Of Particular Significance

Author: Matt Strassler

A perfect storm of computer trouble (ok, maybe not perfect, but pretty darn good) has kept me from finishing any new articles, though this should come to an end this week. But while waiting for things to improve, I’ve been pointing your attention (here and here) to various signs that China, which is investing heavily in science and engineering, is catching up to the U.S. and its political and economic allies. The course I taught earlier this month, in which I gave an introduction to particle physics and to the Higgs field and particle, was followed by a couple of lectures by an economist teaching at Williams College, and he pointed me to one other article that I had not been aware of. This one is from the New York Times; I can’t vouch for its accuracy, and I don’t know anything about the main authors (Charles Duhigg and Keith Bradsher), so… buyer beware. The article has to do with the quintessential modern company: Apple.

Let me quote from the article, to pique your interest:

—

It isn’t just that workers are cheaper abroad. Rather, Apple’s executives believe the vast scale of overseas factories as well as the flexibility, diligence and industrial skills of foreign workers have so outpaced their American counterparts that “Made in the U.S.A.” is no longer a viable option for most Apple products.

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Another critical advantage for Apple was that China provided engineers at a scale the United States could not match. Apple’s executives had estimated that about 8,700 industrial engineers were needed to oversee and guide the 200,000 assembly-line workers eventually involved in manufacturing iPhones. The company’s analysts had forecast it would take as long as nine months to find that many qualified engineers in the United States.

In China, it took 15 days.

Companies like Apple “say the challenge in setting up U.S. plants is finding a technical work force,” said Martin Schmidt, associate provost at the Massachusetts Institute of Technology. In particular, companies say they need engineers with more than high school, but not necessarily a bachelor’s degree. Americans at that skill level are hard to find, executives contend. “They’re good jobs, but the country doesn’t have enough to feed the demand,” Mr. Schmidt said.

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“We shouldn’t be criticized for using Chinese workers,” a current Apple executive said. “The U.S. has stopped producing people with the skills we need.”

—

Of course, I’m cherry-picking out of a long article.  While these quotations do capture its dominant thread, that thread is woven together with several others.  I certainly don’t pretend to have the solution to the multi-faceted problems that it explores.  But I do think it is important that citizens of the U.S. and its friends  not have their heads in the sand, pretending nothing  is changing.   China isn’t just a huge, cheap, unskilled labor force; it also has a growing, highly-skilled labor pool, able already to out-compete its U.S. counterparts.  This is not an accident.  The Chinese government is making good choices.  Perhaps the experts in China have learned from South Korea; anyone ever heard of Samsung?  If you think all Samsung does is copy Apple’s phones, your head is in the sand.  Look it up.

We live in a world dominated by science, engineering and technology.  If we lose our edge in these areas, we may, in the long term, find ourselves no longer important players in that world, with economic and political costs that could be very high indeed.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON June 24, 2013

While we’re on the subject of China… The US has had space stations for decades, and people here now show limited interest, barely caring that the US currently has no rocket that can carry people to space.  Now China has its own rockets and space station, and, with plenty of excitement and national pride, is putting them to good use.

Yesterday, some 60 million Chinese children watched a presentation and discussion from space, involving astronaut Wang Yaping and a Beijing classroom, on basic physics principles: mass versus weight, gyroscopic motion, etc.

I hope she managed to explain that there is gravity in space…

Note Added: The full lecture, with English voice-over, is available here: http://www.youtube.com/watch?v=OUAuZnpoZ58.  Thank you, Yan Wenbin.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON June 20, 2013

Today, two articles that I found especially interesting and that I recommend to you:

China’s Tianhe-2 retakes fastest supercomputer crown: A China-based supercomputer has leapfrogged rivals to be named the world’s most powerful system.

This article caught my eye because I think it highlights the degree to which China is rapidly catching up with Europe, the United States and Japan on certain technologies that matter a great deal.  China, unlike the US, which has been generally cutting its scientific spending since around 2000, is putting a tremendous amount of its money into science and engineering, aiming to surpass the world’s current technology leaders. Though they’re still making their way forward, their efforts are starting to pay off.  Since supercomputers are widely used in developing new technology (e.g., simulating novel aircraft), leadership in supercomputers, should they attain it, will have many benefits for the Chinese economy and military.  Lest you think they are merely copying what others have already done, you should make sure to read the last half of the article. Will it take another Sputnik moment to make anti-scientific politicians properly nervous about the cost of falling behind?

