- H.E.L.P. (9th December, 2009)
- AHC- international organisation (8th December, 2009)
- Humanist Discussion Group (7th December, 2009)
- HCMC (6th December, 2009)
- The rural eco-friendly house in... (10th March, 2009)
- King Saud University (12th January, 2009)
- Stanford University (6th September, 2008)
- Stanford University (3rd September, 2008)
- University of Southern Queensland (2nd September, 2008)
- Brevard College - Castle Rock... (1st September, 2008)
