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Final Notes on a Toy Model of the Arrow of Time [Uncertain Principles]

27 February, 2012 - 19:20

We're in the home stretch of this term, and it has become clear that I won't actually be using the toy model of the arrow of time I've talked about in the past in my timekeeping class this term. These things happen. Having spent a not-insignificant amount of time playing with the thing, though, I might as well get a final blog post about it, with something that sort-of worked and something that shows why I'm not a computational physicist:

First, the thing that sort-of worked: in thinking about trying to use the code I wrote, I was struggling to come up with a way to quantify the apparent irreversibility of the evolution of my toy system for larger numbers of "particles" in a relatively non-technical way that might be comprehensible for non-physicists. After a bit of thinking, I realized that there's an easy-ish way to do this, because the system has an easily calculated maximum entropy, which it ought to converge to. And empirically, when I start it going, it shoots up toward the maximum, and then noodles around up there, with occasional downward fluctuations as more "atoms" randomly end up on one side or the other.

To quantify the number and amount of those downward fluctuations, I realized I could just use the number of points dropping below various fractions of the maximum entropy, once the system got close to the maximum value. Which led to this graph:

arrow_time_all.PNG

To get these, I ran for 100,000 time steps, throwing out the first 1000 (as the entropy climbed upward from the initial low-entropy state with all the "atoms" in the left half of the array), and set up some simple counters that recorded the number of time steps where the entropy was below 90%, 75%, and 50% of the maximum possible for that number of lattice sites and atoms.

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Categories: Education

Not Your Daddy's Science Classroom! [USA Science and Engineering Festival: The Blog]

27 February, 2012 - 16:00

By Stacy Jannis

Thumbnail image for classroom1950.jpgExciting things are happening in 21st century classrooms all over our country. Teachers and students are using cutting-edge technology, working in teams, and connecting and sharing projects with classrooms all over the world. Innovative groups like the Concord Consortium , Promethean World , Project Lead the Way and Epals are at the forefront of creating the curriculum, software, tools and environment of tomorrow's classroom, today. A rich and exciting mix is brewing, one that combines multimedia, digital simulations, games, computer programming, inquiry and project-based learning, to accelerate our children's skills to think creatively, work collaboratively, and train to tackle 21st century problems.

Can we save the world through science and engineering? We think so! We are inspired by the excellence and passion for science and science education that takes place in innovative classrooms all over the country, every day.

A 6th grade classroom at Friends School Haverford took up this challenge as part of the Kavli Science Video Contest. As a class, they researched, brainstormed ideas, and focused on topics including energy, health, and the environment. Then they let their creativity go wild, including writing and recording original music, animations, and video. Here's what some of the kids said on the last day of the project:

"This project has changed how I think about science. I knew science could cure sickness and diseases, but I never realized science could save the world."

"I really got a better understanding of what science can do."

"I already thought [science] was fun and important but doing this project made me think about science as a way to change the world."

"Science isn't always just researching, working in the lab, or finding solutions to problems every day. Science can be fun and exciting."

The Kavli Science Video Contest challenges students to investigate how science and engineering saves our world, and answer the central theme creatively.
Grades 6-12 students compete for the chance to win $2000 (first prize) and a travel stipend to Washington DC to attend the festival. The winners are also honored in an awards ceremony, hosted by Bill Nye, as part of the festival.

Our central theme, or driving question, is how to "Save the World through Science and Engineering". Students make a short video( :30-:90) that shows how scientific discoveries and inventions can improve our lives and change our world, either right now or in the future. Enter by Mar. 21, 2012.

Click here to read more about the Festival and the Kavli Video Contest.

