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Sign in username password forgot password? register here for free... Research articles   search articles   reviews guidelines   articles index My Science-advisor my alerts   my messages   my reviews   my favorites Google search Web Science-advisor Statistics Members: 1196 Articles: 1'234'128 Articles rated: 1075 01 December 2008	logout   Warning: Cannot modify header information - headers already sent by (output started at /var/www/science-advisor/doc/template.php:11) in /var/www/science-advisor/doc/menu/header.php on line 4 Warning: Cannot modify header information - headers already sent by (output started at /var/www/science-advisor/doc/template.php:11) in /var/www/science-advisor/doc/menu/header.php on line 5 Fatal error: Cannot redeclare rand_hexa() (previously declared in /var/www/science-advisor/doc/users/randhexa.php:3) in /var/www/science-advisor/doc/users/randhexa.php on line 11