Cornell President Hunter Rawlings today announced the appointment of three interim deans, filling key positions in the Cornell University Medical College, the S.C. Johnson Graduate School of Management and the College of Art, Architecture and Planning.

Dr. Carl F. Nathan, the Stanton Griffis Distinguished Professor of Medicine and senior associate dean for research at the medical college, will replace Dr. Robert Michels as dean of the medical college, effective July 1. Dr. Michels announced in December that he was stepping down from the post at the end of the spring semester.

Thomas R. Dyckman, the Ann Whitney Olin Professor of Accounting and Quantitative Analysis and associate dean for academic affairs at the Johnson School, has been named acting dean effective June 10. He replaces Alan G. Merten, who in March was named president of George Mason University effective July 1.

Stanley Bowman, associate dean of the College of Art, Architecture and Planning, was named acting dean effective July 1. He replaces William G. McMinn, who will return to the faculty.

"The depth of high-quality leadership in the ranks of Cornell's distinguished faculty is reflected in the excellence of the interim deans we are announcing today," Rawlings said. "They will give strong direction to their respective colleges as we move forward to conclude the existing searches in the medical college and the College of Art, Architecture and Planning and as we initiate the search for the next dean of the Samuel C. Johnson Graduate School of Management."

Dr. Nathan received his bachelor of arts degree summa cum laude from Harvard College in 1967 and graduated magna cum laude from Harvard Medical School in 1972. He completed his residency at Massachusetts General Hospital in 1974.

He was a clinical associate in the immunology branch of the National Cancer Institute, 1974-76; Fellow in Medical Oncology, Yale-New Haven Hospital, 1976-77; assistant professor, Laboratory of Cellular Physiology and Immunology, The Rockefeller University, 1977-83; associate professor, The Rockefeller University, 1983-85; adjunct professor, Cornell University Medical College, 1985-86; and visiting physician, The Rockefeller University Hospital, 1986-89. He currently is attending physician, The New York Hospital and adjunct professor, The Rockefeller University. He was named senior associate dean for research in 1995.

Dyckman received his bachelor of arts degree with distinction from the University of Michigan in 1954; his M.B.A. with high distinction from Michigan in 1955; and his Ph.D. from Michigan in 1961.

He was an assistant professor at the University of California at Berkeley from 1961 to 1964 and joined Cornell as an associate professor in 1964. He was named a full professor in 1968, the Ann Whitney Olin Professor of Accounting and Quantitative Analysis in 1977 and associate dean for academic affairs in 1983. He also served as acting dean from October 1994 through April 1995.

Bowman received his bachelor of arts degree from the University of California at Berkeley in 1959 and his B. Architecture degree from Berkeley in 1964.

He worked as an architect in San Francisco and Albuquerque, N.M., from 1966 to 1973 before coming to Cornell in 1973 as an assistant professor. He was named associate professor in 1979; served as chairman of the art department from 1980-85; was promoted to full professor in 1987; served as acting dean of the College of Art, Architecture and Planning in spring 1992; and, in 1992, was named associate dean.

Nationwide searches are under way to fill the deanships.