Tuesday, May 5, 2009
Internet Struggles To Contain Carbon Footprint
From The Telegraph:
Internet companies are struggling to control their carbon footprint as the web consumes more energy and money.
With more than 1.5 billion people online around the round, scientists estimate the carbon footprint of the internet is growing by more than 10 per cent each year.
Many internet companies are struggling to manage the costs as energy bills soar, while their advertising revenues come under pressure from the recession.
It is thought one site facing problems is video website YouTube. Although now the world's third-biggest website, it requires a heavy subsidy from Google, its owner.
Recent analysis by Credit Suisse suggest it could lose as much as £317m this year.
Read more ....
Poison Bacteria Set Up Worst Extinction
In the three to four million years before the Permian-Triassic extinction, illustrated here, the seas were already oxygen-starved, according to a new study. The stagnant depths were a haven for bacteria that belched poison that crippled life on Earth, leaving it vulnerable to the volcanic knockout punch that would soon come. Lunar and Planetary InstituteFrom MSNBC:
New finding gets to heart of a long debate among extinction researchers.
In the ancient oceans, stagnant depths harbored poison-belching bacteria that crippled life on Earth, leaving it vulnerable to a knockout punch from volcanic eruptions, according to a new study.
Three to four million years before the Permian-Triassic extinction, also known as the Great Dying, the seas were already becoming oxygen-starved and sour, said the study in the journal Earth and Planetary Science Letters.
Changqun Cao of the Chinese Academy of Sciences in Nanjing and a team of researchers studied rock samples drilled in central China from the late Permian and early Triassic periods. Rocks from the extinction itself date to 252.2 million years ago, and show several chemical signs of catastrophe.
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Unknown Internet 6: Where Are The Net's Dark Corners?
Photo: Some websites will leave your computer infected with viruses or worms, but the "black holes" are just as bad (Image: Image Source / Rex)From New Scientist:
There are plenty of places online that you would do well to steer clear of. A brief visit to some unsavoury websites, for instance, could leave your computer infected with worms or viruses. Then there are the "black holes" to worry about.
If your emails mysteriously disappear, or your favourite website is suddenly unobtainable, you might have run into one. Though nowhere near as destructive as their cosmological cousins, information black holes can create all kinds of problems for surfers. Essentially they are points on the network at which data packets simply disappear due to broken connections, say, or misconfigured routers - devices that maintain lists of addresses and which help direct internet traffic. A team including computer scientist Ethan Katz-Bassett at the University of Washington in Seattle has detected almost 1.5 million black holes since it began looking in 2007. The majority persist for over 2 hours, he says. Unfortunately it is tough to predict where they will appear next, so it's hard for the average surfer to avoid them.
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How To Grow New Organs
Image: "Microfabrication Of Three-Dimensional Engineered Scaffolds," By Jeffrey T. Borenstein, Eli J. Weinberg, Brian K. Orrick, Cathryn Sundback, Mohammad R. Kaazempur-Mofrad And Joseph P. Vacanti, In TISSUE ENGINEERING, Vol. 13, No. 8; 2007 From Scientific American:
Pioneers in building living tissue report important advances over the past decade.
Key Concepts
* Efforts to build living tissue replacements have progressed over the past decade, and some simple engineered tissues are already used in humans.
* Advances have come from a greater understanding of cell behavior and sophisticated new building materials.
* More tissue-engineered products are close to commercial readiness but must undergo the complex regulatory scrutiny given to living materials.
Read more ....
A Potential Breakthrough In Harnessing the Sun’s Energy
From environment360:
New solar thermal technology overcomes a major challenge facing solar power – how to store the sun’s heat for use at night or on a rainy day. As researchers tout its promise, solar thermal plants are under construction or planned from Spain to Australia to the American Southwest.
In the high desert of southern Spain, not far from Granada, the Mediterranean sun bounces off large arrays of precisely curved mirrors that cover an area as large as 70 soccer fields. These parabolic troughs follow the arc of the sun as it moves across the sky, concentrating the sun’s rays onto pipes filled with a synthetic oil that can be heated to 750 degrees Fahrenheit. That super-heated oil is used to boil water to power steam turbines, or to pump excess heat into vats of salts, turning them a molten, lava-like consistency.
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Monday, May 4, 2009
The Space Giant Is Coming
From The BBC:The most distant cosmic explosion ever recorded would have made a fascinating target for the James Webb Space Telescope (JWST), according to scientists now building the successor to the Hubble Space Telescope.
The cataclysmic detonation reported this week is the most far-flung object in the Universe yet seen.
It was a class of celestial object known as a gamma-ray blast. At a distance of 13 billion light-years, the blast was so remote that today's telescopes were stretched to their limits in revealing much information about it.
