String Theory: Crash Course

April 21, 2007

A Tool for Living in the 21st Century:

The excellent Seed magazine offers a cribsheet [PDF] which includes a basic introduction to string theory.

Prof. Clifford Johnson over at was an adviser.

Other interesting cribsheets are one on stem cells, and one on climate change.


Tagged (by right-wing strings)

December 23, 2006

I was just recently tagged by Lubos Motl; after some thought, I happily did as instructed:

“1. Grab the book closest to you.
2. Open to page 123, go down to the fifth sentence.
3. Post the text of the next 3 sentences on your blog.
4. Name the book and the author.
5. Tag three people.”

And the outcome?

In light of this, it can be said that most significant for the fate of the Jews and for our understanding of the character of Germans’ attitudes towards Jews is that the misgivings about certain eliminationist measures that did exist among some Germans cannot, by and large, rightly be interpreted as having been expressions of principled disapproval of the eliminationist project and especially of the beliefs that gave birth to it. The principal exception to this is to be found among those Germans who, for various reasons, gave aid to the approximately ten thousand German Jews who tried to escape deportation by hiding. The isolation of these Germans and of others who stood by their Jewish spouses indicates how exceptional they were among the larger German populace.

These sentences were taken from the book Hitler’s Willing Executioners: Ordinary Germans and the Holocaust by Daniel J. Goldhagen.

Finally, I tagged Clifford V. Johnson, “Lost clown” (who is angry for a reason — or two), and Michael Nielsen. What a silly game. But, hey, it is christmas… 🙂

Merry christmas and happy holidays from Denmark (where xmas effectively has been scrapped due to global warming. Proof: Winter in Copenhagen in pictures, 2005, compared to 2006.)

Update: The picture from 2006 show some spoiled young people trying to clean up after certain riots in Copenhagen.

A Chat with Prof. Lisa Randall

November 9, 2006

Discover magazine is conducting a chat with Prof. Lisa Randall of Harvard University today at 2:00 PM EST:

I have reviewed Lisa’s excellent book, “Warped Passages”, here.

Best New Blog Title?

August 23, 2006

Help needed….

I’m thinking about changing the title of this blog to something more catchy in the near future; to something which is much easier to remember, like others which with much success are using titles such as cosmic variance, cocktail party physics, entropy bound, or sum over histories.

I have made up a few favorite potential titles, and would be very happy if you would cast a vote: pick the three best suggestions from the list below and rank them with one, two or three stars. Here’s the list:








Pick your three favorites (with one * – three ***). I’m looking forward to getting your help and seeing the final result 😉

(Note: all the titles above are – in one way or another – related to theoretical high energy physics; the “hidden sector” refers to fields that couple to the Standard Model fields only through gravitational-strength interactions; in quantum field theory, a “fixed point” is a quantum theory whose physics is scale-invariant; and the “chiral ring” is the OPE algebra of chiral fields, and so on….)