Physics
drorzel | June 24, 2011I kicked off the week with a grumpy post about the Guardian's flawed list of great non-fiction, so let's end the week with a slightly more upbeat take on the same basic idea. The New York Times did a slightly lighter list, asking their staff to pick favorite nonfiction. The lack of consensus is pretty impressive, but the list is still heavy with books that are famous-- even if you haven't read them (I mostly haven't), you'll recognize the titles.
So, famous works of non-fiction are pretty well covered. Which leaves non-famous non-fiction as a decent bloggy topic. So:
What are some of your…
drorzel | June 23, 2011A scientific theory hasn't really arrived until the cynical and unscrupulous find a way to use it to extract money from the credulous and gullible. This has posed a significant obstacle for general relativity, dealing as it does with gravity, which requires really gigantic masses to produce measurable effects. That makes it a little difficult to sell wacky general relativity-based schemes to people.
Until now, anyway-- recent advances in atomic clocks have made it possible to see relativistic effects on a human scale. There was a really nice talk on this experiment in the fundamental symmetry…
drorzel | June 23, 2011(This post is part of the new round of interviews of non-academic scientists, giving the responses of Carl Knutson, who works for a company making online learning systems. The goal is to provide some additional information for science students thinking about their fiuture careers, describing options beyond the assumed default Ph.D.--post-doc--academic-job track.)
1) What is your non-academic job?
am the physics content project manager for an online homework and
learning environment provider, Sapling Learning, located in Austin,
TX. We offer online homework and tutorials for undergraduate…
drorzel | June 21, 2011Josh Rosenau has a post about the supernatural, spinning off recent posts about a recent Calamities of Nature webcomic. Josh makes a point that I think is valid but subtle:
The issue with the supernatural is not whether it's part of the universe, but whether it is bound by the same laws as all the other elements of the universe. The bizarre claim about ghosts is that they somehow obey some laws but not others, for no obvious reasons.
Something supernatural could, in principle, interact with the universe sometimes but not at others. If it is operating outside of natural laws, that doesn't…
drorzel | June 21, 2011Via Inside Higher Ed, a professor in New Jersey took the whole social media thing to the next level:
A Fairleigh Dickinson University physics professor is in custody for allegedly running a prostitution website involving about 200 women and more than 1,200 johns, police said Monday.
David Flory of New York City, who teaches on the FDU-Metropolitan campus in Teaneck, was arrested Sunday while sitting in a Starbucks in Albuquerque, N.M., said Lt. William Roseman of the Albuquerque police. Flory, who ran the site mostly from New York, owned a vacation home in Santa Fe, N.M., Roseman said.
Flory…
esiegel | June 17, 2011"What we observe is not nature itself, but nature exposed to our method of questioning." -Werner Heisenberg
Looking down at the fundamental nature of matter, down past our cells and organelles, deep into the individual molecules and inside of the atoms that make them up, at long last, you get to things like the fundamental particles that make up all the known matter in the Universe.
Things like electrons, photons, and the quarks that make up protons and neutrons, are all, as best as we can tell, fundamental particles. That means we can't break them up into anything smaller; they're not "made…
drorzel | June 17, 2011Alternate, More-Interesting Post Title: Attack of the Vampire Physicists.
I realized today that the only time I have been outside during daylight hours on this trip to Atlanta was during the brief walk down the platform to the airport entrance. This is only a little unusual for a DAMOP-- the Marriott Marquis is connected to a small mall by an enclosed walkway, so it was possible to leave the hotel and grab lunch in the food court without having to set foot outside. Other than that, I only left the hotel to go to dinner Tuesday and Wednesday, and that was on the late side, and hardly counts.…
esiegel | June 16, 2011"He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast." -Leonardo Da Vinci
It's often lonely, these days, as a theorist. As soon as most people hear the word theory, in fact, they start thinking about something like this:
Image credit: F. Steiger.
But if you're scientifically minded, you know just how powerful your theory is. Because your theory - if it's any good - allows you to not only explain what you've already seen, but allows you to predict something new, which you can then go look for.
By the early…
drorzel | June 16, 2011One of the odd things about going to conferences is the unpredictable difference between talks and papers. Sometimes, when you go to a talk, you just get an exact repetition of what's in the paper; other times, you get a new angle on it, or some different visual representations that make something that previously seemed dry and abstract really click. And, of course, sometimes you get new hot-off-the-apparatus results that haven't made it into print yet.
Maddeningly, there doesn't seem to be any way to know in advance which of these things you're going to get from the title and abstract. It…
drorzel | June 15, 2011Tuesday at DAMOP was dominated by my talk. Well, in my mind, at least. I suppose people who aren't me saw other interesting things.
OK, fine, I did go to some other sessions. I would link to the abstracts, but the APS web site is having Issues this morning.
