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NASA Going Green...

This rendering shows the spacecraft that will carry the green propulsion system into orbit in 2015. Image: Ball Aerospace

Although, it reminded me of a scene from Wall-E. Just saying...Smiley

For decades, NASA has relied on an efficient but highly toxic fuel known as hydrazine to power satellites and manned spacecraft. Now the agency is laying the groundwork to replace that propellant with a safer, cleaner alternative.

 

NASA's Green Propellant Infusion Mission, or GPIM, has passed its first thruster pulsing test, a major milestone that paves the way for a planned test flight in 2015, agency officials said. NASA unveiled the rocket thruster success Tuesday (July 9) in Washington, D.C., during a briefing with aerospace industry officials and Colorado Sen. Mark Udall (D-CO).

 

The GPIM initiative aims to demonstrate that a green fuel with nearly 50 percent better performance than hydrazine could power Earth-circling satellites and eventually deep space missions.

 

Scientific American: NASA's Quest for Green Rocket Fuel Passes Big Test

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From Head to Toe...



When Vincent Rodgers was six years old, he and his twin brother Victor got toy robots for Christmas. The robots could walk across the floor and shoot ping pong balls from their arms. “But the most fascinating things about this,” he recalled, “was a panel you could take off the side of it, and you could actually see inside, all the gears and all the workings inside. After that, I was hooked,” he said. “I had to see how all these things worked. I was always in competition with my twin brother, to find out who could be the smartest, who knows the most about how everything worked."

Vincent and Victor are still competing to learn about the world, but they have chosen different ways of learning. Victor became a chemical engineer, while Vincent became a physicist. “[Victor] wanted to be much more practical with his way of handling things, and I wanted to really learn what was going on in a fundamental level,” Rodgers said. Vincent studies an offshoot of superstring theory, a theory that says the universe's fundamental constituents are tiny vibrating strings. He studies the way gravity works in various conceptions of string theory. He uses mathematics to describe his theories, and he sometimes takes a pen and paper to bed with him at night to make calculations. “It's fun,”Rodgers said. “I think there's some really great stuff [in physics] to play around with.”

Vincent Rodgers teaches a class at Iowa called “Physics from Head to Toe,” which studies how physics can apply to the human body.

Rodgers greatly admires Albert Einstein, who in addition to discovering new ideas in physics such as the theory of relativity, also campaigned for world peace and wrote about the society around him. In his 1950 book, Out of My Later Years, Einstein wrote about racism in segregated American society. “What can the man of good will do to combat this deeply rooted prejudice?,” Einstein asked. “He must have the courage to set an example by word and deed, must watch lest his children become influenced by this racial bias.” “He's much bigger than people already think he is," Rodgers said. “When you read the way [Einstein] acts throughout his life - this guy was really on it.”

Physics Central: Vincent Rodgers

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Sound Levitation...



A new approach to contact-free manipulation could be used to combine lab samples while also preventing contamination

 

By Josh Howgego and Nature Magazine

 

Water droplets, coffee granules, fragments of polystyrene and even a toothpick are among the items that have been flying around in a Swiss laboratory lately — all of them kept in the air by sound waves. The device that achieves this acoustic levitation is the first to be capable of handling several objects simultaneously. It is described today in the Proceedings of the National Academy of Sciences.

 

Typically, levitation techniques make use of electromagnetism; magnetic forces have even been used to levitate frogs. It has long been known that sound waves could counter gravity, too, but so far the method has lacked practical application because it could do little more than keep an object in place.

 

To also move and manipulate levitating objects, Dimos Poulikakos, a mechanical engineer at the Swiss Federal Institute of Technology (ETH) in Zurich, and his colleagues built sound-making platforms using piezoelectric crystals, which shrink or stretch depending on the voltage applied to them. Each platform is the size of a pinky nail.

 

Scientific American: Sound Waves Levitate and Move Objects

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Paleo Mind...


I can honestly state this is the first blog post inspired by a nightmare (of sorts).

Flashing back to undergraduate, I was in my dream looking at an exam in Thermodynamics. In typical dream fashion, even though I read and understood the questions - mind you, I recall passing this particular test on the Carnot cycle with an 87 - I could not answer. Dream state, I was a blank!