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Categories: Education

Space Chronicles: Neil deGrasse Tyson's New Book [Greg Laden's Blog]

27 February, 2012 - 13:52

9780393082104_custom.jpgNeil deGrasse Tyson has a new book out: Space Chronicles: Facing the Ultimate Frontier. It is (as one might guess) about space exploration, and assembles earlier speeches and writings with some new stuff. This is an interesting time to be talking about the space program, as NASA seems to be producing new results ever week, there are large and small space robots on their way to distant orbs, or soon to be launched, we are on the verge of understanding the potential of life on Mars on a basic level, we are finding more earth-ish Exoplanets and at the same time the sky is falling, or at least, trashed with litter from one of the most significant, direct and obvious side effects of the space program: We humans get to ruin not just the air and the sea and the land, but also, near space!

From a recent NPR interview:

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Categories: Education

How to Teach Relativity to Your Dog in the Wild [Uncertain Principles]

27 February, 2012 - 01:49

Hey, you might not know this, but I wrote a book...

The official release date for How to Teach Relativity to Your Dog isn't until Tuesday, but a friend reported buying a copy in Missouri, so when I was headed out to do some work this afternoon, I went to the cafe at the local Barnes&Noble so I could check for myself, and there it was:

relativity_in_store.jpg

That's How to Teach Relativity to Your Dog spotted in the wild. I'm not going to say "in its natural habitat," because it's really a domestic animal, which belongs in a loving home, with people to care for it. Copies in the bookstore are feral editions, which need to be tracked down, taken in, and adopted.

So, please, head down to your local store, and take one home, won't you? You could even arrange to have one sent directly to you, from one of the nice retailers linked at DogPhysics.com...

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Categories: Education

Con or Bust Auction Nearing Its End [Uncertain Principles]

25 February, 2012 - 14:13

Once again, Kate is running an auction to benefit the Con or Bust project providing financial support for fans of color(*) to attend science fiction/ fantasy conventions. The auction is run via LiveJournal, with a variety of cool items on offer in individual posts to that community, with an overall index here.

Among the items on offer are signed copies of How to Teach Relativity to Your Dog and How to Teach Physics to Your Dog (in your choice of several languages). You can also bid on some of our excess books.

Bidding ends at midnight Sunday, so you've got a little time left. Check out the lists of stuff, and get your bids in soon.

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Categories: Education

On Cox vs. Swans [Uncertain Principles]

24 February, 2012 - 19:57

The other controversial thing this week that I shouldn't get involved in is the debate over whether Brian Cox is talking nonsense in a recent discussion of the Pauli Exclusion Principle. Tom at Swans on Tea kicked this off with an inflammatory title, and Cox turned up in the comments to take umbrage at that. Sean Carroll provides a calmer and very thorough discussion, the comments to which include a number of well-known science popularizers duking it out.

My take on it is basically the same as Tom and Jim Kakalios in Sean's comments: unless the two particles you're talking about are within about a de Broglie wavelength of each other, Pauli exclusion doesn't really matter. This was actually a question at my Ph.D. defense, because a big part of my thesis was about quantum statistical effects in ultracold collisions, where Pauli exclusion forbids certain types of collisions from taking place. When we think about that sort of thing, we require that the two colliding atoms be in an overall antisymmetric wavefunction, but we don't worry about the state of other atoms of the same element elsewhere in the apparatus, because they're so far away that they don't change the energy states available to the colliding atoms in any significant way.

In Tom's comments, Cox insists that hes right, and says that the whole thing is worked out in detail in his new book. I haven't read the new book, though I've been offered a copy by a publicist, so we'll see. I think Sean and Matt Leifer at comment #6 have covered pretty much all of the bases, though, so I'm inclined to think that Cox is just wrong. There may be a narrow philosophical sense in which he's correct, but I don't think it's useful, and given that there are large numbers of people working scams based on woo-woo notions of quantum phenomena enabling paranormal abilities, I think this is a bad direction to take popular quantum mechanics.

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Categories: Education

The Hubble Rate [Dynamics of Cats]

24 February, 2012 - 19:12


Is approaching 1 per minute and accelerating.

