American Philosophical Society
Member History

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61Name:  Dr. Wallace S. Broecker
 Institution:  Lamont-Doherty Earth Observatory, Columbia University
 Year Elected:  2015
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  105. Physical Earth Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1931
 Death Date:  February 18, 2019
   
 
For more than half a century Wally Broecker devoted his life to study of the role of the oceans in climate change. By using isotopic analysis to study physical mixing and chemical cycling in the ocean, he developed a picture of the ocean’s thermohaline circulations as comprising a conveyor belt. He showed this global conveyor belt to be susceptible to sudden shifts from one mode to another, and in the process able to trigger changes in climate that are not slow to develop but instead abrupt. This conceptual framework, which he outlined in more than 450 papers and ten books, provides an essential starting point for our present-day understanding of climate, dating back to the Pleistocene and extending forward to its long-term future outlook. Broecker was a recipient of the National Medal of Science (1996) and numerous other honors. Wallace Broecker died February 18, 2019 in Manhattan at the age of 87.
 
62Name:  Dr. Harvey Brooks
 Institution:  Harvard University
 Year Elected:  1961
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  106. Physics
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1915
 Death Date:  May 28, 2004
   
63Name:  Ernest W. Brown
 Year Elected:  1898
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1857
   
64Name:  Dr. Harrison S. Brown
 Year Elected:  1966
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1917
 Death Date:  12/8/86
   
65Name:  Oliver E. Buckley
 Year Elected:  1942
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1887
 Death Date:  12/14/59
   
66Name:  Arthur F. Buddington
 Year Elected:  1931
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1890
 Death Date:  12/25/80
   
67Name:  Dr. E. Margaret Burbidge
 Institution:  University of California, San Diego
 Year Elected:  1980
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  101. Astronomy
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1919
 Death Date:  April 5, 2020
   
 
English-born American astronomer Eleanor Margaret Burbidge was the first woman to be appointed director of the Royal Greenwich Observatory. She was at the forefront in obtaining and interpreting quasar data and made notable contributions to astrospectroscopy, radio galaxies, masses and evolution of normal galaxies, and the chemical composition of stars. Dr. Burbidge served as assistant director and acting director of the Observatory of the University of London from 1948-51. In 1955 her husband, theoretical astrophysicist Geoffrey Burbidge, obtained a Carnegie fellowship for astronomical research at the Mount Wilson Observatory in California. Because women were then ineligible for such an appointment, she chose to accept a minor research post at the California Institute of Technology. In 1957 she became Shirley Farr Fellow and, later, associate professor at Yerkes Observatory at Williams Bay, Wisconsin. She also served as research astronomer and professor of astronomy at the University of California, San Diego (UCSD) before taking a leave of absence to serve as director of the Royal Greenwich Observatory in 1972. Her Greenwich duties did not come with the traditional honorary title of Astronomer Royal, which instead was given to a male astronomer, in another instance of discrimination against women in the astronomical community. A longtime champion of opportunities in science for women, she refused the Annie J. Cannon Prize from the American Astronomical Society (AAS) in 1972 because, as it was an award for women only, it represented for her another facet of the same discrimination. Her action led to the formation of a standing AAS committee for the status of women in astronomy. From 1979-88 Dr. Burbidge directed UCSD's Center for Astrophysics and Space Sciences, where she helped develop some of the Hubble Space Telescope's original instruments. She became a professor emeritus of the university in 1990. E. Margaret Burbidge died on April 5, 2020 in San Francisco, California at the age of 100.
 
68Name:  Vannevar Bush
 Year Elected:  1937
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1890
 Death Date:  6/28/74
   
69Name:  Dr. Melvin Calvin
 Institution:  University of California, Berkeley
 Year Elected:  1960
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  102. Chemistry and Chemical Biochemistry
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1911
 Death Date:  1/8/97
   
70Name:  William W. Campbell
 Year Elected:  1903
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1863
 Death Date:  6/14/38
   
71Name:  Annie Jump Cannon
 Year Elected:  1925
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1863
 Death Date:  4/13/41
   
72Name:  Dr. George F. Carrier
 Institution:  Harvard University
 Year Elected:  1976
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  103. Engineering
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1918
 Death Date:  March 8, 2002
   
73Name:  Dr. Vinton G. Cerf
 Institution:  Google
 Year Elected:  2008
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  107
 Residency:  Resident
 Living? :   Living
 Birth Date:  1943
   
