1998 – 2002: Germany, study period for Ph.D. degree.

2003            : South Africa   (paper presentation at IAAE conference).

2005            : Qatar  (paper presentation)

2006            : Egypt  (attended information technology course).

2007            : USA (research visit sponsored by Hewlett Foundation).

2007             : China (paper presentation at IATRC summer meeting)

2007           : Germany, short research visit sponsored by DAAD.

2008             : Washington DC, USA (paper presentation at IATRC winter meeting).

2008           : South Korea (paper presentation at IATRC summer meeting).

2008           : Great Britain (paper presentation at WASD conference).