Leonard R. Kahn
AM stereo pioneer
Member Grade: Life Fellow
Age: 86; Died: 3 June
Leonard R. Kahn was founder and president of Kahn Communications, in Carle Place, N.Y. The company developed compatible AM digital (CAM-D), a hybrid digital format for AM broadcasting.
Before starting his company, Kahn was a radio engineer for several years at RCA Laboratories, in Princeton, N.J. There, he developed AM radio broadcast technology for high-frequency, shortwave, and single-sideband transmission.
He developed his own radio system, called the Kahn-Hazeltine digital stereo system, in 1958.
Kahn earned a bachelor’s degree in electrical engineering from Polytechnic Institute of Brooklyn (now part of New York University), in New York City.
Robert S. Ledley
Member Grade: Life Senior Member
Age: 86; Died: 13 July
Robert S. Ledley, a dentist turned biomedical researcher, invented the first computerized tomography (CT) scanner capable of producing cross-sectional images of any part of the body.
In 1956, Ledley became an assistant professor of electrical engineering at George Washington University’s School of Engineering, in Washington, D.C. Four years later, he founded the National Biomedical Research Foundation (NBRF), a nonprofit organization, also in Washington, D.C., dedicated to promoting the use of computers among biomedical scientists.
Ledley joined Georgetown University, in Washington, D.C., in 1970 as a professor of radiology, physiology, and biophysics and soon established the NBRF headquarters on the university’s campus. Three years later, he led the team of NBRF researchers that developed the computerized full-body scanner.
He received a doctor of dental surgery degree in 1948 from New York University, in New York City. He went on to earn a master’s degree in theoretical physics in 1949 from Columbia University.
Marzuki bin Khalid
Region 10 Vice Chair for Technical Activities
Member Grade: Senior Member
Age: 53; Died: 13 August
Marzuki bin Khalid was an IEEE volunteer for 25 years, serving most recently as Region 10 vice chair for Technical Activities.
Previously, Khalid was the region’s conference coordinator from 2008 to 2010 and secretary from 2006 to 2008.
Khalid was deputy vice chancellor at the University of Technology, Malaysia (UTM), Kuala Lumpur, where he oversaw engineering R&D. He was also a professor in the school’s electrical engineering department, as well as director of its Center for Artificial Intelligence and Robotics.
Recently he was given the honorific title of Dato’ by the governor of his home state of Malaka for contributions to UTM and to Malaysia. Khalid was a member of the IEEE Control Systems; IEEE Industrial Electronics; and IEEE Systems, Man, and Cybernetics societies.
He received a bachelor’s degree in electrical and power engineering in 1980 from UTM and also earned a bachelor’s degree in electrical engineering in 1983 from the University of Southampton, in England. In 1986, he received a master’s degree in control systems engineering from the Cranfield Institute of Technology, in England, and he earned a Ph.D. in neurocontrol in 1994 from the University of Tokushima, in Japan.