 
Vinton G. Cerf is vice president and chief Internet evangelist for Google. Cerf served as a senior vice president of MCI from 1994-2005, as vice president of the Corporation for National Research Initiatives from 1986-1994, as vice president of MCI from 1982-1986, and as Principal Scientist, United States Defense Advanced Research Projects Agency, Information Processing Techniques Office from 1976-1982. Cerf was a member of the Stanford University faculty from 1972-1976. He served as chairman of the board of the Internet Corporation for Assigned Names and Numbers (ICANN) from 2000-2007 and was founding president of the Internet Society. Widely known as one of the "Fathers of the Internet," Cerf is the co-designer of the TCP/IP protocols and the architecture of the Internet. He received the U.S. National Medal of Technology in 1997 and the 2004 ACM Alan M. Turing Award. In November 2005, he was awarded the Presidential Medal of Freedom and in April 2008 the Japan Prize. In 2018 he won a Science Award from the Franklin Institute. He is a Fellow of the IEEE, ACM, and American Association for the Advancement of Science, the American Academy of Arts and Sciences, the International Engineering Consortium, the Computer History Museum. He is a member of the National Academy of Engineering and the National Academy of Sciences. He is an honorary Freeman of the City of London. Cerf holds a Bachelor of Science degree in Mathematics from Stanford University and Master of Science and Ph.D. degrees in Computer Science from UCLA. He was elected a member of the American Philosophical Society in 2008.
 
74Name:  Dr. Subrahmanyan Chandrasekhar
 Institution:  University of Chicago
 Year Elected:  1945
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  101. Astronomy
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1910
 Death Date:  8/21/95
   
75Name:  Dr. Shiing-shen Chern
 Institution:  University of California, Berkeley
 Year Elected:  1989
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  104. Mathematics
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1911
 Death Date:  December 3, 2004
   
76Name:  Dr. Alfred Y. Cho
 Institution:  Bell Laboratories, Lucent Technologies
 Year Elected:  1996
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  103. Engineering
 Residency:  Resident
 Living? :   Living
 Birth Date:  1937
   
