Tuesday, September 16, 2008

Delaware Offshore Wind Farm Pattern For Future?


From Future Pundit:

A New York Times article on the politics of wind power looks at the long fight for political approval for an offshore wind power project off the coast of Delaware. The Mid-Atlantic Bight region has large quantities of fairly stable wind power.

The amount of power Dhanju was describing, Mandelstam knew from Kempton, was but a small fraction of an even larger resource along what’s known as the Mid-Atlantic Bight. This coastal region running from Massachusetts to North Carolina contained up to 330,000 megawatts of average electrical capacity. This was, in other words, an amount of guaranteed, bankable power that was larger, in terms of energy equivalence, than the entire mid-Atlantic coast’s total energy demand — not just for electricity but for heating, for gasoline, for diesel and for natural gas. Indeed the wind off the mid-Atlantic represented a full third of the Department of Energy’s estimate of the total American offshore resource of 900,000 megawatts.

Wind projects do not usually operate at nameplate (i.e. max) capacity for most of the time. An onshore wind project might average one third of max output. But wind offshore blows more consistently. I would like to know what average capacity utilization is expected for this Delaware project. I would also like to know how vulnerable a project like this is to a category 3 or 4 hurricane.

Read more ....

Monday, September 15, 2008

Popular Hallucinogen Faces Growing Legal Opposition In U.S.

Nathan K. calls his use of salvia "just a very gentle letting go, a very gentle relaxing." (Brandon Thibodeaux for The New York Times)

From The International Herald Tribune:

DALLAS: With a friend videotaping, 27-year-old Christopher Lenzini of Dallas took a hit of Salvia divinorum, the world's most potent hallucinogenic herb, and soon began to imagine, he said, that he was in a boat with little green men.

Lenzini quickly collapsed to the floor and dissolved into convulsive laughter.

When he posted the video on YouTube this summer, friends could not get enough. "It's just funny to see a friend act like a total idiot," he said, "so everybody loved it."

Until a decade ago, the use of salvia was largely limited to those seeking revelation under the tutelage of Mazatec shamans in its native Oaxaca, Mexico. Today, this mind-altering member of the mint family is broadly available for lawful sale online and in head shops across the United States.

Read more ....

Health Officials Fear Spread Of Lung-Destroying Pneumonia

From The L.A. Times:

Deaths from the combination of a skin infection and the common flu have increased, authorities say.


Health authorities have detected the emergence of a rare but deadly lung-destroying form of pneumonia, sparked by the combination of a skin infection and the common flu.

The national Centers for Disease Control and Prevention reported 22 deaths among children last year from the dual infection.

Numbers from the 2007-2008 flu season won't be released until next month, but officials say deaths have increased. The CDC has just begun tracking cases among all age groups.

The number of fatalities, though low, is a sharp increase from previous years, and infectious disease experts worry that an ongoing epidemic of skin infections could drive the numbers higher.

The double infection has appeared before: It was the leading cause of bacterial pneumonia deaths during the 1957-1958 flu pandemic, which killed 2 million people worldwide, including about 70,000 in the U.S.

Read more ....

Internet Users Need Help To Separate Fact From Fiction As Web Is Full Of Lies, Says Its Inventor

Sir Tim Berners-Lee believes the web spreads too much disinformation

From The Daily Mail:

The internet spreads too much disinformation and needs to be labelled in a way that will help users separate science fact from fiction, the creator of the World Wide Web said.

Sir Tim Berners-Lee sent the first successful communication between an http client and server via the internet in 1990. Now there are more than a 100 million websites in operation.

'One of the things I always remain concerned about is that that medium remains neutral,' the acclaimed British scientist said.

'It's not just where I go to decide where to buy my shoes which is the commercial incentive - it's where I go to decide who I'm going to trust to vote.

'It's where I go maybe to decide what sort of religion I'm going to belong to or not belong to; it's where I go to decide what is actual scientific truth - what I'm actually going to go along with and what is bunkum,' he told BBC News.

Sir Tim was speaking ahead of the launch of a website vetting Foundation he has helped create, which will brand sites it finds to be trustworthy sources of information.

Read more ....

Astronomers Capture Image Of Alien Planet Orbiting A 'Sun'

From The Telegraph:

Astronomers believe they have captured the first picture of an alien planet in orbit around a star that is similar to our own Sun.

Images of a young star and what is thought to be its companion planet have been taken by astronomers using the Gemini North telescope on Mauna Kea in Hawaii.

However they are puzzelled by the distance between the two.

