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Clarence Samuel Clay, Jr. (1923–2011) was a geophysicist specialized in oceanography. He was known for his contributions in acoustics. Although he signed most of his papers, "C.S. Clay", he was called simply, "Clay" by his friends, students, and colleagues. He was also known as "Clay Clay". ==Biography== Clay grew up living in Emporia, Kansas and he was known as C. S. During grade school C.S was a flying model airplane designer, builder, and competitor. To become successful he taught himself the necessary mathematics he needed. In high school he was a particularly good student in chemistry and music. He graduated from Emporia High School June 1941. That fall he became a freshman at Kansas State College (now Kansas State University), but left to serve in the Army during World War II. After basic training, he was placed in specialized programs at the University of Cincinnati and Ohio State University. He was then assigned to the Army Signal Corps to maintain and operate electronic equipment. While in Ohio, he met Jane Edwards and, after completion of Clay’s training, they were married in 1945. Clay’s group was chosen to maintain electronic equipment during the planned invasion of Japan. After separation from the Army, Clay completed both the Bachelor’s (1947) and Masters (1948) degrees in Physics at Kansas State University. At the University of Wisconsin-Madison, his doctoral dissertation under Professor Gibson Winas was entitled, “Field Strengths and Spectra of High Frequency Gas Discharges.” After completing the PhD in 1951, Clay taught for one year at the University of Wyoming, but then joined the Carter Oil Company Research Laboratory in Tulsa, Oklahoma, as a Research Physicist to develop new methods for geophysical exploration . In 1955 Clay moved to the Hudson Laboratories of Columbia University where he was a Senior Research Associate for marine geophysical research. Here Clay worked in group specializing in marine acoustics that group located several important U.S. and Russian sunken ships. At Hudson Labs, he presumably had access to one of the early IBM 650 computers.〔"Columbia University Computing History" http://www.columbia.edu/cu/computinghistory〕 With his colleague I. Tolstoy, he coauthored a monograph on ocean acoustics published in 1966. Clay worked on problems in signal processing that led to five patents between 1959 and 1967. His 1959 patent for a “multiple transducer array … of particular utility in the area of seismic prospecting” US Patent 2,906,363 has been referenced as recently as 2000 by several petroleum companies. His 1964 patent for “Signal Correlation Method and Means” US Patent 3,158,830 for "oceanic depth measurement" refers “not only to measurements of the depth of the water, but also to the depth measurements of the earth layers below”. It led, years later, to a Navy sonar project for mapping the underside of the ice pack floating in the Arctic Ocean to determine if submarines could safely navigate beneath it. Similarly, the 1967 patent for “Directional Filtering of Summed Arrays” for “maximization of signal output by means of a matched-filter technique” US Patent 3,307,190 with Robert A. Frosch explicitly recognizes the mathematical similarity between sound waves in water and electromagnetic waves in air. Indeed, the patent refers to the sonar and radar "arts", respectively, anticipating — before digital computers — many techniques, such as “time reversal”, that continue to see widespread application and extensive research today. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Clarence S. Clay, Jr.」の詳細全文を読む スポンサード リンク
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