I relate this to the word "paleo" meaning ancient; prehistoric. Hence, the current "paleo diet" craze to "eat like a caveman," though cavemen didn't do things like Cross Fit.

I extended this departure from modernity to the mind...

What if: we're still that caveman that depended on our memory to survive? "Knowing" the part of the forest the mamoths would stampede in; the Saber Tooth tigers hunted US in packs was probably necessary to our continued survival! Nikola Tesla was said to have a photographic memory. In the age of search engines, are we neglecting Memory Consolidation: sometimes called "no mind" in martial arts, the product of acquiring new information, rehearsing it and putting it from short-term to long-term memory; "wiring ourselves" to see a pattern and know how to solve a math problem; Sudoku puzzle or spot the charging Mamoth/Saber Tooth from a mere rustle of the trees. We have leaned on the combination of the Internet, computer and power point, delivering complex concepts online with little human interaction, meaning you either have the motivation to go beyond the flurry of slides thrown at you (read the class text book), or we may be fooling ourselves with something that's fast and cheap but not as efficient as repetition and adequate sleep to reinforce neural pathways in our brains.

And if so: what are we losing to technology...of ourselves?
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It's Official!

Hard to believe three novels later all the years I dreamt of writing books that it really happened. When I think of all the hard work that went into getting them written and published, it certainly becomes real!
Now that 'Book of Dragon's Teeth' is a few days away from release, there's no 'breather' because I have other writing projects in the pipeline and working on a tv show and developing one as well.  I'm also seriously thinking about going to get my Ph.D. in Digital Media Studies (what else?) So that's going to be a process on its own!

In the meantime, those of you who haven't read the two previous books from the TFLR Series you can find them at:

Book Two: TFLR: THE GRAY MAN

Book One: Tales from the Long Road

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Rosetta...

Image Source: Women in Planetary Science

 


Dr. Alexander is the Project Scientist for the U.S. portion of the international Rosetta mission. She has also been the Cassini Project Staff Scientist and as the final project manager of the Galileo mission, overseeing its fiery crash into Jupiter. Her scientific interests include gaskinetic theory, theory of gaseous escape from planetary and cometary regoliths, theory of surface bound exospheres, magnetospheric plasma theory (terrestrial and planetary), exobiology, interdiciplinary science, and oxidation / reduction potential of planetary and cometary regoliths.

Her most recent publications include:

  • C. Alexander, A. Chmielewski, S. Gulkis, P. Weissman, D. Holmes, J. Burch, R. Goldstein, P. Mokashi, S.A. Stern, J. Parker, S. Fuselier, M. Kueppers, A. Accommazzo, “The U.S. Rosetta Project at its second Science Target: Asteroid (21) Lutetia,” IEEE Conference Proceedings, in press.
  • C. Alexander, D. Sweetnam, S. Gulkis, P. Weissman, D. Holmes, J. Burch, R. Goldstein, P. Mokashi, J. Parker, S. Fuselier, L. McFadden, “The U.S. Rosetta Project at its first Science Target: Asteroid (2867) Steins,” IEEE Conference Proceedings, 2010.
  • C. Alexander, R. Carlson, G. Consolmagno, D. Morrison, 400 Years of Discovery at Europa, Europa, Pappalardo, McKinnon, Khurana eds., University of Arizona Press, 2009.

2014, Rosetta will enter orbit around comet 67P/Churyumov-Gerasimenkoand land a probe on it, two firsts.



Rosetta’s goal is to learn the primordial story a comet tells as it gloriously falls to pieces.



Comets are primitive leftovers from our solar system's 'construction' about 4.5 billion years ago. Because they spend much of their time in the deep freeze of the outer solar system, comets are well preserved—a gold mine for astronomers who want to know what conditions were like back “in the beginning.”

 

NASA Science News: Mission to Land on a Comet
European Space Agency: Rosetta

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(For all 14 images go here. Yes I hate the popups too.)

I just have some initial thoughts about the tragic yet entirely predictable outcome in the Trayvon Martin case.

