The songs of the Bewick's Wren are discrete units of one to three
seconds duration with intersong intervals several times the length of
the song. Individual song repertoires at the William Finley National
Wildlife Refuge, Oregon, range from 13 to 20 song types, and a given
song type is repeated...
Epidemiological studies have suggested that the consumption
of fish may reduce the risk of cardiovascular disease.
Compared to the number of studies using fish oils, few
studies have used fish itself. Those which have used fish
have generally used fattier fish such as mackerel and salmon
as part of an...
Three trials with wethers and four trials with steers were
conducted to determine some of the effects of sodium bicarbonate,
calcium hydroxide and/or transfer of ruminal contents on ruminant
adjustment to abrupt changes to concentrate rations.
Lambs fed a basal concentrate diet plus sodium bicarbonate had
the highest average feed...
In this dissertation, a group of vehicle dynamics simulation tools is developed with two primary goals: to accurately represent vehicle behavior and to provide insight that improves the understanding of vehicle performance. Three tools are developed that focus on tire modeling, vehicle modeling and lap time simulation.
Tire modeling is...
Since the late 1990s accelerated growth in health care spending coupled with a cost shift of health insurance from employers to employees has created an increased financial burden for many families. Past research suggests that financial burden due to out-of-pocket (OOP) health care costs limits access to health care and...
High severity fire is a historical and integral disturbance process in coniferous
forest types. Compounded disturbances such as multiple fires or post-disturbance
management activities are increasingly common, but ecological responses are not well
understood and may represent novel types of disturbances. I studied bird and small
mammal communities in the...
A study was conducted to investigate the nature of hydroxy
interlayers in the chlorite-like intergrade clays of three Oregon
soils with respect to kind, amount, stability, and conditions of
formation.
The clays of the Hembre, Wren, and Lookout soils, selected to
represent weathering products originating from basaltic materials
under humid,...
Calls for reform within engineering education frequently cite the need to better prepare the future workforce for the imminent challenges that they will face. The focus in preparing students for the workforce is often on the educational system and not on understanding the actual workplace. But if we are to...
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Devlin B. Montfort
Calls for reform within engineering education frequently cite the need
Climate change is a global phenomenon, but natural selection occurs within landscapes. A central tenet of landscape ecology is that mobile species depend on complementary habitats, which are insufficient in isolation, but combine to support animals through the full annual cycle. For coldwater fishes, it is widely assumed that maximum...