thanks Syaryzad. well, surprisingly, initially i wanted to do research on disabled persons and more into accessibilty in landscape design (barrier-free design). it seems we both go on the other way round. hehe. i’l take note on your advice and suggested references.
oh and yes, i’m working out to spend few weeks to conduct field work in two local zoos. both have different approach in exhibiting orangutans. so, by this, it will give a clear comparison on the outcome later on. best of luck for u too!