The purpose of this study was to ascertain the potential erosion
impacts associated with ship movements in confined waters. The flow
associated with a ship passage can be separated accordingly: (1) the
propeller wake, (2) flow about the hull, and (3) associated waves.
Each of these areas has been analyzed...
Since the early 1960's, 44 states have passed legislation
that offers preferential property tax assessments to farmers. By most
accounts, these programs are intended to preserve farmland. Yet,
writers on the subject have argued that the preferential assessment
simply does not work to prevent the sales of agricultural land. In...
Salal is plant species that is native to forestland throughout the PNW and northern California that has been identified as a competitor to early crop tree development. This study consisted of a field and a radioisotope laboratory study to test four commonly used herbicides on salal (imazapyr, triclopyr, glyphosate, and...
It has been demonstrated that walking is the most common form of physical activity for adults with intellectual disabilities, including Down syndrome (DS). The pedometer is common measurement tool to quantify steps walked, yet there is little evidence of the psychometric properties for individuals with intellectual disabilities, particularly DS. Thus,...
The purpose of this study was to compare the accuracy of eight
anthropometric regression equations with hydrostatic weighing for
predicting the percent body fat of adult males with Down Syndrome
(DS). Body fat percentages were predicted for 18 adult males with DS.
Skinfold, circumference, and bioelectric impedance analysis data were...
Humans are increasing the scale and frequency of many natural disturbances, as well as adding novel disturbances to ecosystems. This thesis uses the arthropod community as a metric to examine the multi-trophic responses to disturbances in California grasslands. Chapter 2 explores how the long-term exclusion of native vertebrate herbivores has...
The urinary excretion of 4-pyridoxic acid (PIC), the principle
end-product of vitamin B₆ metabolism found in human urine, was
measured in two populations in whom altered vitamin B₆ metabolism
has been reported: in women who use oral contraceptives and in
mental retardates with and without Down's syndrome.
In the first...
Rainfall interception is a primary control over the moisture input to a forested ecosystem through the partitioning of precipitation into throughfall, stemflow, and an evaporated component (i.e. the interception loss). Rainfall interception is a spatially and temporally varying process at multiple scales, but heterogeneity in interception processes are poorly understood...
Anterior cruciate ligament injuries are common in a wide variety of sports and most frequently occur during activities requiring rapid deceleration such as landing and cutting. Deceleration of the body's center of mass during movement results primarily from eccentric muscle contraction. This type of contraction serves to absorb energy from...