One, it seems that the prosecution's heart just wasn't in it. They had to be dragged kicking and screaming into the case and it showed. Two, even if it had been filmed or if there were more witnesses there's a very good chance that you would have gotten that same verdict. There have been those cases as well, although I'm thinking of Oscar Grant where his death was pretty much filmed and that cop served a whopping one year sentence. Three, even if Trayvon Martin had lived and could have presented his own version there's no evidence that would have changed the verdict either. Just take a look at the local Jordan Miles verdict where Miles was beaten to an inch of his life and we couldn't get a conviction against the cops. Four, it has become clear to me that black men are Marked for Death in this society. It's clear that we're being groomed for the prison industrial complex at best and just routinely murdered at worst.

I'm really not sure what can be done about any of these things. I guess more decent paying jobs for everyone would help. Perhaps more black men need to carry guns so that  predators will at least know they'll be in a fight. But when I reverse the situation in my head -- where Trayvon Martin shoots Zimmerman --  every time Trayvon Martin gets convicted and for a long time.

I was looking through my Facebook feed and found a number of helpful illustrations and images that explain these problems. These images made me feel a little better for some reason. So enjoy the slideshow. Related: The story about the arrest of Dennis Henderson, for, as best as I can tell, being "uppity" tells the problem from a Pittsburgh angle here and here. Somewhat Related: My struggle against Peter Gidas of Gidas Flowers and the Pennsylvania Human Relations Commission (PHRC) continues. And justifiably so.

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I AM (repost)...



I’ve posted on this elsewhere: “Old Tapes”; “BWB”; “Self-Portrait.” I’ve changed my Facebook profile photo to Trayvon, and spoken with my sons. Let me explain:

In “Old Tapes,” I revisited an incident in which I was forcibly frisked by a store detective. He didn’t care if I had a microscope, a telescope, a tool kit, a chemistry set at home, physics and science books nor did he ask if I had a complete set of the Encyclopedia Britannica. No, I was a suspect for shoplifting for merely combing my hair: guilty until proven innocent. “BWB” was an admittedly emotional response directly to the absurdity of a teenager losing his life over his dress, an iced tea and skittles; “Self-Portrait” was written earlier, but reflected the same concerns.

In Nanos Gigantium Humeris Insidentes, I did describe my background a bit, but not so the photo. I became Brigade Commander of Winston-Salem/Forsyth County Schools '79 - 80 on the negative answer to what I thought was a rhetorical question to the Commander for the ’76-77 school year: “what would it take for someone to rise to your rank?” His answer was specifically addressed (to my ethnicity and potential): “Your kind will NEVER get to this rank!” (Never) say never: the complete irony was he went in an enlisted, I an Air Force officer. We saw each other on active duty at Bergstrom Air Force Base in Austin, Texas. He had a Constitutional obligation to salute me.Smiley

Women and men of a certain age in my culture can trace back to when we lived in humble conditions on a segregated side of of our respective towns, I recall numerous times when the sight of drug dealers and runners; switch blades, kitchen hatchets (both directed at me) or guns threatened our lives. Despite these challenges, many of us went to college – HBCUs, Ivy League, Graduate Schools – and attained degrees for a better life. Our parents, and leaders of the Civil Rights movement (like my sister) inspired us to do this.

Tony Morrison said: "In this country American means white. Everyone else has to hyphenate." So, I am classed as African-American because Negro/Black wasn’t definitive enough for Malcolm X. As he went on his own pilgrimage of self-discovery to Mecca, he coined “Afro American,” founding the Organization of Afro American Unity (dissolved after his assassination). Reverend Jesse Jackson is credited as the source of “African-American,” since as a fellow engineering student from A and T pointed out: “there’s no such country as ‘Afro.’” And to be sure: Africa is a continent of 53 different nationalities, as diverse as this nation in cultures and ethnicity.

Yet, all this effort towards equity, to “pull ourselves up by our own bootstraps,” we as our parents must have “the talk” with our male sons, how to behave in public, how to talk to the police if stopped, how not to appear “a threat.” Yet, I still get quick looks when I get on an elevator, shifted purses, I must put others at ease; apologize when professionally embarrassed in email. Guilty until [I've] proven [myself] innocent...

