Probabilistic physics of failure approach to reliability : modeling, accelerated testing, prognosis and reliability assessment / Mohammad Modarres, Center for Risk and Reliability, University of Maryland, College Park, U.S.A., Mehdi Amiri, Department of Mechanical Engineering, George Mason University, Fairfax, U.S.A., Christopher Jackson, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, U.S.A.