The second article of interest was this one (though the headline is a bit overstated…)

Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions:  Berkeley Lab scientists and their colleagues have discovered the properties that made ancient Roman concrete sustainable and durable

This great story evokes the tragic romance of knowledge lost for centuries — along the lines of the Stradivarius violins that no violin maker today can match. And it weaves several interesting strands.  First is the fact that modern concrete begins to fall apart in seawater in half a century, while the Romans managed to make a concrete that can survive seawater for two millenia.  How did they do it?  

Well, that’s the second interesting part: researchers claim to have figured it out, using one of the most modern of scientific techniques — flashes of ultraviolet or X-ray light, emitted by high-energy electrons traveling at nearly light-speed, in a particle accelerator (the Advanced Light Source). The Advanced Light Source is located at Lawrence Berkeley Laboratory, in the hills above the university we call “Berkeley” (officially the University of California at Berkeley).

The third interesting thing: the researchers learned that the Romans’ concrete, made mainly from lime (from limestone) and volcanic ash (pulverized rock created in abundance during any energetic volcanic eruption), used less lime and was formed at much lower temperatures than modern concrete. If modern concrete were replaced (when appropriate and possible) with a similar material, its production would use much less energy. And since concrete production is a notable contributor to overall energy use, this is not a minor effect.  In short, it’s just possible that this could be one of those rare situations where everyone wins: either the Roman concrete, or, more likely, a modern/ancient hybrid, may turn out to be more durable, more fuel-efficient to produce, and perhaps cheaper than the forms of concrete we use today.  

Thank goodness! The US government is still funding some important research!  Oh.  Right.  I guess it should be mentioned that initial funding for this work came from King Abdullah University of Science and Technology in Saudi Arabia.  Apparently they have a lot of volcanic ash lying about…

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON June 19, 2013

I’m back, after two weeks of teaching non-experts in a short course covering particle physics, the Higgs field, and the discovery of the Higgs particle.  (The last third of the course, on the politics and funding of particle physics and science more broadly, is wisely being taught by a more disinterested party, an economist with some undergraduate physics background.)  And I’ve been reminded: One of the great joys (and great secrets) of teaching is that the teacher always learns more than the students do.

At least, this is generally true for a new class that the teacher hasn’t taught before. In many university physics departments, and elsewhere, there is an informal requirement that professors teach a class no more than three years in a row. [Let us ignore for the moment that all of this will be overturned in the coming years by the on-line revolution; we can discuss the possible consequences later.] After the third year, they are expected to switch and teach something else. Now you might think that the benefits of the division of labor would suggest a different approach; after all, shouldn’t each professor perfect a course, become the expert, and teach it year in, year out? This usually doesn’t work (though there are exceptions) because each professor’s interaction with a new course has a natural life cycle. (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON June 17, 2013

This week and next, I’m very busy preparing and delivering a new class (four lectures, 1.5 hours each), for a non-technical audience, on the importance of and the discovery of the Higgs particle.  I’ll be giving it in Western Massachusetts (my old stomping grounds).  If it goes well I may try to give these lectures elsewhere (and please let me know if you know of an institution that might be interested to host them.)   Teaching a new class for a non-technical audience requires a lot of concentration, so I probably won’t get too much writing in over that period.

Still, as many of you requested, I do hope soon to follow up last week’s article (on how particle physicists talk about the strength of the different forces) with an article explaining how both particles and forces arise from fields — a topic I already addressed to some extent in this article, which you may find useful.

Now — a few words on the flap over the suggestion that math Ph.D. and finance expert Eric Weinstein, in his mid-40s, may be the new Albert Einstein.  I’ve kept my mouth shut about this because, simply, how can I comment usefully on something I know absolutely nothing about?  (Admittedly, the modern media, blogosphere and Twitter seem to encourage people to make such comments. Not On This Blog.) There’s no scientific paper for me to read.  There’s no technical scientific talk for me to listen to.  I know nothing about this person’s research.  All I know so far is hearsay.  That’s all almost anyone knows, except for a few of my colleagues at Oxford — trustworthy and experienced physicists, who sound quite skeptical, and certainly asked questions that Weinstein couldn’t answer... which doesn’t mean Weinstein is necessarily wrong, only that his theory clearly isn’t finished yet.  (However, I must admit my expert eye is worried that he didn’t have ready answers to such basic questions.)

