Update on the Giant-Killers

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navier-stokes flowGood News Everyone! I learned just now from Good Math, Bad Math there may well be a successful proof of yet another of the great Millennium problems. This one pertains to solutions of the Navier-Stokes equations which are of central importance in fluid dynamics, for example. (The figure to the left -click for larger- is from a computer simulation, by Greg Ashford, of the airflow around an aircraft wing (in cross section) and the foil that it uses to change the overall shape of the wing for maneouvering. I got it from a site linked here.)

Penelope Smith, at Lehigh University has presented a preprint with her proof, which Click to continue reading this post →

Griffith Announces Opening

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Griffith ObservatoryYesterday, I forgot to point you to the press release from the observatory itself. There, you will find more information about the opening, on November 3rd, and about how to actually get there. They are forbidding access to the parking lot, and so you either take a shuttle bus, or you walk or cycle. It is depressing to me that people are already complaining about having to walk up a small hill from the picnic sites below (people who walk up are generically referred to as “hikers”, in the press release, which would give someone the impression that you need special equipment or something just to walk up the hill. Sigh.).

Anyway, some chatter from the press release. Let’s start out with 4th District Councilmember, Tom LaBonge, a veritable Paul Dirac of understatement and wall-flower-hood:

“Griffith Observatory is one of the best public spaces in the world if not the universe…”

Oh yes. Good ol’ Tom. He makes statements like this all the time. How can you not Click to continue reading this post →

Irrational Memories

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Back when I was young enough to care to try to list such things, I had a favourite number. Really, really faourite. I lived and breathed that number for a while. Today’s session in the freshman seminar “The Art and Science of Seeing and the Seeing and Science of Art”, about which I have blogged here and here, was all about it. Rather than do chapter and verse about it (don’t get me started!), I will instead leave you with the image that I ended with…

penrose tiling

… and let you tell me and other readers – if you like – what you think the number is, what it means to you, and perhaps share whatever you like (or hate) about it.

-cvj

Observing the Observatory

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griffith observatoryWell, here’s a bit of news. For one reason or another, I have been invited to a preview, later this month, of the soon-to-be-reopened Griffith Observatory, and so will get to see it before it opens to the very general public. (Library photos, by E. C. Krupp, by the way.)

griffith observatoryI will try my best to bring you a full report on the splendiforous contents… assuming they have not all been replaced by movie memorabilia, or some other desecration. (I’ll try very hard to not play the role of the obnoxious scientist, and so won’t yell “where the hell is the science!?” at awkward moments – I hope. I’ll try not to ask awkward questions at all. In fact I will just try to say very little in the way of contrarian remarks, since I’m an invited guest and should be polite. Actually, it’s best I don’t say anything at all.)

I am an optimist, and so despite recent news, I remain excited.

[Update: The post on the visit is here.]

-cvj

Physics Nobel Prize 2006

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cmb flucts from COBE

From the press release:

The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics for 2006 jointly to

John C. Mather
NASA Goddard Space Flight Center, Greenbelt, MD, USA,

and

George F. Smoot
University of California, Berkeley, CA, USA

“for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation”.

COBE is the experiment that really blazed the trail for all the wonderful physics that was to come from WMAP, and various other experiments such as Boomerang. And Planck is about to fly as well, giving even more precise information about our universe

COBE black body spectrumI was an undergraduate when this was announced. [Update: Oops…not quite: I had just started graduate school. Thanks Chad!] It was a wonderful feeling that all of us students had, partly gleaned from the feelings of our lecturers, I suspect. The thing that struck us as most appealing (I think) was the idea that the black body radiation spectrum (click on the image on the right for larger) that we’d been learning about in the abstract, during lectures, was sort of “out there”, writ large…. as large as can be in fact, on the whole universe! It’s always good to learn that physics -or any field- is still alive, especially when you’re still on the cusp of making a career in it.

Some more imformative background information (forgive the pun) from the press release: Click to continue reading this post →

Looking for a SEA Change?

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SEA BannerI’ve previously mentioned examples of the manipulation or suppression of scientific information by organisations such as the Bush Administration. See for example a recent post on hurricanes and global warming. Various scientists have made it their business to speak out against these types of wrongs, either as individuals in the line of fire, as individuals noticing it in the news and blogging about it to as many as care to read, and as part of organisations here and abroad.

Well I’d like to point out a new organisation I heard about* called “Scientists and Engineers for America”, and I am pleased to share with you that their website says:

…a group of scientists and concerned citizens launch a new organization, Scientists and Engineers for America, dedicated to electing public officials who respect evidence and understand the importance of using scientific and engineering advice in making public policy.

