Tom Stoppard's "Arcadia," Twenty Years Later.
Novelist Brad Leithauser muses on "the finest play written in my lifetime": One sign of "Arcadia"'s greatness is how assuredly it blends its disparate chemicals, creating a compound of most peculiar properties. The play’s ingredients include sexual jealousy and poetasters and the gothic school of landscape gardening and duelling and chaos theory and botany and the perennial war between Classical and Romantic aesthetics and the maturing of mathematical prodigies. [more inside]
The Nature of Computation
- Intellects Vast and Warm and Sympathetic
: "I hand you a network or graph, and ask whether there is a path through the network that crosses each edge exactly once, returning to its starting point. (That is, I ask whether there is a 'Eulerian' cycle.) Then I hand you another network, and ask whether there is a path which visits each node exactly once. (That is, I ask whether there is a 'Hamiltonian' cycle.) How hard is it to answer me?" (via
) [more inside]
Aldo Cortesi blogs about the interface between computer science and visualisation. He has found some interesting applications for space-filling curves
: making colour maps
of images and of executable binary files
A bit more work and one can visualise entropy in binary files
. The cryptographic material sticks out like a sore thumb. [more inside]
The 'photocopy effect' applied to YouTube
What happens when you record a video
, upload it to YouTube, download it, and re-upload it over and over and over. After a while, it starts to look like this [30x]
and this 
and this 
and this 
. Inspired by Alvin Lucier's
experimental composition, I am Sitting in a Room
- Erik Verlinde
has a theory
that "gravitational attraction could be the result of the way information about material objects is organised in space..." Here's some related weblog discussions
and follow along on twitter
! (via /.
Quantum Mechanics: Myths and Facts (pdf)
, a recently-updated paper on the Cornell arXiv
peer-review site. By Hrvoje Nikolić of the Rudjer Bošković Institute in Croatia. [more inside]
Things Fall Apart.
Particularly in urban environments. Individually, the moments of entropy-in-action caught here may not mean much; collectively, they recite a visual poem about decay. A slightly melancholy site for you insomniacs out there. (By the way, you have to scroll right
to get to the thumbnails.)
Describing a New Entropy
A reformulation of Boltzmann-Gibbs entropy by one Constantino Tsallis is causing quite a buzz/stir in the theoretical physics community. It was originally published in 1988, but it sounds like it's only recently hit its stride. There's going to be a conference
on "Tsallis entropy" in October co-chaired by Murray Gell-Mann!