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OCR for page 267
SAMUEL SILVER
1915-1976
BY JOHN R. WHINNERY
SAMUEL SILVER, Professor of Engineering Science at the University
of California, Berkeley, died of a heart attack on November 5,
1976. He left a legacy of elegantly framed research results in
antenna theory and upper atmosphere physics, of institutions he
had built that carry on creative research in electronics and the
space sciences, and of many contributions of talent and of wisdom
to engineering education and to his profession.
Dr. Silver was born in Philadelphia, Pennsylvania, February 25,
1915. He received his Bachelor of Arts and Master of Arts degrees
in physics from Temple University in 1935 and 1937, respectively,
and his Doctor of Philosophy degree in solid-state physics from the
Massachusetts Institute of Technology (MIT) in 1940. He served as
a postdoctoral Research Assistant at the Ohio State University in
1940-41 and as an Instructor and Assistant Professor of Physics at
the University of Oklahoma from 1941 to 1943. He thenjoined the
antenna group of the Radiation Laboratory, MIT, and remained
there until that laboratory closed at the end of World War II.
Following a year in the Antenna Research Branch of the Naval
Research Laboratory, he was appointed Lecturer and then As-
sociate Professor in the Electrical Engineering Department of the
University of California at Berkeley, becoming Professor in 1950.
He was a member of that department until his death. Administra-
tive service at the University included assignments as Director of
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the Electronics Research Laboratory from 1956 until 1960 and as
Director of the Space Science Laboratory from 1960 until 1970.
The University of California used Dr. Silver's talents for many
committee assignments in addition to the formal administrative
assignments. Among these was an important committee leading to
the formation of the Radio Astronomy Laboratory and another
resulting in the Electronics Research Laboratory. He was advisor
and consultant to industry and to government organizations, in-
cluding the Naval Research Laboratory and the National Aeronau-
tics and Space Administration. Activities in the Institute of Electri-
cal and Electronics Engineers (IEEE) included membership on the
Awards Board and several assignments on the WESCON technical
program committees. His continuing service for the National Re-
search Council of the National Academy of Sciences was through
the International Radio Scientific Union (URSI). He was Chairman
of U.S. Commission 6 from 1950 to 1954, and then held posts of
Secretary and Vice-Chairman of the National Committee. He be-
came Chairman of the International Commission 6 in 1952, Vice-
President in 1963, and was its President from 1966 to 1969. In
1972 he received the unusual distinction of becoming its perma-
nent Honorary President.
Dr. Silver's first research contributions were in the theory of solid
state, extending methods developed by the great John C. Slater, his
Ph.D. mentor. Upon accepting assignment in the antenna group of
the MIT Radiation Laboratory, he concentrated upon fundamental
diffraction problems as applied to microwave radar antennas.
Several elegant papers and the definitive book, Microwave Antenna
Theory and Design, record much of the work of that period. He
continued work on diffraction and scattering theory at Berkeley,
concentrating on limits of accuracy in geometrical optics and other
approximations. He also studied existence and uniqueness
theorems for the exterior problem of electromagnetics. His stu-
dents built a caret ally designed experimental facility to make
measurements designed to check the validity of these theories.
Although he always retained an interest in the continuing work on
this facility, his main interest in recent years was in radio astronomy
and the upper atmosphere. Using microwave and millimeter-wave
268
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techniques, he and his students studied radiation from the planets
and the absorption characteristics of ozone in the upper atmo-
sphere. The program that he organized at the Space Science Labo-
ratory included research in the spectroscopy of planetary atmos-
pheres, lunar geology, the physics of the upper atmosphere,
information-processing of satellite data, and the social uses of the
space program.
Dr. Silver received many honors for his personal and profes-
sional contributions. He was a Fellow of the Institute of Electrical
and Electronics Engineers, of the American Geophysical Union,
and of the American Physical Society. He was a recipient of a John
Simon Guggenheim Memorial Fellowship in 1953 for his work on
scattering and diffraction of electromagnetic waves and again in
1960 for his research in physics of the upper atmosphere. He was,
as noted earlier, permanent Honorary President of URSI. He was
elected to the National Academy of Engineering in 1968 and was
the second recipient of the John T. Bolljahn Memorial Award for
contributions to antenna theory. He received an honorary degree
of Doctor of Science in 1963 and a Distinguished Alumnus Award
in 1964 from Temple University.
The characteristic of Samuel Silver's contributions to everything
he did teaching, guiding research, advising his colleagues in and
out of the university, or undertaking hobbies such as photography
and writing was a concern for excellence and an equal concern
for human values and the highest of ethical standards. His family
was always his first priority, so that his wife, Marjorie, his son,
Daniel, his daughter, Deborah Brewer, and all of their families
have experienced a deep sense of loss, as have his friends and
colleagues. But he will be remembered through this lasting contri-
bution to the institutions he helped build and to the attitudes of
everyone he worked with.
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