The principal role of the science and technology community is to advance human understanding. But there are times when this is not enough. Scientists and engineers have a right, indeed an obligation, to enter the political debate when the nation’s leaders systematically ignore scientific evidence and analysis, put ideological interests ahead of scientific truths, suppress valid scientific evidence and harass and threaten scientists for speaking honestly about their research.

We ask every American who values scientific integrity in decision-making to join us in endorsing a basic Bill of Rights for Scientists and Engineers. Together we will elect new leadership beginning in 2006, and we will continue to work to elect reasonable leadership in federal, state and local elections for years to come.

America needs your help. Will you join us?

(Personally, I don’t see why it is necessary to be so America-centric about it, but there you have it. It’s their choice, of course.) Their Bill of Rights is linked here. Here are the points they list: Click to continue reading this post →

Green For Purple

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You’ve possibly read about my excitement about the long-awaited Expo line, connecting downtown to USC and the Science, Natural History (and other) Museums, and then connecting out to Culver City, and ultimately to Venice. I’ve blogged this here and here. They broke ground on the project two days ago. See here and here. Here’s a picture (yes, construction workers wear business suits in LA. They are very image-conscious here, and you never know when a casting director might be looking):

ground breaking on the Expo Line

I am truly amazed every day by the small percentage of people who live and work in LA who actually know about this major breakthrough – the very existence of the plans for the line, never mind its approval. It is as though I live in a different city…. Anyway, conversations are going on in the various direcly affected communities about the design of the tations, the business that will sprout up around them, the best way to include bike lanes along the projects, and the routing of the cars that will do doubt still have priority and therefore compromise the efficiency of the entire project as happened with the Gold Line. Join in these conversations if you live and/or work in the city.

expo line map

There are some significant new developments. The first is that the proposal to call the Expo line the “Aqua Line” did not succeed. Expo Line will be the name, it seems. Ok, that’s not so significant, I suppose. Meanwhile, the second branch of the Red Line, the one that stops for no good reason at Wilshire and Western, will be called the “Purple Line”. Yay. Not significant either, you say. Maybe, but the point here is that the Purple Line is actually being discussed! Not only has it been discussed, but there has been a breakthrough. That “no good reason” mentioned above was translated -back in the ’80s- into a legal blockade, making it illegal to tunnel further along that route for safely reasons. The claim was that the geological instability (that resulted in an explosion in a store) made it unsafe to pursue the goal of having a subway run down Wilshire Boulevard, and ultimately out to Santa Monica. This project would have acheived the wonderful goal of connecting Downtown to the Los Angeles County Museum of Art, the Wiltern Theatre, The Superior Court, the Hammer Museum, and the whole of UCLA. But it was held up because (essentially) the greatest power in the history of the world could not simply look across the Atlantic or the Pacific to learn the tried and tested engineering solutions to this “safety issue”.

So the Good News: The same politician who sponsored the legislation that resulted in the ban on tunneling has how worked to (successfully) get it repealed! Click to continue reading this post →

Acting Up At Griffith Observatory

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griffiths observatory roofAs mentioned before, I am really excited about the re-opening of the Griffith Park Observatory. See this earlier post. [Update: See post about my viisit here.]


[Further Update: After reading the rest of the post, be sure to read the comments (starting here) for some commentary on the planetarium show since it was launched.]


[Yet another update: The discussion has continued to another post, with more contributions from various people concerned with the shows and the observatory, past and present. Link here.]

I’d noticed (on their site) the employment notice:

The Observatory will complete its four year renovation and expansion project in the Fall of 2006, with improvements including the new 200 seat Leonard Nimoy Event Horizon theater, doubling of the exhibit space to house more than 60 new and exciting exhibits, and new sound, lighting, interior dome and digital laser projection technology in the refurbished Samuel Oschin Planetarium theater. Employment opportunities will continue to increase as we approach our reopening date.

… and the job decriptions for the Museum Guide:

Job Qualifications
12 semester units or 18 quarter units in a recognized college or university in Architecture, History, Physics, Chemistry, Biology, Astronomy, Zoology or related field. Six months experience working in the above fields may be substituted for education.

Job Description
Demonstrate and explain exhibits relating to astronomy and related sciences. Answer questions related to the observatory, astronomy and related sciences. May be asked to safeguard exhibits, and open or close
facility.

and thought it was ok (“may be substituted for education” was a bit worrying, but I think I know what they really meant), and assumed that the guides would be supplementary to more experienced staff who know more about the actual science, etc.

