[Note: Originally posted on CV on 4th November 2005. 25 comments on it here. Feel free to add new ones here.] ___________________________________________________________________________________ [Warning! This is an unusually technical post.] Ok, so last time, I told you a bit about the motivations for what I’ve been up to. Now I want … Click to continue reading this post
[Note: Originally posted on CV on 31st October 2005. 31 comments on it here. Feel free to add new ones here.] ___________________________________________________________________________________ Well, I suddenly have 45 extra minutes on my hands as I was supposed to be at a very interesting two hour lunch meeting which I’ve now missed. … Click to continue reading this post
[Note: Originally posted on CV on 3rd October 2005. 65 comments on it here. Feel free to add new ones here.] ___________________________________________________________________________________ Below is a snapshot of a computation I was working on earlier this Summer. Will explain later. Spoke about it at the Southern California Strings Seminar. I’m curious … Click to continue reading this post
The next three posts are repeats of posts I did on CV in 2005. They were the first three in the series entitled “News From The Front”, and their subject matter partly lay the groundwork for a post on some new results that I hope to write soon. Enjoy! -cvj
Have you been keeping track of what Phoenix has been finding on Mars? There’s been lots of digging of holes, baking, peering at things under microscopes, and so forth. And, wonderfully, it has all been guided, monitored, and watched from here on earth. From all of this, there’s now very direct evidence for ice, for example. (Dig a hole, find white flaky chunks which disappear after exposure to sunlight…) (Image left (click for larger) is from the mission (credit: JPL/Caltech/NASA) and shows the before and after. Keep your eye on the darker corner, blown up in the inset.)
There’s a story from the AFP here, and one by Alicia Chang (AP) here. There’s a photo […] Click to continue reading this post
With the rise in gas prices, I’ve been seeing more and more people on the streets, walking and cycling, and more people using the subways and the buses. While I know that it has been producing real hardship for some people, I have to admit that it has been fantastic to see this change. So many streets and street corners have come to life. It has always been clear that higher gas prices would have this positive change, and I’ve hoped for it in some ways, but I wish that it had not come about in this way. I’d rather that it was because we’d managed to break out of a political climate so selfish and naive that nobody could propose raising taxes to an extent that would simultaneously give an incentive for people to use their cars less while at the same time providing much needed revenue with which to improve public transport infrastructure. Sadly, instead we’re just having high prices with nothing to show for it but a bunch of expressions of anger, while the oil companies and producers get fatter and fatter.
When I say I’d been hoping for higher prices, I need to clarify. I’m completely aware of […] Click to continue reading this post
Ok, so which one of you is responsible for this? (Since I started writing the post, I’ve since learned the answer – see below.)
I was watching the 1999 Mars University episode of Futurama some nights back. It’s the one where Professor Farnsworth teaches (among the many excellent lines: “I can’t teach, I’m a professor…”) a course entitled “The Mathematics of Quantum Neutrino […] Click to continue reading this post
There’s a new website that allows you to tour CDF, the particle physics detector at Fermilab, in Illinois. Jenny Lee, who worked on the site, said that it is:
“a sort of `virtual tour’ that takes the viewer through each section of a particle detector, and includes photos, interviews with physicists, and more”.
The link to it is here. It looks great. Go and look, and spread the word about it!
-cvj
P.S. While we’re on the subject, did you see the videos that take you inside the ATLAS detector inside the the soon-to-be-operating LHC? I posted about them here. Have a look. Click to continue reading this post
This is a quick note to let you know about the Discovery Channel show “When We Left Earth”, which celebrates NASA missions over the last 50 years. I have not seen it, but it looks like it’s rather good. It’s on Sundays, and started last week, but you can still see all the shows. Look here for the schedule. Tonight (Saturday) there is something special on (I got an email about this from one of the people who works outreach on the show). There’s a live chat with one of the executive producers. Here’s what they say: […] Click to continue reading this post
I was contacted by a researcher at NPR the other day. They wanted me to take part in a live conversation on the program News & Notes (hosted by Farai Chideya). The topic was about kids, technology, and science. In particular the focus was described as follows:
We want to explore the ways kid handle technology. How is technology affecting them in terms of their learning capacity and social skills? The second part of that discussion is this—with all the gadgets that are available to kids, are more of them becoming interested in science in general? We especially want to look at the subject from perspective of urban education.