What I do know is that the probability that Weinstein is the new Einstein is very low.  Why?  Because I do know a lot about how very smart people with very good ideas fail to be Einstein.  It’s not because they’re dumb or foolish. (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON June 3, 2013

Particle physicists, cataloging the fundamental forces of nature, have named two of them the strong nuclear force and the weak nuclear force. [A force is simply any phenomenon that pushes or pulls on objects.] More generally they talk about strong and weak forces, speaking of electromagnetism as rather weak and gravity as extremely weak.  What do the words “strong” and “weak” mean here?  Don’t electric forces become strong at short distances? Isn’t gravity a pretty strong force, given that it makes it hard to lift a bar of gold?

Well, these words don’t mean what you think.  Yes, the electric force between two electrons becomes stronger (in absolute terms) as you bring them closer together; the force grows as one over the square of the distance between them.  Yet physicists, when speaking their own language to each other, will view this behavior as what is expected of a typical force, and so will say that “electromagnetism’s strength is unchanging with distance — and it is rather weak at all distances.

And the strength of gravity between the Earth and a bar of gold isn’t relevant either; physicists are interested in the strength of forces between individual elementary (or at least small) particles, not between large objects containing enormous numbers of particles.

Clearly there is a language difference here… as is often the case with words in English and words in Physics-ese.  It requires translation.  So I have now written an article explaining the language of “strong” and “weak” forces used by particle physicists, describing how it works, why it is useful, and what it teaches us about the known forces: gravity, electromagnetism, the strong nuclear force, the weak nuclear force, and the (still unobserved but surely present) Higgs force. (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON May 31, 2013

I’ve finished (more or less) a version of the promised article on IceCube — the giant neutrino experiment that may have made a major discovery, as announced last week, and that had an opportunity to make another a few weeks ago (though apparently nature didn’t provide).  The article is admittedly a bit rushed (darn computer trouble) and therefore a bit rough, and it also leaves out some more subtle points that may become important in the future — but I think it’s complete enough to help explain how IceCube made their most recent measurements.  As usual, please send comments and questions, and I’ll work on it further.

Here’s the link to the article.  You may also find it interesting to read more generally about how neutrinos are detected, and about the weird story of neutrino types, and how they can oscillate from one type to another as they travel.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON May 23, 2013

I was sent or came across a few interesting links that relate to things covered on this blog and/or of general scientific interest.

It was announced yesterday that the European Physical Society 2013 High Energy Physics Prize was awarded to the collaboration of experimental physicists that operate the ATLAS and CMS experiments that discovered a type of Higgs particle, with special mention to Michel Della Negra, Peter Jenni, and Tejinder Virdee, for their pioneering role in the development of ATLAS and CMS.  Jenni and Virdee are both at the LHCP conference in Barcelona, which I’m also attending, and it has been a great pleasure for all of us here to be able to congratulate them in person .

One thing that came up a couple of times regarding weather forecasting (for instance, in forecasting the path of Hurricane Sandy) is that the European weather forecasters are doing a much better job of predicting storms a week in advance than U.S. forecasters are.  And I was surprised to learn that one of the the main reasons is simple: U.S. forecasters have less computing power than their European counterparts, which sounds (and is) ridiculous.  The new director of the U.S. National Weather Service, Louis Uccellini, has been successful in his goal of improving this situation, as reported here.  [Thanks to two readers for pointing me to this article.]

One of the possible interpretations of the new class of high-energy neutrinos reported by IceCube (see yesterday’s post) is that they come from the slow decay of a small fraction of the universe’s dark matter particles, assuming those particles have a mass of a couple of million GeV/c². [That’s much heavier than the types of dark matter particles that most people are currently looking for, in searches that I discussed in a recent article.]  I didn’t immediately mention this possibility (which is rather obvious to an expert) because I wanted a couple of days to think about it before generating a stampede or press articles.  But, not surprisingly, people who were paying more attention to what IceCube has been up to had recently written a paper on this subject.  [Here’s an older, related paper, but at much lower energy; maybe there are other similar papers that I don’t know about?]  At the time these authors wrote this paper, only the two highest energy neutrinos — which have energies that, within the uncertainties of the measurements, might be equal (see Figure 2 of yesterday’s post) — were publicly known.  In their paper, they predicted that (just as any expert would guess) in addition to a spike of neutrinos, all at about 1.1 million GeV, one would also find a population of lower-energy neutrinos, similar to those new neutrinos that IceCube has just announced. So yes, among many possibilities, it appears that it is possible that the new neutrinos are from decaying dark matter.  If more data reveals that there really is a spike of neutrinos with energy around 1.1 million GeV, and the currently-observed gap between the million-GeV neutrinos and the lower-energy ones barely fills in at all, then this will be extremely strong evidence in favor of this idea… though it will be another few years before the evidence could become convincing.  Conversely, if IceCube observes any neutrinos near but significantly above 1.1 million GeV, that would show there isn’t really a spike, disfavoring this particular version of the idea.