It seems I was wrong. A newspaper from the neighbourhood that the observatory is in, the Los Feliz Ledger, has a story (by Kimberly Gomez) entitled “Actors Get The Call Over Astronomers”. It seems that:

The traditional planetarium lecturers, who in the past led hour-long talks in the planetarium at Griffith Observatory, are upset that when the observatory re-opens this fall, they will be out of a job. According to four past lecturers, their position which traditionally required an education in astronomy, has been changed.

Continuing… Click to continue reading this post →

Hamiltonian Support

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In the continued public discussion of the treatment of Yau’s reputation by the New Yorker article (by Sylvia Nasar and David Gruber), to which I earlier referred (see here, and see the post about Yau’s response here), there has been a recent significant development. I don’t mean the press conference of last week, held by Yau’s entourage (…did anyone see that? I could not log on… there is archived video avaialble here. I still can’t view it…reports are welcome).

No, I’m talking about the public letter attributed to Richard Hamilton, the mathematician at Columbia University who is another major player in the story of proving the Poincare conjecture. He does a great job of supporting Yau, and setting the record straight about his numerous contributions to the field in general, and to the proof of the Poincare conjecture in particular. You can see the whole letter here.

It starts:

I am very disturbed by the unfair manner in which Yau Shing-Tung has been portrayed in the New Yorker article.

and there are detailed descriptions of Yau’s early recognition of the importance of Hamilton’s Ricci flow technique, ending in:

Without Yau’s guidance and support at this early stage, there would have been no Ricci Flow program for Perelman to finish.

He then goes on to describe Yau’s contributions to the field through his encouragement and support of several young researchers in the Ricci flow program, and other key work that he and Yau did in the area, in addition to other key Click to continue reading this post →

The War Continues

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hurricane katrinaThis is the Bush Administration’s war on science, I mean. There’s lots we don’t hear about, I’m sure, but there has been a new discussion ignited by an article in Nature yesterday. I found this article on Associated Press by Randolph E. Schmidt. Seems that there was a report being prepared at NOAA (National Oceanographic and Atmospheric Administration) about hurricanes:

In the new case, Nature said weather experts at the National Oceanic and Atmospheric Administration — part of the
Commerce Department — in February set up a seven-member panel to prepare a consensus report on the views of agency scientists about global warming and hurricanes.

According to Nature, a draft of the statement said that warming may be having an effect.

In May, when the report was expected to be released, panel chair Ants Leetmaa received an e-mail from a Commerce official saying the report needed to be made less technical and was not to be released, Nature reported.

The point is that (and yes, that is a picture of hurricane Katrina, above right):

A series of studies over the past year or so have shown an increase in the power of hurricanes in the Atlantic and Pacific oceans, a strengthening that many storm experts say is tied to rising sea-surface temperatures.

and this connects -it is believed- to our activities in this way:

Just two weeks ago, researchers said that most of the increase in ocean temperature that feeds more intense hurricanes is a result of human-induced global warming, a study one researcher said “closes the loop” between climate change and powerful storms like Katrina.

However, the official word from the Agency on this new apparent tinkering is as follows: Click to continue reading this post →

Good News About Pet Projects?

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catThis may well be the best news I’ll ever give on this blog – if you love cats (like I do), and if you are allergic to them (like many are). It seems that the first commercially available hypoallergenic cat is now being shipped (or whatever you do to get new pets to customers). I learned from the journal Nature that Allerca, a company based in San Diego, California, is selling the cats. They are already taking orders for deliveries next year. (They’re only $4000. Huh.)

Amusingly, these cats were discovered by accident. The company (among several others) were trying to make their fortune by trying to figure out how to modify the genes of more standard cats to suppress the production of the protein Feld1 that is responsible for the allergic reaction. While doing this, they stumbled upon a cat that already was not producing that protein, having a slightly different one in its place.

Sheldon Spector, a clinical allergy expert at the University of California, Los Angeles, recruited ten allergic volunteers, blindfolded them, and exposed them to Joshua, a regular cat named Tiki, or a furry dummy cat. Subsequent diaries of their symptoms suggest that Joshua was more allergy-friendly than Tiki.

(I have two questions here: Why did the dummy cat not get a name, and -more importantly- what self-respecting cat lover, even if blindfolded, cannot tell a furry dummy cat from a real one? They might as well have used a dog! 😉 )

In a section of the article predictably called “Cat Fight”, they also discuss the fact that there are rival researchers who have called this all into question. You see, Allerca have Click to continue reading this post →