3,120 research outputs found
Affine motion of 2d incompressible fluids surrounded by vacuum and flows in
The affine motion of two-dimensional (2d) incompressible fluids surrounded by
vacuum can be reduced to a completely integrable and globally solvable
Hamiltonian system of ordinary differential equations for the deformation
gradient in . In the case of perfect fluids, the
motion is given by geodesic flow in with the
Euclidean metric, while for magnetically conducting fluids (MHD), the motion is
governed by a harmonic oscillator in . A complete
classification of the dynamics is given including rigid motions, rotating
eddies with stable and unstable manifolds, and solutions with vanishing
pressure. For perfect fluids, the displacement generically becomes unbounded,
as . For MHD, solutions are bounded and generically
quasi-periodic and recurrent.Comment: 60 pages, 7 figure
ECONOMIC VALUATION OF SOME WETLAND OUTPUTS OF MUD LAKE, MINNESOTA-SOUTH DAKOTA
The objective of this study was to estimate some economic values of Mud Lake, a managed, lacustrine wetland on the Minnesota-South Dakota border. Several outputs of Mud Lake were identified and an economic value was estimated for each. Flood control was valued at approximately 94 per acre; fish/wildlife habitat, recreation, and aesthetics were valued at about 180. When capitalized at 6 percent, the estimated total annual value of these four outputs is $6,250 per acre. These values can assist managers and policy makers in making decisions regarding the opportunity costs of Mud Lake management options or of wetland alterations or preservation. These snapshot values of Mud Lake "at the margin" are estimated under the assumption that all other wetlands and water resources in the region are unchanged.wetland, outputs, economic valuation, flood control, water supply, water quality, recreation, aesthetics, fish/wildlife habitat, contingent valuation method, Resource /Energy Economics and Policy, Land Economics/Use,
Ratiocination, Romanticism and Realism in the Detective Story: A Study of Poe, Doyle and Hammet
A thesis presented to the faculty of the School of Humanities at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Arts by Timothy Jay Roberts on December 3, 1984
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