 
Alfred Y. Cho was born July 10, 1937 in Beijing, China. He retired as the Semiconductor Research Vice President, Bell Laboratories, Lucent Technologies in 2001. He received his B.S., M.S., and Ph.D. in electrical engineering from the University of Illinois in 1960, 1961, and 1968, respectively. In 1961, prior to obtaining his Ph.D. degree, he worked at Ion Physics Corporation, Burlington, Massachusetts, a subsidiary of High Voltage Engineering Corporation, where he studied charged micron-sized solid particles in high electric fields. In 1962, he joined TRW-Space Technology Laboratories, Redondo Beach, California, and engaged in research in high current density ion beams. He returned to the University of Illinois in 1965 and received a Ph.D. degree in electrical engineering in 1968. Upon his graduation in 1968, he joined Bell Laboratories, Murray Hill, New Jersey as a Member of Technical Staff and was promoted to Department Head in 1984. He was named Director of the Materials Processing Research Laboratory in 1987 and Semiconductor Research Vice President in 1990. He is now an Adjunct Semiconductor Research Vice President, Bell Labs, Lucent Technologies, and an Adjunct Professor at the University of Illinois. He has made seminal contributions to materials science and physical electronics through his pioneering development of the molecular beam epitaxy (MBE) crystal growth process. He demonstrated that MBE could be used to prepare epitaxial films one atomic layer at a time, with exceptional control at atomic dimensions and further showed that these films could be the basis of devices with never before realized electrical and optical properties. His work has bridged many disciplines ranging from fundamental quantum physics, through epitaxial crystal growth, to device fabrication and testing. The capabilities of MBE have allowed new fields of materials research to develop. The ability to precisely make quantum wells has had a far-reaching impact, ranging from classroom physics to revolutions in electronic and optical devices for the consumer electronics, computer and communications industries MBE is broadly used today for advanced multilayer crystal growth and has led to radically new devices including high-speed transistors, microwave devices, laser diodes and detectors. Most of the semiconductor lasers used in today's compact disc players and CD-ROM'S are manufactured using MBE-grown material. Presently, MBE is used to produce the Hall sensors used as disk drive speed controllers for computers and VCRs. High electron mobility transistors (HEMTs) which are utilized as high speed circuit components and in high frequency, low noise, direct broadcast satellite and wireless communications are manufactured by MBE. This impact of MBE on fundamental science has been as dramatic as its impact on semiconductor technology. A significant ongoing contribution of MBE is the experimental generation of low dimensional systems. The discovery of an entirely new state of electrons, the fractional quantized Hall effect, was made possible as a result of MBE crystal quality. More recently (1994) he and coworkers demonstrated a fundamentally new type of laser which is a unipolar intersubband semiconductor laser called the quantum cascade (QC) laser. Dr. Cho has authored over 590 papers in surface physics, crystal growth, and device physics and performance. He holds 75 patents on crystal growth and semiconductor devices related to MBE. He is a recipient of the Electronics Division Award of the Electrochemical Society (1977), the American Physical Society International Prize for New Materials (1982), the IEEE Morris N. Liebmann Award (1982), the GaAs Symposium Award - Ford (1986), the Heinrich Welker Medal - Siemens (1986), the Solid State Science and Technology Medal of the Electrochemical Society (1987), the World Materials Congress Award of ASM International (1988), the Gaede-Langmuir Award of the American Vacuum Society (1988), the Industrial Research Institute Achievement Award of the Industrial Research Institute, Inc. (1988), the New Jersey Governor's Thomas Alva Edison Science Award (1990), the International Crystal Growth Award of the American Association for Crystal Growth (1990), the Asian American Corporate Achievement Award (1992), the AT&T Bell Labs Fellow Award (1992), the National Medal of Science, presented by President Clinton (1993), the Newcomb Cleveland Prize of the American Association for the Advancement of Science (1993-94), the IEEE Medal of Honor (1994), the Materials Research Society Von Hippel Award (1994), The Elliott Cresson Medal of the Franklin Institute (1995), the Computer and Communications Prize of the C & C Foundation, Japan (1995), the New Jersey Inventors Hall of Fame (1997), Honorary Doctor of Engineering, University of Illinois at Urbana-Champaign (1999), the Willis E. Lamb Medal for Laser Physics (2000), the University of Illinois Alumni Achievement Award (2000), the IEEE Third Millennium Medal (2000), the NASA Group Achievement Award (2000), Honorary Doctor of Science Degree, City University of Hong Kong (2000) and the Honorary Doctor of Science, Hong Kong Baptist University (2001), and the 2005 National Medal of Technology, announced and presented by President Bush in 2007. He is a Fellow of the Institute of Electrical and Electronics Engineering, the American Physical Society, and the American Academy of Arts & Sciences. He is a member of the U. S. National Academy of Engineering (1985), the National Academy of Sciences (1985), the Third World Academia of Sciences (1987), the Academia Sinica (1990), the Chinese Academy of Sciences (1996), and the American Philosophical Society (1996). He is married to Mona Willoughby; they have four children, Derek, Deidre, Brynna, and Wendy. His outside interests include painting, calligraphy, photography, table tennis, and most recently, learning how to play golf.
 
77Name:  Dr. Steven Chu
 Institution:  Stanford University
 Year Elected:  1998
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  106. Physics
 Residency:  Resident
 Living? :   Living
 Birth Date:  1948
   
 
Steve Chu became Berkeley Lab's sixth director on August 1, 2004 and served in that capacity through 2008, when he was named Secretary of Energy in the incoming Obama Administration. He was confirmed as Secretary on January 20, 2009 and returned to Stanford in 2013 as William R. Kenan, Jr., Professor of Humanities and Sciences, Professor of Physics, and Professor of Molecular and Cellular Physiology. A Nobel Prize-winning scholar and international expert in atomic physics, laser spectroscopy, biophysics and polymer physics, Dr. Chu oversaw the oldest and most varied of the Department of Energy's multi-program research laboratories, the Berkeley Lab. Berkeley Lad has an annual budget of over $600 million and a workforce of about 4,000. His distinguished career in laboratory research began as a postdoctoral fellow in physics at the University of California's Berkeley campus from 1976-78, during which time he also utilized the facilities of Berkeley Lab. His first career appointment was as a member of the technical staff at AT&T Bell Laboratories in Murray Hill, N.J. where, from 1978-87, his achievements with laser spectroscopy and quantum physics became widely recognized. During the last four years there, he was Head of the Quantum Electronics Research Department, during which time much of his groundbreaking work in cooling and trapping atoms by laser took place. That work eventually led to the Nobel Prize in Physics in 1997, an honor he shared with Claude Cohen-Tannoudji of France and United States colleague William D. Phillips. Their discoveries, focusing on the so-called "optical tweezers" laser trap, were instrumental in the study of fundamental phenomena and in measuring important physical quantities with unprecedented precision. At the time, Dr. Chu was the Theodore and Frances Geballe Professor of Physics and Applied Physics at Stanford University, where he remained for 17 years as a highly decorated scientist, teacher and administrator. While at Stanford, he chaired the physics department from 1990-93 and from 1999-2001. He is a member of the National Academy of Sciences, the American Academy of Arts & Sciences, and l'Academica Sinica. He is also a foreign member of the Chinese Academy of Sciences and the Korean Academy of Sciences and Technology. Dr. Chu has won dozens of awards in addition to the Nobel Prize, including the Science for Art Prize, the Herbert Broida Prize for Spectroscopy, the Richtmeyer Memorial Prize Lecturer, the King Faisal International Prize for Science, the Arthur Schawlow Prize for Laser Science, and the William Meggers Award for Laser Spectroscopy. He was a Humboldt Senior Scientist and a Guggenheim Fellow. In 2008 he delivered the Hans Bethe Lecture at Cornell University entitled "The World's Energy Problem and What We Can Do About It." Born in St. Louis and raised in New York, Dr. Chu earned an A.B. in mathematics and a B.S. in physics at the University of Rochester and a Ph.D. in physics at UC Berkeley. He is author or co-author of more that 200 articles and professional papers, and over two dozen former members of his group are now professors at leading research universities around the world.
 
