Tesla’s Wireless Predictions

Wednesday, May 5th, 2010

According to a recent Telegraph headline, Nikola Tesla predicted the Blackberry a century ago — which is really missing the point, if you look back at the original Popular Mechanics piece, which itself cites the New York Times:

The attention of the world has been caught and held by the wireless telegraph, and yet this is a very primitive use of the art. So far only electric waves have been used, which have been quickly damped out in their passage through the air. It is possible, however, to transmit electric currents of enormous power for thousands of miles without diminishing their energy. This is not a theory, but a truth established by many practical experiments. It will soon be possible to transmit wireless messages all over the world so simply that any individual can carry and operate his own apparatus. The wireless transmission of power across the ocean, for instance, obviously opens up an entirely new era in mechanical developments.

It will soon be possible, for instance, for a business man in New York to dictate instructions and have them appear instantly in type in London or elsewhere. He will be able to call up from his desk and talk with any telephone subscriber in the world. It will only be necessary to carry an inexpensive instrument not bigger than a watch, which will enable its bearer to hear anywhere on sea or land for distances of thousands of miles. One may listen r transmit speech or song to the uttermost parts of the world. In the same way any kind of picture, drawing, or print can be transferred from on place to another. It will be possible to operate millions of such instruments from a single station. Thus it will be a simple matter to keep the uttermost parts of the world in instant tough with each other. The song of a great singer, the speech of a political leader, the sermon of a great divine, the lecture of a man of science may thus be delivered to an audience scattered all over the world.

More important than this, however, will be the transmission of power without wires over great distances. I have been experimenting with a model of a boat operated by electric power transmitted without wires, and the results are astounding. It is possible, I find, to control the movements of the boat absolutely from a central station without electrical connections of any kind. What has been done with a little boat on a small body of water will eventually be done by the largest liners at any distance from land. In other words, an ocean liner may be propelled across the Atlantic ocean at high speed by power directed from a wireless station on shore. We may confidently expect that within a few years many wonder now not dreamed of will be mere commonplace.

The mobile radio telephone Tesla envisions sounds like a simple, but powerful, radio transceiver — only impossibly small with the pre-transistor technology of Tesla’s day. In fact, the whole idea is not particularly practical with today’s technology either, until you introduce a cellular network, and most of what characterizes a Blackberry isn’t the radio so much as the miniature computer — a technology Tesla did not predict.

Instead, he predicted wireless power transmission. It turns out that it’s much, much easier to transmit information over the ether than significant amounts of usable energy.

The Top Ten Staph Infections in MMA History

Wednesday, May 5th, 2010

Staph infections are no joke. If your job involves grappling — without a gi — while covered in abrasions from punches and kicks, you have to keep on the look out for small staph infections, before they get big.

And if you’re the kind of guy who volunteers to hop in the Octagon, you’re probably not quick to run to the doctor for a painful pimple.

This behavior leads to the top ten staph infections in MMA history. For your own sanity, do not follow the link.

Secession and the Future of American Statecraft

Wednesday, May 5th, 2010

Keith Preston looks at secession and the future of American statecraft, starting with some thoughts from George Kennan, who combined humility with unsentimental realism:

He was particularly opposed to entangling American foreign policy objectives with ideological crusades. In an interview with the New York Review of Books in 1999, the 95-year-old Kennan remarked, “”This whole tendency to see ourselves as the center of political enlightenment and as teachers to a great part of the rest of the world strikes me as un-thought-through, vainglorious and undesirable.” What was Kennan’s preferred alternative? He insisted, “I would like to see our government gradually withdraw from its public advocacy of democracy and human rights. I submit that governments should deal with other governments as such, and should avoid unnecessary involvement, particularly personal involvement, with their leaders.”