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Categories: Education

On Neutrinos and Cables [Uncertain Principles]

24 February, 2012 - 18:58

It's not a good week for me to be writing about anything remotely controversial, but if I want to keep my physics blogging license, I need to say something about the latest fast neutrino news. This has followed the usual trajectory of such stories, with the bonus farcical element of people who blasted the media for buying into the initial release seizing triumphantly on an initial rumor in the press that was garbled into incomprehensibility. With a little more time, it's become more clear how their result has become less clear, and the best place to look for a description of this is Matt Strassler's blog, where he has not just one, not just two, but three excellent posts on the news, laying out what's really going on.

Having written at the time that "if something is wrong with their experiment, it's something pretty subtle, because they've checked all the obvious problem areas carefully," though, I probably need to say something about whether this counts as "subtle." Because "look for loose wires" might seem too obvious to count as subtle, at least if you're not familiar with experimental physics.

If you are familiar with experimental physics, though, this definitely would count as "subtle," because real experiments aren't like block diagrams, with single wires running in and out of a single detector. In an experiment on this scale, you're probably talking about hundreds of individual cables connecting different boxes, and checking all of them is a non-trivial matter. What's more, there's nothing about their measurement that suggests a bad connection as the first thing you would look for-- a loose cable, particularly a fiber-optic cable, shouldn't produce tens of nanoseconds of signal delay unless by "loose" you mean "on the other side of the room from where it's supposed to be."

What's more, as Strassler notes, there are actually two timing issues, moving the signal in opposite directions. Fixing one would tend to reduce the apparent speed, while fixing the other would increase it, making matters worse. So the whole situation is, as Strassler says in the third post linked above, completely confused. At this point, it's not clear what if anything they can say about the apparent speed, other than that it's worth testing again in a new data run, with more neutrinos and more detectors, coming later this spring.

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Categories: Education

The Planet with Nowhere to Land [Starts With A Bang]

24 February, 2012 - 02:32

"Day after day, day after day,
We stuck, nor breath nor motion;
As idle as a painted ship
Upon a painted ocean.
Water, water, every where,
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink." -Samuel Taylor Coleridge, Rime of the Ancient Mariner Despite the discovery of dozens of worlds -- planets and moons -- in our own Solar System, as well as hundreds (soon to spill into the thousands) of confirmed planets orbiting other stars, our Earth is still unique.

6760135001_58b1c5c5f0_b.jpeg

(Image credit: The Suomi NPP Blue Marble, NASA / NOAA.)

At least, it's unique as far as we know.

A smaller, dense rocky world with not just continents, but also oceans and life, Earth is the only one of its kind. So far, that is. And yet given the huge variety of stars and worlds found to date, it makes you wonder just what sort of unusual places this Universe contains.

ann1114a.jpeg

(Image credit: NASA, ESA and G. Bacon (STScI).)

The first exoplanets found were Hot Jupiters: gas giant planets orbiting very close to stars even hotter and brighter than our own. And this is no surprise: it's much easier to detect large, heavy planets that are close to their parent star. Conversely, it's much more difficult to detect planets when they're any combination of smaller, lighter, or farther away from their parent star.

In the last few years, our technology has improved enough that we've found a vast variety of stars, from the smallest, coolest, reddest stars up through big, bright hot blue stars (and even a few red giants and supergiants) that have planets orbiting them. In the image below, all 2,326 exoplanet candidates discovered by the Kepler Mission are shown.

KeplerCandidates2326SunsRowe10000px.jpg

(Image credit: NASA's Kepler Science Team / Jason Rowe.)

Based on the temperature and luminosity of the star that's central to each of these solar systems, each planetary system has a region of space where -- according to our current knowledge of biology and chemistry -- life may be likely to arise. We call this region the Habitable Zone, and planets found within it are excellent candidates for the one Earthlike condition we prize over any other: liquid water.

Planets too close to their star, like Mercury in our own Solar System, are going to be too hot for this. Rocky worlds that are too far distant, like those out beyond Mars, will be too cold. We have reached the point where we've discovered solar systems other than our own that have planets in all three zones!

Gliese_581_-_2010-1.jpeg

(Image credit: wikimedia commons user Henrykus.)

