Author Archives: Clifford

No. Uh-uh. Nope. Nuh-Uh.

By | | , ,
23 Comments

I’ve received any number of emails from excited friends pointing me to articles in the news saying that particles have been discovered moving faster than the speed of light. Thanks everyone! My initial gut-response to the whole thing has been as given in the title of this post. My measured, scientist-response has been “this is extremely unlikely”. You see, it doesn’t seem to make much sense to me at all, and I expect that the scientists involved will at some point find an error, or other scientists will fail to reproduce the experiment. But, let’s see what happens. The great thing about science is that it is not about what people believe. It is about demonstrating phenomena with reliable, repeatable experiments. (The experiments were done by the OPERA collaboration, and their preliminary paper is here. I don’t need to point to the news articles since every news outlet has a bit on it.)

It’s funny, I’ve recently been writing about this in a part of the graphic novel. Somehow I think that the speed of light is presented too much as a speed limit in popular discourse, and so people naturally keep thinking that there’s some way of violating the law, like you can on the highway, or that some things are not subject to that law, like motorcycle cops, or people in a hurry to get home to watch Madmen, etc… I don’t expect this to be terribly clear in the short time I have to type this between this and that, but I think things are better thought of not in terms of a speed limit, but rather in terms of the fact that it all has to do with the meaning of what space and […] Click to continue reading this post →

Categorically Not! – Food

By | | , , , ,
Comments Off on Categorically Not! – Food

The new season of Categorically Not! gatherings started last Sunday night. It went very well. You may recall that it is held at the Santa Monica Art Studios. 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. Here is the website that describes past ones, and upcoming ones.

This one was about food, and had musings on food and bringing people together at New York’s Cornelia Street Cafe, by the founder Robin Hirsch. He talked about the history of the place, read some extract from his writings about it, and also described the beginnings of the “Entertaining Science” series that got going when K C Cole, Roald Hoffman, and Oliver Sacks did a performance there many years ago. The Categorically Not! series, now five years or so in age, was a spiritual outgrowth of that series, and so it was great to see Robin speak at it. He was very pleasant and interesting to talk to before and after the event too. (I did a quick, rough, sketch during his 20 minute segment – with some tidying up later – and have included it for you to see. Click for slightly larger view.)

Robin was followed by Amy Rowat, of UCLA. Amy gave us a nice overview of what’s going on in her lab. She’s a physicist, and spends a lot of her time looking at food through that lens. The concerns she described were largely ones of structural, […] Click to continue reading this post →

Journeying

By | | , , , ,
5 Comments

It is 8:20am, and only now is the sun appearing from behind the mist that seemed to cover the world since I got up this morning at 6:00am and since I boarded the Amtrak train at 7:30am, bound for Santa Barbara. We’ve arrived at beautiful downtown Northridge, and have another two hours and a half to go. I’ve got my bike folded neatly in the luggage rack above me (I tried not to look too smug when passing two cyclists struggling a bit to find room for their giant bikes in the space remaining to them), have had my second slice of multigrain bread smeared with whipped cream cheese and homemade fig jam (I made a batch a few weeks ago) and an sipping coffee while catching up on various things, such as telling you what I am doing. I think I’ll stop writing for the blog now, getting back to thinking about some physics I want to put into a new paper, looking out the window at the landscape as it opens up more (we’ll be running through farmland, and then along the seaside soon!), and letting my mind drift and be open to those expansive kinds of thoughts that typically come in when I am sitting on a train watching the world go by. I don’t get that with driving up here, since so much it put into driving safely and so forth, one’s mind is never fully free. I love train travel, and I love this journey, even though I know there’s no good reason why in the 21st Century in the USA it should take three hours. (Three and a half on the return – I mean, really).

Ok… back to stuff.

Oh, wait – Why am I going to Santa Barbara, you ask? Is it another “jump on the train and see where I end up” sort of day? (See an earlier post.) No, I’m going up there (actually my stop is Goleta) to spend a bit of the week at[…] Click to continue reading this post →

That Was the Week that Was

By | | , , , , , ,
1 Comment

I might be losing my stamina, or have simply taken on more than I usually do, but it sure seems more tiring and hectic than it usually does this early in the semester.

