Jonathan Fielding, 69, and Karin Fielding pledged $50-million worth of investment assets to the University of California at Los Angeles School of Public Health, where Dr. Fielding has worked as a faculty member since 1979. The assets are from holdings in Dimensional Fund Advisors, a private investment firm. The Fieldings placed no restrictions on the gift but said some of the money will go toward financial aid for students, faculty salaries and professorships, and other programs. The university will receive annual earnings from the investments and eventually the full amount. Dr. Fielding is also currently a professor of health services and pediatrics, and co-directs the university’s Center for Healthier Children, Families and Communities.