Like the vast majority of stars in the galaxy, the parent star of the exoplanet system above, Gliese 581, is a red dwarf star with less than 40% the mass of the Sun. While their habitable zones are tiny compared to the one around our Sun, there are already many excellent rocky planetary candidates found interior to and within their habitable zones.

In fact, the Kepler team has put together a tremendously illustrative video of all the candidate planets found. Have a look for yourself!

(Video credit: Kepler Exoplanet Candidates by blprnt.)

Now, if we were to rescale these raw distances, we'd find that there are a great number of planetary candidates closer to their star than Mercury is to the Sun that would be too cold to support life, but that -- by far -- the most common type of exoplanet found so far is still the one too close to its star to support Earth-like life.

But one of the most interesting things to consider is that not every solar system is going to have the same chemical composition as ours. How's that?

eso1207a.jpeg

(Image credit: La Silla Observatory / MPG / ESO.)

The way you form stars -- as the star forming region NGC 3324 illustrates -- is by collapsing molecular gas clouds down into regions with a central star and a protoplanetary disk. Over time, the atoms in the disk accrete into planets, with typically the densest elements closest to the parent star and the least dense elements the farthest away. It is no coincidence that Mercury, Venus, and the Earth (and Earth's Moon) have significantly higher densities than all other planets, moons, comets and asteroids in our Solar System.

But the reason we have as many heavy elements as we do is because the molecular cloud that formed us had enough enriched elements from deceased, previous generations of stars to form us. Stars that were formed much earlier in the Universe, as well as stars that formed later in less enriched regions, would have solar systems containing planets with much lower densities. Even the innermost planets.

hires.jpg

(Image credit: David A. Aguilar (CfA).)

And by measuring not just the mass and radius of the planet, but the star's light filter through the planet's atmosphere, we can measure the infrared color of "sunset" on the world, and hence determine the elemental composition of the planet's atmosphere!

What did they find? A thick, dense, featureless atmosphere composed primarily of water vapor! As the Harvard-Smithsonian Center for Astrophysics reports: "The Hubble measurements really tip the balance in favor of a steamy atmosphere," said [Zachory] Berta.

Since the planet's mass and size are known, astronomers can calculate the density, which works out to about 2 grams per cubic centimeter. Water has a density of 1 g/cm3, while Earth's average density is 5.5 g/cm3. This suggests that GJ1214b has much more water than Earth, and much less rock.

As a result, the internal structure of GJ1214b would be very different than our world.

"The high temperatures and high pressures would form exotic materials like 'hot ice' or 'superfluid water' - substances that are completely alien to our everyday experience," said Berta. That strong signal favoring an atmosphere composed 100% of water vapor is definitely there, as the signatures of models with significant other atmospheric components are clearly disfavored in Figure 10 (thanks, Michael Richmond) from the paper:

100_percent_water.jpg

(Image credit: Z. K. Berta et al.)

The conclusion that the planet has this uniform, thick H2O atmosphere around it indicates a large, watery chemical composition. The sheer amount of water indicated by this data -- combined with the information about the overall density of the planet -- renders a solid, rocky surface is inconceivable!

This world most likely is a waterworld, with a 100% oceanic surface!

1Ocean.jpeg

(Image credit: retrieved from Steven Andrew.)

This planet is likely to be at very different temperatures and pressures from Earth, and so will likely have unusual states of water. It should be constantly boiling (at an average temperature of 450 degrees Fahrenheit (230 Celsius), and there should be strange states of matter, like "hot ice" or "superfluid water" composing the surface/atmosphere.

There are stranger worlds out there than most of us have ever imagined, and this one orbiting this star -- GJ 1214 -- just 42 light years away, is the first super-Earth that's ever had its atmosphere detected.

I can't help but look on with awe, and enjoy wondering what else is out there!

