Confusion and a lot of questions exist as to detonation and pre-ignition. Sometimes you hear mistaken terms like pre-detonation. Detonation is one phenomenon that is abnormal combustion. Pre-ignition is another phenomenon that is abnormal combustion.
Martha R. Herbert, PhD, MD, is an assistant professor of neurology at Harvard Medical School, a pediatric neuroscientist at the Massachusetts General Hospital in Boston, and an affiliate of the Harvard-MIT-MGH Martinos Center for Biomedical Imaging.
Hilton Head, South Carolina. Martha Sharma recently retired from the National Cathedral School in Washington, D.C., after teaching geography there for 21 years. She is a former member of the AP Human Geography Development Committee and is currently president of the National Council for Geographic Education.She is also content adviser for AP Human Geography.he is a former member of the AP Human Geography Development Committee and is currently president of the National Council for Geographic Education. She is also content adviser for AP Human Geography.