In his 1993 book, “Around the Cragged Hill: A Personal and Political Philosophy,” Kennan described the United States in its present condition as a “monster country” that suffers from “the hubris of inordinate size” and proposed that America be “”decentralized into something like a dozen constituent republics, absorbing not only the powers of the existing states but a considerable part of those of the present federal establishment.” He further suggested that the metropolitan areas of Los Angeles, New York, and Chicago should become the equivalent of semi-autonomous city-states. Kennan’s vision was not far removed from that of the self-proclaimed “left-conservative” Norman Mailer, who ran for mayor of New York in 1969 on a platform having the city become the 51st state and devolving the municipal government to the boroughs by re-constituting them as independent townships. More recent thinkers, such as Vermont’s Thomas Naylor, have gone even further, calling for full-blown secession of particular states or regions from the authority of the federal government altogether. Indeed, Naylor’s colleague Dennis Steele is currently running a maverick campaign for governor for the sake of advocating completely independent nationhood for the Green Mountain State. While the Vermont secessionist effort has a left-libertarian flavor to it, the emerging regional independence movements in various corners of North America transcend the left/right paradigm. Texas’ Larry Kilgore, an unabashed Christian theocrat and a proponent of complete secession by the Lone Star State, won 225, 897 votes in the 2008 Texas Republican Senate primary.

The most serious arguments against such efforts offered by a thinker on the genuine Right were those of Sam Francis. He dismissed secessionism as an “infantile disorder” and remarked, “I do not believe that secessionism will prosper as a serious political movement, but I do worry that it will prosper to the point of becoming a serious political distraction; a distraction from the imperative that Middle Americans now face of constructing their own autonomous political movement that can take back their nation rather than assisting the new underclass and the globalist ruling class in breaking it up.” Dr. Francis preferred instead the more moderate but still radical by contemporary political standards goal of reasserting the Tenth Amendment. I do not know which is the least feasible objective, full-blown secession or restoration of an authentic federalism. Either way, it appears that the revolution by the “Middle American Radicals” that Francis hoped for is dead in the water and, as John Derbyshire has recently written, the Tea Partiers are well on their way to being just another arm of the neocon-friendly establishment.

Still, interesting things are happening in American society. A work published in 2008 by Bill Bishop, a center-left journalist, and titled “The Big Sort,” showed how Americans are in the process of self-separating into more or less segregated enclaves along the lines of political ideology and party affiliation, religion, culture, race, ethnicity, income, age, and other such demographic concerns. Further, this process is taking place less at the state level, and more on the level of counties, towns, municipalities, or even precincts and neighborhoods. Efforts by the elites to the contrary not withstanding, Americans are apparently doing what human beings naturally do anyway: seeking out others of their own kind with whom they form communities. This state of affairs seems to fit fairly well with the decentralist vision offered by Kennan, Mailer, and the Vermont independencias. A 2008 Zogby poll likewise indicated that one in five Americans holds favorable views regarding the possibility of secession.

Nuke that slick

Tuesday, May 4th, 2010

As BP prepares to lower a 70-ton dome over the oil gusher in the Gulf of Mexico, the Russians, Julia Ioffe says, could offer their own advice — nuke that slick:

Komsomoloskaya Pravda, the best-selling Russian daily, reports that in Soviet times such leaks were plugged with controlled nuclear blasts underground. The idea is simple, KP writes: “the underground explosion moves the rock, presses on it, and, in essence, squeezes the well’s channel.”

Yes! It’s so simple, in fact, that the Soviet Union, a major oil exporter, used this method five times to deal with petrocalamities. The first happened in Uzbekistan, on September 30, 1966 with a blast 1.5 times the strength of the Hiroshima bomb and at a depth of 1.5 kilometers. KP also notes that subterranean nuclear blasts were used as much as 169 times in the Soviet Union to accomplish fairly mundane tasks like creating underground storage spaces for gas or building canals.

These kinds of surgical strikes to shut off underground leaks, however, were carried out only five times, with the last one occuring in 1979. And there was only one misfire, near Kharkov, Ukraine, where a nuclear blast was unable to stanch a gas leak.

Backyard Farmers

Tuesday, May 4th, 2010

John Robb is concerned about the ability of global guerrillas to disrupt our far-flung food and fuel networks, causing major economic damage at a minor cost to themselves.

Thus, he praises starters, people taking the initiative the build resilient communities — like Stacy Murphy of bk farmyards:

You have the land. We grow the produce.

That sounds like sharecropping or tenant-farming to me — only with hipsters instead of emancipated slaves or peasants:

While any economist will tell you that self-sufficiency is the road to poverty, a certain limited amount of autarky makes sense as insurance.