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Categories: Education

I have a plan for faster-than-light travel now [Pharyngula]

24 February, 2012 - 01:23

Both Phil Plait and Sean Carroll are tentatively reporting that they may have an explanation for the recent anomalous report of neutrinos traveling faster than light: it may have been a case of a faulty connection in a timing circuit. If that bears out, it may be a bit embarrassing.

But it does suggest an important possibility. When we get around to building the first starship, don't have those fussy, punctilious physicists wire it up. Gather a gang of sloppy slapdash biologists to stick it together with spit and chewing gum. We'll have it going a heck of a lot faster than light than those experts can even imagine.

(Also on FtB)

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Categories: Education

Looking for the Bacon Boson [Uncertain Principles]

23 February, 2012 - 16:28

I'm grading exam papers at the dining room table when Emmy trots in. "Hey, dude," she says. "Where do we keep the superconducting wire?"

I'm not really paying attention, so I start to answer before I understand the question. "Hmm? Wire is in the basement, next to the--wait, what?"

"The superconducting wire. Where do we keep it?"

"We don't have any superconducting wire. And you're a dog. What do you need superconducting wire for, anyway?"

"I'm building a particle collider! I need superconducting wire for the beam-steering magnets."

How to Teach Relativity to Your Dog goes on sale next Tuesday, wherever you buy books. The above video is a dramatic reading of the dog dialogue that opens Chapter 8: Looking for the Bacon Boson; E = mc2 and Particle Physics. If you enjoy that, there are 11 more such conversations in the book, along with longer, more detailed explanations of the relevant physics.

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Categories: Education

Waterworld Discovered in Space [Greg Laden's Blog]

23 February, 2012 - 14:19

... Well, everything is in space, but I mean outer space!

Observations by NASA's Hubble Space Telescope have come up with a new class of planet, a waterworld enshrouded by a thick, steamy atmosphere. It's smaller than Uranus but larger than Earth.

Zachory Berta of the Harvard-Smithsonian Center for Astrophysics (CfA) and colleagues made the observations of the planet GJ1214b.

"GJ1214b is like no planet we know of," Berta said. "A huge fraction of its mass is made up of water."

The ground-based MEarth Project, led by CfA's David Charbonneau, discovered GJ1214b in 2009. This super-Earth is about 2.7 times Earth's diameter and weighs almost seven times as much. It orbits a red-dwarf star every 38 hours at a distance of 1.3 million miles, giving it an estimated temperature of 450 degrees Fahrenheit.

Details here

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Categories: Education

Alright, Neutrinos, The Jig Is Up! [Starts With A Bang]

22 February, 2012 - 23:38

"I have difficulty to believe it, because nothing in Italy arrives ahead of time."
-Sergio Bertolucci, research director at CERN, on faster-than-light neutrinos You know the story. Last year, the OPERA experiment at CERN announced, to the shock and surprise of practically everyone, that they had observed what appeared to be neutrinos moving faster than the speed of light.

How did the experiment conclude this? Let's refresh your memory.

fig1_sendem.jpeg

(Image credit: OPERA collaboration; T. Adam et al.)

A beam of high-energy protons, moving very close to the speed of light (but not quite there thanks to Einstein's relativity) is smashed into a target, creating a whole bunch of debris. Some of that debris consists of neutrinos (and unstable particles that will decay into neutrinos), which are incredibly light -- millions of times lighter than a single electron -- but not quite massless.

Because neutrinos hardly interact at all, we can fire them through the Earth pretty much at will. While all the other particles will be blocked by the particles in the ground, the neutrinos continue to travel as if in free-fall, affected only by the gravity of the objects around them.

Neutrino-Beam.jpeg

(Image credit: OPERA / INFN / CERN.)

From CERN, these neutrinos travel through around 732 kilometers of Earth, until they arrive at the OPERA detector, buried beneath the Italian mountain of Gran Sasso. The OPERA detector is huge, and that makes it good enough to detect about one out of every 1016 (that's ten quadrillion) neutrinos that pass through it.

DSC_0057_2_-2.jpeg

(Image credit: OPERA / INFN / CERN.)

