Category Archives: science

Voice of God

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With the Aspen Center for Physics film almost completed (see several earlier posts, e.g. here, here, and here), various things get set in stone once and for all, so that other things can be built on top of them. At some point, I had to be certain of the final form of the voice over, so that Dave (the editor) can lay it in and time various transitions around it. This was done on Friday along with a huge rewrite of the whole film script, and lots of work on picking b-roll footage and other material to illustrate the film and create atmosphere. Once my co-producer/director Bob had glanced at it and made some helpful remarks (always good to have more eyeballs to spot any mistakes that could get frozen in) I was ready for Monday’s exercise – recording the final voice work. No turning back, no second chances, since we need to deliver the film this week.

While I’ve directed a bit before, I’ve not ever had the chance to direct a hugely experienced star actor, so this was going to be a blast! A while back, over food and drink at a party, my friend Harry Lennix (who loves contemporary physics – that’s in fact why we met, years ago) had generously agreed to do the voice narration for this project, and I was very pleased since it was his voice I had in mind since late August […] Click to continue reading this post →

Peek Over My Shoulder

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Been splitting my time between being a physicist and being a filmmaker making a film about physicists. It has been an interesting time. Recall from earlier posts (see e.g. here and here) that I am working on getting a film made for the Aspen Center for physics in celebration of its 50th Anniversary. I’ve got rather sucked into the process – a lot more than I intended – and so find myself putting together the script that will guide the editor in cutting the film. This means that I’m reviewing acres of footage of interviews and picking out some great quotes from my awesome cast of interviewees. You might recognize some of them (feel free to try to name them, and their field…).

What you’re seeing in the picture is a screenshot of some of the windows I have open […] Click to continue reading this post →

Don’t Forget the Transit of Venus!

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Hot on the heels of the annular eclipse of a few weeks ago, we’ve another giant body passing in front of the sun tomorrow. Venus! This time the giant body (roughly the same size as the earth…just a bit smaller) is much further away from us, and so is dwarfed by the sun. It’ll be a tiny dot on the disc of the sun that takes several hours to pass across. This’ll give you plenty of time to look. (In the US, for example, it’ll start at about 6:06pm EST and about 3:06pm PST…) You won’t get another chance (at least, not from earth…) until 2117, so have a go!

In fact, you’ll be doing something that is vital for modern astronomy right now – observing the effects of a planet on the light of its parent star as seen from afar. This is the principal method for detecting planets moving around distant stars, the “extra-solar” planets you hear so much about in the news from time to time. Here, we’re seeing it happening for a familiar planet around a familiar star. Although both objects are quite familiar, this transit is still worthwhile to study, since it helps planet hunters learn more about how such processes can help deduce things about the planet doing the transit. So study it many will, I’m sure.

You can just look at it for fun, but remember to be careful. Do not look directly at […] Click to continue reading this post →

Containment Cube

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No, not some geometrical artifact of immense power… It is the containment for my next batch of compost. Click for a larger view. I made it last year out of PVC pipes and chicken wire, and it was a huge success (see recent posts with pictures of the produce that has been appearing from that compost batch….) with one design flaw: It was a bit high so that digging in it to turn the forming compost over and so forth was tough on the back – I put my back out for days one time. So I’ve cut it down to a smaller height and now it […] Click to continue reading this post →

Film in Progress…

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This was an incredibly busy visit, but worthwhile. We pulled 12+ hour days in getting everything needed for the film (about the Aspen Center for Physics), with lots of backup, and oodles of great footage. So much that I fear we have so much great material we can make five completely different short films instead of the one that is supposed to be delivered. It is going to be tough. I’m so excited about some of the things that we’ve shot. A number of ideas I had for the arc of the film, the feel and tone, and the opening moments, look to be falling together almost _exactly_ as I envisioned them months ago.

Ouf excellent DP, Dave Gaw, (an accomplished filmmaker in his own right) seems to almost immediately get what I’m trying to do when I explain something I’ve visualized, or when I draw it, and so the shots work out quite nicely, and sometimes he’s gone and filmed some sequences that look very much like ones I’d been imagining, sometimes without us even having had a discussion about it! It has been a great collaboration among the three of us – Dave, Bob Melisso (my co-Producer/Director), and myself – as we exchange ideas about how to best implement something or other to make it tell part of the story…

Anyway, while preparing for getting some nice outdoor shots of physicists doing […] Click to continue reading this post →

The Shooting Party

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20120529-112915.jpgI’m at the Aspen Center for Physics for some time this week. It is a big week. You will perhaps recall that I’m involved in making a short film for the 50th Anniversary celebrations of the ACP (see some earlier posts) and now we are doing another batch of shooting. Not just interviews, as we have been doing so far, but much of the other footage we need, such as the lovely grounds, the various physicists using the center, in myriad ways, and so forth. We’ve had a super long day today, which[…] Click to continue reading this post →

Solar Eclipse!

