May 13th, 2008


13
May 08

EEE Update etc


Just got a call from home saying that my EEE was delivered today, now thats what i call super fast delivery, kudos to clove for being so speedy

On another note my dad is cycling from ballymoney in northern ireland to montouliers in the south of france, he has an EEEpc 701 with him and hes been using it to make a blog here


13
May 08

Another Uni Project

If anyone is interested in Erlang B Calculations, very relevent to any communications or engineering students, I’ve written a little quick piece of code to calculate them.

There are several levels of functionality in the code.
Erlang B itself only has 2 variables, System load in Erlangs, and the number of “trunks” (read: servers/call center operators/phone lines), and its output is a blocking probability from 0 to 1

All three of these variables or none atall can be defined at runtime;

  • The desired blocking probability can be input to stop the calculation at that point. (default 0)
  • The Load can be defined (See Erlang A) (default 1)
  • The maximum trunks to be calculated (default 100)

The code uses the unistd.h library for argument parsing so is more or less unix only (or cygwin alternativly) and long doubles for more or less everything inside the code.

Having tested the limits, it kinda conks out then calculating large (read 1000 erlangs) on large trunks (got as far as 1234 trunks, then died)

When i get a bit of time i might optimise the factorial part so it doesnt run thru the entire factorial sequence for each number.

Anyway, the code is here. I’m not wasting my time laying out code on blogger.


13
May 08

I want

Jeff Han, a researcher at NYU, surpassed himself again with the most georgous multitouch display interface I’ve ever seen (surface/iphone eat your heart out). I always love watching TED talks, and if anyone really wants to see a good reason why Powerpoint should be killed, I’d recomment Hans Roslings talk on global poverty here


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