We present a methodology for creating a simulated foam microstructure for use in forward simulations of wave equations to quantitatively analyze the expected scattering phenomenon primarily responsible for the attenuation of interrogating signals in Sprayed-On Foam Insulation (SOFI). Our approach builds off of the popular use of Voronoi Tessalations for...
In 1961, the Technical Sub-Committee of the International Trawl Fishing Committee considered the petrale sole fishery: regulations, statistics, a report on fish-tagging experiments, and trends for the fishery. The group also considered mesh sizes and minimum sizes regulations for all species of bottomfish, and the Russo-Japanese fishery in the Eastern...
In 1959, when the International Trawl Fishery Committee was created, its membership was made up of personnel representing fish and wildlife agencies from Oregon, Washington, California, and the Canadian government. At its first meeting in November, 1959, the Commission created the Technical Sub-Committee. The Sub-Committee was instructed to review the...
The 1967 report includes catch/effort data, a review of major fisheries, and data on dispersion of tagged fish. The Technical Sub-Committee made an important recommendation to rescind the winter closure of the petrale sole fishery. The Sub-Committee voiced concern about the growing presence of Soviet and Japanese fishing vessels off...
The 1966 report was concerned with catch/effort data, reports on the statuses of major fisheries, reviews of data procedures, current research and joint projects, and dispersions of tagged fish. Other matters touched on include the developing hake fishery and increased international fishing off the Washington and Oregon coasts.
The 1970 report considers catch/effort, statuses of major fisheries, and cumulative fish tagging data. Other topics included a groundfish bibliography, international fishery problems, and the sablefish fishery. The report includes a synopsis of otter trawl regulations and their rationale as of July 1, 1970.
During an oceanographic cruise of the "E. W. Scripps" in May, 1939, off the coast of Oregon, four small, post-larval specimens of Anoplopoma fimitrita were taken at the surface of the sea with a dip net at two of the hydrographic stations off Cascade Head, Oregon.
Fire and other catastrophic disturbance events in the Douglas-fir forests of the Oregon Coast Range have been significant in determining the distribution of stand age classes and, hence, habitat. Except for the past half century, knowledge of fire in the region has largely been local and anecdotal. The Douglas-fir forests...
Local stability seems to imply global stability for population models. To investigate this claim, we formally define a population model. This definition seems to include the one-dimensional discrete models now in use. We derive a necessary and sufficient condition for the global stability of our defined class of models. We...