12572694 cfa76c9dd4fd7cfda89027206eea764f copiancestral http://gravatar.com/copiancestral copiancestral http://0.gravatar.com/avatar/cfa76c9dd4fd7cfda89027206eea764f http://0.gravatar.com/avatar/cfa76c9dd4fd7cfda89027206eea764f thumbnail # left repeat https://secure.gravatar.com/bg/12572694/28448c3f7bd979411781c317ceffd4b5 Andrés Marrugo Andrés Marrugo Andrés G. Marrugo is a PhD student in optical engineering at the Technical University of Catalonia (Spain). Barcelona http://andresmarrugo.net http://copiancestral.wordpress.com