Part of K C Cole’s teaser for tomorrow’s Categorically Not! – Inside Out said:
Sometimes the results are surprising: circles in the plane can’t be turned inside out, but spheres in 3-dimensional space can be.
This is all the license I need to show you* this wonderful 21 minute video showing exactly that (and explaining some rather beautiful mathematics along the way):
Direct link to the Google Video (for larger viewing) here. […] Click to continue reading this post
The next Categorically Not! is a Blue* one! It’s on Sunday October 28th (tomorrow). The Categorically Not! series of events that are held at the Santa Monica Art Studios, (with occasional exceptions). It’s a series – started and run by science writer K. C. Cole – of fun and informative conversations deliberately ignoring the traditional boundaries between art, science, humanities, and other subjects. I strongly encourage you to come to them if you’re in the area.
Here is the website that describes past ones, and upcoming ones. See also the links at the end of the post for some announcements and descriptions (and even video) of previous events. (Above right: The Los Angeles Philharmonic’s Paul Stein demonstrating “small differences” on the violin, in the event with that theme.)
The theme this month is Inside Out Here’s the description from K C Cole: […] Click to continue reading this post
I don’t know if you’ve been watching the new PBS series WIRED Science, but I recommend that you give it a try. There was another excellent episode Wednesday night, covering topics as diverse as organ regeneration, neutrino oscillations, and research in supersymmetry (interview of Jim Gates by Zia). You can see video of lots of the segments here.
To my delight there was another excellent new short segment, called “Hack”, again done by Chris Hardwick in the studio. Recall I spoke about the “What’s Inside” pieces a few weeks ago. “Hack” shows you how to make something familiar, as opposed to just find out what’s inside something. In this one, Chris (who’s impressively very funny while he does the chemistry: : “a funnel…’cos it’s got the word `fun’ in it”) shows you how chemoluminescence works by demonstrating how to reproduce what glow sticks do! Here’s the video:
While I’m on the subject, there’s some news over on my other blogging gig, […] Click to continue reading this post
Definitely time for a gin and tonic, a long groan of exasperation, and a lie down on the sofa.
As you can see by scanning down the page (if you’re a regular), all the blog posts and comments since October 11th right up until today have been lost. The blog was hacked a few hours ago, and it was being redirected to a site in the Middle East. I’ve no idea why.
Anyway, I’ve managed to get (withe the prompt help of the good people at Bluehost) everything restored since the last backup. It turns out that I thought i had more regular backups enabled, but it was not set properly.
I’m going to have to rebuild a number of customization elements of the blog to make it compatible with the newer (and supposedly more secure) version of the blog software I am running, and so the site might look a bit weird for a while until I complete that.
In the meantime, I need to see if I can find some way to get those old posts back and […] Click to continue reading this post
As a headline, it’s a cheap link, I know, but it was irresistible. The point is that the comet Holmes suddenly got much brighter and is now beginning to do a naked eye display. How much brighter? It went from magnitude 17 to magnitude 2.8 over the course of a few hours. David Morrison (at NASA) who writes a newsletter about near earth objects (NEO) gives an analogy: “This is equivalent to the planet Saturn suddenly becoming as bright as the full moon.”
Before you go wild, based on this, know that […] Click to continue reading this post
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The strange object pictured above is a rather nice demonstration of the “field lines†around a bar magnet. It is not a great photo (all my fault), but the demo is great. The designers suspended the tiny bits of iron in oil, inside a sealed chamber, forming a block. There’s a little cylindrical hole through the centre of the block (but still outside the chamber) that allows you to put a bar magnet in. This makes for a demo far more exciting than any shake-it-up snow scene: You shake block and the iron filings are all over the oil in three dimensions, randomly arranged. You then insert the magnet. They slowly but determinedly arrange themselves into the familiar pattern, in three dimensions. It’s great. (Why didn’t they have these when I was growing up?! I might have gone into science… Oh, wait…)
I was looking around one of our demo labs last week for things to use to demonstrate some of the principal effects of magnetism. The above demonstration was one of the […] Click to continue reading this post
[Post reconstructed after 25.10.07 hack]: My Correlations colleague Michael Tobis has a nice, simple post about the difference between weather and climate that’s worth a look. He starts out: We climate scientists often hear the case made “If you can’t predict the weather next week, how could you predict the … Click to continue reading this post
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There’s something ever so romantic (not in the hand-holding-under-the-moon sense) about deep sea exploration. It occupies the roughly same part of one’s emotional landscape as space exploration, I think, but it’s maybe even more exciting in some ways, because there’s something about the utterly weird and unknown being just under the surface of the familiar, while space seems so far away (actually, in one sense it isn’t, if you go straight up, but in terms of logistics, it seems and is far…). It also very much has the feel of a 19th Century adventure, with explorers going off and bagging the weird and wonderful specimens to bring back for museums and entertainment. This was seldom good for the specimens involved, of course, and we […] Click to continue reading this post
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Don’t forget the Orionids over the next night or two (peaking late tonight, the wee hours of Sunday morning). As the name implies, look for them coming from Orion, although even if you don’t know exactly where that is, you’ll see them almost anywhere you look in the sky if you’ve enough dark. Recall that Orion has those three bright equally spaced stars in a line, making up his belt. I spoke about this, and gave more directions about the Orionids in a post last year.
