Precise in situ measurement of the spectral absorption and scattering coefficients in several regions has revealed patterns in the distribution of the inherent optical properties on spatial scales that were previously unobtainable. The precision of the measurements was found to be consistent and unbiased across a variety of oceanic regimes...
In an effort to elucidate the mechanism responsible for large-scale
zooplankton variability in the California Current, zooplankton biomass and
hydrographic data from the California Cooperative Fisheries Investigation
data set and wind data from Fleet Numerical Oceanography Center model
analyses have been used to construct a box model biomass budget. The...
The mechanisms governing short- and long-term belowground carbon dynamics need to be understood. As part of a larger project developed to assess the effect of quantity and quality of litter inputs on the rate of soil organic matter (SOM) formation, I examined SOM in the H. J. Andrews Detritus Input...
The links between forests, streamflow, and climate are poorly understood. Despite hundreds of studies over the past 60 years, fundamental questions of forests' effects on the hydrologic cycle remain unanswered. The hydrological cycle involves mutually-dependent biological and physical processes that operate at multiple scales of time and space, and this...
School-based comprehensive sex education (CSE) can reduce adolescent sexual health problems. However, only 49-55% of adolescents receive CSE that meets national standards. African American youth (AAY), particularly males, are less likely to receive CSE. AAY evidence a high prevalence of STIs/teen pregnancy. Internet-based CSE offers a supplemental option. We examined...
Purposes of the Study The study had several purposes, the major one being to
determine the common professional education competencies needed by
community college instructors of trade and industrial education. Two
other purposes of the study were to determine if differences existed
among community colleges according to scores trade and...
Cores taken from the ridge areas of the Gorda-Juan de Fuca
plate have a sedimentation rate that is appropriate for the study of
late Quaternary stratigraphy. An analysis of the clay and silt
mineralogy of the cores using X-ray diffraction methods and by
noting changes in the foraminiferan-radiolarian abundances in...
In the Oregon Cascade Range, conifer encroachment has reduced the extent of mountain meadows by as much as 50% since the mid-1940s. Although encroachment results in a general decline of meadow species abundance and diversity, species differ in their sensitivities to encroachment: some show rapid declines whereas others persist in...
Wheat (Triticum aestivum) is one of the world’s major staple food crops, with flour produced from starchy endosperm being used for breads, cakes, noodles and various other wheat-based foods. The unique bread making properties of wheat are primarily attributed to its gluten-forming storage proteins: gliadins and glutenins. This study investigated...
This dissertation consists of three papers on land use economics and regulation. The
first paper reviews numerous past literatures on how land-use regulation, agricultural
subsidies, and use-value assessment method affect land values. The second paper uses a
theoretical model to analyze how imposing minimum-lot-size zoning and different
designs of minimum-lot-size...
