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.
From Wikipedia, the free encyclopedia. Martha Herbert is an American physician and assistant professor of neurology at Harvard Medical School and pediatric neurologist at Massachusetts General Hospital. Herbert is also director of the TRANSCEND program at the Athinoula A. Martinos Center for Biomedical Imaging.
Joan Lunden. Joan Lunden was born on September 19, 1950 in Sacramento, California, USA as Joan Elise Blunden. She is an actress and writer, known for Good Morning America (1975), Walt Disney World Very Merry Christmas Parade (1992) and Free Willy 2: The Adventure Home (1995). She has been married to Jeff Konigsberg since April 18, 2000.