A two-dimensional perturbation theory computer code,
PERT-IV, has been developed that will calculate reactivity
coefficients, the delayed neutron fraction, and the neutron
generation time.
The program uses the output flux and adjoint
flux from either a diffusion theory or transport theory program.
A discussion and derivation of the perturbation equation...
The purpose of this study was to investigate the effects of wildfire on soil hydraulic properties of forested hillslopes. The study site was located within the Stouts Creek wildfire, which burned approximately 10,705 ha of forest in southwestern Oregon in summer 2015. Three soil hydraulic properties (soil moisture, unsaturated hydraulic...
The fracture mechanics of Charpy V-notch specimens of
Zircaloy-4 and phosphorus contaminated Zircaloy-4 were
investigated. Three-point bend and impact tests with Charpy
V-notch samples provided an efficient and economical method
of fracture evaluation. Fracture failure was monitored by
the force-displacement curve. Failure was initially
analyzed using fracture toughness values as...
Twenty-six Holstein and 18 Jersey multiparous cows in a randomized block design were assigned by calving date and breed to a non-anionic prepartum diet (CTRL) or a treatment diet containing a commercial anionic salt supplement (Animate®). Control and treatment diets were formulated to a dietary anion-cation difference (DCAD) of 21.3...
Edge effects resulting from forest fragmentation are likely to alter the distributions and
interactions of resident species. I evaluated changes in species composition, species
turnover, and relative abundance of ground arthropods across replicated transects
extending from regenerating clearcuts into old-growth Douglas-fir forests. Arthropods
were collected from 3-August to 14-September in...
Natural products from both terrestrial and marine sources represent a significant source of novel drug leads, and have previously been developed into clinically-approved agents for the treatment of various human diseases. This work represents the biological characterization of the mechanistic basis for activity of several natural product structures in models...
Grapes (e.g. Vitis vinifera L.) are one of the more important fruit crops from an economic standpoint with world market values over 550 million US dollars in 2007 and 2008, second to apples (United States Department of Agriculture). While a satisfactory level of ripeness is of primary concern, the quality...