It was a busy week, but I managed to get a few things done here and there that seem worthwhile, so I count my blessings, as they say. (Or used to say – maybe that’s somehow too loaded a phrase to use now? Not sure.)

To attempt to wind down yesterday after a tightly wound day and found myself walking with large sketchbook in hand in the warm evening sunlight to a studio to […] Click to continue reading this post →

Swings and Roundabouts

By | | , , , ,
Comments Off on Swings and Roundabouts

Odd.

On Monday evening, I could not draw a thing correctly. Seriously, if you had put a cylinder in front of me square on, I’d have not been able to draw a recognizable representation of it.

This morning, on the bus, I noticed this interesting face inviting me to draw it (the gentleman currently in possession of it was dozing for some of the trip), and in a short time this sketch (click to enlarge) popped out from under my pencil. Funny old world…

-cvj Click to continue reading this post →

Spin

By | | , ,
12 Comments

This week marks a landmark in the class (Introduction to Quantum Field Theory) since it focuses on the seminal work of one my heroes, Paul Dirac, who quietly went about his business of puzzling over the issue of how to find an equation that describes the properties of electrons (particles of spin one-half), and in finding what is now called the Dirac equation (see snapshot from my notes on right), uncovered a hugely rich and bright cornerstone of fundamental physics. It is famously described as a sort of square root of the relativistic wave equation known at the time – the Klein-Gordon equation – and in that way of thinking you quickly arrive at the idea of anti-particles (as did Dirac), since taking a square root leads to two solutions (both +2 and -2 square to give you 4). One solution turned out to be the electron, and the other leads (by an appropriate path of reasoning) to its anti-particle, the positron*.

Besides leading inevitably to anti-particles, the equation (which Dirac pursued in […] Click to continue reading this post →

Heat and Summer’s End

By | | ,
2 Comments

It is super-hot again here in Los Angeles. My strategy has been to get up really early and get to my desk on campus well before the heat gets going. This means that I’m not walking or waiting for the bus in too much heat on the way to work. The drawback of this strategy is that if I want to avoid that same sort of heat, I’d have to stay until the evening, which makes for a series of very long days. Not so good. So I’ve been sometimes walking home from the bus or subway very slowly, picking nice clumps of trees for shade, and stopping at this nice liquor store on the corner and emerging with a nice cold (nostalgic) cream soda, which is in a brown bottle that must look suspiciously like a beer. But I don’t care. It is hot.

(Photo: Someone was flying a kite that was a long sequence of kites on the beach in Santa Monica a week or two ago. Very pretty. Being on the beach seems like an excellent idea right now.)

With the official end of Summer sort of here, there are all of a sudden far too many events and social things going on, so my evenings have all been rather more consistently full of late than I normally care for, but each time it is something so very […] Click to continue reading this post →

Laying Down the Lines

By | | , ,
5 Comments

Yesterday was very busy for me, and a tiring day overall. It started with me getting up at 5:45am again, which was not so great this time since I went to sleep at 1:00am. The plan was to get to campus at 8:00am and continue writing my 10:00am lecture. This almost worked (I got delayed by half an hour due to sending more emails and so forth about the film competition) and I was at my desk at 8:30am, so only half an hour late. I’d been building most of the elements I needed for the class the night before, and in my head on the way, and so I had plenty of time.

Plenty of time for preparing fun since the lecture was the highlight of the day! I know it sounds odd, but I had a blast in that lecture! It was, as the cool kids say, Awesome! Now don’t get me wrong… I am not patting myself on the back about my lecturing skills… it is the material that was the star here, and if you put it together the right way, it simply shines. It did so yesterday. I’m teaching the introduction to quantum field theory, among the most powerful computational tools ever devised to study Nature. (The famous example brought up is this: What else allows you to compute a number to twelve significant figures, and check it against experiment to about the same accuracy? As Feynman said in his little book “QED”, it is like specifying the distance from New York to Los Angeles to the accuracy of the thickness of a human hair… (The number represents a property of an electron, and the computation is done in Quantum Electrodynamics, a form of quantum field theory.))