I AM: the father of two statistics: The risk of dying from homicide among non-Hispanic black male teenagers (39.2 per 100,000 population) is more than twice that of Hispanic males (17.1 per 100,000 population) (Figure 4) and about 15 times that of non-Hispanic white males (2.6 per 100,000 population); at current levels of incarceration a black male in the United States today has greater than a 1 in 4 chance of going to prison during his lifetime, while a Hispanic male has a 1 in 6 chance and a white male has a 1 in 23 chance of serving time. That has nothing to do with their locale (suburbs); nothing to do with my education, their education or career choices. It is the aftermath of what historians tastefully describe as “the peculiar institution,” of the antebellum South, as with South Africa’s Apartheid, based on pigmentation, its wages and legacy. What happened to Trayvon is the unspoken nightmare; the uttered prayer each night, Psalms and Glossolalia. We do not have the luxury, or security to be blithely skeptic or agnostic. The slaughter of male children by Pharaoh and Herod are not biblical illustrations, but an evidential, everyday concern.

All I ask, all WE ask: is to be considered not as a threat, but for our potential.

Related links:

BlackAmericaWeb
TheGrio
TheRoot

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Teaching Quantum...



Abstract

The Institute of Physics New Quantum Curriculum consists of freely available online learning and teaching materials (quantumphysics.iop.org) for a first course in university quantum mechanics starting from two-level systems. This approach immediately immerses students in inherently quantum mechanical aspects by focusing on experiments that have no classical explanation. It allows from the start a discussion of interpretive aspects of quantum mechanics and quantum information theory. This article gives an overview of the resources available at the IOP website. The core text is presented as around 80 articles co-authored by leading experts that are arranged in themes and can be used flexibly to provide a range of alternative approaches. Many of the articles include interactive simulations with accompanying activities and problem sets that can be explored by students to enhance their understanding. Much of the linear algebra needed for this approach is part of the resource. Solutions to activities are available to instructors. The resources can be used in a variety of ways from supplements to existing courses to a complete programme.

I'm encouraging this as our very advancement in technology takes place on the quantum level: your cell phone, your laptop, your I-pad, your apps. All of that would not be possible except for something Einstein derisively called: "Spukhafte Fernwirkung," literally "spooky action at a distance" (and he was not amused). I guess my only regret is there's not a more introductory class, a "laymen's course" in quantum mechanics; presented by kind of a Carl Sagan of theoretical physics.

So, when you get into a "debate" on quantum mechanics, you'll likely hear: "so is light a particle, or a wave, and why don't scientists know? When you answer its "both" it's seen as a cop out; that you really don't know what you're talking about (and neither do the scientists). Scrodinger's cat is both "living and dead" as light is both particle and wave; quarks; many-worlds theory. Quantum physics is weird, and it's why Einstein had such a strong reaction to it, even though he helped create it.

You can always utter "Spukhafte Fernwirkung" and march away gruffly. You're literally making yourself a "ghost" and avoiding empty philosophical debates. Practice your German and say it with emphasis on the syllables. They'll roll their eyes and think you're speaking Klingon...inform them later. Qapla'! Smiley

Physics arXiv:
A new introductory quantum mechanics curriculum
Optimization of Simulations for a New Introductory Quantum Mechanics Curriculum

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Nano Space Explorers...

Artist concept of tiny CubeSat Ambipolar Thruster system - CAT. Image: Ben Longmier - University of Michigan

Researchers plan to launch a tiny spacecraft to Earth orbit and beyond within the next 18 months, in a key test of new propulsion technology that could help cut the cost of planetary exploration by a factor of 1,000.

The scientists and engineers are developing a new plasma propulsion system designed for ultrasmall CubeSats. If all goes well, they say, it may be possible to launch a life-detection mission to Jupiter's ocean-harboring moon Europa or other intriguing worlds for as little as $1 million in the not-too-distant future.