Nasa's James Webb is designed with the purpose of imaging and studying this realm of the cosmos - and beyond - in extraordinary detail.
It is scheduled for launch in 2013.
Read more ....
The Missing Sunspots: Is This The Big Chill?
The disappearance of sunspots happens every few years, but this time it's gone on far longer than anyone expected - and there is no sign of the Sun waking up. AFPFrom The Independent:
Scientists are baffled by what they’re seeing on the Sun’s surface – nothing at all. And this lack of activity could have a major impact on global warming. David Whitehouse investigates
Could the Sun play a greater role in recent climate change than has been believed? Climatologists had dismissed the idea and some solar scientists have been reticent about it because of its connections with those who those who deny climate change. But now the speculation has grown louder because of what is happening to our Sun. No living scientist has seen it behave this way. There are no sunspots.
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Super-sensors To Discover What Happened In First Trillionth Of A Second After Big Bang
The cosmic microwave temperature fluctuations from the 5-year WMAP data seen over the full sky. The average temperature is 2.725 Kelvin (degrees above absolute zero; equivalent to -270 C or -455 F), and the colors represent the tiny temperature fluctuations, as in a weather map. Red regions are warmer and blue regions are colder by about 0.0002 degrees. (Credit: NASA / WMAP Science Team)From The Science Daily:
ScienceDaily (May 4, 2009) — What happened in the first trillionth of a trillionth of a trillionth of a second after the Big Bang?
Super-sensitive microwave detectors, built at the National Institute of Standards and Technology (NIST), may soon help scientists find out.
The new sensors, described May 2 at the American Physical Society (APS) meeting in Denver, were made for a potentially ground-breaking experiment* by a collaboration involving NIST, Princeton University, the University of Colorado at Boulder, and the University of Chicago.
Read more ....
Why Are Humans Always So Sick?
Super-hygiene, sedentary lifestyles, and a lack of worms in our stomachs may all contribute to modern ills, scientists theorize. Image Credit: DreamstimeFrom Live Science:
The swine flu outbreak this spring is just the latest in the mountain of ailments that seem to beset humanity, from the incurable common cold to each potentially deadly cancer diagnosed at the rate of every 30 seconds in the United States.
So is our species sicker than it has ever been? Or is our current lot far better than it used to be?
It turns out the answer to both questions might be yes. While humans as a whole do live longer than ever before, we now suffer certain illnesses to a degree never seen in the past — including skyrocketing rates of diabetes and obesity and, surprisingly, ailments such as hay fever.
Read more ....
Wind Farm's Radar System Stops Birds Getting The Chop
From The Guardian:
Texas claims world first in using Nasa technology to spare migrating species.
It could be considered an air traffic control system for birds who have flown perilously off course. A wind farm in southern Texas, situated on a flight path used by millions of birds each autumn and spring, is pioneering the use of radar technology to avoid deadly collisions between a 2,500lb rotating blade and bird.
US wind farms kill about 7,000 birds a year, according to a recent study. Other studies of individual wind farms suggest a higher toll on bats and birds, which crash into towers, blades, power lines and other installations. Estimates from a single wind farm in Altamont, California showed as many as 1,300 birds of prey killed each year – or about three a day.
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Ocean Power Surges Forward
Photo: Courtesy of Ocean Power Technologies IncFrom The Christian Science Monitor:
Wave power and tidal power are still experimental, but may be little more than five years away from commercial development.
Three miles off the craggy, wave-crashing coastline near Humboldt Bay, Calif., deep ocean swells roll through a swath of ocean that is soon to be the site of the nation’s first major wave-power project.
Like other renewable energy technology, ocean power generated by waves, tidal currents, or steady offshore winds has been considered full of promise yet perennially years from reaching full-blown commercial development.
Read more ....
Ancient Tsunami 'Hit New York'
From The BBC:
A huge wave crashed into the New York City region 2,300 years ago, dumping sediment and shells across Long Island and New Jersey and casting wood debris far up the Hudson River.
The scenario, proposed by scientists, is undergoing further examination to verify radiocarbon dates and to rule out other causes of the upheaval.
Sedimentary deposits from more than 20 cores in New York and New Jersey indicate that some sort of violent force swept the Northeast coastal region in 300BC.
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American Epidemics, a Brief History
(Click the Above Image to Enlarge)From The New York Times:
ALL epidemics are different in their own way, and the current swine flu outbreak — which by Friday had sickened 141 people in 19 states, and caused deaths and illness in Mexico and 13 other countries — is no exception. Yet, as you can see from the chart below, which provides details on a selected handful of epidemics in American history, all outbreaks share certain themes. While some of these events killed many thousands and others affected only a few, in each case public health officials felt a grave threat was imminent and did what they could using the science of the day.
