General Genetic Algorithms for Ruby (gga4r) release 0.9

General Genetic Algorithms for Ruby (gga4r) is a library for executing generic algorithms easily.

Only 3 steps are needed in order to work with gga4r:

1. Choose a clase to evolve and define for her the fitness, combine and mutate methods.


2. With an array of last defined class instances (initial population), create a GeneticAlgorithm object.


3. Call GeneticAlgorithm's evolve method as many times as you want.

More info:

• gga4r website: http://gga4r.rubyforge.org


• gga4r rubyforge project: http://rubyforge.org/projects/gga4r


• gga4r spanish site: http://gga4r.rubyforge.org/es

DEISA Sessions (Distributed European Infrastructure for Supercomputing Applications)

This week I'm taking DEISA training sessions in Barcelona, they are teaching us how to submit tasks into most powerful supercomputers of Europe (DEISA Architecture).

Within this supercomputers we can meet Marenostrum, nowadays is the most powerful supercomputer in Europe and the World's fifth most powerful as you can see in www.top500.org. It's made of 10.240 CPUs Power PCs, 20 TeraBytes of RAM and 370 TeraBytes of disk. It's placed in a old chapel which gives it a special feeling.

Today I've been lucky and I could visit inside Marenostrum as you can see in this photos:







More photos: http://www.flickr.com/photos/spejman/tags/marenostrum/

Bayesian Networks for Ruby release 0.9

Bayesian Networks for Ruby (bn4r) permits create, modify, solve, import and export Bayesian Networks, give it a try and infer some probabilities with them!

This release includes suport for discrete variable nodes, now you can use nodes with values like {small, normal, big} instead of {true, false}.

Export to Microsoft Belief Network has been improved.

As previous releases you can solve your networks with enumeration_ask, prior_sample, rejection_sampling and likelihood_weighting algorithms.

Testing work will be appraised, if you are interested please contact me in http://rubyforge.org/projects/bn4r or at sergio.espeja (you know what ...) gmail.com.

More info:

• bn4r Website: http://bn4r.rubyforge.org
• bn4r Rubyforge project: http://rubyforge.org/projects/bn4r
• bn4r spanish website: http://bn4r.rubyforge.org/es