There’s a Space.com piece by Joe Rao with more discussion. About sightings, it says:
Expect to see few, if any Orionids before midnight – especially this year, with a bright waxing gibbous Moon glaring high in the western sky.
But moonset is around 1:30 a.m. local daylight time on Sunday, and that’s a good time to begin preparing for your meteor vigil. At its best several hours later, at around 5:00 a.m. when Orion is highest in the sky toward the south, Orionids typically produce around 20 to 25 meteors per hour under a clear, dark sky.
Today’s StarDate (as usual, read on NPR by the wonderful Sandy Wood) has a piece on it too. Here’s an extract from the transcript (written by Damond Benningfield):
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Flowers on my San Pedro cactus (trichocereus pachanoi). (Click for larger view.)
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There’s been a recent discovery* of an unusual black hole. It is about sixteen times the mass of our sun. While this might not seem as dramatic as the black holes that are millions of times the mass of our sun that live at the cores of galaxies, such large black holes that result from the collapse of ordinary stars have hitherto been unknown. This presents an important and exciting puzzle about the processes by which black holes form from the collapse of stars. There’s evidently more going on than previously thought, possibly as a result of complicated interactions with its companion star during formation.
(Image: A Harvard-Smithsonian Center image of the galaxy Messier 33, in which the new black hole was found.)
I talk a bit more about this on Correlations, and you can read more about the recent […] Click to continue reading this post
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I just got back from a real treat* on the USC campus this afternoon:
Know who that is on the podium? (Click for larger view.)
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Two Thursdays ago I went up to Santa Barbara to give a seminar. I had a great time, and it reminded me why it can be so much fun to go somewhere and visit for even a short time and do that. I got to catch up with several old friends, including Santa Barbara itself, where I lived for a number of years in the 90’s when I was a postdoc. I spent time chatting with the various people there before (at lunch) and after (individually) the seminar, learning about some of the research they’re doing, and also talking about other matters physics-wise and gossip-wise. I wish I’d had more time to talk since I did not get to talk to everyone I wanted to talk to, and not at as much length as I would have liked. (This was partly due to the fact that I spent the morning in my hotel room writing some of the slides for my talk. – I had a presentation the day before to focus on, along with a departmental visitor to host, and the day before I was also occupied. Don’t ask about any earlier than that – I never prepare new material that much in advance. Not because I don’t want to, but it just never happens… if I have more than a day or two, I will find that there’s other stuff I have to do.)
Anyway, a good time was had by all (I think). I can even post a picture of some of us at dinner in the evening after the talk. (Will update later with that, since it was downloaded to computer that’s not here.) We went to an old haunt of mine in downtown Santa Barbara – Roy’s. I’m pleased and surprised that it is still there and going strong, since it is the sort of highly individual restaurant that – since it is also reasonably priced – you’d expect to vanish from such a high value spot in town.
What was I talking about? Well, with three students (Tameem Albash, Veselin Filev, and Arnab Kundu), I’ve been involved in some fun work on some of the physics concerning […] Click to continue reading this post
[Post reconstructed after 25.10.07 hack]: My first reaction was one of dismay mixed with amusement: (Taken from the Griffith Park Observatory. Click for larger view.) Surely the solution to the brown 800-plus acre scar in the landscape that was once a lot of greenery in Griffith Park visible from all … Click to continue reading this post
[Post reconstruction in progress after 25.10.07 hack (comments and images to follow)]: From the Nobel Prize site, the final one of the year: The Royal Swedish Academy of Sciences has decided to award The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 2007 jointly to Leonid Hurwicz … Click to continue reading this post