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Don’t forget the annular solar eclipse on Sunday! You get get all the detail about it at the NASA eclipse site here. According to the site:

“An annular eclipse will be visible from a 240 to 300 kilometre-wide track that traverses eastern Asia, the northern Pacific Ocean and the western United States. A partial eclipse is seen within the much broader path of the Moon’s penumbral shadow, that includes much of Asia, the Pacific and the western 2/3 of North America”…

I’ve put a snap of the graphic they provided on the right for decoration, so you can go to the site for more detail and explanation. This includes precise times for your city, and so on and so forth. Be sure to exercise the usual precautions in viewing (do not look directly at the sun with your eyes, and certainly don’t look at it through any optical instruments… project the eclipse onto something else… there are many sources that can tell you more about that…)

Enjoy!

-cvj
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Bringing Science to Schools

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Here’s a nice article (by Ambrosia Brody) about some of the work the Joint Educational Project (JEP), Women in Science and Engineering (WiSE) and the Dornsife College of Letters, Arts, and Sciences (all here at USC) have been doing to get school students excited about science. It looks like a fun and valuable program, and it is always great to see the look of wonder on the faces of the students as they explore (see film below). (Photo is by Nick Pittarides for USC News.)

A nice aspect of it that caught my eye is that one of the films that got made for the […] Click to continue reading this post →

Heaven’s Parameters

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Oh… I forgot to get around to letting you know the result of designing the universe required in a previous post. The result is that it is a radiation (“light”) filled universe with positive cosmological constant [tex]\Lambda[/tex](and so space wants to expand due to negative pressure – much like ours seems to be doing). The radiation density wants the thing to collapse. There’s a balance between the two, and it turns out that it is when the two densities (radiation, and vacuum energy) are equal. This is only possible when there is positive curvature for the universe (so, not like ours), as you can see from the Friedman equation if you were that way inclined. So the universe is a 3-sphere, and if you work it out, the radius of this 3-sphere turns out to be [tex]a=\left(\frac{3}{2\Lambda}\right)^{1/2}[/tex]. The temperature of the radiation is then computed using the usual Stefan-Boltzmann relation.

The equality of densities turns out to result from the fact that the effective potential of the equation is at a maximum, and so this universe turns out to be unstable… It is a radiation-filled version of Einstein’s matter-filled static universe, which is also unstable. It is larger than Einstein’s by a factor of [tex]\sqrt{3/2}[/tex].

Einstein was said to have arrived at his static universe on the grounds of what he thought was observationally clear – the universe was unchanging (on large scales). […]
The equality of densities turns out to result from the fact that the effective potential of the equation is at a maximum, and so this universe turns out to be unstable… It is a radiation-filled version of Einstein’s matter-filled static universe, which is also unstable. It is larger than Einstein’s by a factor of [tex]\sqrt{3/2}[/tex].

Einstein was said to have arrived at his static universe on the grounds of what he thought was observationally clear – the universe was unchanging (on large scales). Hubble […] Click to continue reading this post →

Project Heaven

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This is an extra homework that some students of the General Relativity class did to make up for one that did not count earlier in the semester. While writing it, I realized that this universe is in fact, Heaven! You know, we become beings of light, and live forever, etc…

I thought it would be fun to share its final form:

“You work in the design section of the company that manufactures universes. (This is […] Click to continue reading this post →

Fractal in Progress…

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So last week we had a visit from Kelly Stelle (he’s part of the high energy theory group at Imperial College) who gave us an excellent talk about aspects of supergravity. His work connects to the fascinating ongoing story about finiteness, and the new techniques being used to do the multiloop computations (see a recent Scientific American cover story about some of that – it is misleadingly packaged by the magazine, as usual (preview here) , but the article itself, focusing on the computational issues, is nice).

After his talk, I gave him a tour of the campus, and as we passed through the Doheny Library to view the lovely interior, we stopped by the ongoing construction of the Mosely Snowflake Sponge fractal that I told you about here.

They’re making a lot of progress.

We spent a few minutes folding some business cards to contribute some component cubes to the construction, and I took a snap (see photo on left) of Kelly at work. We made two or three cubes each…

Here’s a shot of one of the completed modules […] Click to continue reading this post →