Author Archives: Clifford

Tzintzuntzan

By | | , , ,
2 Comments

yacata_1(Top prize for the best name on last month’s trip.) This is the name of an existing town as well as the nearby archeological site, the subject of this post. On the Sunday I referred to in a previous post, several of the School went off on a bus to do some sightseeing West of Morelia. This is one of the places to which we went. I learned a bit about the pre-Columbian mesoamerican civilization, the P’urhépecha (or Purépecha), whose capital was Tzintzuntzan (place of the hummingbirds). The structures in my photos (click for larger view) are called Yácatas, which are on a plateau overlooking the lake Pátzcuaro. […] Click to continue reading this post →

Morelia Cathedral

By | | , ,
3 Comments

Morelia is a beautiful city. One of the things that strikes you is the high concentration of architectural features that are either churches or related to churches (convents, chapels, etc) in the core of the city. The queen of these is the cathedral, which was across the street from my hotel (and gave it its name). Here it is during the day. The photograph was taken quite early in the morning to take advantage of the pleasant light (click for larger view):

morelia_cathedral_day

It has fountains and gardens on both sides of it, and so acts as an all important […] Click to continue reading this post →

Street Invasion!

By | | , , ,
4 Comments

cyclovia_morelia_3On Sunday in Morelia, Mexico, I was walking along the main street near my hotel and it seemed that something unusual was going on. The street was empty of cars, and some sort of event was going on. I saw a few cyclists here and there in the distance, but not the sort that look all hardcore and determined to go fast and determinedly on their way, but instead the more leisurely stop-and-smell-the-flowers sort. I wondered almost immediately if I had run into a local ciclovía, and a few minutes later, a sign confirmed this. Wonderful!

I’ve been waiting for such a thing to come to LA for a while now, since I heard of it last year when I part (and presented) in a public discussion downtown at the Artwalk about bike issues in the city, and had heard that it was becoming more widespread (it started in South America – Colombia) but it was an unexpected treat to find one right outside my hotel room! Here are three more picture. Click for larger view.

cyclovia_morelia_1 cyclovia_morelia_2 cyclovia_morelia_4

It was great to see lots of people out and about just using the streets with no cars […] Click to continue reading this post →

Produce

By | | , ,
5 Comments

tomato_crop Well, here’s the first batch of the season (not counting the onesies and twosies I’ve nibbled over the last few weeks as I go by), representing four different varieties… By the way, my compost played a role in all this, so it is quite satisfying.

If the War goes well, I ought to get more of these soon. Several plants are producing tomatoes.

News from the Front? Fluffy has started the above ground […] Click to continue reading this post →

Scenes from School

By | | , , , ,
8 Comments

unam_astro_math_mexico_2Well, my work at the Quantum Gravity school over (see previous posts here, here and here), I hopped on a plane yesterday, in order to return to Los Angeles. It was an excellent time. I enjoyed being in Mexico again, and seeing a new part of it (see posts to come), and the school was well organized and very enjoyable. The students were very receptive overall, and I spent a huge amount of time chatting with them about physics between sessions, over lunch, and on the bus back and forth between the campus and the city (and on the excursion on Sunday for a while). A number of students seemed very interested in some of the quantum gravity phenomena that are possible to describe using string theory – surprised in most cases (since the background independence issue that keeps being waved about by some as a naive (in my view) and bluntly used principle seems to have served as a block to many) – and it was a pleasure to be able to open them up to new physical ideas. It worked pretty well because I gave them three lectures on the basics of string theory, and so could build on that material in the one to one discussions to explain more detail.

lunch_waiting_unam_mexicoDynamical changes of spacetime dimension is one thing that captured a lot of interest, as well as string theory’s various ways of showing in model examples how spacetime is an emergent, classical approximation to an underlying quantum description that does not have manifest spacetime geometry. The latter is something that all approaches to quantum gravity hope to realize in one way or another (since those sorts of ideas and fantasies about what quantum gravity should be appeared in the mid 20th Century), and exactly how it emerges in string theory is a beautiful story. Who knows, perhaps they will take these hints from string theory about how quantum gravity can work and develop them […] Click to continue reading this post →

Victory!(?)

By | | , ,
10 Comments

In other news…

It’s a long story. You should refer to last year’s start of The Troubles, starting with the Great Tomato Atrocity. This year it began with the lovely tomato on the right…tomato_gift (click for a larger view).

At first I thought it was an early attack by Fluffy (in the 3.x series, presumably – I did battle with series 1 and 2 last Summer – especially since I’d deployed the first level of countermeasures already this season, the shields around the main tomato area of the garden. Had Fluffy found a way past those? Would I have to fortify them? I was very annoyed since I wanted to make a gift of that tomato and had been admiring it every day since it began to ripen, waiting for the moment to pick it. Evidently mine were not the only admiring eyes. And my paws were not the first to get to it. So I decided to launch more level one of the offensive countermeasures, to test the possibility that something other than Fluffy was a work here. Perhaps one of Fluffy’s allies. The Fluffy series with less good PR: Slinky. I might need to be fighting a war on two fronts. […] Click to continue reading this post →

Minority Report

By | | , , , , ,
55 Comments

This is a quick update on the school. I’ve been trying to give the students some of the core concepts they need to help them understand what string theory is, how it works, and what you can do with it. Here’s the really odd thing about all this (and an explanation of the post title): While this is a school on Quantum Gravity, after talking with the students for a while one learns that in most cases the little they’ve heard about string theory is often essentially over 20 years out of date and almost always totally skewed to the negative, to the extent that many of them are under the impression that string theory has nothing to do with quantum gravity at all! It is totally bizarre, and I suspect it is largely a result of things that are said and passed around within their research community.. So there […] Click to continue reading this post →

Arrival

By | | , , , ,
10 Comments

(Anyone remember Mike Oldfield? I recall a lovely piece of music of his with the same title as this post and it has now been playing distantly in my head as I type…very pleasant.)

