticipated throughout the evolution of apes, including humans.
http://www.sciencedaily.com/releases/2014/10/141002123629.htm
Wednesday, October 1, 2014
This Physicist Says She Has Proof Black Holes Simply Don't Exist
The problem is that we have pretty good evidence that black holes do
exist. If they don't exist then we have some explaining to do.
Years ago I saw how a few scientific dissenters theorized that black
holes were really just neutron stars, which is kind of like "black
hole-lite". However neutron stars couldn't account for the evidence
of billion solar mass black holes at the center of every galaxy.
John Coffey
Monday, September 29, 2014
Turning Algae into oil
'We think it is a really elegant solution," said Matt Atwood, the chief executive. At its heart is a "hydrothermal liquefaction" system that heats the algae and other solids in the sewage to more than 550 degrees Fahrenheit, at 3,000 pounds per square inch, turning out a liquid that resembles crude oil from a well.
The company sent the liquid to Auburn University, where scientists added hydrogen (a common step in oil refining) to produce diesel fuel. An independent laboratory, Intertek, confirmed that the diesel fuel met industry specifications. The thermal processing has caught the attention of independent scientists. The Department of Energy recently awarded a $4 million grant to a partnership led by SRI International for further work on Algae Systems' hydrothermal processing system…
Some companies have tried gene-altered algae, but Algae Systems uses naturally occurring forms drawn from the bay. Whichever strain flourishes in the bags is what the company uses. "We call it the Hunger Games," Mr. Atwood said.
The early results were promising enough for IHI, a Japanese conglomerate, to invest $15 million.'
http://www.nytimes.com/2014/08/19/science/not-letting-algae-just-float-around.html?_r=0
Friday, September 26, 2014
India/Mars
'This is a mission that has been budgeted at 4.5bn rupees ($74m), which, by Western standards, is staggeringly cheap.
The American Maven orbiter that arrived at the Red Planet on Monday is costing almost 10 times as much.
Back in June, Indian Prime Minister Narendra Modi even quipped that India's real-life Martian adventure was costing less than the make-believe Hollywood film Gravity.'
http://www.bbc.com/news/science-environment-29341850
Thursday, September 25, 2014
Fwd: Water vapor exoplanet
'Astronomers have detected water vapour in the atmosphere of a planet that orbits a star far beyond our solar system.
Observations of the Neptune-sized planet, which lies 120 light years from Earth in the constellation of Cygnus, revealed that its atmosphere was mostly hydrogen with around 25% made up from water vapour.
Until now, researchers have been frustrated in their efforts to study the atmospheres of planets much smaller than Jupiter because their skies were thick with clouds. The problem was so persistent that astronomers had begun to think that all warm, small planets formed with substantial cloud cover.
But writing in the journal Nature, scientists in the US describe how they found a Neptune-sized planet with cloud-free skies, enabling them to make detailed measurements of a small planet's atmosphere for the first time.
The planet, named HAT-P-11b, is about four times the diameter of Earth. It orbits so close to its star that surface temperatures reach more than 600C and a year passes in five Earth days. Like our own Neptune, the planet lacks a rocky surface – it's a ball of gas – and is thought to be lifeless'
http://www.theguardian.com/science/2014/sep/24/water-small-warm-planet-atmosphere
Monday, September 22, 2014
Sunday, September 21, 2014
Friday, September 19, 2014
Thursday, September 18, 2014
Wednesday, September 17, 2014
Sunday, September 14, 2014
Friday, August 29, 2014
This is too good not to share.
Friday, August 22, 2014
Fwd: Diabetes
'Researchers have developed a way to use a laser to measure people's blood sugar, and, with more work to shrink the laser system to a portable size, the technique could allow diabetics to check their condition without pricking themselves to draw blood. In a new article, the researchers describe how they measured blood sugar by directing their specialized laser at a person's palm.'
http://www.sciencedaily.com/releases/2014/08/140821141610.htm
... We live in interesting times.
Sunday, August 10, 2014
Fwd: IBM brain-like processor
Big Blue released a research paper describing the latest fruits of
these labors. With this paper, published in the academic journal
Science, the company unveils what it calls TrueNorth, a custom-made
"brain-like" chip that builds on a simpler experimental system the
company released in 2011.
TrueNorth comes packed with 4,096 processor cores, and it mimics one
million human neurons and 256 million synapses, two of the fundamental
biological building blocks that make up the human brain. IBM calls
these "spiking neurons." What that means, essentially, is that the
chip can encode data as patterns of pulses, which is similar to one
of the many ways neuroscientists think the brain stores information.'
http://www.wired.com/2014/08/ibm-unveils-a-brain-like-chip-with-4000-processor-cores/?mbid=social_twitter
Saturday, August 9, 2014
Thursday, August 7, 2014
ALS
Although respiratory support can ease problems with breathing and prolong survival, it does not affect the progression of ALS. Most people with ALS die from respiratory failure, usually within three to five years from the onset of symptoms. The median survival time from onset to death is around 39 months, and only 4% survive longer than 10 years. Physicist Stephen Hawking has lived with the disease for more than 50 years, though he is an unusual case.
http://en.wikipedia.org/wiki/Amyotrophic_lateral_sclerosis