ABSTRACT

SKOGERBOE 01.04. 1935 Cresco IA/USA 20.04. 2005 Ogden UT/USA Gaylord Vincent Skogerboe received the BS and the MS degrees in the early 1960s from University of Utah, Logan UT. He was then a resident engineer on the construction of Porcupine Dam in northern Utah until 1963, when joining his Alma Mater as a hydraulic engineer until 1968, then becoming until 1977 staff member of the Colorado State University, Fort Collins CO, during which period he developed best management practices for salinity control in the Grand Valley, western Colorado. He was in parallel concerned with the campus leadership for water management research projects both in Pakistan and Vietnam from 1974 to 1980, from when he presided over a small consulting firm at Fort Collins. Later, Skogerboe became professor in the Biological and Irrigation Department of the Utah State University, Logan UT, for a long term assignment as director of the International Irrigation Management Institute in Pakistan. Skogerboe authored numerous papers, and had conducted laboratory and field research particularly on the discharge measurement, and hydraulics in general. He had trained hundreds in domestic and overseas courses, and served as advisor of dozens of graduate students. He is remembered for his Cut-throat Flume, corresponding to an open channel discharge measurement structure of limited length. Whereas the standard structures have a length of some ten approach flow widths, his structure is much shorter involving a polygonial plan shape. For free flow conditions, the measurement of the approach flow depth alone allows for discharge prediction, whereas the tailwater depths needs to be known in addition for submerged flow conditions. Anonymous (1985). Skogerboe, G.V. Who’s who in engineering 6: 611. American Association of Engineering Societies: Washington DC. Skogerboe, G.V., Hyatt, M.L. (1967a). Analysis of submergence in flow measuring flumes. Journal of the Hydraulics Division ASCE 93(HY4): 183-200; 94(HY3): 774-794; 94(HY6): 1530-1531. Skogerboe, G.V., Hyatt, M.L. (1967b). Rectangular cut-throat flow measuring flumes. Journal of the Irrigation and Drainage Division ASCE 93(IR4): 1-13; 94(IR3): 357-362; 94(IR4): 527-530; 95(IR3): 433-439. Skogerboe, G.V., Merkley, G.P. (1996). Irrigation maintenance and operations learning process. Water Resources Publications: Littleton CO. https://www.wrpllc.com/authors/imolauthors.html P

SKRAMSTAD 26.07. 1908 Tacoma WA/USA 17.10. 2000 Melbourne Beach FL/USA Harold Kenneth Skramstad graduated from Puget Sound College, Tacoma WA, with the BS degree in 1930, and the PhD degree in 1935 from University of Washington, Seattle WA. He then joined the staff of the Aerodynamics Section, National Bureau of Standards NBS, engaged in wind tunnel turbulence. During the war he worked on guided missiles and played a key role in developing the Bat, the first fully-automatic guided missile. For this work, he received the Navy Bureau of Ordnance Exceptional Service Award in 1945, and in 1991 was elected to the Missile Technology Historical Association Hall of Fame. He became in 1946 chief of the NBS Guided Missiles Section. Later, he pioneered in digital computation and the development of computers. In 1967 he retired from government service joining the University of Miami, Coral Gables FL, as scientific director of the computing center and professor of industrial engineering. He then taught until 1984 courses at Florida Institute of Technology, Melbourne FL. Skramstad contributed to the stability problem of laminar boundary layer flow. The original equations were published by William M. Orr (1866-1934) in 1906, who found an exact solution for plane Couette flow, but was unable to find any unstable regions for this particular case. In 1908, Arnold J. Sommerfeld (1868-1951) independently derived these equations, yet without improving Orr’s results. In 1924, Werner K. Heisenberg (1901-1976) attempted a complicated asymptotic analysis which led to an erroneous result. Walter G. Tollmien (1900-1968) was more successful in 1929 and developed a stability curve. In 1944, Chia C. Lin (1916-2013) extended Tollmien’s results clarifying the behaviour of the solution. The 1947 paper of Galen B. Schubauer (1904-1992) and Skramstad completed the analysis using experiments on the effects of disturbances of a boundary layer, thereby confirming Lin’s and Tollmien’s analyses. Anonymous (1946). Skramstad named chief of guided missiles section. Aeronautical Engineering Review 5(12): 8. P Eckert, M. (2008). Turbulenz: Ein problemhistorischer Abriss. Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin 16(1): 39-71. Schubauer, G.B., Skramstad, H.K. (1947). Laminar boundary-layer oscillations and stability of laminar flow. Journal of the Aeronautical Sciences 14(2): 69-78. Skramstad, H.K. (1962). Combined analog-digital techniques in simulation. Advances in Computers 3: 275-298.