Monthly Archives: August 2011

Maintaining Gaffneyis Gear

We took four of colgaffneyis polearms (3 pikes and a partisan) to Fort William and back last weekend. You can see how they traveled here.These take a lot of abuse at our events. The heads are always getting rusty. The shafts have not received any maintenance in 5 years to my certain knowledge, and I suspect much longer. The problem was similar to that of rehabbing old tools, which I often done before (e.g. these posts). However, there was an issue of scale. The partisan is 6 feet long. Two of the pikes measure 10 feet, and the third 14. Continue reading

The End of Time …

simulated in a Maryland lab

The Big Crunch: Physicists Make Time End

Physicists Recreate ‘End Of Time’ in Lab

(The technical details) Hyperbolic metamaterial interfaces: Hawking radiation from Rindler horizons and the “end of time”

It should be noted that this is a simulation of one possible way our universe might evolve, one that current observations suggest is incorrect. However, it is a solution of Einstein’s equations of General Relativity, and as such well worth studying.

When I was much younger something like this might have been called an “analog computer.” I have not seen that term much lately.

From Cocktail Party Physics