License granted by Aminah Ayu null (comap@nus.edu.sg) on 2011-07-06T01:30:05Z (GMT): The author grants the NUS Academic Research Repository an irrevocable non-exclusive license to reproduce, translate between formats and/or media make multiple copies for purposes of security, back-up and preservation and/or distribute the author's submission (including the abstract and metadata or catalog entries) worldwide in print and electronic format and in any medium, including but not limited to audio or video. Author warrants that the submission is original work, and that author has the right to grant the rights contained in this license. Author also represents that the submission does not, to the best of his or her knowledge, infringe upon anyone's copyright. If the submission contains material for which author does not hold copyright, author represents that he/she has obtained the unrestricted permission of the copyright owner to grant NUS the rights required by this license, and that such third-party owned material is clearly identified and acknowledged within the text or content of the submission. Author further warrants that the submission contains nothing obscene or libelous, and the Author indemnifies the university from any loss, injury or damages incurred in the consequence of any breach of this warranty. NUS agrees that the university will clearly identify author's name(s) as the author(s) or owner(s) of the submission, and will not make any alteration, other than as allowed by this license, to author's submission.