A computer model is developed to estimate the initial investment and annual operating costs of feedlot runoff control systems. Costs are estimated for complete control systems consisting of a retention pond, settling basin, clean water diversion-runoff collection structures, disposal site, and an irrigation system. The model requires design inputs and...
The global cryosphere, defined as the world’s ice and snow covered regions, is a crucial water source for society and ecosystem functions, as well as an important regulator of the earth’s energy budget. Melt from glaciers and seasonal snow cover provides water for more than a sixth of the world’s...
Recreational fishing has a long history in the USA, developing from the subsistence fisheries of Native Americans together with a partial subsistence fishery of later immigrants. Marine, diadromous, and aquatic taxa are targeted, including both vertebrates and macroinvertebrates. This paper defines recreational fishing, describes the main fishing techniques, identifies target...
The exposure needed for a clinically useful image requires much less precision when using digital radiography (DR) than when using screen/film (SF) radiography. The Automatic Exposure Control (AEC) device was developed for ensuring accurate and precise exposures with SF technology. This thesis evaluates the importance of the AEC device in...
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AN ABSTRACT OF THE THESIS OF
RobertM. Allman for the degree of Master of Science in Radiation
The lakes, rivers and coastal waters of Oregon have long provided the state's residents
and visitors with unique recreational boating environs and opportunities. However, this popular
activity represents more than a form of recreation: boating is an important component of the
Oregon economy. Each year, boaters spend millions of dollars...
This investigation was a two stage study performed in two urban/
rural communities in Washington State. Stage I was an effort to replicate a study performed in an eastern Virginia school district whereby
results were obtained demonstrating that 9th graders and black students
identified teacher warmth behaviors as being important...