Located around 500 light-years from Earth, the planet in the snapshot is around eight times bigger than Jupiter, the biggest in our solar system and lies more than ten times further from its star than the sun does from Neptune.

Even though the likelihood of a chance alignment between such an object and a similarly young star is thought to be small, it will take up to two years to verify that the star and its likely planet are moving through space together.

The parent star - called 1RXS J160929.1-210524 - is similar in mass to the Sun, but is much younger.

"This is the first time we have directly seen a planetary mass object in a likely orbit around a star like our Sun," said David Lafrenicre, one of the three University of Toronto scientists who describe the fascinating object in a paper submitted to the Astrophysical Journal Letters.

Read more ....

A Biological Clock for Dads Too

From Time Magazine:

Turns out women aren't the only ones with an expiration date on their fertility. An emerging body of research is showing that men, too, have a "biological clock."

Not only do men become less fecund as they age, but their fertility begins to decline relatively early — around age 24, six years or so before women's. Historically, infertility has been seen as a female issue, as has the increased risk of Down syndrome and other birth defects, but studies now also link higher rates of autism, schizophrenia and Down syndrome in children born to older fathers. A recent paper by researchers at Sweden's Karolinska Institute found that the risk of bipolar disorder in children increased with paternal age, particularly in children born to men age 55 or older.

It used to be that "if you had hair on your chest, it was your wife's problem," says Barry Behr, an associate professor of obstetrics and gynecology at the Stanford Medical School and director of Stanford's in vitro fertilization laboratory. Even now, he said, though about half of infertility cases are caused by male factors, such as low sperm count or motility, there are many more tests to evaluate a woman's fertility than a man's.

Read more ....

Testosterone Levels 'Affect Sexual Attraction'


From The Independent:

Women with high levels of testosterone are more attracted to masculine-looking men like James Bond actor Daniel Craig, scientists said today.

Meanwhile men, whose levels of the hormone are increased, are more attracted to feminine faces like Hollywood actress Natalie Portman.

Researchers at Aberdeen University Face Research Laboratory carried out the first study into the role testosterone plays in attraction between the sexes.

During the study, men and women completed four test sessions each conducted a week apart. In each session volunteers provided a saliva sample which was used to measure testosterone levels.

Researchers found that when asked to choose between different types of faces in each session, the subjects' attitudes changed depending on their testosterone level.

Read more ....

Should Naples Fear A Big Bang From Vesuvius?


From New Scientist:

RESIDENTS of Naples, take note: the hazard posed by Vesuvius may have to be rethought after the discovery that its magma chamber has been moving upwards towards its mouth.

Bruno Scaillet at the University of Orléans, France, and colleagues studied the proportions and types of crystal in rocks erupted from Vesuvius on four different occasions: 7800 years ago, 3600 years ago, 1929 years ago (Pompeii) and 1536 years ago. This allowed them to estimate the pressure, and hence depth, that each sample crystallised at.

By combining this with results from previous research, they were able to show that Vesuvius's magma chamber has moved upwards by between 9000 and 11,000 metres over the last 22,000 years (Nature, DOI: 10.1038/nature/07232). It isn't clear why the magma chamber has shifted, but possible reasons include changes in the shape and size of Vesuvius's mouth, a decrease in magma density, and earthquake movements.

Read more ....

Giant Honeybees Use Shimmering 'Mexican Waves' To Repel Predatory Wasps


From Science Daily:

ScienceDaily (Sep. 15, 2008) — The phenomenon of "shimmering" in giant honeybees, in which hundreds—or even thousands—of individual honeybees flip their abdomens upwards within a split-second to produce a Mexican Wave-like pattern across the bee nest, has received much interest but both its precise mode of action and its purpose have long remained a mystery.

In a new study published in the journal PLoS ONE this week, researchers at the University of Graz, Austria, and the Royal Botanic Gardens Kew, UK, report the finding that shimmering—a remarkable capacity of rapid communication in giant honeybees—acts as a defensive mechanism, which repels predatory hornets, forcing them to hunt free-flying bees, further afield, rather than foraging bees directly from the honeybee nest.

Read more .....

Fear Of Physics

From New York Times Science:

The new particle collider in Europe hasn’t hurt anyone there yet, but all the talk about a “doomsday machine” seems to be taking a toll elsewhere, according to Reuters (hat tip: Charles Mann). It reports from Bhopal that Indians were so alarmed by reports that the Large Hadron Collider could destroy the world that they flocked to temples to pray and fast. One teenage girl traumatized by the warnings on television committed suicide, according to Reuters, which quoted her father: “We tried to divert her attention and told her she should not worry about such things, but to no avail.”