78Name:  Dr. Ralph J. Cicerone
 Institution:  National Academy of Sciences; University of California, Irvine
 Year Elected:  2000
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  105. Physical Earth Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1943
 Death Date:  November 5, 2016
   
 
Ralph Cicerone received his Ph.D. in electrical engineering, with a minor in physics, from the University of Illinois in 1970. He joined the faculty of the University of Michigan in 1972 as a research scientist and assistant professor in the department of electrical and computer engineering. In 1978 he moved to the Scripps Institution of Oceanography at the University of California, San Diego, where he was a research chemist. He served as a senior scientist and Director of the Atmospheric Chemistry Division at the National Center for Atmospheric Research from 1980-89. He then became the Daniel G. Aldrich Professor of Earth System Science at the University of California, Irvine, where he chaired the department of Earth System Science from 1989-94. Dr. Cicerone was appointed Chancellor of the University of California, Irvine in 1998. In 2005 he became President of the National Academy of Sciences and was reelected in 2011. He served until 2016. Ralph Cicerone's research has greatly increased our understanding of the biogeochemical cycling of trace gases through the atmosphere, especially concerning ozone depletion and increased greenhouse gases such as methane. He was one of the first to point out the potential for global ozone depletion by stratospheric chlorine. With Ramanathan and with Dickinson, he wrote early papers on the radiative forcing of global climate change due to trace gases and he lectured widely on human causes of climate change and energy usage. In addition to the cumulative body of research, he was a leader in science policy issues. Dr. Cicerone received the United Nations Environment Program Ozone Award in 1997, the Bower Award and Prize for Achievement in Science from the Franklin Institute in 1998, and the American Geophysical Union's 2002 Roger Revelle Medal in recognition of outstanding research contributions to the understanding of the Earth's atmospheric processes, and the 2004 Einstein Prize for Science from the World Cultural Council. A member of the National Academy of Sciences, the American Academy of Arts & Sciences, the Accademia dei Lincei and the Russian Academy of Sciences, he also served as president of the American Geophysical Union. He was elected a member of the American Philosophical Society in 2000. Ralph Cicerone died November 5, 2016, at the age of 73.
 
79Name:  Hans T. Clarke
 Year Elected:  1943
 Class:  1. Mathematical and Physical Sciences
 Residency:  Resident
 Living? :   Deceased
 Birth Date:  1887
 Death Date:  10/21/72
   
80Name:  Dr. John Clarke
 Institution:  University of California, Berkeley
 Year Elected:  2017
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  106. Physics
 Residency:  Resident
 Living? :   Living
 Birth Date:  1942
   
 
John Clarke has led in the understanding and the development of the SQUID (Superconducting Quantum Interference Device) and exploration of this high sensitivity device for fundamental studies and applications. He has explored and demonstrated how this device can be used for measurements with a sensitivity up to the quantum mechanical limit. His studies have addressed the sources of 1/f noise, the limits of quantum computing, and the applications of SQUIDs for geological exploration and medical imaging. Clarke has co-authored the "handbook" of SQUID applications for high sensitivity electromagnetic measurements in a wide variety of fields and is universally known for this work.
 
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