In the Prize Session that always opens the meeting, Gerry Gabrielse from Harvard gave a really nice talk about his work on measuring the anomalous magnetic moment of the electron. This is the "g-factor" that I've cited before in calling quantum physics the most precisely tested theory in the history of science. Gabrielse is the guy behind…
drorzel | June 14, 2011That's the title of my talk this morning at DAMOP, where I attempt the slightly insane feat of summarizing a meeting with over 1000 presentations in a single 30-minute talk. This will necessarily involve talking a little bit like the person reading the legal notices at the end of a car commercial, and a few of the guide-to-the-meeting slides will have to flash by pretty quickly. Thus, for the benefit of those who have smartphones and care about my categorization of talks, I have put the slides on SlideShare in advance, and will embed them here:
What's So Interesting About AMO Phyiscs?…
drorzel | June 13, 2011You may or may not have noticed that I've been making a concerted effort to do more ResearchBlogging posts explaining notable recent results. I've been trying to get at least one per week posted, and coming fairly close to that. I've been pretty happy with the fake Q&A format that I've settled into, and while they're time-consuming to write, they're also kind of fun.
This past week, alas, was kind of brutal, as I was doing a ton of reading in preparation for my DAMOP talk tomorrow, which, in retrospect, is kind of insane, and SteelyKid's day care being closed for two days didn't help (…
drorzel | June 13, 2011Right around the time I sent in the manuscript for my own book explaining relativity to Emmy, I got an email offering me a review copy of The Manga Guide to Relativity, part of a series of English translations of Japanese comic books explaining complicated concepts in a friendly way. That was clearly too good a wind-down read to pass up.
Like other books in the series, this sets up a manga-type plot that just happens to require introducing relativity. In this case, on the last day of school at Taigai Academy, headmaster Rase Iyaga makes a surprise announcement: that he will throw a dart at…
drorzel | June 10, 2011If you look at the schedule of events for DAMOP next week, you will see that there is a movie showing scheduled for Tuesday night: Real Genius. This seems like an excellent excuse to run a poll:
Real Genius is:survey software
While the meeting will largely involve quantum mechanics, this is a purely classical poll, so you can choose only one answer, not a superposition of multiple answers.
drorzel | June 9, 2011While it is not yet officially summer, according to astronomers and horologists, it was approximately the temperature of the Sun here in Niskayuna yesterday, so de facto summer has begun. Accordingly, we have acquired a pool:
Of course, one of the main things you do with a pool is to sit next to it and read in the sun (note the conveniently positioned chair). Of course, then the question becomes "What do you read?
While the obvious answer is How to Teach Physics to Your Dog (now in paperback!), we got a good thread out of non-obvious suggestions for science-related "beach reading" last year…
drorzel | June 9, 2011One of the many things I've been occupied with the last few weeks has been arranging a reception at next week's Division of Atomic, Molecular, and Optical Physics (DAMOP) meeting. I was late in asking about the possibilities for this, so it won't make it to the printed program, which means I need to advertise by word of mouth. So:
What: An informal reception for people attending the DAMOP meeting who are associated with undergraduate institutions (i.e., small colleges, or non-Ph.D. granting universities), or thinking about pursuing a position at an undergraduate institution.
Why: Over the…
drorzel | June 8, 2011A few years ago, we switched to the Matter & Interactions curriculum for our introductory classes. This has not been without its hiccups, among them the fact that there has been a small decline in the conceptual learning gains measured by the Force Concept Inventory, the oldest and most widely used of the conceptual tests favored by the Physics Education Research community. We've spent some time discussing whether this is a temporary glitch, due to the transition, or something inherent in the curriculum. (Our numbers are small enough that these results remain at the level of plural…
drorzel | June 7, 2011I have to admit, I'm writing this one up partly because it lets me use the title reference. It's a cool little paper, though, demonstrating the lengths that physicists will go to in pursuit of precision measurements.
I'm just going to pretend I didn't see that dorky post title, and ask what this is about. Well, it's about the trapping and laser cooling of thorium ions. They managed to load thorium ions into an ion trap, and use lasers to lower their temperature into the millikelvin range. At such low temperatures, the ions in the trap "crystallize."
So, they've demonstrated that if you get…
drorzel | June 7, 2011Over at Dynamics of Cats, chief herding theorist Steinn has a post on what we know about how to teach physics:
To teach physics well, you provide an intensive, mathematically rigorous in-sequence series of classes.
You need at least two different parallel classes per term, each class a prerequisite for the succeeding class and coordinated syllabii for parallel and successive classes, providing an initial short review of the previous material.
You also need a parallel sequence of coordinated mathematics classes, such that the mathematics needed for a physics class are taught before it is…
catdynamics | June 6, 2011There has been a lot of effort to try to figure out how to teach physics better, at the university level, in the US.
Of course, we know perfectly well how to do that.
To teach physics well, you provide an intensive, mathematically rigorous in-sequence series of classes.
You need at least two different parallel classes per term, each class a prerequisite for the succeeding class and coordinated syllabii for parallel and successive classes, providing an initial short review of the previous material.
You also need a parallel sequence of coordinated mathematics classes, such that the…