My colleague Dennis Overbye has done a good job of debunking this week’s fears, and Ron Bailey of Reason Magazine has done a nice analysis of the odds.

For further reassurance, I recommend an analysis by Max Tegmark of M.I.T. and Nick Bostrom of Oxford University. (Dr. Bostrom was featured in my column last year about the possibility that we’re living in a computer simulation.) Dr. Tegmark and Dr. Bostrom estimate, based on the relatively late evolution of life on Earth and on what we observe in the rest of the universe, that the annual risk of our planet’s being annihilated by high-energy particle collisions (or, for that matter, by an asteroid or by extraterrestrials) is one in a trillion.

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Top 10 Human Inventions of All Time

Language Is The Number #1 Invention

From Top Tenz:

This list can’t help but be relative and therefore controversial. As always be kind and appreciate the effort even if you disagree.

Although humans are not alone as tool using animals, we are definitely the planet’s designated experts in the field. Our use of invention, or the innovation of altering an object or process in new ways, may be what truly defines us as a species. Every once in a long while, something is invented which changes, in some small way, the very nature of our lives. Over time, this has made us unique among the animals. While little inventions come out every day, it is these big ones that move us forward into whatever the destiny of mankind turns out to be.

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Blurred Out: 51 Things You Aren't Allowed to See on Google Maps


From IT Security:

IT Security Editors

Depending on which feature you use, Google Maps offers a satellite view or a street-level view of tons of locations around the world. You can look up landmarks like the Pyramids of Egypt or the Great Wall of China, as well as more personal places, like your ex’s house. But for all of the places that Google Maps allows you to see, there are plenty of places that are off-limits. Whether it’s due to government restrictions, personal-privacy lawsuits or mistakes, Google Maps has slapped a "Prohibited" sign on the following 51 places.

Read more and check out the following 51 places ....

Sunday, September 14, 2008

The Science Of Glass


The Nature of Glass Remains Anything But Clear
-- New York Times Science


It is well known that panes of stained glass in old European churches are thicker at the bottom because glass is a slow-moving liquid that flows downward over centuries.

Well known, but wrong. Medieval stained glass makers were simply unable to make perfectly flat panes, and the windows were just as unevenly thick when new.

The tale contains a grain of truth about glass resembling a liquid, however. The arrangement of atoms and molecules in glass is indistinguishable from that of a liquid. But how can a liquid be as strikingly hard as glass?

“They’re the thickest and gooiest of liquids and the most disordered and structureless of rigid solids,” said Peter Harrowell, a professor of chemistry at the University of Sydney in Australia, speaking of glasses, which can be formed from different raw materials. “They sit right at this really profound sort of puzzle.”

Read more ....

The Science Of Lightning Strikes


Struck By Lightning -- The Walrus

In the summer of 2002, I was camped at the mouth of the French River, lying on my Therm-a-Rest waiting out a thunderstorm, when my tent was struck by lightning. It was over before I knew what had happened, before adrenalin had any role to play, before fear took over. My tent poles took the charge and I was spared, completely. The narrow escape got me asking around. How often does this happen? It turns out everybody has a lightning story.

Floyd Woods, a retired truck driver from Ardbeg, Ontario, was twelve years old in 1943 when his house was hit. The strike shot through the radio antenna, exploded in the living room intoa blue fireball that roared down the hall, lifting up the linoleum runner by the tacks, ripping the nails out of the floor, splintering the house walls as fine as kindling before it ran off over the bedrock outside and died. Woods’ guitar was hanging on the wall over his bed. Sixty-five years later, he still shakes his head: “That strike burned the guitar strings off, bing, bing, bing, threw me right out of bed and across the room so I ached for a month. Nothin’ will move you faster than lightning. Nothin’.”

Read more ....

How Quickly Can Sharks Detect Blood In The Water?

From The Straight Dope:

Dear Cecil:

We've all seen it in a movie: A small group of people are swimming in the sea. Someone gets hurt, blood touches water, and instantly sharks appear who then devour the party in a ruthless and very painful way. But how fast does the odor or taste of blood go in water? Am I right to believe that it takes a while for a shark a mile away to taste it?

— David, Belgium

Cecil replies:

I'll confess I haven't seen a lot of Belgian shark movies, David, but virtually any Hollywood studio exec would see a major problem with the treatment you've outlined above. If the shark shows up the second the hemoglobin hits the water, where's the unbearable tension? What we're missing is that excruciating interval of stillness between the close-up of slowly seeping blood and the moment the here-comes-the-shark music kicks in. You're right, though, to suspect that this interval does tend to run a little shorter on the big screen than in real life.

