The recent reductions to the international dose limit recommendations for the lens
of the eye have renewed interest in radiation protection strategies in interventional
fluoroscopy, where eye-lens radiation exposure occurs frequently. Radiationshielding
eyewear can significantly reduce lens dose in these scenarios, but accurate
protection factors are elusive because they depend...
There is a new possibility of generating deep ultraviolet laser radiation from a solid-state source. With recent advances in material development, a new nonlinear optical crystal provides a greater damage threshold than current materials making higher conversion efficiencies possible.
This thesis examines the possibility of using this crystal to generate...
Environmental modeling as a result of the Fukushima accident has been at the forefront for present day health physics. The accident released radionuclides in the environment and the fate and transport of these radionuclides are of interest when considering doses to non-human biota. The Pale Grass Blue Butterfly was studied...
Providing students with the skills necessary to identify trees is an ongoing challenge at Oregon State University. Several colleges within the university offer courses that teach tree identification. In the College of Forestry alone, two courses are offered that emphasize identification of native and introduced trees. The content and format...
Stormwater runoff is a significant cause for impairment of many water bodies, a problem that will inevitably escalate due to increasing land-cover change associated with urbanization. The effect of stormwater runoff has spurred legislation and the subsequent development and adoption of Best Management Practices (BMPs) to treat stormwater. This work...
Internal dosimetry is challenging and relies on estimates using MIRD or ICRP biokinetic models. To address this, we looked at gene expression analysis in whole blood from radiotherapy patients. Patients with relapsed or refractory neuroblastoma who received ¹³¹I-mIBG at UCSF were used to correlate internal ionizing radiation (IR) dose with...
Cultural resource inventories have identified,205 individual sites
on public land along the Lower Salmon River, Idaho. These sites
represent a rich and diverse record of the human occupation and
utilization of the river canyon during the past 10,000 years. Each
of these 205 sites contains its own unique record of...
In this thesis the critical parameters involved in the
dislodgement and deformation of microbubbles in laminar
channel flow, are determined and evaluated. Experimentally
the effects of surface tension, viscosity, fluid flow rate,
density, and bubble diameter on bubble dislodgement were
evaluated. A theoretical scale analysis was performed which
provided a...
Pacific lampreys (Lampetra tridentata) have declined in abundance in the Columbia River Basin. Although, the reasons for the decline are unclear, we suggest that development of hydroelectric dams and habitat alterations in tributaries as the main causes. The available knowledge of life history of Pacific lampreys and status from dam...