"We want to enable new missions that right now cost about $1 billion, or maybe $500 million — to go, for example, explore the moons of Jupiter and Saturn," said project leader Ben Longmier, a plasma physicist and assistant professor at the University of Michigan.

To get the ball rolling, Longmier and his team launched a crowdfunding campaign on the website Kickstarter Thursday (July 4). They hope to raise a minimum of $200,000 by Aug. 5, which should be enough to loft the miniature thruster on its maiden space voyage.

Scientific American: New Space Engine Could Turn Tiny CubeSat into Interplanetary Explorers

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Eugen Merzbacher...


April 9, 1921 - June 6, 2013

Chapel Hill
Eugen Merzbacher, prominent theoretical atomic and nuclear physicist, former chair of the Physics Department at University of North Carolina at Chapel Hill and co-founder of the Triangle Universities Nuclear Laboratory, died June 6 (Thursday) at UNC Memorial Hospital from complications following surgery. He was 92.

 

Born in Berlin, Germany, he moved with his family to Turkey in 1935, where they remained throughout World War II. It was there that Eugen obtained an undergraduate degree in physics at Istanbul University. In 1947, he immigrated to the United States, and by 1950 had earned his doctorate in physics at Harvard University. He became a naturalized U.S. citizen a short time later.


Trolling about the Internet, I came upon this rather late...unfortunate. Please forgive my negligence. The passing of great minds gives one pause.

Dr. Merzbacher was obviously an immigrant, and one that contributed mightily to this nation and our understanding of Quantum Mechanics and consequentially, the universe (with no small exaggeration). I studied quantum from a slightly older text I still own and cherish with all its highlights, margin notes and "dog ears." Strange how commodified our conversation has become, the only example of immigrants' impact as a group is the mention of one of the two founders of "Google."

 

Professor Merzbacher left a legacy behind him in the form of a text now in its third edition, introducing undergraduate and graduate students in physics to the subject so impactful on our modern era. It is a testiment, of what "good things [used to] come out of NC" (my home state) before its recent lurch into backwardness.


APS link: Eugen Merzbacher

A link to the third edition here; an embed/link of the second below:

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When we look up at the night sky, space is black as far as the eye can see. Yet, when we read novels about it or watch something on TV or in the movie theater, it is white beyond all comprehension.

When watching a work of science fiction on the big or small screen, people of color often find themselves asking:

"Where did we go?"

"Did some melanin-devouring plague attack all humanity?"

"Do zombies only like the dark meat?"

But that's Hollywood. While studio executives continue to show the world's multi-hued population through its monochromatic lens, the literary field of speculative fiction has become more diverse than ever. Whether it's horror, science fiction, or fantasy, steampunk or steamfunk (and let's not forget sword and soul), writers of color are producing quality works and accumulating accolades and awards every day.

Mothership: Tales from Afrofuturism and Beyond is a speculative fiction anthology celebrating this talented field with stories focusing on people of color.

Currently, we are running a fundraising campaign on Indiegogo to support the writers who are included in the anthology (Junot Diaz, NK Jemisin, Victor LaValle, Charles R. Saunders, Nisi Shawl, and more). Please check out the campaign, help fund, and/or spread the word. Any and all help is greatly appreciated.

Mothership Support the Writers Indiegogo Campaign

http://www.indiegogo.com/projects/mothership-tales-from-afrofuturism-beyond-support-the-writer-campaign/x/3875976

Meet the Writers:

http://mothershipconnect.com/mother-authors.html

Thank you for your time and consideration.

