Re: Particle Swarm Optimization

John Doty <jpd@[EMAIL PROTECTED]
> writes Re: Copyleft and embedded
Forth
[..]
> The problem with the BSD approach is well illustrated by SPICE, for 
> which there are several incompatible commercial versions. Operationally,

> these are only slight improvements on the Berkeley original, but the 
> changes are sufficiently difficult to reverse engineer that SPICE 
> remains balkanized. 

The improvements in LTSPICE are far from minor. It blows, e.g., PSPICE
out of the water, and is also far, far, better than HSPICE (for our 
kind of work).

>                     The user gets to pay through the nose while 
> struggling with the incompatibilities, since hardware manufacturers' 
> device model parameters and macromodels often aren't ****table.

Again, at least for our kind of work (power electronics), these models 
proved to be worthless, YMMV.

I do agree that SPICE should have had a licence that furthered technical
excellence of the program.

-marcel