We’re starting to do self-interactions now, which require the development of […] Click to continue reading this post →

Reaching Out

By | | , , , , ,
1 Comment

So I’ve been spending a huge amount of time trying to generate awareness among the students and faculty about the newly launched film competition. I don’t know how much traction I’m getting, but we shall see. Lots of poster posting, and giving packets of postcards to colleagues in College departments such as Physics, Chemistry, and the Writing Program, and over in Annenberg School for Communications and Journalism, and of course the Cinematic Arts School. I need to figure out a way of getting a foothold over in the various areas of the Keck School of Medicine, on the other campus… It’s open to all students at USC, but I need to make sure I target certain concentrations to maximize chances of getting interested students’ attention.

On Monday I did an interview with a student reporter for the Daily Trojan and that appeared this morning. (Have a read.) I’m a bit embarrassed that they missed out mentioning my colleague and collaborator Anna Krylov, but the main thing is that more people will learn about the initiative though the article. It was fun talking to Jasmine, the reporter. The key thing, for me, is that the collaborative aspect of all of this is forefront, since that’s the most important aspect. As I said in an email to another reporter this morning (which may or may not result in an article, we shall see): […] Click to continue reading this post →

From C to Zee

By | | , ,
8 Comments

End of the first week of semester. I’m already tired, I must confess. I think it is mostly a combination of running around doing various things for various projects including another big shoot this week for the science documentary series, and prepping all the publicity for the science film competition, which is now rolling along and gathering momentum, and through it all… the heat. It is just so very hot, and not using air conditioning much and walking and cycling in it to boot does mean that I’m tiring out a bit more. I’ve been waking up with those low level headaches from time to time that signal that I’ve not been cool enough during my sleep, despite having several windows open for throughput. Might have to give up and cool things down a bit with the air conditioning on a thermostat setting of some sort.

So through all that, (and not counting other things like steady progress with a research project, and the drawing here and there that I’ve told you about… oh! and the garden) I’ve also been teaching a course. It is on introductory quantum field […] Click to continue reading this post →

Subtraction

By | | , , , ,
1 Comment

I made a bit of time last night to drop into a studio (where there’s a model doing various poses) and do a bit of drawing to get my hand back in. She’s a great model who understands her body and uses the light well, so one sees forms quite readily through her work. I decided to try something I’d not tried before, given the strong subject matter. (It is a known technique I’d read about before, but I’d yet to deploy it.) I took a soft pencil and darkened the paper first (rubbing with a tissue to smooth a bit) and then did my sketch on top of that. (In future I’ll use those graphite sticks I have sitting in my desk and never use.) I built the layout as I usually do, needing to use a softer pencil this time to see the lines, leading to a lot more fluidity in my strokes… Then I began to refine shapes and form in two ways…. darkening a bit here and there with a slightly softer pencil and -most importantly- lightening shade by using an eraser (sharpened pink mostly… blue kneaded more rarely).

The point here is that I do a lot of subtraction in the later parts of my sketches anyway, but in the 25 minutes of the pose, especially when I am rusty (as I am now) I […] Click to continue reading this post →

Grabbing Faces

By | | , , , , ,
2 Comments

One of the other things I love about public transport is that you get to look at a range of people, and do quick (and preferably discrete) sketches of them. sometimes you only get a few minutes before things change, and you’ve got to deal with the bumping bus or train messing with your line choices. Fun!

Today I felt in the mood, and had two pages left in my current moleskine to fill, and so I decided to go for the subway instead of the bus, in search of prey. (Er, prey=faces/bodies/gestures/poses.) I’m careful to try not to make people aware I’m staring at them, and so pick a good distances, and preferably hide the book and pen, or try to pretend to be writing a shopping list, and looking off into space…

It does not always work, and certainly is sort of hit and miss and depends upon my mood. Most results are awful, since I either don’t have time, or get jogged, or am too chicken to take a good look to get a line right. But it’s good practice for holding things in my head… Anyway, guess what? I got on the train and – hey! There was a […] Click to continue reading this post →