Regarding yesterday’s post, it was pointed out to me that when I wrote “The only previous example of neutrinos being used in astrophysics occurred with the discovery of neutrinos from the relatively nearby supernova, visible with the naked eye, that occurred in 1987,” I should also have noted that neutrinos were and are used to understand the interior of the sun (and vice versa).  And you could even perhaps say that atmospheric neutrinos have been used to understand cosmic rays (and vice versa.)

In sad news, in the “all-good-things-must-come-to-an-end” category, the Kepler spacecraft, which has brought us an unprecedented slew of discoveries of planets orbiting other stars, may have reached the end of the line (see for example here), at least as far as its main goals.  It’s been known for some time that its ability to orient itself precisely was in increasing peril, and it appears that it has now been lost.  Though this has occurred earlier than hoped, Kepler survived longer than its core mission was scheduled to do, and its pioneering achievements, in convincing scientists that small rocky planets not unlike our own are very common, will remain in the history books forever.  Simultaneous congratulations and condolences to the Kepler team, and good luck in getting as much as possible out of a more limited Kepler.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON May 17, 2013

IceCube [here’s my own description of the experiment], the big high-energy neutrino experiment cleverly embedded into the ice at the South Pole, announced a very interesting result yesterday, following on an already interesting result from a few weeks ago, one that I failed to cover properly. They have seen the highest-energy neutrinos ever observed, ones that, unlike previously observed high-energy neutrinos, appear not to be generated by cosmic rays hitting the top of the atmosphere. Instead, they apparently come from new sources far out in space. And as such, it tentatively appears that they’ve opened up, as long anticipated, a new era in neutrino astronomy, in which high-energy neutrinos will be used to understand astrophysical phenomena!

[The only previous example of neutrinos being used in astrophysics occurred with the discovery of neutrinos from the relatively nearby supernova, visible with the naked eye, that occurred in 1987. But those neutrinos had energies millions of times smaller than the ones discussed here.  And there was hope that IceCube might see neutrinos specifically from gamma-ray bursts, including the one that occurred just two weeks ago; but that appears not to have happened.]

I don’t understand certain details well enough yet to give you a careful explanation — that will probably come next week — but here’s an early description (and expert readers are strongly encouraged to correct any errors.) (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON May 16, 2013

I’m still seeing articles in the news media (here’s one) that say that the majority of Americans think the recent sequester in the US federal budget isn’t affecting them. These articles implicitly suggest that maybe the sequester’s across-the-board cuts aren’t really doing any serious damage.

Well, talk to scientists, and to research universities and government laboratories, if you want to hear about damage.

I haven’t yet got the stomach to write about the gut-wrenching destruction I’m hearing about across my own field of particle physics — essential grants being cut by a quarter, a third, or altogether; researchers being forced to lay off long-standing scientific staff whose expertise, of international importance, is irreplaceable; the very best postdoctoral researchers considering leaving the field because hard-hit universities across the country won’t be hiring many faculty anytime soon… There’s so much happening simultaneously that I’m not sure how I can get my head around it all, much less convey it to you.

But meanwhile, I would like to point you to a strong and strongly-worded article by Eric Klemetti, a well-known blogger and professor who writes at WIRED about volcanoes.  Please read what he wrote, and consider passing it on to those you know.  Everyone needs to understand that the damage that’s being done now across the U.S. scientific landscape, following a period of neglect that extends back many years before the recession, will last a generation or more, if it’s not addressed.

These deep, broad and sudden cuts are a short-sighted way of saving money.  Not only do they waste a lot of money already spent, the long-term cost of the permanent loss of expertise, and of future science and technology, is likely to exceed what we’ll save.  It’s not a good approach to reducing a budget.  So tell your representatives in Congress, and anyone who will listen: Scientific research isn’t excess fat to be chopped off crudely with a cleaver; it’s fuel for the nation’s future, and it needs wiser management than it’s receiving.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON May 15, 2013

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