geometrikal's channel

heard this on abc radio national today. awesome.

I solved the integral of something that contained a bessel function, and part of the solution is a gaussian hypergeometric series like this:

2F1[ (u+v)/2, (u+v+1)/2; v+1; -x^2 ]

I put this into wolfram alpha and experiemented with nice values like u = 3, v = 1, etc and got a nice small expressi...

This idea is completely obvious. Saying that Apple somehow invented it is just plain wrong. People have been talking to their computers in sci-fi for ages, e.g. Star trek. Go read neuromancer.

Nice one. Like the voice.

thats some trippy music

@scottclements78 bob's like a scarecrow that keeps all the southern rubbish out ;)

why dont they sing in german

@TheTabellarius

Replacing panels - after 25 years power output is 80%. Solar power stations use concentrators onto smaller sized cell with greater efficiency.

Lead acid batteries - due to their low energy density lead acid batteries would not be used. Energy from solar panels will go back into t...