Yes, all topics that intersect with many of my own interests and passions (which might be why they found me through the blog!), but I did not feel qualified to really answer some of the specific questions pertaining to how things are going currently. There are people who study this full time. I’m not one of them. So I declined to contribute. However, I had a few names in mind, and passed them along, together with two more […] Click to continue reading this post
I don’t need to remind you about the Pluto reclassification episode of a while back, I’m sure. See posts here, here, and here otherwise.
(Right: Mathias Pedersen‘s “Poor Pluto” poster, used with permission. Discussed here previously.)
The International Astronomical Union (IAU) felt the need to reclassify Pluto in the light of ongoing scientific discovery – it’s just one of probably thousands of small objects out there beyond the orbit of Neptune. This area of science is very much alive- we’re learning a lot about the solar system and other planetary systems. (See my post entitled “Clues in the Blood Splatter Patterns”.) The “demotion” led to lots of angry opinion, you may recall.
Well, the IAU’s Committee on Small Body Nomenclature (I love that!) has now decided […] Click to continue reading this post
Good news everyone! GLAST has been launched successfully. GLAST stands for Gamma-ray Large Area Space Telescope, and it does exactly what it says on the packet. It is an instrument designed to look more closely at gamma rays from outer space. More here. It will help (alongside other instruments such as SWIFT) get better understanding of a wide range of gamma-ray emitting objects, that pertain to a wide range of issues, astrophysical to cosmological.
“Gamma ray bursters” are obvious super-powerful sources of gamma rays out there, largely due to macroscopic astrophysical objects (collapsed stars or stars in the process of doing so, or merging with each other – see earlier posts) doing violent things, or interacting violently with their surroundings. So are active galactic nuclei, powered by black holes. We’d like to better understand all of the processes that allow these objects to generate gamma rays.
Other sources could include particles and antiparticles annihilating each other and (by […] Click to continue reading this post
Tonight’s Categorically Not! event was rather good fun, and interesting too. There were three excellent presentations under the theme “Ambiguity”. (See here.) K. C. Cole did a great job in bringing these people together (and of course in acting as M. C. on the night).
Bart Kosko did a great job talking principally about “fuzzy” mathematics, contrasting it with more binary (if you like) systems of logic. I think that his overview was great, and he talked about all the grey areas in logic and questions of epistemology where a “fuzzy” system is needed. (The question of whether a door is […] Click to continue reading this post
The next Categorically Not! is on Sunday June 8th. 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.
The theme this month is Ambiguity. Here’s the description from K C Cole:
Nature loves ambiguity, even if human nature doesn’t. What exactly is a species? Where exactly is that subatomic particle? When did life begin? How do genes influence behavior? Why does music move us? What does that poem mean? What color is white? Is that guy flirting with me, or not? The answers are often far more indeterminate than we’d like to think. Heck, we still don’t know why the chicken crossed the road. Or what the meaning of is is.
Bart Kosko, USC Professor of Engineering, attorney and author of best-selling books Fuzzy Thinking, Noise, and Heaven in a Chip will tell us how fuzzy math
[Typed in a cafe on Tuesday at about 3:45pm. It’s just a rough collection of thoughts about various recent meetings and activities:]
Interesting day so far. One of those “my office is everywhere” days. I’m on the West side, in Santa Monica, where I’ve a number of errands to do. Also I get to work and have some meetings in between. I try very much to corral everything to one part of town so that I am not driving around too much, adding to the general junk that we all pour into the air without thinking. So I brought my bike with me to connect the dots that I intend to go between while in the area (a couple of cafes (coffee and work), the beach/boardwalk (lunch and work), a mechanic (they’re changing brakes on my car and diagnosing a Noise), one of the English shops (for tea supplies), an electronics store (to shop for memory), a grocery store, possibly a bookstore, possibly the public library (to work and ‘cos it’s just really nice)…).
While reading some notes by one of my students on a project we’re working on, and eating lunch down on the boardwalk/beach wall near the chess-players, I reached for my phone to send him a text with a question. As I did this I looked up at the passers-by and one of them was familiar! It was someone who used to be a postdoc in one of the other groups in the department, who used to share an office with the very student whose notes I was reading! Funny when that happens… We chatted for a while about things (such as career stuff concerning the interesting research life that can often found in various commercial settings), and he seemed interested in my […] Click to continue reading this post