Over the course of more than a year, OPERA detected somewhere around 16,000 of these neutrinos, measuring a number of their properties, including their arrival times. What they found, when they took a look at their data, was absolutely shocking. Based on how energetic these neutrinos were and how far they had traveled, they were able to calculate exactly how long it should have taken for these neutrinos to travel the distance between where they were created at CERN to when they arrived in the OPERA detector.

And the result should have been a time corresponding to a speed indistinguishable from the speed of light in a vacuum.

light_speed.jpeg

(Image credit: retrieved from Amazon S3.)

At least, that's what it should have been in theory, if physics behaves as we expect it to. What they found, instead, is that the neutrinos arrived about 60 nanoseconds early, which is incredibly fishy. This doesn't appear to happen for either significantly lower-energy or higher-energy neutrinos, as other experiments (and Matt Strassler) showed.

neutrinovelocitygraph.png

But when an experiment claims to have been done well and gives you a surprising result, you have to investigate exactly what's going on here. Now, we thought we understood neutrinos, and if we did, they shouldn't be arriving early. Certainly nowhere near this early. We immediately wondered if we were fooling ourselves with the results, and while some errors have been ruled out, there are still many questions remaining. The big one, of course is why did these neutrinos arrive earlier than we expected?

The OPERA collaboration could have made an experimental error that they haven't accounted for. (Some plausible explanations are as mundane as faulty wiring in the experiment.) This is sort of the default position that many people -- including myself -- take: that there's some error in the experiment somewhere. But this could also be an indicator of some potentially revolutionary new physics. If we want to know what's going on, you know how science works: we test it again, in different ways!

neutrinobeam.jpeg

(Image credit: T2K experiment, retrieved from Lancaster University.)

And that's exactly what's going on at two different locations, unconnected to the OPERA experiment. In Japan, they're creating neutrinos at similarly high energies to the OPERA experiment, and sending them from Tokai to Kamioka, over a distance of 295 kilometers.

We're also, in the United States, sending a beam of neutrinos underground from Fermilab to Soudan Mine in Minnesota. The distance from Fermilab to Soudan Mine? An uncanny -- wait for it -- 732 kilometers.

NOVA-Looking-North-large.jpeg

(Image credit: Univ. of Minnesota / NASA / Google / TerraMetrics / Europa Technologies.)

At the terminal point in both experiments, giant neutrino detectors await. Now, what they see will teach us a tremendous amount -- assuming that everyone is a competent experimentalist -- about what's going on with these neutrinos. Let's run through some of the most likely possibilities of what these experiments may see, and what that will point to!

Arrive-on-time1.jpg

(Image credit: Renee L. of 3inq.com.)

Option 1: MINOS neutrinos arrive on time, T2K neutrinos arrive on time.

This is perhaps the most boring option, and also perhaps the most expected. If neutrinos really don't move faster-than-light, and the OPERA collaboration achieved their results because of a unique fault in their experiment, the other collaborations won't see it. (This will also be what we see if the recent faulty cable theory turns out to be true.)

If this happens, the OPERA collaboration will be left with a lot of egg on their faces, and many jokes like Bertolucci's, at top, will ensue.

opera.jpeg

(Image credit: OPERA collaboration; T. Adam et al.)

Option 2: MINOS neutrinos arrive ~60 ns early, T2K neutrinos arrive ~60 ns early.

This possibility -- that everyone sees their neutrinos arrive about 60 nanoseconds early -- is also really interesting, although it could be happening for two very different reasons.

On one boring hand, everyone doing these experiments could be making the same systematic error. We've never done timing at this precision over these distances before, and there could be some sort of universal error related to the type of equipment or the setup used that affects everyone equally.

There are also some exciting, theoretical possibilities that the neutrinos travel incredibly fast initially, resulting in a very fast traversal of maybe the first 18 meters or so, followed by normal, roughly light-speed travel over the remaining distance. This idea, currently considered to be extremely fringe, would suddenly be thrust into the spotlight.

