Twelve Hawaii leaders in technology, sustainability, education, and community engagement will present at the 5th annual TedxHonolulu conference on Saturday at the University of Hawaii at Manoa in Honolulu. Themed “Paradigm Shift,” speakers will speak about a turning point in their life, or the “Aha!” moment, according to Genesis Leonge, TedxHonolulu’s lead curator. The presenters were selected from an audition pool of about 70.