When faced with the localvore’s dilemma, we don’t want to make the old food-miles mistake, but any supply chain should recognize the cost of overage versus the cost of underage — and the cost of having too little food far outweighs the cost of carrying a little extra inventory or planting edible foods rather than decorative plants in your garden.

Sex-Related Differences in General Intelligence

Tuesday, May 4th, 2010

Dennis Mangan shares a graph from Helmuth Nyborg’s paper, Sex-related differences in general intelligence g, brain size, and social status, which concludes that women do slightly better in verbal tests, men better on spatial, and, in sum, men have an IQ advantage over women of around 7 points, with a much wider dispersion:

The result, as the graph shows, is that at an IQ of 145, which could reasonably be deemed an elite level, men outnumber women by a factor of 8. Nyborg concludes that this must be highly significant for male dominance in “higher educational and socio-economic spheres”, such as academia, science, and business. Add the male dominance in IQ at the highest levels to the fact that men are predisposed to take more risks and work longer hours, and I’d say that the feminist case for discrimination against women vanishes.

Of course, Nyborg was dealt a “Larry Summers” for showing this.

As one commenter notes, who’s smarter in general depends on how you weight different facets of intelligence:

So according to how you weight the two sorts of results [verbal and spatial], you can conclude that men are more intelligent on average, or less. And any weighting you choose is essentially arbitrary, surely? That’s why the early IQ researchers weighted them to attribute the same mean to each sex, was it not? The discovery of different standard deviations for each sex goes back to those early researchers, doesn’t it?

Cash, Guns, and a License to Rampage

Tuesday, May 4th, 2010

There is a very simple reason, Jeffrey Gettleman says, why Africa’s brutal wars never seem to end:

They are not really wars. Not in the traditional sense, at least. The combatants don’t have much of an ideology; they don’t have clear goals. They couldn’t care less about taking over capitals or major cities — in fact, they prefer the deep bush, where it is far easier to commit crimes. Today’s rebels seem especially uninterested in winning converts, content instead to steal other people’s children, stick Kalashnikovs or axes in their hands, and make them do the killing. Look closely at some of the continent’s most intractable conflicts, from the rebel-laden creeks of the Niger Delta to the inferno in the Democratic Republic of the Congo, and this is what you will find.

What we are seeing is the decline of the classic African liberation movement and the proliferation of something else — something wilder, messier, more violent, and harder to wrap our heads around. If you’d like to call this war, fine. But what is spreading across Africa like a viral pandemic is actually just opportunistic, heavily armed banditry.

I’m not sure why a New York Times East Africa bureau chief would find this at all surprising — or fundamentally different from what came before:

All they want is cash, guns, and a license to rampage. And they’ve already got all three. How do you negotiate with that? The short answer is you don’t.
[...]
How did we get here? Maybe it’s pure nostalgia, but it seems that yesteryear’s African rebels had a bit more class. They were fighting against colonialism, tyranny, or apartheid. The winning insurgencies often came with a charming, intelligent leader wielding persuasive rhetoric.

If only these rampaging bandits had charming leaders, claiming they were fighting against colonialism! Ah, those were the days!

Once the Cold War ended, there was little aid to be had through charm and anti-colonialist rhetoric:

Put the well-educated Garang and the old Mugabe in a room with today’s visionless rebel leaders, and they would have just about nothing in common. What changed in one generation was in part the world itself. The Cold War’s end bred state collapse and chaos. Where meddling great powers once found dominoes that needed to be kept from falling, they suddenly saw no national interest at all.

(The exceptions, of course, were natural resources, which could be bought just as easily — and often at a nice discount — from various armed groups.)

Suddenly, all you needed to be powerful was a gun, and as it turned out, there were plenty to go around. AK-47s and cheap ammunition bled out of the collapsed Eastern Bloc and into the farthest corners of Africa.

Hurt Me Elmo

Tuesday, May 4th, 2010

Bruce Lund, the toy-maker behind Tickle Me Elmo, has also created a Variable Velocity Weapon System, dubbed the Big Hurt:

Lund recalled seventh-grade science demon­strations in which an electric current is passed through water, producing oxygen and hydrogen gas. Mix the two together, add a spark and boom! The company used the same concept to create a successful line of hydrogen-powered rockets that electrolyze water and then ignite it, the biggest innovation in toy-rocket power for decades. NASA even awarded Lund a prize for developing the product.

