Klara Dan von Neumann
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Klára Dán von Neumann
|Died||November 10, 1963 (aged 52)|
|Cause of death||Suicide by drowning|
Klára Dán was born in Budapest, Hungary on August 18, 1911 to Károly Dán and Kamilla Stadler, a wealthy Jewish couple. Her father had previously served in the Austro-Hungarian Army as an officer during World War I, and the family moved to Vienna to escape Béla Kun's Hungarian Soviet Republic. Once the regime was overthrown, the family moved back to Budapest. Her family was wealthy, and often held parties where Dán would meet many different people from various stations in life.
Dán married Ferenc Engel in 1931 and Andor Rapoch in 1936. She met Hungarian mathematician John von Neumann during a trip he made to Budapest prior to the outbreak of World War II. In 1938, von Neumann's first marriage ended in a divorce, and Dán divorced Rapoch to marry him.
After their wedding, Dán emigrated to the United States with von Neumann, where he held a professorship at Princeton University. In 1943, von Neumann moved to Los Alamos National Laboratory in New Mexico to work on calculations as part of the Manhattan Project. Dán remained at Princeton until 1946, working at the university's Office of Population Research.
After the war, Dán joined von Neumann in New Mexico to program the MANIAC I machine, which could store data, designed by her husband and Julian Bigelow. She then worked on the ENIAC (Electronic Numerical Integrator and Computer) on a project with von Neumann to produce the first successful meteorological forecast on a computer. Dán designed new controls for ENIAC and was one of its primary programmers. She trained a group of people drawn from the Manhattan Project to store programs as binary code.
After her husband's death from cancer in 1956, Dán wrote the preface to his Silliman Lectures. The lectures were published in 1958 and later edited and published by Yale University Press as The Computer and the Brain.
Dán married oceanographer and physicist Carl Eckart in 1958 and moved to La Jolla, California. She died in 1963 when she drove from her home in La Jolla to the beach and walked into the surf and drowned. The San Diego coroner's office listed her death as a suicide.
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