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Sunday, May 3, 2009
Meet The Ancestors: DNA Study Pinpoints Namibia As Home To The World's Most Ancient Race
The San people, hunter-gatherers in south-west Africa for thousands of years, are believed to be the oldest population of humans on EarthFrom The Daily Mail:
Scientists have long known that humans originated in Africa, but now a groundbreaking DNA study has revealed our 'Garden of Eden' is likely to be on the South African-Namibian border.
For it is the San people, hunter-gatherers in this area for thousands of years, who researchers now believe are the oldest human population on Earth.
They are descended from the earliest human ancestors from which all other groups of Africans stem and, in turn, to the people who left the continent to populate other corners of the planet.
Read more ....
Russia To Build Floating Arctic Nuclear Stations
Oil and gas in the Arctic are seen as ripe for exploitation by the Russian energy industry. Photograph: Hans Strand/ Hans Strand/CorbisFrom The Guardian:
Environmentalists fear pollution risk as firms try to exploit ocean's untapped oil and gas reserves.
Russia is planning a fleet of floating and submersible nuclear power stations to exploit Arctic oil and gas reserves, causing widespread alarm among environmentalists.
A prototype floating nuclear power station being constructed at the SevMash shipyard in Severodvinsk is due to be completed next year. Agreement to build a further four was reached between the Russian state nuclear corporation, Rosatom, and the northern Siberian republic of Yakutiya in February.
Read more ....
Unknown Internet 5: Is There Only One Internet?
The internet is a disparate mix of interconnected computers, united by communication languages (Image: Image Source / Rex)From New Scientist:
Probably - for now. The internet is a disparate mix of interconnected computers, many of them on large networks run by universities, businesses and so on. What unites this network of networks are the communication languages known as the Transmission Control Protocol and the Internet Protocol, collectively TCP/IP.
There are also a few large networks that use different protocols and which remain largely isolated from the internet, including something called FidoNet, which links bulletin board systems via the global telephone network, as well as a handful of military networks. The main internet is the only one of any significant size, as far as we know.
Read more ....
The Island Where People Live Longer
The island of Icaria could be the newest of the world's so-called blue zones — places where residents have unusually long life spans. AARPFrom NPR:
Making it to 90 years old is awe-inspiring in much of the world. But on a tiny Greek island in the North Aegean Sea, nonagenarians barely merit a second glance.
The island of Icaria could be the newest of the world's so-called blue zones — places where residents have unusually long life spans.
Dan Buettner has crossed the globe many times over the years in search of blue zones, and he recently teamed up with AARP and National Geographic to study Icaria.
Read more ....
Satellite Images Used To Create Better Camouflage
Images gathered from cameras on drones and satellites are used to make a mesh that serves as camouflage for military vehicles. The product, Photo-Veil is from Military Wraps.From Live Science:
The art of concealing troops and their vehicles has come a long way from the first "camouflage" division formed in France in 1915. The French army called in artists to help prepare colors and designs; the Americans later used the same idea, calling on artists like Grant Wood, the painter of the "American Gothic."
Today, Photo-Veil from Military Wraps is a mesh material that uses images gathered from cameras on drones and satellites to camouflage military vehicles. The lightweight, customizable, foldable, portable and waterproof mesh material is also able to mask thermal and infrared output, making it ideal for blinds and ghillie suits. (At least until your invisibility cloak is ready.)
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World's Fastest Camera Relies On Entirely New Type Of Imaging
Image: Researchers have developed a novel, continuously running camera that captures images roughly a thousand times faster than any existing conventional camera. (Credit: Image courtesy of UCLA / Henry Samueli School of Engineering and Applied Science)From Science Daily:
ScienceDaily (May 3, 2009) — Ultrafast, light-sensitive video cameras are needed for observing high-speed events such as shockwaves, communication between living cells, neural activity, laser surgery and elements of blood analysis. To catch such elusive moments, a camera must be able to capture millions or billions of images continuously with a very high frame rate. Conventional cameras are simply not up to the task.
Now, researchers at the UCLA Henry Samueli School of Engineering and Applied Science have developed a novel, continuously running camera that captures images roughly a thousand times faster than any existing conventional camera.
Read more ....
An Invention That Could Change The Internet For Ever
From The Independent:Revolutionary new web software could put giants such as Google in the shade when it comes out later this month. Andrew Johnson reports
The biggest internet revolution for a generation will be unveiled this month with the launch of software that will understand questions and give specific, tailored answers in a way that the web has never managed before.
The new system, Wolfram Alpha, showcased at Harvard University in the US last week, takes the first step towards what many consider to be the internet's Holy Grail – a global store of information that understands and responds to ordinary language in the same way a person does.
Although the system is still new, it has already produced massive interest and excitement among technology pundits and internet watchers.
Read more ....
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