Physics
drorzel | June 18, 2009(Alternate post title: "Hey to James Nicoll")
Via John Dupuis, our clever neighbors to the North has come up with a possible (partial) alternative to rockets:
"For decades, scientists have been grappling to find a more efficient means of getting payloads into space," says Brendan Quine (right), professor of space physics and engineering in York's Faculty of Science & Engineering, who is heading the project. A paper detailing the design was recently published in the journal Acta Astronautica; it is co-authored by York space engineering Professor George Zhu and graduate student Raj Seth.
"…
drorzel | June 17, 2009Whether because I'm a blogger, or because I'm a previous recipient of their money (I suspect the latter), I recently got email from the Research Corporation announcing their new Scialog 2009: Solar Energy Conversion program:
Scialog will focus on funding early career scientists and building research teams to undertake groundbreaking studies in solar energy conversion. This initiative will be entitled Scialog 2009: Solar Energy Conversion.
Scialog 2009 will accept proposals describing fundamental research at the molecular and nanoscale level that show high potential to impact advanced energy…
esiegel | June 17, 2009By 1948, our view of the Universe had changed drastically from 1909. Instead of space being run by Newton's Gravity, where our Milky Way comprised the entire Universe, we had learned that space and time are governed by Einstein's General Relativity, that our Universe contained at least many thousands of other galaxies, and that the farther these galaxies were from us, the faster they moved away from us. In other words, the Universe was not only vast and full of interesting stuff, it was also expanding as it got older!
The prevailing idea of the day was the Perfect Cosmological Principle,…
drorzel | June 15, 2009Google the title phrase, and you'll find a bunch of New Age twaddle. This is a physics blog, though, so here's a reliable scientific method for finding the location of a rainbow, such as this one seen over Chateau Steelypips after the thunderstorms that went through earlier this evening (it was much brighter half a minute before the picture was taken, but faded as the camera was fetched):
Stand so you can see your shadow in front of you.
Spread the fingers on both hands, and hold them so your thumbs just touch.
Hold your hands so one pinky finger is just on the head of your shadow.
Keeping…
drorzel | June 15, 2009Martin Perl, a 1995 Nobel laureate in Physics for the discovery of the tau lepton, was awarded an honorary degree yesterday at commencement. Perl actually has a significant Union connection-- he started his career as a chemical engineer, and was working for GE making vacuum tubes when they sent him to take classes in calculus and atomic physics at Union. His physics professor, Vladimir Rojansky, convinced him that he was more interested in physics than chemical engineering, so he changed careers.
Saturday night, I had dinner with Perl, two other faculty members, and three students. He's just…
rallain | June 13, 2009Our German friends let us borrow their son's bike after he got too big for it. I guess it will still be called a "bike" because it has two wheels.
See. No pedals. We don't need no stinkin pedals. Really, this is a great way for kids to learn how to ride. They just start off kind of walking while sitting on it. As they go faster, they kind of get the hang of how to not fall over. As I have said before, this is counter intuitive - if you are falling to the right, turn to the right.
I don't know if you can get a bike like this in the U.S., maybe you just need to find a German friend. If…
rallain | June 12, 2009Jennifer over at Cocktail Party Physics has a nice post about her trip to Disneyland. The one ride that would be fun to play with (in terms of physics) would be the tower of terror. Think of the cool things you could do with a video camera during that ride. It would be like a mini-vomit-comet. Anyway, I want to talk about one part of Jennifer's post.
"As one would expect, this lifted us out of our seats slightly, as much as the straps would allow, and we got that one glorious moment of seeming weightlessness, before reaching a jerky stop and being raised back up for another drop."
It is…
pontiff | June 12, 2009The "International Workshop on Dynamical Decoupling (IWODD)" now has a web site with information on the conference Oct 5-6 in Boulder, CO:
Dynamical decoupling techniques show the potential to dramatically suppress errors in quantum information and quantum control systems. To date, research in this area has been scattered between magnetic resonance experimentalists and quantum information theorists. This workshop aims to foster new relationships between experimental and theoretical researchers in an effort to speed technical developments and to promote the adoption of dynamical decoupling…
drorzel | June 12, 2009Tom Levenson has another post up in his ongoing series about the writing and publishing process of his new book, this one about generating publicity. At this point, he's gone past what I've experienced so far, but this is fortuitously timed, as I got a note from my editor yesterday saying that the bound galleys are in. Woo-hoo!
There will be pictures and so on when I get my copies (probably next week). This seems kind of early-- the book itself won't be out for another six months-- but I assume that the folks at Scribner know what they're doing. Anyway, I eagerly await Tom's next installment…
drorzel | June 12, 2009Dave Ng has recently upgraded the Order of the Science Scouts of Exemplary Repute and Above Average Physique site, which provides a variety of achievement badges for members to claim and post. I'm not a big one for extra graphics on the blog (they delay the loading of the cute baby pictures), but if you're into goofy stuff, they've got some fun options.
For the record, the badges I can claim include:
I Blog About Science (duh)
Has Frozen Stuff Just to See What Happens (Level III) (liquid nitrogen is cool)
Worship Me, I've Published in Nature or Science
Experienced with Electrical Shock (…
jstemwedel | June 11, 2009Over at Cosmic Variance, Julianne Dalcanton describes a strategy for scientific communication that raises some interesting ethical issues:
Suppose you (and perhaps a competing team) had an incredibly exciting discovery that you wrote up and submitted to Nature.