6a00d8341bf67c53ef014e8bc777bf970d-320wi.jpeg

(Image credit: Jennifer Ouellette.)

Option 3: MINOS neutrinos arrive 60 ns early, T2K neutrinos arrive 24 ns early.

If this happens, the idea that neutrinos move at some speed faster-than-light through the Earth, or that the Earth acts as a medium with an index of refraction slightly less than 1 for neutrinos, would gain a lot of traction. In other words, neutrinos in a vacuum would move at the speed of light, but neutrinos moving through the Earth somehow move faster than light in a vacuum by some small amount; maybe 0.0025% faster.

This would be incredibly interesting from a theoretical perspective, and is quite possibly the result that many of the OPERA experimentalists are hoping for; if this came to pass, theoretical physics would certainly be very busy trying to explain why this was happening.

calm-nobody-knows-what-they-are-doing.jpeg

(Image credit: Schuhlelewis.com.)

Option 4: MINOS neutrinos arrive some time other than on time or 60 ns early, T2K neutrinos arrive at some other time than on time, 24 or 60 ns early.

If this happens, we'll know that there are either experimental errors somewhere or some really bizarre theoretical things going on, but nothing that was reasonable to expect.

You can, of course, make your bets as to what you think is most likely, but there's a reason we do the experiments; don't state any definitive conclusions until the results come in! For my own part, the faulty cable theory is a pretty lame explanation that would be shocking at this point. We have to assume some base level of competence when experiments are performed, and it would be a tremendous blow to everyone involved if this turned out to be the culprit. But with the experiment at MINOS already running, we should have our first check, and hence the first information leading us towards a definitive answer in just a few months!

So if you want to know whether neutrinos are moving faster than light, whether there is there some new physics lurking in high-energy neutrinos, whether the Earth is a faster-than-light material to neutrinos, or whether this whole fiasco is just an experimental blunder, you have to stay tuned! Any guesses?

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Categories: Education

Faster Than Light Neutrinos Explained? [Greg Laden's Blog]

22 February, 2012 - 20:48

From Science Insider, there is a possible explanation for the recently observed "faster than light" neutrinos. The Neutrinos were clocked at faster-than-light speeds on their way form CRN in Switzerland to a detectors site in Italy. I had originally proposed that the neutrinos were merely very hungry but unwilling to eat Swiss food, and since they were on their way to Italy, why not go FTL?

The research at first was assumed to most likely be some kind of mistake, but a Mulligan Redo Procedure clearly demonstrated that the most obvious errors could not explain the observation, which violates The Laws of Physics.

It turns out that the reason that the Neutrinos appeared to go faster than the speed of light is exactly the same reason most of these things happen:

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Categories: Education

Space Buckyballs [Greg Laden's Blog]

22 February, 2012 - 18:04
PASADENA, Calif. -- Astronomers using data from NASA's Spitzer Space Telescope have, for the first time, discovered buckyballs in a solid form in space. Prior to this discovery, the microscopic carbon spheres had been found only in gas form in the cosmos.

Formally named buckministerfullerene, buckyballs are named after their resemblance to the late architect Buckminster Fuller's geodesic domes. They are made up of 60 carbon molecules arranged into a hollow sphere, like a soccer ball. Their unusual structure makes them ideal candidates for electrical and chemical applications on Earth, including superconducting materials, medicines, water purification and armor.

Details and more at NASA

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Categories: Education

This Month's STEM Advice Corner: Plant Biology [USA Science and Engineering Festival: The Blog]

22 February, 2012 - 16:00

Our mission is to re-invigorate the interest of our nation's youth in science, technology, engineering and math (STEM) by producing and presenting the most compelling, exciting, educational and entertaining science festival in the United States. In addition to the celebration, throughout the year we work to sustain the Science Festival's impact through year-round programming and curriculum development and a content-rich, interactive website. We strive to establish ourselves as a resource for everyone in the STEM community and especially our future STEM leaders.

