who is the representative author of the research of just-in-time software defect prediction

The most prominent representative author of Just-in-Time Software Defect Prediction research is Dr. Nachiappan Nagappan, a professor at the University of Nebraska-Lincoln. He has published numerous papers and book chapters on the topic, including "Just-In-Time Defect Prediction: A Survey" (2008), "Just-In-Time Defect Prediction Using Machine Learning Techniques" (2009), and "A Comprehensive Survey of Just-In-Time Software Defect Prediction Research" (2013).