Now suppose that you (and the competing team) simultaneously posted your (competing) papers to the ArXiv preprint server (which essentially all astronomers and physicists visit daily). But, suppose you then wrote in the comments "Submitted to Nature. Under press embargo".
In other words, you wrote the equivalent of "Well, we've…
esiegel | June 10, 2009This week at work, we're interviewing candidates for the job that I'm leaving. And one of the questions that came up was so simple and so fundamental to all that we do here that I thought I would ask it to you:
With all the problems in the world -- economic, political, social, and military -- what's the point of spending money on basic science? For example, why spend money looking for gravitational waves, the Higgs boson, or life on Mars?
Yes, these things are expensive. The total cost of LISA -- the space antenna that will look for gravitational waves -- is around 5 billion dollars; the cost…
pontiff | June 10, 2009The astro/physics blogosphere is all atwitter about papers the Nature embargo policy (See Julianne If a paper is submitted to nature does it still make a sound, the cat herder Hear a paper, see a paper, speak no paper, and he of less than certain principles Unhealthy obsessions of academia. He of uncertain principles loses the catchy title contest :) )
In this discussion, the uncertain principal brings up an interesting effect for arXiv postings:
There's an obsession in science with the order of publication that I don't think is really healthy, and I think it's only gotten worse. At the…
drorzel | June 10, 2009OK, it's not really a full post-mortem, because I haven't graded the final exams yet, but I wouldn't tell you about those, anyway. Still, I wanted to take a moment to reflect on the past term, which was my first teaching introductory mechanics on the Matter & Interactions curriculum.
On the whole, I continue to like the approach. I like the way that the book focuses on the major physical principles-- the Momentum Principle, the Energy Principle, the Angular Momentum Principle-- because those are the real take-away message from introductory physics. I also thing it's good that the class…
drorzel | June 10, 2009Over at Cosmic Variance, Julianne is annoyed at Nature's embargo policy. It seems that somebody or another posted a paper to the arxiv while submitting it to Nature, and included a note on the arxiv submission asking people to abide by Nature's embargo.
So, instead of blogging about the Incredibly Exciting Discovery (which I'd loooove to talk about), I'm writing about what a ridiculous fiction the authors are asking us all to participate in, for the sake of the authors' potentially getting a publication accepted to Nature. The authors advertised a paper to thousands of interesting, engaged…
rallain | June 9, 2009So, analysis of the movie Up is pretty popular in the blogosphere. Figure I might as well surf the popularity wave. So, I have a couple more questions.
The most important thing to estimate is the mass of the house. I am going to completely ignore the buoyancy of the house. I figure this will be insignificant next to the buoyancy needed. Anyway, let me go ahead and recap what has already been done on this in the blogosphere.
Wired Science - How Pixar's Up House Could Really Fly - from that post:
First, they calculated (seemingly correct) that the buoyancy of helium is 0.067 pounds per…
esiegel | June 9, 2009One of the toughest things to do in science is to figure out -- of all the things that exist in the world -- is which ones are relevant to your problem. Take the Leaning Tower of Pisa, for instance.
Specifically, I wrote about Galileo's famous problem, where you take two cannonballs, one that's 10 lbs and one that's 1 lb, and drop them simultaneously off of the Leaning Tower of Pisa, about 55 meters up.
Perhaps you'll make the simplest model, and say that the only thing that matters is gravity. Perhaps you'll neglect air resistance, friction, the Coriolis forces, wind, horizontal motions,…
grrlscientist | June 9, 2009tags: book review, Plastic Fantastic, How the Biggest Fraud in Physics Shook the Scientific World, physics, ethics, fraud, Bell Labs, Lucent Technologies, Jan Hendrik Schön, Eugenie Samuel Reich
Physicist Jan Hendrik Schön was too good to be true. After graduating from the University of Konstanz in 1997, he was hired by Bell Labs in New Jersey, where he quickly rose to scientific fame. By 2000, he had published eight papers in the world's most prestigious journals, Nature and Science. One year later at the height of his career, he was publishing one scientific paper every eight days --…
drorzel | June 9, 2009
I'm watching Pardon the Interruption after work, and they're talking about the Belmont Stakes. They show a clip of horses running, and Emmy pipes up: "I like horses!" She does this when she feels I'm not paying her enough attention.
"Horses are okay," I say.
"Okay? Horses are really neat!" She thumps her tail on the floor, to emphasize the point.
"I guess." A really bad idea comes to me. "Say, did you know that all horses have an infinite number of legs?"
"What?"
"Yeah," I say, pausing the DVR. "All horses have an infinite number of legs, and I can prove it with logic."
"How?"
"Well, we know…
drorzel | June 9, 2009Every year around this time, references to that damn sunscreen speech pop up again, as people start thinking of graduations. It's in the air (Union's graduation is this Sunday, and I don't think I've ever been happier to see the end of an academic year).
And, of course, I have actually been asked to give a graduation speech. Which leads naturally to thinking about what one piece of advice I would give to a high school student who came up to me and said "I plan to study physics in college. What one thing should I study?"
(Hey, it could happen...)
My one-word piece of advice for students…