Lund’s enthusiasm for hydrogen combustion power led him to look at all sorts of unlikely applications, including a hydrogen-powered lawnmower and even power tools. But Lund made little progress with other combustion applications — until a friend alerted him to a Pentagon Small Business Innovation Research request for technology to power a nonlethal weapon. The problem with existing weapons firing rubber bullets, beanbags and other crowd-control rounds is their velocity. Anything that is effective at 50 yards may be lethal at 5 yards; anything that is safe at 5 yards won’t be fast enough to be effective at 50. Lund’s solution is a weapon that automatically measures the range to the target and varies the muzzle velocity accordingly.

The application was an ideal fit for Lund’s combustion technology, which can measure out the appropriate amount of gas for each shot. Hydrogen is not a standard military fuel, so Lund’s Variable Velocity Weapon System (VVWS) uses cans of methylacetylene propadiene gas, the kind that fuels blowtorches and nail guns, sold at hardware stores. “You might view the VVWS as a repurposed nail gun,” Lund says.

The weapon’s effectiveness has been tested on blocks of gelatin that simulate human flesh; the projectiles hit with considerable force, but do not penetrate. The weapon is geared to meet the military requirement for an impact energy of 30 joules. This is similar to existing nonlethal weapons; paintball guns are limited to 12 joules. Lund says they have not yet carried out human tests but he suggests it will produce the pain of a severe wasp sting.

The muzzle velocity is normally set automatically, but at the military’s request it has a manual override, so the shooter can dial it up to maximum power and fire lethal shots. Lund sees the gun as a lifesaver, providing a less lethal option when circumstances demand. “At the moment, a soldier has to choose between carrying a nonlethal and a lethal weapon — and he’s always going to choose the lethal one,” Lund says. “This way he can carry one weapon and still have a nonlethal option.”

The rise of content farms

Tuesday, May 4th, 2010

The Economist describes the rise of content farms:

Clever software works out what internet users are interested in and how much advertising revenue a given topic can pull in. The results are sent to an army of 7,000 freelancers, each of whom must have a college degree, writing experience and a speciality. They artfully pen articles or produce video clips to fit headlines such as “How do I paint ceramic mugs?” and “Why am I so tired in winter?”

Although an article may pay as little as $5, writers make on average $20-25 an hour, says Mr Kydd. The articles are copy-edited and checked for plagiarism. For the most part, they are published on the firm’s 72 websites, including eHow, answerbag and travels.com. But videos are also uploaded onto YouTube, where the firm is by far the biggest contributor. Some articles end up on the websites of more conventional media, including USAToday, which runs travel tips produced by Demand Media. In March, Demand Media churned out 150,000 pieces of content in this way. The company is expected to go public later this year, if it is not acquired by a big web portal, such as Yahoo!, first.

The problem with content farms, ASU journalism professor Dan Gillmor says, is that they swamp the internet with mediocre content.

The upside is that “the firm is at least interested in what people want to know — which is nothing to sneer at.”

If the TSA Were Running New York

Monday, May 3rd, 2010

If the TSA were running New York, James Fallows says, this is how it would react to this weekend’s Times Square bomb threat:

  • All vans or SUVs headed into Midtown Manhattan would have to stop and have their contents inspected. If any vehicle seemed for any reason to have escaped inspection, Midtown in its entirety would be evacuated;
  • A whole new uniformed force — the Times Square Security Administration, or TsSA — would be formed for this purpose;
  • The restrictions would never be lifted and the TsSA would have permanent life, because the political incentives here work only one way.

Grizzlies, polar bears interbreeding

Monday, May 3rd, 2010

Researchers in the Northwest Territories say they may have found the first recorded offspring of a hybrid female polar-grizzly bear in the wild:

Government officials say an Inuvialuit hunter, David Kuptana, shot an unusual-looking bear during a hunting trip April 8 near Banks Island, in the Inuvik region.

He provided federal scientists with samples to see what type of bear it was.

Officials with the territorial government say those test showed that the dead bear was the offspring of another hybrid bear — a female polar-grizzly mix who had mated with a male grizzly.