Well, I’m sitting at an outside table across from the main square with the cathedral and having a simple lunch. It is hot, and so I have a glass of cold pale beer in front of me, and everyone around me is speaking Spanish. This feels like it could be that I am back in Madrid, but in fact I am in Morelia, Mexico. (I can tell because, among other things, I’ve never been offered a shoe shine quite so many times in the space of 15 minutes…) It is quite a lovely place, as far as I’ve seen so far (I’ve not explored much yet). I’m resting after a very early morning travel schedule which saw a slight panic (er…long story) at LAX to catch my flight which left just before 1:00am. The seats were fixed to the bolt upright position the whole flight and so the two and a half hours I’d planned to snooze were not so […] Click to continue reading this post →

Summer School Prep

By | | , , ,
2 Comments

So, it is that time of year.

I’ve got to give three introductory lectures on string theory in a Summer school somewhere in Mexico next week. So I must break away from intense work on The Project (which is going well, so maybe you will hear about it sometime soonish(ish)….) and focus on how to cram all the cream into three comprehensible and useful lectures. I hate overdoing the “it can be shown” line that ends up making the whole thing seem like magic (as is so often done), so this is always a challenge. Here’s how my preparation usually goes (and indeed it went this way this week): […] Click to continue reading this post →

A Treasure Trove!

By | | , , , , ,
5 Comments

As I’ve mentioned before, I listen online to Radio 4, one of the BBC radio stations I love for its variety, breadth and depth of programming. Between it and NPR affiliate KPCC, my day is usually rather full of (spoken-word) radio of a wide variety. I’ve noticed that Radio 4 has been doing a programme called “A History of the World in 100 Objects”. The Director of the British Museum does a 15 minute programme on each of 100 objects and talks about aspects of its historical significance. (If you think you don’t like history (maybe bad experiences in school or something like that) this might be a great way back into the subject for you. Not liking a subject is usually, I find, an issue with how it was presented to you and not with the subject itself.) It’s a lovely way of quickly plugging into aspects of world culture in interesting ways, and rather reminds me of the short series that we here at USC in the College Commons called The Cultural Life of Objects, organized by my colleagues Anne Porter and Ann Marie Yasin. (See also the Collections event, and my post about it.)

The BBC series is about half way now, and it has been quite wonderful. I strongly recommend it to you. Here’s the marvellous thing: The entire series can be podcast […] Click to continue reading this post →

Laserfest Videos

By | | , , , , , ,
Comments Off on Laserfest Videos

laser_beamI think I mentioned a while back that as a celebration of the 50th anniversary of the Laser, there was a video competition on Physics Central to make a fun video about the Laser. They were put on YouTube (tag is laserfest, I think) and then there was voting at some point (I imagine), and winners were chosen. You can see them here. Congratulations to the winners!

Actually, I think the whole playlist of Laserfest video entries is here, and you can jump through them by clicking the link to the next one in the top right hand area.

Are you aware of Laserfest, by the way? Go and check out the website and join in the celebrations of the Laser!

I should mention that the competition has all meant good news for my work as well. I […] Click to continue reading this post →

Planck Matters

By | | , , , , , , ,
2 Comments

You can read a bit about the work of my colleague Elena Pierpaoli and her postdocs and students in this article in one of USC’s in-house publications. It focuses on the Planck observatory (image right from NASA/ESA), which we’ve discussed here before. (Recall the launch?) There’s a lot of exciting physics about the very young universe to be discovered as more data from the mission get gathered and analyzed.

Enjoy the article!

-cvj Click to continue reading this post →

He Had Problems…

By | | ,
4 Comments

vaderYeah, there was something wrong with that Darth Vader guy, don’t you think?

An official diagnosis was reported in the journal Psychiatry Research. Seems the poor fellow was afflicted with a personality disorder. This is the claim, anyway. There’s a post about it here that’s worth looking at*. The most entertaining bit (for me) is probably the comment stream from the rabid fanboysandgirls (as you might imagine for something about Star Wars).

For me, the best insights into the fellow are to be found in his blog which I remember from a few years back. Still quite brilliant. (Be sure to scroll to the bottom and read the posts in reverse order to get them in the right order.)

Back to the diagnosis post. One of my favourite comments, after all the people […] Click to continue reading this post →

Understanding Artificial Life

By | | ,
Comments Off on Understanding Artificial Life

You’ll remember the recent announcement about the first synthetic life form, created by team Venter. But what does that mean, really? How truly synthetic is it really? What aspects of Nature needed to be input in order for it to be viable? Too much for it to be called truly synthetic? What dreams are out there to do better? What’s the science behind such a challenge? How did the mechanisms for life that we know know actually evolve, and what steps are adjustable or reproducible?

These questions and many more are addressed in a lovely special edition of BBC […] Click to continue reading this post →

Search Results

By | | ,
12 Comments

Googling people is often interesting. One thing I’ve noticed is that in the search results it seems people are showing up a lot more on various kinds of databases, business networking groups, social networking groups (of course) and so forth. Is this a growing phenomenon? Are people joining more of theses, or are various network entries automatically generated? (I ask this as someone who walked away from facebook, for example. Perhaps I’ll talk more about why some other time…)

In this vein, I forgot to mention that a little while ago I discovered that I have a Wikipedia entry. I am not sure how I feel about this, but it is (I suppose) flattering that someone took the time to add this to the things out there on the web about me. (I don’t think it was automatically generated.) I’d previously assumed that if an ordinary person had a Wikipedia entry it must mean that they wrote it themselves. After all, who would be interested enough to write one about someone else? Seems […] Click to continue reading this post →