WEGMANN

WEGMANN 27.11. 1850 Rio de Janeiro/BR 03.01. 1935 Yonkers NY/USA Edward Wegmann was the son of Swiss parents. His early education was obtained in the public schools of Brooklyn NY and Zurich. He received the degree of civil engineering from New York University in 1871. After some years as a general civil engineer, he in 1884 began a thirty years service with the water supply system of New York City, as assistant engineer with the New York Aqueduct Commission. He first studied the design of profiles for the Quaker Bridge Dam to be built across Croton River, of which the height was 90 m, which was more than 30 m higher than any masonry dam built until then. He developed a simple formula for the dam section, which was adopted for the later Croton Dam, and other high dams of the USA. In 1885 Wegmann was appointed engineer of the Manhattan Division of the New Croton Aqueduct. The work included a tunnel under Harlem River and an aqueduct tunnel under the city. From 1893 to 1904 he was engineer in charge of the Croton River Division, supervising the construction of Muscoot Dam. From then to 1910 he continued until completion works for the Aqueduct Commission. Wegmann then started as a consulting engineer. He was engaged from 1918 to 1920 by the New York and New Jersey Harbour Development Commission to estimate the cost and the construction of subways, elevated roads, and freight terminals. In 1920, he reentered the service of New York City as consulting engineer and retired five years later. Wegmann authored the notable book Design and construction of masonry dams, which was originally published in 1888 and went through eight editions, its title eventually being changed to Design and construction of dams. It was widely used as a textbook both in the USA and abroad. Other notable works include his Water works of the city of New York, and Conveyance and distribution of water for water supply. Anonymous (1944). Wegmann, Edward. Dictionary of American biography 21: 699-700. Scribner’s: New York. Hager, W.H. (2009). Edward Wegmann, sein Leben und Werk. Wasser, Energie, Luft 100(3): 235-240. P Wegmann, E. (1888). The design and construction of masonry dams, giving the method employed in determining the profile of the Quaker Bridge Dam. Wiley: New York. Wegmann, E. (1896). The water-supply of the city of New York. Wiley: New York. Wegmann, E. (1911). The design and construction of dams including masonry, earth, rock-fill, timber, and steel structures, also the principal types of movable dams. Wiley: New York.

WEHAUSEN 23.09. 1913 Duluth MN/USA 06.10. 2005 Oakland CA/USA John Vrooman Wehausen graduated with the BS degree in 1934, the MS degree in 1935, and the PhD degree in 1938 from the University of Michigan, Ann Arbor MN as mathematician. He was instructor at Columbia University, New York NY until 1940, at University of Missouri, Kansas City MO, until 1944, mathematician at David Taylor Model Basin from 1946 to 1949, then until 1956 executive editor of the Mathematical Reviews, from when he joined until retirement the Institute of Engineering Research University of California, Berkeley CA as head of its mechanics research group and from 1959 to 1984 as professor of engineering sciences. He was in 1960 Fulbright Lecturer at University of Hamburg, Germany, and in 1967 a visiting professor at Flinders University, Australia, among others. Wehausen was a Fellow of the Society of Naval Architects and Marine Engineers, and its recipient of the 1984 Davidson Medal, the American Mathematical Society AMS, and since 1980 member of the National Academy of Engineering NAE. Wehausen contributed original scientific research in the areas of ship waves, ship manoeuvrability, floating systems in waves, and ship-generated solitary waves. He was the advocate of systematic theoretical analysis based on rational mechanics principles. In 1960 he published the 350 pages article Surface waves with Edmund V. Laitone (1915-2000). This synthesis has had such a long-lasting impact that it was republished in 2002. Wehausen also contributed review articles on the wave resistance of ships, and on the motion of floating bodies. Anonymous (1962). Prof. J. Wehausen. Mechanical Engineering 84(8): 82. P Anonymous (1987). J.V. Wehausen. I have a photographic memory: 76, P.R. Harmos, ed. American Mathematical Society: Providence RI. P Anonymous (1991). Wehausen, John V. Who’s who in America 46: 3418. Marquis: Chicago. Wehausen, J.V., Laitone, E.V. (1960). Surface waves. Handbuch der Physik 9: 446-778. Springer: Berlin Wehausen, J. (1964). Effect of the initial acceleration upon the wave resistance of ship models. Journal of Ship Research 7(3): 38-50. Wehausen, J. (1973). The wave resistance of ships. Advances in applied mechanics 13: 93-245, C.-S. Yih, ed. Academic Press: New York. https://www.universityofcalifornia.edu/senate/inmemoriam/johnwehausen.htm P https://en.wikipedia.org/wiki/John_V._Wehausen P