Scientists confirmed this by comparing the dead bear’s DNA with that of local polar bear and grizzly populations, and that of a male polar-grizzly hybrid, which was shot on Banks Island in 2006.

Just the Good Parts

Monday, May 3rd, 2010

I’m beginning to wish William Goldman had been brought on to produce The Pacific, just the good parts:

They’re kissing again, do we have to hear the kissing part?

Skip on to the Fire Swamp, I say.

Autonomous Rotorcraft Sniper System

Monday, May 3rd, 2010

Helicopters, drones and trained snipers are often used together.  The Autonomous Rotorcraft Sniper System combines all three by mounting a powerful rifle onto a highly stabilized turret on board a Vigilante unmanned helicopter:

Sniping from a chopper currently takes tons of skill and training.

But ARSS is literally point-and-shoot for the operator on the ground, using a videogame-type controller. The software makes all the necessary corrections, and the system should ensure first-round kills at several hundred yards. The secret is in the control system and stabilized turret (on the right in the picture above), which is currently fitted with a powerful RND Manufacturing Edge 2000 rifle specifically designed for sniping work, using the heavyweight .338 Lapua Magnum cartridge.

The name needs changing, but there’s already one good suggestion for a pirate-fighting version: Autonomous Rotorcraft Remote Robot Rifle — ARRRR!

Really Lean Start-Ups

Monday, May 3rd, 2010

So-called lean start-ups focus on building the minimal product to get customer feedback as soon as possible. The folks at Aardvark took this a step further:

Start-up Aardvark had an idea to develop a social search engine, in which people could ask a question via instant messenger and then Aardvark would automatically route the question to the user’s friends, and friends of friends, finally bringing the answer back to the user from the user’s own extended social network.

But before Aardvark built the technology it tried out the service with humans behind the curtain, in a “Wizard of Oz” scheme.

Aardvark employees would get the questions from beta test users and route them to users who were online and would have the answer to the question. This was done to test out the concept before the company spent the time and money to build it, said Damon Horowitz, co-founder of Aardvark, who spoke at Startup Lessons Learned, a conference in San Francisco on Friday.

“If people like this in super crappy form, then this is worth building, because they’ll like it even more,” Horowitz said of their initial idea.

At the same time it was testing a “fake” product powered by humans, the company started building the automated product to replace humans. While it used humans “behind the curtain,” it gained the benefit of learning from all the questions, including how to route the questions and the entire process with users.

“We kept running it as a ‘Wizard of Oz’ for nine months with humans at the back end…classifying queries, managing conversations but not necessarily answering questions,” Horowitz said.

The company meanwhile raised $2 million in seed funding, then $5.5 million in Series A financing to build out the automated technology to replace the humans.

Aardvark also focused heavily on research with users, bringing in six to twelve users a week every week for months. Aardvark was eventually acquired earlier this year by Google Inc.

Low-cost, more efficient solar cells mostly plastic

Monday, May 3rd, 2010

By growing arrays of silicon wires in a polymer substrate, Caltech researchers have developed flexible, low-cost solar cells that absorb up to 96 percent of incident light:

California Institute of Technology (Caltech) researchers said the wires are made up of 98 percent plastic, potentially lowering the cost of photovoltaics by using just 1/50th the amount of semiconductor material used today. In tests, the experimental solar cells demonstrated over 90 percent quantum efficiency.

“By developing light-trapping techniques for relatively sparse wire arrays, not only did we achieve suitable absorption, but we also demonstrated effective optical concentration,” claimed Harry Atwater, director of Caltech’s Resnick Institute.

The silicon wires measure just 1 micron in diameter, but can be as long as 100 microns and can be embedded in a transparent polymer. Light is converted into electricity only inside the wires, but light not immediately absorbed bounces around inside the matrix until it enters another wire. The result, researchers said, is both high concentration and high efficiency in the material.

Solar cells based on the technique could potentially be very inexpensive to manufacture since only 2 percent of the materials are expensive semiconductors while the remainder is made from inexpensive plastic.

The new material is about the same overall thickness as a conventional solar cells–about 100 microns–but contain as much silicon as a solar cell measuring just 2 microns in thickness.

Atwater said he is now working to increase the operating voltage and size of the solar cells so that they can eventually be manufactured in flexible sheets using inexpensive roll-to-roll fabrication equipment.