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Scientists: Is Sleep Essential?

From Med Gadget:

Writing in the latest PLoS Biology, researchers from the University of Wisconsin, Madison are wondering whether sleep is really a biological necessity, or maybe it's just a function created by evolution to kill time and avoid stress.

From the article in PLoS Biology:

Everybody knows that sleep is important, yet the function of sleep seems like the mythological phoenix: “Che vi sia ciascun lo dice, dove sia nessun lo sa” (“that there is one they all say, where it may be no one knows,” Wolfgang Amadeus Mozart and Lorenzo da Ponte [1790], Così fan tutte). But what if the search for an essential function of sleep is misguided? What if sleep is not required but rather a kind of extreme indolence that animals indulge in when they have no more pressing needs, such as eating or reproducing? In many circumstances sleeping may be a less dangerous choice than roaming around, wasting energy and exposing oneself to predators. Also, if sleep is just one out of a repertoire of available behaviors that is useful without being essential, it is easier to explain why sleep duration varies so much across species. This “null hypothesis” would explain why nobody has yet identified a core function of sleep. But how strong is the evidence supporting it? And are there counterexamples?

So far the null hypothesis has survived better than alternatives positing some core function for sleep [8–10]. In what follows we shall test the null hypothesis by considering three of its key corollaries. If the null hypothesis were right, we would expect to find: (1) animals that do not sleep at all; (2) animals that do not need recovery sleep when they stay awake longer; and, finally, (3) that lack of sleep occurs without serious consequences.

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What Stuff Is Worth More Than Its Weight In Gold?

From Evil Mad Scientist:

It's a common figure of speech to say that x is worth its weight in y, where y is usually (but not always) gold. But most of us don't buy and weigh gold very often, so how do you connect that to real life? Does "worth its weight" in pennies or $100 bills make any more sense?

We have collected here a bunch of examples for different things that represent a wide range of monetary value per unit weight, in what might make a useful calibration chart for your future idiomatic usage.

Let's start this off with a down-to-earth question. Which has a higher monetary density: dimes or quarters? In other words, if you had to carry around $1000 worth of either dimes or quarters, which should you ask for?

Item -- Price per pound
Gold -- $12,000
Platinum -- $20,679
Fifty Dollar Bills -- $22,680
Cocaine -- $22,680
Hundred Dollar Bills -- $45,359
Rhodium -- $77,292
Good-quality, one-carat diamonds -- $11.4 M
LSD -- $55 M
Antimatter -- $26 Quadrillion

Read more ....

Top 10 Amazing Physics Videos


From Wired:

Tesla coils, superconductors, and hilarious music videos are great reasons to be excited about physics. Here are some of our favorites.

Read and watch the videos here ....

Ten Things You Don’t Know About The Earth


From Discover Magazine:

Good advice from the 70s progressive band. Look around you. Unless you’re one of the Apollo astronauts, you’ve lived your entire life within a few hundred kilometers of the surface of the Earth. There’s a whole planet beneath your feet, 6.6 sextillion tons of it, one trillion cubic kilometers of it. But how well do you know it?

Below are ten facts about the Earth — the second in my series of Ten Things You Don’t Know (the first was on the Milky Way). Some things I already knew (and probably you do, too), some I had ideas about and had to do some research to check, and others I totally made up. Wait! No! Kidding. They’re all real. But how many of them do you know? Be honest.

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The Rise And Fall Of The Space Shuttle


From American Scientist:

Since NASA's creation in the 1950s, its history has followed a course that calls to mind the Greek tragedies—tremendous early success, followed by a series of catastrophes and failures, which share the same root cause. Nearly 40 years have passed since NASA had its most notable successes, which culminated in Neil Armstrong's walk on the lunar surface. Since then, the agency has struggled to come up with meaningful goals that could take advantage of the sustained political support the agency has enjoyed over the decades. NASA has a rich tradition and employs the world's best scientists and engineers. Yet in recent decades its most notable moments have come in the form of disasters and their aftermath. And the institutional and cultural problems that led to the explosion of the space shuttle Challenger in 1986 went largely uncorrected for 17 years and contributed to the Columbia accident in 2003. The agency's identity crisis continues and will stretch into the next presidential administration and perhaps beyond. How the story of its space shuttle program will end remains highly uncertain.

Read more ....