Bill Campbell

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I love History, but especially Black Historical History, and romance, hence my reason for writing Murder on Second Street: The Jackson Ward Murders. The six part novel is set in one of the most historic Negro neighborhoods in early 20th Century America, Jackson Ward, in Richmond, VA. Here’s a look at parts I and II. In part I, “Death Comes to the Ward,” it’s October 1, 1929. The body of Annie Hilks is found floating in the James River in Richmond, VA. The police don't pay much attention to it; it's just another Negro woman who probably took her own life. But within two weeks, the bodies of three more Negro women are found in various locations throughout Jackson Ward, a prominent Negro community in the City. This is bad for business, and with no other choice left to them, the community reaches out to the battle scarred Sy Sanford to solve the murders. Sy has three BIG problems: he's returned from the Great War with haunting nightmares, he blacks out periodically from drinking and he's in love with his beautiful, but physically abused married secretary, Lena Johnson. Reluctantly, Sy takes the case because, well, he needs the money. In part II, "The Dogwoods,” it's two weeks into October 1929, and the bodies of four more Negro women have been found in various locations throughout Jackson Ward . Sy Sanford is now on the trail of a very clever and unusual killer, but his illegal drinking habit and horrid nightmares of the battlefields of France may get in the way of saving his business, the love of his life and another Negro woman from being murdered. Death, love and History collide during the season of the dogwoods in part II of this six part novel, Murder on Second Street: The Jackson Ward Murders.” Catch up with all the drama and romance! Grab your e-book for Kindle at http://www.amazon.com/Murder-Second-Street-Jackson-ebook/dp/B00D9X5T6A/ref=pd_rhf_se_p_img_2_SC92.

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Dimple BEC...

The dimple trap in action - PW

The first Bose–Einstein condensate (BEC) to be cooled using just lasers has been made by a team in Austria. The process is much simpler, faster and more efficient than previous methods, which involve an extra stage of evaporative cooling. The scientists hope that their breakthrough will lead to more widespread use of BECs in various areas of physics, including atomic clocks and atom lasers.

 

A BEC is a dense cluster of atoms cooled so close to absolute zero that all of the atoms are in a single quantum state and can therefore be described by the same wavefunction. The first pure BEC was made in 1995 by Eric Cornell and Carl Wieman at JILA in Boulder, Colorado. Since then, BECs have been used – or proposed for use – to create atom circuits, rotation sensors, atom lasers and other novel devices.

 

Making a BEC traditionally involves the two-step cooling of a cloud of atoms contained in a magnetic trap. The first step is laser cooling. It involves choosing an electronic transition of the atom to be cooled and irradiating the atom cloud with laser light of an energy slightly below this transition. For the most energetic atoms trying to climb out of the trap, the laser light is blue-shifted to the transition frequency. These atoms can therefore absorb a photon, which pushes them back. It also promotes the atoms into the excited state. When the atom decays back to the ground state, it emits a photon of a higher energy than the one it absorbed. The overall effect is that the gas cools and becomes denser.

 

Physics World: Laser-cooled Bose-Einstein condensate is a first

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Bench Warmers...

Credit: Unidentified Appellation

bench warmer is the last thing any high school or college athlete ever wants to be. The person that "shows up"; always there; parents in the audience steaming because their kid didn't get any play on the court or field. Resentful when time is finally granted, they typically become a self-fulfilling prophesy of disaster, and promptly sat back down to sulk the rest of the game/season.

We can't afford that now, nor could we ever.

Our technological innovation is screaming past us literally at light speed. We're demanding faster, cheaper, more apps meaning smaller physical features in Silicon: FinFETs, Carbon Nanotubes - pushing towards and beyond the Moore's Law limit - needing less humans to design or manufacture it. Or at least, less of them in the USA. We need a real debate on these issues; not delay/stalling tactics that in a real game bore to tears, and everyone in the crowd goes home (accept the frustrated parents). No wonder congressional approval is slightly above snail sweat. Getting ye old standardized test scores up - "teaching to the test" ("we don't do that") is insane when all the other industrialized nations whipping our collective assets (as we sit on them) aren't doing it quite that way.

Socially, technologically we can't be bench warmers. As we go, so does the world. If the issue is employment hovering at 7 - 7.5% here, it's only exacerbated in other countries trying to "follow our lead." The season I used metaphorically is our current condition globally, our definitions of "unemployment" and none for "under-employment," or what "full employment" looks like going forward; our continuance of a moribund stratification and unequal social and educational system straight from 1953; our collective shoulder-shrug that other countries are coming on the academic court and running the boards on us.

And for the countries that are imitating us, they too, can't afford bench warmers...

Patrick Mylund Nielson: Our Technological Adolescence
OECD: Indicators 2012
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