Dra. Igusti Agung Ayu Ratnawati, M.Sc. Born in Talibeng, Karangasem, Bali. Completed his undergraduate education at Airlangga University, Surabaya in 1992 in the field or concentration of biophysics and became a lecturer at Udayana University starting in 1993, then continued his study at ITB (Bandung Institute of Technology) in 2002 with a concentration in biophysics. Thesis title: Analysis of Frog Muscle Fatigue Based on Contractions. Contribution of Several Public Activities to the Radioactive Content of Badung River in Bali. Radon Gas Radiation Effects from Buildings Made of Gypsum Potentially Causing Lung Cancer. Radon Gas Distribution in Gypsum Rooms and Lung Cancer Risk