One of the ways that we hope to achieve this is through our website feature: STEM Advice Corner. The STEM Advice Corner highlights careers in science and engineering. We host a new career each month and offer an in depth analysis on what it takes to pursue the given career path including the skills required to succeed; the details of the work performed and related careers in the field. This is a great resource for students pursuing careers in STEM!

This month our focus is on How to Grow a Career in Plant Biology! Students will see that it is fun to discover the active, useful, beautiful, eco-friendly, and even bizarre things plants can do! They will learn the skills required to excel in plant biology including curiosity, success in science and math and the motivation to pursue college and beyond.

Please visit the STEM Advice Corner to read more about this month's career focus: How to Grow a Career in Plant Biology!

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Categories: Education

Dog Physics: More Popular Than London Call Girls [Uncertain Principles]

22 February, 2012 - 14:44

A correspondent from the UK sends along this picture from the Waterstones outlet in Heathrow airport:

heathrow_rack.jpg

As you can see, How to Teach Quantum Physics to Your Dog is #55 on their bestseller rack, just ahead of Confessions of a London Call Girl. I'm not sure what this says about London call girls, but I'm pretty psyched that it's still selling well over there.

On this side of the Atlantic, I got a note from my editor at Scribner the other day that they've just printed another batch of the US paperback of How to Teach Physics to Your Dog, which is also good news. There's probably a blog post in the future about the sales numbers for that, because Amazon now makes BookScan numbers available, while Simon & Schuster make point-of-sale numbers available, giving me a nice way to test BookScan's claim to capture 75% of all sales.

And, of course, you might've heard somewhere that How to Teach Relativity to Your Dog will be released soon-- next Tuesday, to be precise (but who's obsessively counting days to that, anyway?). They were selling it at the AAAS meeting last week, and I heard that a very well-known physicist picked one up, which is cool. I know how many they shipped to stores, both here and in the UK, which is fairly substantial, so it should really be available "wherever books are sold," as the phrase goes. And there is an electronic edition, for those of you who snarkily disparage "legacy books," also on sale next Tuesday.

In terms of publicity, I've already linked most of the reviews. I'll be doing a signing at the Open Door in Schenectady on the 10th of March, and one at the B&N in Vestal, NY (closest big store to where I grew up) on the 24th. And one of the local papers, the Troy Record, just ran a five-question interview with me, though some of the responses got a little garbled (I don't have a thirteen-year-old, for example...).

And that's where things stand with the books. Which isn't a bad place to be standing, really.

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Categories: Education

Celestial Square One [Page 3.14]

21 February, 2012 - 19:11

On Dynamics of Cats, Steinn Sigurðsson flags a few foreboding articles on the future of NASA. Sigurðsson says the orbiting telescope Galex, or Galaxy Evolution Explorer, will be shut down later this year despite continuing to function. NASA has withdrawn from the international research mission known as ExoMars, and many other "2011-12 programs appear effectively suspended pending the 2012-13 budget, to the point where an entire funding cycle will be lost for some lines." Meanwhile, Ethan Siegel conjures up an apt scenario on Starts With a Bang, writing "Let's pretend that, for all of our history on Earth, we had never once bothered to look up with any instruments beyond what our own eyes could offer. [...] What would we find, today, if we turned our attention upwards for the first time ever?" From neighboring planets to the stars to extended nebulae and distant galaxies, our existing technology would allow us to peer deeper and deeper into the universe and quickly arrive at a conclusion that historically took centuries: the Big Bang theory. Of course, we've employed every technological advance every step of the way. There's something innately human about keeping an eye on the stars. And although old habits die hard, they also run out of money.

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Categories: Education

Extreme Dwarfism Computing [Dean's Corner]

21 February, 2012 - 17:36

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Brookesia micra sp. n. from Nosy Hara, northern Madagascar.

Imagine a supercomputer suitable for this cute little guy, the recently discovered Brookesia micra.

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Categories: Education

WebElements: the periodic table on the WWW [http://www.webelements.com/]

Copyright 1993-2011 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.