JAY W. LOTSPEICH ’55, a business executive, died June 28, 2012, at age 79. The son of Bascom Bradshaw Lotspeich of the class of 1925, he was a member of Psi Upsilon and served in the U.S. Navy. He received an MBA from the University of Miami and joined his family’s contracting firm in Miami, Fla, now called Lotspeich Company. He rapidly expanded the scope of the business, established offices in other cities, and founded All Interior Supply. Among those who survive are his wife, Beth Pankey Lotspeich; three children, including Bradshaw T. Lotspeich ’79 and Kathryn Lotspeich Villano ’86; his son-in-law, Christopher J. Petricone ’82; six grandchildren; his sister; and a nephew, Christopher C. Lotspeich ’87.

WILLIAM F. LUDINGTON, 71, a retired business executive, died Nov. 27, 2006. He was a member of Delta Kappa Epsilon and served in the US Army. He joined the Chase Bag Company in 1961, a member of the fourth among five generations in his family to work for this company that had been established in 1847. He served in several capacities and then as president and CEO at the headquarters in Greenwich, Conn. Active in his community, he was co-chairman of the Board of the Forum for World Affairs in Stamford He is survived by his wife, Betty Ann Erickson Ludington, two daughters, two sons, and six grandchildren.

DOUGLAS E. NACHOD, a retired assistant professor at SUNY Cortland, died July 12, 2010. He was 76. He was a member of the John Wesley Club, received his degree with honors and with distinction in history, and was elected to Phi Beta Kappa. He received master’s and doctoral degrees from Harvard University.

MARTIN W. LEVENSON, 73, an actuary who retired as senior vice president of Segal Advisors after a 32-year career in the business, died May 26, 2010. He was a member of the John Wesley Club. A pioneer in the field of investment performance analysis, he started as an actuary with the Martin E. Segal Company and then helped to start the firm’s investment consulting business. In 1969, when Segal Advisors, Inc., was formed, he was named its head. Survivors include his wife, Eleanor Rabinowitz Levenson; three children; several grandchildren; and a niece, Jill A. Kaufman ’89.

ROBERT H. LARSON, a retired consultant for Exxon Corporation, died May 6, 2010, at age 74. A member of Delta Tau Delta, he received a master’s degree from MIT.’s Sloan School of Management He is survived by his wife, Patricia Flynn Larson; two children, including Elisabeth J. Larson-Harsch ’84; and two grandchildren.

STEPHEN M. LEVIN, M.D., 70, who played a leading role in bringing attention to the medical needs of thousands of firefighters, police officers and other rescue workers who breathed in the caustic dust from the collapse of the World Trade Center Towers, and who was co-director of the Irving J. Selikoff Center for Occupational and Environmental Medicine at the Mount Sinai School of Medicine, died Feb. 7, 2012.Elected to Phi Beta Kappa, he received his degree with honors and then received his medical degree from New York University. An advocate for workers and a specialist in occupational medicine, his research and advocacy led to the passage of the James Zadroga 9/11 Health and Compensation Act, which allocated money to provide medical care to responders. Among those who survive are his wife, Robin Levin; his mother, Sarah Schurr; three sons; his daughter; and his sister.

THOMAS K. LONGSTRETH, 52, the former U.S. undersecretary of defense for readiness and training, died April 28, 2009. After receiving a master’s degree in defense analysis and security policy studies at George Washington University, he worked successively for the U.S. Senate, the Federation of American Scientists, and the Defense Department, where he first worked on the staff of the Joint Chiefs of Staff and later directed task forces for the secretary of defense on Iraq, Bosnia, and Somalia. He had also been associated with Teledyne Brown Engineering, the Rand Corporation, and the Center for Naval Analyses. In 1988 he received a MacArthur Foundation grant and in 1990 a Council of Foreign Relations fellowship. Survivors include his companion, Crystal Denunzio, his companion’s daughter, his mother and stepfather, a brother, and two sisters.

DORATHEA ANN LINDBECK, 54, an artist, bookbinder, and teacher, died Sept. 5, 2011. She received an MFA from the Massachusetts College of Art. Survivors include her husband, William D. Stempel, one son, and a brother and two sisters.

PETER J. LIPTON, 53, the Hans Rausing Professor and Head of the Department of the History and Philosophy of Science at the University of Cambridge and a Fellow of King’s College, died Nov. 25, 2007. After receiving his degree cum laude, he received his PhD from the University of Oxford. He taught at Williams College and then returned to England, where he joined the University of Cambridge. He lectured and published widely, and he was an extraordinarily popular teacher, supervising students at all levels. He was recognized as one of the leading epistemologists and philosophers of science in the world. His philosophical interests included the structures of explanation and inference in science, the nature of scientific progress, social epistemology, science and religion, and various topics in biomedical ethics. He was also a member of the Nuffield Council on Bioethics and chaired its working party on pharmacogenetics. He was the author ofInference to the Best Explanation and was the 2004 Medawar Prize Lecturer of the Royal Society. He is survived by his wife, Diana Lipton, two sons, and his mother.

An investment banker, died Feb. 17, 2013, at age 53. He received an MBA from New York University and embarked on an investment banking career that took him and his family around the world. Survivors include his wife, Jeanne Clark Langille, four children, three siblings, and a large extended family.